Synapse 1.32.0 (2021-04-20)

Note: This release introduces a regression that can overwhelm connected Prometheus instances. This issue was not present in Synapse v1.32.0rc1. It is recommended not to update to this release. If you have upgraded to v1.32.0 already, please downgrade to v1.31.0. This issue will be resolved in a subsequent release version shortly.

Note: This release requires Python 3.6+ and Postgres 9.6+ or SQLite 3.22+.

This release removes the deprecated GET /_synapse/admin/v1/users/<user_id> admin API. Please use the v2 API instead, which has improved capabilities.

This release requires Application Services to use type m.login.application_service when registering users via the /_matrix/client/r0/register endpoint to comply with the spec. Please ensure your Application Services are up to date.

If you are using the packages.matrix.org Debian repository for Synapse packages, note that we have recently updated the expiry date on the gpg signing key. If you see an error similar to The following signatures were invalid: EXPKEYSIG F473DD4473365DE1, you will need to get a fresh copy of the keys. You can do so with:

sudo wget -O /usr/share/keyrings/matrix-org-archive-keyring.gpg https://packages.matrix.org/debian/matrix-org-archive-keyring.gpg

Bugfixes

Fix the log lines of nested logging contexts. Broke in 1.32.0rc1. (#9829)

Synapse 1.32.0rc1 (2021-04-13)

Features

Add a Synapse module for routing presence updates between users. (#9491)
Add an admin API to manage ratelimit for a specific user. (#9648)
Include request information in structured logging output. (#9654)
Add order_by to the admin API GET /_synapse/admin/v2/users. Contributed by @dklimpel. (#9691)
Replace the room_invite_state_types configuration setting with room_prejoin_state. (#9700)
Add experimental support for MSC3083: restricting room access via group membership. (#9717, #9735)
Update experimental support for Spaces: include m.room.create in the room state sent with room-invites. (#9710)
Synapse now requires Python 3.6 or later. It also requires Postgres 9.6 or later or SQLite 3.22 or later. (#9766)

Bugfixes

Prevent synapse_forward_extremities and synapse_excess_extremity_events Prometheus metrics from initially reporting zero-values after startup. (#8926)
Fix recently added ratelimits to correctly honour the application service rate_limited flag. (#9711)
Fix longstanding bug which caused duplicate key value violates unique constraint "remote_media_cache_thumbnails_media_origin_media_id_thumbna_key" errors. (#9725)
Fix bug where sharded federation senders could get stuck repeatedly querying the DB in a loop, using lots of CPU. (#9770)
Fix duplicate logging of exceptions thrown during federation transaction processing. (#9780)

Updates to the Docker image

Move opencontainers labels to the final Docker image such that users can inspect them. (#9765)

Improved Documentation

Make the allowed_local_3pids regex example in the sample config stricter. (#9719)

Deprecations and Removals

Remove old admin API GET /_synapse/admin/v1/users/<user_id>. (#9401)
Make /_matrix/client/r0/register expect a type of m.login.application_service when an Application Service registers a user, to align with the relevant spec. (#9548)

Internal Changes

Replace deprecated imp module with successor importlib. Contributed by Cristina Muñoz. (#9718)
Experiment with GitHub Actions for CI. (#9661)
Introduce flake8-bugbear to the test suite and fix some of its lint violations. (#9682)
Update scripts-dev/complement.sh to use a local checkout of Complement, allow running a subset of tests and have it use Synapse's Complement test blacklist. (#9685)
Improve Jaeger tracing for to_device messages. (#9686)
Add release helper script for automating part of the Synapse release process. (#9713)
Add type hints to expiring cache. (#9730)
Convert various testcases to HomeserverTestCase. (#9736)
Start linting mypy with no_implicit_optional. (#9742)
Add missing type hints to federation handler and server. (#9743)
Check that a ConfigError is raised, rather than simply Exception, when appropriate in homeserver config file generation tests. (#9753)
Fix incompatibility with tox 2.5. (#9769)
Enable Complement tests for MSC2946: Spaces Summary API. (#9771)
Use mock from the standard library instead of a separate package. (#9772)
Update Black configuration to target Python 3.6. (#9781)
Add option to skip unit tests when building Debian packages. (#9793)

Synapse 1.31.0 (2021-04-06)

Note: As announced in v1.25.0, and in line with the deprecation policy for platform dependencies, this is the last release to support Python 3.5 and PostgreSQL 9.5. Future versions of Synapse will require Python 3.6+ and PostgreSQL 9.6+, as per our deprecation policy.

This is also the last release that the Synapse team will be publishing packages for Debian Stretch and Ubuntu Xenial.

Improved Documentation

Add a document describing the deprecation policy for platform dependencies. (#9723)

Internal Changes

Revert using dmypy run in lint script. (#9720)
Pin flake8-bugbear's version. (#9734)

Synapse 1.31.0rc1 (2021-03-30)

Features

Add support to OpenID Connect login for requiring attributes on the userinfo response. Contributed by Hubbe King. (#9609)
Add initial experimental support for a "space summary" API. (#9643, #9652, #9653)
Add support for the busy presence state as described in MSC3026. (#9644)
Add support for credentials for proxy authentication in the HTTPS_PROXY environment variable. (#9657)

Bugfixes

Fix a longstanding bug that could cause issues when editing a reply to a message. (#9585)
Fix the /capabilities endpoint to return m.change_password as disabled if the local password database is not used for authentication. Contributed by @dklimpel. (#9588)
Check if local passwords are enabled before setting them for the user. (#9636)
Fix a bug where federation sending can stall due to concurrent access database exceptions when it falls behind. (#9639)
Fix a bug introduced in Synapse 1.30.1 which meant the suggested pip incantation to install an updated cryptography was incorrect. (#9699)

Updates to the Docker image

Speed up Docker builds and make it nicer to test against Complement while developing (install all dependencies before copying the project). (#9610)
Include opencontainers labels in the Docker image. (#9612)

Improved Documentation

Clarify that register_new_matrix_user is present also when installed via non-pip package. (#9074)
Update source install documentation to mention platform prerequisites before the source install steps. (#9667)
Improve worker documentation for fallback/web auth endpoints. (#9679)
Update the sample configuration for OIDC authentication. (#9695)

Internal Changes

Preparatory steps for removing redundant outlier data from event_json.internal_metadata column. (#9411)
Add type hints to the caching module. (#9442)
Introduce flake8-bugbear to the test suite and fix some of its lint violations. (#9499, #9659)
Add additional type hints to the Homeserver object. (#9631, #9638, #9675, #9681)
Only save remote cross-signing and device keys if they're different from the current ones. (#9634)
Rename storage function to fix spelling and not conflict with another function's name. (#9637)
Improve performance of federation catch up by sending the latest events in the room to the remote, rather than just the last event sent by the local server. (#9640, #9664)
In the federation_client commandline client, stop automatically adding the URL prefix, so that servlets on other prefixes can be tested. (#9645)
In the federation_client commandline client, handle inline signing_keys in homeserver.yaml. (#9647)
Fixed some antipattern issues to improve code quality. (#9649)
Add a storage method for pulling all current user presence state from the database. (#9650)
Import HomeServer from the proper module. (#9665)
Increase default join ratelimiting burst rate. (#9674)
Add type hints to third party event rules and visibility modules. (#9676)
Bump mypy-zope to 0.2.13 to fix "Cannot determine consistent method resolution order (MRO)" errors when running mypy a second time. (#9678)
Use interpreter from $PATH via /usr/bin/env instead of absolute paths in various scripts. (#9689)
Make it possible to use dmypy. (#9692)
Suppress "CryptographyDeprecationWarning: int_from_bytes is deprecated". (#9698)
Use dmypy run in lint script for improved performance in type-checking while developing. (#9701)
Fix undetected mypy error when using Python 3.6. (#9703)
Fix type-checking CI on develop. (#9709)

Synapse 1.30.1 (2021-03-26)

This release is identical to Synapse 1.30.0, with the exception of explicitly setting a minimum version of Python's Cryptography library to ensure that users of Synapse are protected from the recent OpenSSL security advisories, especially CVE-2021-3449.

Note that Cryptography defaults to bundling its own statically linked copy of OpenSSL, which means that you may not be protected by your operating system's security updates.

It's also worth noting that Cryptography no longer supports Python 3.5, so admins deploying to older environments may not be protected against this or future vulnerabilities. Synapse will be dropping support for Python 3.5 at the end of March.

Updates to the Docker image

Ensure that the docker container has up to date versions of openssl. (#9697)

Internal Changes

Enforce that cryptography dependency is up to date to ensure it has the most recent openssl patches. (#9697)

Synapse 1.30.0 (2021-03-22)

Note that this release deprecates the ability for appservices to call POST /_matrix/client/r0/register without the body parameter type. Appservice developers should use a type value of m.login.application_service as per the spec. In future releases, calling this endpoint with an access token - but without a m.login.application_service type - will fail.

No significant changes.

Synapse 1.30.0rc1 (2021-03-16)

Features

Add prometheus metrics for number of users successfully registering and logging in. (#9510, #9511, #9573)
Add synapse_federation_last_sent_pdu_time and synapse_federation_last_received_pdu_time prometheus metrics, which monitor federation delays by reporting the timestamps of messages sent and received to a set of remote servers. (#9540)
Add support for generating JSON Web Tokens dynamically for use as OIDC client secrets. (#9549)
Optimise handling of incomplete room history for incoming federation. (#9601)
Finalise support for allowing clients to pick an SSO Identity Provider (MSC2858). (#9617)
Tell spam checker modules about the SSO IdP a user registered through if one was used. (#9626)

Bugfixes

Fix long-standing bug when generating thumbnails for some images with transparency: TypeError: cannot unpack non-iterable int object. (#9473)
Purge chain cover indexes for events that were purged prior to Synapse v1.29.0. (#9542, #9583)
Fix bug where federation requests were not correctly retried on 5xx responses. (#9567)
Fix re-activating an account via the admin API when local passwords are disabled. (#9587)
Fix a bug introduced in Synapse 1.20 which caused incoming federation transactions to stack up, causing slow recovery from outages. (#9597)
Fix a bug introduced in v1.28.0 where the OpenID Connect callback endpoint could error with a MacaroonInitException. (#9620)
Fix Internal Server Error on GET /_synapse/client/saml2/authn_response request. (#9623)

Updates to the Docker image

Make use of an improved malloc implementation (jemalloc) in the docker image. (#8553)

Improved Documentation

Add relayd entry to reverse proxy example configurations. (#9508)
Improve the SAML2 upgrade notes for 1.27.0. (#9550)
Link to the "List user's media" admin API from the media admin API docs. (#9571)
Clarify the spam checker modules documentation example to mention that parse_config is a required method. (#9580)
Clarify the sample configuration for stats settings. (#9604)

Deprecations and Removals

The synapse_federation_last_sent_pdu_age and synapse_federation_last_received_pdu_age prometheus metrics have been removed. They are replaced by synapse_federation_last_sent_pdu_time and synapse_federation_last_received_pdu_time. (#9540)
Registering an Application Service user without using the m.login.application_service login type will be unsupported in an upcoming Synapse release. (#9559)

Internal Changes

Add tests to ResponseCache. (#9458)
Add type hints to purge room and server notice admin API. (#9520)
Add extra logging to ObservableDeferred when callbacks throw exceptions. (#9523)
Fix incorrect type hints. (#9528, #9543, #9591, #9608, #9618)
Add an additional test for purging a room. (#9541)
Add a .git-blame-ignore-revs file with the hashes of auto-formatting. (#9560)
Increase the threshold before which outbound federation to a server goes into "catch up" mode, which is expensive for the remote server to handle. (#9561)
Fix spurious errors reported by the config-lint.sh script. (#9562)
Fix type hints and tests for BlacklistingAgentWrapper and BlacklistingReactorWrapper. (#9563)
Do not have mypy ignore type hints from unpaddedbase64. (#9568)
Improve efficiency of calculating the auth chain in large rooms. (#9576)
Convert synapse.types.Requester to an attrs class. (#9586)
Add logging for redis connection setup. (#9590)
Improve logging when processing incoming transactions. (#9596)
Remove unused stats.retention setting, and emit a warning if stats are disabled. (#9604)
Prevent attempting to bundle aggregations for state events in /context APIs. (#9619)

Synapse 1.29.0 (2021-03-08)

Note that synapse now expects an X-Forwarded-Proto header when used with a reverse proxy. Please see UPGRADE.rst for more details on this change.

No significant changes.

Synapse 1.29.0rc1 (2021-03-04)

Features

Add rate limiters to cross-user key sharing requests. (#8957)
Add order_by to the admin API GET /_synapse/admin/v1/users/<user_id>/media. Contributed by @dklimpel. (#8978)
Add some configuration settings to make users' profile data more private. (#9203)
The no_proxy and NO_PROXY environment variables are now respected in proxied HTTP clients with the lowercase form taking precedence if both are present. Additionally, the lowercase https_proxy environment variable is now respected in proxied HTTP clients on top of existing support for the uppercase HTTPS_PROXY form and takes precedence if both are present. Contributed by Timothy Leung. (#9372)
Add a configuration option, user_directory.prefer_local_users, which when enabled will make it more likely for users on the same server as you to appear above other users. (#9383, #9385)
Add support for regenerating thumbnails if they have been deleted but the original image is still stored. (#9438)
Add support for X-Forwarded-Proto header when using a reverse proxy. (#9472, #9501, #9512, #9539)

Bugfixes

Fix a bug where users' pushers were not all deleted when they deactivated their account. (#9285, #9516)
Fix a bug where a lot of unnecessary presence updates were sent when joining a room. (#9402)
Fix a bug that caused multiple calls to the experimental shared_rooms endpoint to return stale results. (#9416)
Fix a bug in single sign-on which could cause a "No session cookie found" error. (#9436)
Fix bug introduced in v1.27.0 where allowing a user to choose their own username when logging in via single sign-on did not work unless an idp_icon was defined. (#9440)
Fix a bug introduced in v1.26.0 where some sequences were not properly configured when running synapse_port_db. (#9449)
Fix deleting pushers when using sharded pushers. (#9465, #9466, #9479, #9536)
Fix missing startup checks for the consistency of certain PostgreSQL sequences. (#9470)
Fix a long-standing bug where the media repository could leak file descriptors while previewing media. (#9497)
Properly purge the event chain cover index when purging history. (#9498)
Fix missing chain cover index due to a schema delta not being applied correctly. Only affected servers that ran development versions. (#9503)
Fix a bug introduced in v1.25.0 where /_synapse/admin/join/ would fail when given a room alias. (#9506)
Prevent presence background jobs from running when presence is disabled. (#9530)
Fix rare edge case that caused a background update to fail if the server had rejected an event that had duplicate auth events. (#9537)

Improved Documentation

Update the example systemd config to propagate reloads to individual units. (#9463)

Internal Changes

Add documentation and type hints to parse_duration. (#9432)
Remove vestiges of uploads_path configuration setting. (#9462)
Add a comment about systemd-python. (#9464)
Test that we require validated email for email pushers. (#9496)
Allow python to generate bytecode for synapse. (#9502)
Fix incorrect type hints. (#9515, #9518)
Add type hints to device and event report admin API. (#9519)
Add type hints to user admin API. (#9521)
Bump the versions of mypy and mypy-zope used for static type checking. (#9529)

Synapse 1.28.0 (2021-02-25)

Note that this release drops support for ARMv7 in the official Docker images, due to repeated problems building for ARMv7 (and the associated maintenance burden this entails).

This release also fixes the documentation included in v1.27.0 around the callback URI for SAML2 identity providers. If your server is configured to use single sign-on via a SAML2 IdP, you may need to make configuration changes. Please review UPGRADE.rst for more details on these changes.

Internal Changes

Revert change in v1.28.0rc1 to remove the deprecated SAML endpoint. (#9474)

Synapse 1.28.0rc1 (2021-02-19)

Removal warning

The v1 list accounts API is deprecated and will be removed in a future release. This API was undocumented and misleading. It can be replaced by the v2 list accounts API, which has been available since Synapse 1.7.0 (2019-12-13).

Please check if you're using any scripts which use the admin API and replace GET /_synapse/admin/v1/users/<user_id> with GET /_synapse/admin/v2/users.

Features

New admin API to get the context of an event: /_synapse/admin/rooms/{roomId}/context/{eventId}. (#9150)
Further improvements to the user experience of registration via single sign-on. (#9300, #9301)
Add hook to spam checker modules that allow checking file uploads and remote downloads. (#9311)
Add support for receiving OpenID Connect authentication responses via form POSTs rather than GETs. (#9376)
Add the shadow-banning status to the admin API for user info. (#9400)

Bugfixes

Fix long-standing bug where sending email notifications would fail for rooms that the server had since left. (#9257)
Fix bug introduced in Synapse 1.27.0rc1 which meant the "session expired" error page during SSO registration was badly formatted. (#9296)
Assert a maximum length for some parameters for spec compliance. (#9321, #9393)
Fix additional errors when previewing URLs: "AttributeError 'NoneType' object has no attribute 'xpath'" and "ValueError: Unicode strings with encoding declaration are not supported. Please use bytes input or XML fragments without declaration.". (#9333)
Fix a bug causing Synapse to impose the wrong type constraints on fields when processing responses from appservices to /_matrix/app/v1/thirdparty/user/{protocol}. (#9361)
Fix bug where Synapse would occasionally stop reconnecting to Redis after the connection was lost. (#9391)
Fix a long-standing bug when upgrading a room: "TypeError: '>' not supported between instances of 'NoneType' and 'int'". (#9395)
Reduce the amount of memory used when generating the URL preview of a file that is larger than the max_spider_size. (#9421)
Fix a long-standing bug in the deduplication of old presence, resulting in no deduplication. (#9425)
The ui_auth.session_timeout config option can now be specified in terms of number of seconds/minutes/etc/. Contributed by Rishabh Arya. (#9426)
Fix a bug introduced in v1.27.0: "TypeError: int() argument must be a string, a bytes-like object or a number, not 'NoneType." related to the user directory. (#9428)

Updates to the Docker image

Drop support for ARMv7 in Docker images. (#9433)

Improved Documentation

Reorganize CHANGELOG.md. (#9281)
Add note to auto_join_rooms config option explaining existing rooms must be publicly joinable. (#9291)
Correct name of Synapse's service file in TURN howto. (#9308)
Fix the braces in the oidc_providers section of the sample config. (#9317)
Update installation instructions on Fedora. (#9322)
Add HTTP/2 support to the nginx example configuration. Contributed by David Vo. (#9390)
Update docs for using Gitea as OpenID provider. (#9404)
Document that pusher instances are shardable. (#9407)
Fix erroneous documentation from v1.27.0 about updating the SAML2 callback URL. (#9434)

Deprecations and Removals

Deprecate old admin API GET /_synapse/admin/v1/users/<user_id>. (#9429)

Internal Changes

Fix 'object name reserved for internal use' errors with recent versions of SQLite. (#9003)
Add experimental support for running Synapse with PyPy. (#9123)
Deny access to additional IP addresses by default. (#9240)
Update the Cursor type hints to better match PEP 249. (#9299)
Add debug logging for SRV lookups. Contributed by @Bubu. (#9305)
Improve logging for OIDC login flow. (#9307)
Share the code for handling required attributes between the CAS and SAML handlers. (#9326)
Clean up the code to load the metadata for OpenID Connect identity providers. (#9362)
Convert tests to use HomeserverTestCase. (#9377, #9396)
Update the version of black used to 20.8b1. (#9381)
Allow OIDC config to override discovered values. (#9384)
Remove some dead code from the acceptance of room invites path. (#9394)
Clean up an unused method in the presence handler code. (#9408)

Synapse 1.27.0 (2021-02-16)

Note that this release includes a change in Synapse to use Redis as a cache ─ as well as a pub/sub mechanism ─ if Redis support is enabled for workers. No action is needed by server administrators, and we do not expect resource usage of the Redis instance to change dramatically.

This release also changes the callback URI for OpenID Connect (OIDC) and SAML2 identity providers. If your server is configured to use single sign-on via an OIDC/OAuth2 or SAML2 IdP, you may need to make configuration changes. Please review UPGRADE.rst for more details on these changes.

This release also changes escaping of variables in the HTML templates for SSO or email notifications. If you have customised these templates, please review UPGRADE.rst for more details on these changes.

Bugfixes

Fix building Docker images for armv7. (#9405)

Synapse 1.27.0rc2 (2021-02-11)

Features

Further improvements to the user experience of registration via single sign-on. (#9297)

Bugfixes

Fix ratelimiting introduced in v1.27.0rc1 for invites to respect the ratelimit flag on application services. (#9302)
Do not automatically calculate public_baseurl since it can be wrong in some situations. Reverts behaviour introduced in v1.26.0. (#9313)

Improved Documentation

Clarify the sample configuration for changes made to the template loading code. (#9310)

Synapse 1.27.0rc1 (2021-02-02)

Features

Add an admin API for getting and deleting forward extremities for a room. (#9062)
Add an admin API for retrieving the current room state of a room. (#9168)
Add experimental support for allowing clients to pick an SSO Identity Provider (MSC2858). (#9183, #9242)
Add an admin API endpoint for shadow-banning users. (#9209)
Add ratelimits to the 3PID /requestToken APIs. (#9238)
Add support to the OpenID Connect integration for adding the user's email address. (#9245)
Add ratelimits to invites in rooms and to specific users. (#9258)
Improve the user experience of setting up an account via single-sign on. (#9262, #9272, #9275, #9276, #9277, #9286, #9287)
Add phone home stats for encrypted messages. (#9283)
Update the redirect URI for OIDC authentication. (#9288)

Bugfixes

Fix spurious errors in logs when deleting a non-existant pusher. (#9121)
Fix a long-standing bug where Synapse would return a 500 error when a thumbnail did not exist (and auto-generation of thumbnails was not enabled). (#9163)
Fix a long-standing bug where an internal server error was raised when attempting to preview an HTML document in an unknown character encoding. (#9164)
Fix a long-standing bug where invalid data could cause errors when calculating the presentable room name for push. (#9165)
Fix bug where we sometimes didn't detect that Redis connections had died, causing workers to not see new data. (#9218)
Fix a bug where None was passed to Synapse modules instead of an empty dictionary if an empty module config block was provided in the homeserver config. (#9229)
Fix a bug in the make_room_admin admin API where it failed if the admin with the greatest power level was not in the room. Contributed by Pankaj Yadav. (#9235)
Prevent password hashes from getting dropped if a client failed threepid validation during a User Interactive Auth stage. Removes a workaround for an ancient bug in Riot Web <v0.7.4. (#9265)
Fix single-sign-on when the endpoints are routed to synapse workers. (#9271)

Improved Documentation

Add docs for using Gitea as OpenID provider. (#9134)
Add link to Matrix VoIP tester for turn-howto. (#9135)
Add notes on integrating with Facebook for SSO login. (#9244)

Deprecations and Removals

The service_url parameter in cas_config is deprecated in favor of public_baseurl. (#9199)
Add new endpoint /_synapse/client/saml2 for SAML2 authentication callbacks, and deprecate the old endpoint /_matrix/saml2. (#9289)

Internal Changes

Add tests to test_user.UsersListTestCase for List Users Admin API. (#9045)
Various improvements to the federation client. (#9129)
Speed up chain cover calculation when persisting a batch of state events at once. (#9176)
Add a long_description_type to the package metadata. (#9180)
Speed up batch insertion when using PostgreSQL. (#9181, #9188)
Emit an error at startup if different Identity Providers are configured with the same idp_id. (#9184)
Improve performance of concurrent use of StreamIDGenerators. (#9190)
Add some missing source directories to the automatic linting script. (#9191)
Precompute joined hosts and store in Redis. (#9198, #9227)
Clean-up template loading code. (#9200)
Fix the Python 3.5 old dependencies build. (#9217)
Update isort to v5.7.0 to bypass a bug where it would disagree with black about formatting. (#9222)
Add type hints to handlers code. (#9223, #9232)
Fix Debian package building on Ubuntu 16.04 LTS (Xenial). (#9254)
Minor performance improvement during TLS handshake. (#9255)
Refactor the generation of summary text for email notifications. (#9260)
Restore PyPy compatibility by not calling CPython-specific GC methods when under PyPy. (#9270)

Synapse 1.26.0 (2021-01-27)

This release brings a new schema version for Synapse and rolling back to a previous version is not trivial. Please review UPGRADE.rst for more details on these changes and for general upgrade guidance.

No significant changes since 1.26.0rc2.

Synapse 1.26.0rc2 (2021-01-25)

Bugfixes

Fix receipts and account data not being sent down sync. Introduced in v1.26.0rc1. (#9193, #9195)
Fix chain cover update to handle events with duplicate auth events. Introduced in v1.26.0rc1. (#9210)

Internal Changes

Add an oidc- prefix to any idp_ids which are given in the oidc_providers configuration. (#9189)
Bump minimum psycopg2 version to v2.8. (#9204)

Synapse 1.26.0rc1 (2021-01-20)

Features

Add support for multiple SSO Identity Providers. (#9015, #9017, #9036, #9067, #9081, #9082, #9105, #9107, #9109, #9110, #9127, #9153, #9154, #9177)
During user-interactive authentication via single-sign-on, give a better error if the user uses the wrong account on the SSO IdP. (#9091)
Give the public_baseurl a default value, if it is not explicitly set in the configuration file. (#9159)
Improve performance when calculating ignored users in large rooms. (#9024)
Implement MSC2176 in an experimental room version. (#8984)
Add an admin API for protecting local media from quarantine. (#9086)
Remove a user's avatar URL and display name when deactivated with the Admin API. (#8932)
Update /_synapse/admin/v1/users/<user_id>/joined_rooms to work for both local and remote users. (#8948)
Add experimental support for handling to-device messages on worker processes. (#9042, #9043, #9044, #9130)
Add experimental support for handling /keys/claim and /room_keys APIs on worker processes. (#9068)
Add experimental support for handling /devices API on worker processes. (#9092)
Add experimental support for moving off receipts and account data persistence off master. (#9104, #9166)

Bugfixes

Fix a long-standing issue where an internal server error would occur when requesting a profile over federation that did not include a display name / avatar URL. (#9023)
Fix a long-standing bug where some caches could grow larger than configured. (#9028)
Fix error handling during insertion of client IPs into the database. (#9051)
Fix bug where we didn't correctly record CPU time spent in on_new_event block. (#9053)
Fix a minor bug which could cause confusing error messages from invalid configurations. (#9054)
Fix incorrect exit code when there is an error at startup. (#9059)
Fix JSONDecodeError spamming the logs when sending transactions to remote servers. (#9070)
Fix "Failed to send request" errors when a client provides an invalid room alias. (#9071)
Fix bugs in federation catchup logic that caused outbound federation to be delayed for large servers after start up. Introduced in v1.8.0 and v1.21.0. (#9114, #9116)
Fix corruption of pushers data when a postgres bouncer is used. (#9117)
Fix minor bugs in handling the clientRedirectUrl parameter for SSO login. (#9128)
Fix "Unhandled error in Deferred: BodyExceededMaxSize" errors when .well-known files that are too large. (#9108)
Fix "UnboundLocalError: local variable 'length' referenced before assignment" errors when the response body exceeds the expected size. This bug was introduced in v1.25.0. (#9145)
Fix a long-standing bug "ValueError: invalid literal for int() with base 10" when /publicRooms is requested with an invalid server parameter. (#9161)

Improved Documentation

Add some extra docs for getting Synapse running on macOS. (#8997)
Correct a typo in the systemd-with-workers documentation. (#9035)
Correct a typo in INSTALL.md. (#9040)
Add missing user_mapping_provider configuration to the Keycloak OIDC example. Contributed by @chris-ruecker. (#9057)
Quote pip install packages when extras are used to avoid shells interpreting bracket characters. (#9151)

Deprecations and Removals

Remove broken and unmaintained demo/webserver.py script. (#9039)

Internal Changes

Improve efficiency of large state resolutions. (#8868, #9029, #9115, #9118, #9124)
Various clean-ups to the structured logging and logging context code. (#8939)
Ensure rejected events get added to some metadata tables. (#9016)
Ignore date-rotated homeserver logs saved to disk. (#9018)
Remove an unused column from access_tokens table. (#9025)
Add a -noextras factor to tox.ini, to support running the tests with no optional dependencies. (#9030)
Fix running unit tests when optional dependencies are not installed. (#9031)
Allow bumping schema version when using split out state database. (#9033)
Configure the linters to run on a consistent set of files. (#9038)
Various cleanups to device inbox store. (#9041)
Drop unused database tables. (#9055)
Remove unused SynapseService class. (#9058)
Remove unnecessary declarations in the tests for the admin API. (#9063)
Remove SynapseRequest.get_user_agent. (#9069)
Remove redundant Homeserver.get_ip_from_request method. (#9080)
Add type hints to media repository. (#9093)
Fix the wrong arguments being passed to BlacklistingAgentWrapper from MatrixFederationAgent. Contributed by Timothy Leung. (#9098)
Reduce the scope of caught exceptions in BlacklistingAgentWrapper. (#9106)
Improve UsernamePickerTestCase. (#9112)
Remove dependency on distutils. (#9125)
Enforce that replication HTTP clients are called with keyword arguments only. (#9144)
Fix the Python 3.5 / old dependencies build in CI. (#9146)
Replace the old perspectives option in the Synapse docker config file template with trusted_key_servers. (#9157)

Synapse 1.25.0 (2021-01-13)

Ending Support for Python 3.5 and Postgres 9.5

With this release, the Synapse team is announcing a formal deprecation policy for our platform dependencies, like Python and PostgreSQL:

All future releases of Synapse will follow the upstream end-of-life schedules.

Which means:

This is the last release which guarantees support for Python 3.5.
We will end support for PostgreSQL 9.5 early next month.
We will end support for Python 3.6 and PostgreSQL 9.6 near the end of the year.

Crucially, this means we will not produce .deb packages for Debian 9 (Stretch) or Ubuntu 16.04 (Xenial) beyond the transition period described below.

The website https://endoflife.date/ has convenient summaries of the support schedules for projects like Python and PostgreSQL.

If you are unable to upgrade your environment to a supported version of Python or Postgres, we encourage you to consider using the Synapse Docker images instead.

Transition Period

We will make a good faith attempt to avoid breaking compatibility in all releases through the end of March 2021. However, critical security vulnerabilities in dependencies or other unanticipated circumstances may arise which necessitate breaking compatibility earlier.

We intend to continue producing .deb packages for Debian 9 (Stretch) and Ubuntu 16.04 (Xenial) through the transition period.

Removal warning

The old Purge Room API and Shutdown Room API are deprecated and will be removed in a future release. They will be replaced by the Delete Room API.

POST /_synapse/admin/v1/rooms/<room_id>/delete replaces POST /_synapse/admin/v1/purge_room and POST /_synapse/admin/v1/shutdown_room/<room_id>.

Bugfixes

Fix HTTP proxy support when using a proxy that is on a blacklisted IP. Introduced in v1.25.0rc1. Contributed by @Bubu. (#9084)

Synapse 1.25.0rc1 (2021-01-06)

Features

Add an admin API that lets server admins get power in rooms in which local users have power. (#8756)
Add optional HTTP authentication to replication endpoints. (#8853)
Improve the error messages printed as a result of configuration problems for extension modules. (#8874)
Add the number of local devices to Room Details Admin API. Contributed by @dklimpel. (#8886)
Add X-Robots-Tag header to stop web crawlers from indexing media. Contributed by Aaron Raimist. (#8887)
Spam-checkers may now define their methods as async. (#8890)
Add support for allowing users to pick their own user ID during a single-sign-on login. (#8897, #8900, #8911, #8938, #8941, #8942, #8951)
Add an email.invite_client_location configuration option to send a web client location to the invite endpoint on the identity server which allows customisation of the email template. (#8930)
The search term in the list room and list user Admin APIs is now treated as case-insensitive. (#8931)
Apply an IP range blacklist to push and key revocation requests. (#8821, #8870, #8954)
Add an option to allow re-use of user-interactive authentication sessions for a period of time. (#8970)
Allow running the redact endpoint on workers. (#8994)

Bugfixes

Fix bug where we might not correctly calculate the current state for rooms with multiple extremities. (#8827)
Fix a long-standing bug in the register admin endpoint (/_synapse/admin/v1/register) when the mac field was not provided. The endpoint now properly returns a 400 error. Contributed by @edwargix. (#8837)
Fix a long-standing bug on Synapse instances supporting Single-Sign-On, where users would be prompted to enter their password to confirm certain actions, even though they have not set a password. (#8858)
Fix a longstanding bug where a 500 error would be returned if the Content-Length header was not provided to the upload media resource. (#8862)
Add additional validation to pusher URLs to be compliant with the specification. (#8865)
Fix the error code that is returned when a user tries to register on a homeserver on which new-user registration has been disabled. (#8867)
Fix a bug where PUT /_synapse/admin/v2/users/<user_id> failed to create a new user when avatar_url is specified. Bug introduced in Synapse v1.9.0. (#8872)
Fix a 500 error when attempting to preview an empty HTML file. (#8883)
Fix occasional deadlock when handling SIGHUP. (#8918)
Fix login API to not ratelimit application services that have ratelimiting disabled. (#8920)
Fix bug where we ratelimited auto joining of rooms on registration (using auto_join_rooms config). (#8921)
Fix a bug where deactivated users appeared in the user directory when their profile information was updated. (#8933, #8964)
Fix bug introduced in Synapse v1.24.0 which would cause an exception on startup if both enabled and localdb_enabled were set to False in the password_config setting of the configuration file. (#8937)
Fix a bug where 500 errors would be returned if the m.room_history_visibility event had invalid content. (#8945)
Fix a bug causing common English words to not be considered for a user directory search. (#8959)
Fix bug where application services couldn't register new ghost users if the server had reached its MAU limit. (#8962)
Fix a long-standing bug where a m.image event without a url would cause errors on push. (#8965)
Fix a small bug in v2 state resolution algorithm, which could also cause performance issues for rooms with large numbers of power levels. (#8971)
Add validation to the sendToDevice API to raise a missing parameters error instead of a 500 error. (#8975)
Add validation of group IDs to raise a 400 error instead of a 500 eror. (#8977)

Improved Documentation

Fix the "Event persist rate" section of the included grafana dashboard by adding missing prometheus rules. (#8802)
Combine related media admin API docs. (#8839)
Fix an error in the documentation for the SAML username mapping provider. (#8873)
Clarify comments around template directories in sample_config.yaml. (#8891)
Move instructions for database setup, adjusted heading levels and improved syntax highlighting in INSTALL.md. Contributed by @fossterer. (#8987)
Update the example value of group_creation_prefix in the sample configuration. (#8992)
Link the Synapse developer room to the development section in the docs. (#9002)

Deprecations and Removals

Deprecate Shutdown Room and Purge Room Admin APIs. (#8829)

Internal Changes

Properly store the mapping of external ID to Matrix ID for CAS users. (#8856, #8958)
Remove some unnecessary stubbing from unit tests. (#8861)
Remove unused FakeResponse class from unit tests. (#8864)
Pass room_id to get_auth_chain_difference. (#8879)
Add type hints to push module. (#8880, #8882, #8901, #8940, #8943, #9020)
Simplify logic for handling user-interactive-auth via single-sign-on servers. (#8881)
Skip the SAML tests if the requirements (pysaml2 and xmlsec1) aren't available. (#8905)
Fix multiarch docker image builds. (#8906)
Don't publish latest docker image until all archs are built. (#8909)
Various clean-ups to the structured logging and logging context code. (#8916, #8935)
Automatically drop stale forward-extremities under some specific conditions. (#8929)
Refactor test utilities for injecting HTTP requests. (#8946)
Add a maximum size of 50 kilobytes to .well-known lookups. (#8950)
Fix bug in generate_log_config script which made it write empty files. (#8952)
Clean up tox.ini file; disable coverage checking for non-test runs. (#8963)
Add type hints to the admin and room list handlers. (#8973)
Add type hints to the receipts and user directory handlers. (#8976)
Drop the unused local_invites table. (#8979)
Add type hints to the base storage code. (#8980)
Support using PyJWT v2.0.0 in the test suite. (#8986)
Fix tests.federation.transport.RoomDirectoryFederationTests and ensure it runs in CI. (#8998)
Add type hints to the crypto module. (#8999)

Synapse 1.24.0 (2020-12-09)

Due to the two security issues highlighted below, server administrators are encouraged to update Synapse. We are not aware of these vulnerabilities being exploited in the wild.

Security advisory

The following issues are fixed in v1.23.1 and v1.24.0.

There is a denial of service attack (CVE-2020-26257) against the federation APIs in which future events will not be correctly sent to other servers over federation. This affects all servers that participate in open federation. (Fixed in #8776).
Synapse may be affected by OpenSSL CVE-2020-1971. Synapse administrators should ensure that they have the latest versions of the cryptography Python package installed.

To upgrade Synapse along with the cryptography package:

Administrators using the matrix.org Docker image or the Debian/Ubuntu packages from matrix.org should ensure that they have version 1.24.0 or 1.23.1 installed: these images include the updated packages.
Administrators who have installed Synapse from source should upgrade the cryptography package within their virtualenv by running:
```
<path_to_virtualenv>/bin/pip install 'cryptography>=3.3'
```
Administrators who have installed Synapse from distribution packages should consult the information from their distributions.

Internal Changes

Add a maximum version for pysaml2 on Python 3.5. (#8898)

Synapse 1.23.1 (2020-12-09)

Due to the two security issues highlighted below, server administrators are encouraged to update Synapse. We are not aware of these vulnerabilities being exploited in the wild.

Security advisory

The following issues are fixed in v1.23.1 and v1.24.0.

There is a denial of service attack (CVE-2020-26257) against the federation APIs in which future events will not be correctly sent to other servers over federation. This affects all servers that participate in open federation. (Fixed in #8776).
Synapse may be affected by OpenSSL CVE-2020-1971. Synapse administrators should ensure that they have the latest versions of the cryptography Python package installed.

To upgrade Synapse along with the cryptography package:

Administrators using the matrix.org Docker image or the Debian/Ubuntu packages from matrix.org should ensure that they have version 1.24.0 or 1.23.1 installed: these images include the updated packages.
Administrators who have installed Synapse from source should upgrade the cryptography package within their virtualenv by running:
```
<path_to_virtualenv>/bin/pip install 'cryptography>=3.3'
```
Administrators who have installed Synapse from distribution packages should consult the information from their distributions.

Bugfixes

Fix a bug in some federation APIs which could lead to unexpected behaviour if different parameters were set in the URI and the request body. (#8776)

Internal Changes

Add a maximum version for pysaml2 on Python 3.5. (#8898)

Synapse 1.24.0rc2 (2020-12-04)

Bugfixes

Fix a regression in v1.24.0rc1 which failed to allow SAML mapping providers which were unable to redirect users to an additional page. (#8878)

Internal Changes

Add support for the prometheus_client newer than 0.9.0. Contributed by Jordan Bancino. (#8875)

Synapse 1.24.0rc1 (2020-12-02)

Features

Add admin API for logging in as a user. (#8617)
Allow specification of the SAML IdP if the metadata returns multiple IdPs. (#8630)
Add support for re-trying generation of a localpart for OpenID Connect mapping providers. (#8801, #8855)
Allow the Date header through CORS. Contributed by Nicolas Chamo. (#8804)
Add a config option, push.group_by_unread_count, which controls whether unread message counts in push notifications are defined as "the number of rooms with unread messages" or "total unread messages". (#8820)
Add force_purge option to delete-room admin api. (#8843)

Bugfixes

Fix a bug where appservices may be sent an excessive amount of read receipts and presence. Broke in v1.22.0. (#8744)
Fix a bug in some federation APIs which could lead to unexpected behaviour if different parameters were set in the URI and the request body. (#8776)
Fix a bug where synctl could spawn duplicate copies of a worker. Contributed by Waylon Cude. (#8798)
Allow per-room profiles to be used for the server notice user. (#8799)
Fix a bug where logging could break after a call to SIGHUP. (#8817)
Fix register_new_matrix_user failing with "Bad Request" when trailing slash is included in server URL. Contributed by @angdraug. (#8823)
Fix a minor long-standing bug in login, where we would offer the password login type if a custom auth provider supported it, even if password login was disabled. (#8835)
Fix a long-standing bug which caused Synapse to require unspecified parameters during user-interactive authentication. (#8848)
Fix a bug introduced in v1.20.0 where the user-agent and IP address reported during user registration for CAS, OpenID Connect, and SAML were of the wrong form. (#8784)

Improved Documentation

Clarify the usecase for a msisdn delegate. Contributed by Adrian Wannenmacher. (#8734)
Remove extraneous comma from JSON example in User Admin API docs. (#8771)
Update turn-howto.md with troubleshooting notes. (#8779)
Fix the example on how to set the Content-Type header in nginx for the Client Well-Known URI. (#8793)
Improve the documentation for the admin API to list all media in a room with respect to encrypted events. (#8795)
Update the formatting of the push section of the homeserver config file to better align with the code style guidelines. (#8818)
Improve documentation how to configure prometheus for workers. (#8822)
Update example prometheus console. (#8824)

Deprecations and Removals

Remove old /_matrix/client/*/admin endpoints which were deprecated since Synapse 1.20.0. (#8785)
Disable pretty printing JSON responses for curl. Users who want pretty-printed output should use jq in combination with curl. Contributed by @tulir. (#8833)

Internal Changes

Simplify the way the HomeServer object caches its internal attributes. (#8565, #8851)
Add an example and documentation for clock skew to the SAML2 sample configuration to allow for clock/time difference between the homserver and IdP. Contributed by @localguru. (#8731)
Generalise RoomMemberHandler._locally_reject_invite to apply to more flows than just invite. (#8751)
Generalise RoomStore.maybe_store_room_on_invite to handle other, non-invite membership events. (#8754)
Refactor test utilities for injecting HTTP requests. (#8757, #8758, #8759, #8760, #8761, #8777)
Consolidate logic between the OpenID Connect and SAML code. (#8765)
Use TYPE_CHECKING instead of magic MYPY variable. (#8770)
Add a commandline script to sign arbitrary json objects. (#8772)
Minor log line improvements for the SSO mapping code used to generate Matrix IDs from SSO IDs. (#8773)
Add additional error checking for OpenID Connect and SAML mapping providers. (#8774, #8800)
Add type hints to HTTP abstractions. (#8806, #8812)
Remove unnecessary function arguments and add typing to several membership replication classes. (#8809)
Optimise the lookup for an invite from another homeserver when trying to reject it. (#8815)
Add tests for password_auth_providers. (#8819)
Drop redundant database index on event_json. (#8845)
Simplify uk.half-shot.msc2778.login.application_service login handler. (#8847)
Refactor password_auth_provider support code. (#8849)
Add missing ordering to background database updates. (#8850)
Allow for specifying a room version when creating a room in unit tests via RestHelper.create_room_as. (#8854)

Synapse 1.23.0 (2020-11-18)

This release changes the way structured logging is configured. See the upgrade notes for details.

Note: We are aware of a trivially exploitable denial of service vulnerability in versions of Synapse prior to 1.20.0. Complete details will be disclosed on Monday, November 23rd. If you have not upgraded recently, please do so.

Bugfixes

Fix a dependency versioning bug in the Dockerfile that prevented Synapse from starting. (#8767)

Synapse 1.23.0rc1 (2020-11-13)

Features

Add a push rule that highlights when a jitsi conference is created in a room. (#8286)
Add an admin api to delete a single file or files that were not used for a defined time from server. Contributed by @dklimpel. (#8519)
Split admin API for reported events (GET /_synapse/admin/v1/event_reports) into detail and list endpoints. This is a breaking change to #8217 which was introduced in Synapse v1.21.0. Those who already use this API should check their scripts. Contributed by @dklimpel. (#8539)
Support generating structured logs via the standard logging configuration. (#8607, #8685)
Add an admin API to allow server admins to list users' pushers. Contributed by @dklimpel. (#8610, #8689)
Add an admin API GET /_synapse/admin/v1/users/<user_id>/media to get information about uploaded media. Contributed by @dklimpel. (#8647)
Add an admin API for local user media statistics. Contributed by @dklimpel. (#8700)
Add displayname to Shared-Secret Registration for admins. (#8722)

Bugfixes

Fix fetching of E2E cross signing keys over federation when only one of the master key and device signing key is cached already. (#8455)
Fix a bug where Synapse would blindly forward bad responses from federation to clients when retrieving profile information. (#8580)
Fix a bug where the account validity endpoint would silently fail if the user ID did not have an expiration time. It now returns a 400 error. (#8620)
Fix email notifications for invites without local state. (#8627)
Fix handling of invalid group IDs to return a 400 rather than log an exception and return a 500. (#8628)
Fix handling of User-Agent headers that are invalid UTF-8, which caused user agents of users to not get correctly recorded. (#8632)
Fix a bug in the joined_rooms admin API if the user has never joined any rooms. The bug was introduced, along with the API, in v1.21.0. (#8643)
Fix exception during handling multiple concurrent requests for remote media when using multiple media repositories. (#8682)
Fix bug that prevented Synapse from recovering after losing connection to the database. (#8726)
Fix bug where the /_synapse/admin/v1/send_server_notice API could send notices to non-notice rooms. (#8728)
Fix PostgreSQL port script fails when DB has no backfilled events. Broke in v1.21.0. (#8729)
Fix PostgreSQL port script to correctly handle foreign key constraints. Broke in v1.21.0. (#8730)
Fix PostgreSQL port script so that it can be run again after a failure. Broke in v1.21.0. (#8755)

Improved Documentation

Instructions for Azure AD in the OpenID Connect documentation. Contributed by peterk. (#8582)
Improve the sample configuration for single sign-on providers. (#8635)
Fix the filepath of Dex's example config and the link to Dex's Getting Started guide in the OpenID Connect docs. (#8657)
Note support for Python 3.9. (#8665)
Minor updates to docs on running tests. (#8666)
Interlink prometheus/grafana documentation. (#8667)
Notes on SSO logins and media_repository worker. (#8701)
Document experimental support for running multiple event persisters. (#8706)
Add information regarding the various sources of, and expected contributions to, Synapse's documentation to CONTRIBUTING.md. (#8714)
Migrate documentation docs/admin_api/event_reports to markdown. (#8742)
Add some helpful hints to the README for new Synapse developers. Contributed by @chagai95. (#8746)

Internal Changes

Optimise /createRoom with multiple invited users. (#8559)
Implement and use an @lru_cache decorator. (#8595)
Don't instansiate Requester directly. (#8614)
Type hints for RegistrationStore. (#8615)
Change schema to support access tokens belonging to one user but granting access to another. (#8616)
Remove unused OPTIONS handlers. (#8621)
Run mypy as part of the lint.sh script. (#8633)
Correct Synapse's PyPI package name in the OpenID Connect installation instructions. (#8634)
Catch exceptions during initialization of password_providers. Contributed by Nicolai Søborg. (#8636)
Fix typos and spelling errors in the code. (#8639)
Reduce number of OpenTracing spans started. (#8640, #8668, #8670)
Add field total to device list in admin API. (#8644)
Add more type hints to the application services code. (#8655, #8693)
Tell Black to format code for Python 3.5. (#8664)
Don't pull event from DB when handling replication traffic. (#8669)
Abstract some invite-related code in preparation for landing knocking. (#8671, #8688)
Clarify representation of events in logfiles. (#8679)
Don't require hiredis package to be installed to run unit tests. (#8680)
Fix typing info on cache call signature to accept on_invalidate. (#8684)
Fail tests if they do not await coroutines. (#8690)
Improve start time by adding an index to e2e_cross_signing_keys.stream_id. (#8694)
Re-organize the structured logging code to separate the TCP transport handling from the JSON formatting. (#8697)
Use Python 3.8 in Docker images by default. (#8698)
Remove the "draft" status of the Room Details Admin API. (#8702)
Improve the error returned when a non-string displayname or avatar_url is used when updating a user's profile. (#8705)
Block attempts by clients to send server ACLs, or redactions of server ACLs, that would result in the local server being blocked from the room. (#8708)
Add metrics the allow the local sysadmin to track 3PID /requestToken requests. (#8712)
Consolidate duplicated lists of purged tables that are checked in tests. (#8713)
Add some mdui:UIInfo element examples for saml2_config in the homeserver config. (#8718)
Improve the error message returned when a remote server incorrectly sets the Content-Type header in response to a JSON request. (#8719)
Speed up repeated state resolutions on the same room by caching event ID to auth event ID lookups. (#8752)

Synapse 1.22.1 (2020-10-30)

Bugfixes

Fix a bug where an appservice may not be forwarded events for a room it was recently invited to. Broke in v1.22.0. (#8676)
Fix Object of type frozendict is not JSON serializable exceptions when using third-party event rules. Broke in v1.22.0. (#8678)

Synapse 1.22.0 (2020-10-27)

No significant changes.

Synapse 1.22.0rc2 (2020-10-26)

Bugfixes

Fix bugs where ephemeral events were not sent to appservices. Broke in v1.22.0rc1. (#8648, #8656)
Fix user_daily_visits table to not have duplicate rows per user/device due to multiple user agents. Broke in v1.22.0rc1. (#8654)

Synapse 1.22.0rc1 (2020-10-22)

Features

Add a configuration option for always using the "userinfo endpoint" for OpenID Connect. This fixes support for some identity providers, e.g. GitLab. Contributed by Benjamin Koch. (#7658)
Add ability for ThirdPartyEventRules modules to query and manipulate whether a room is in the public rooms directory. (#8292, #8467)
Add support for olm fallback keys (MSC2732). (#8312, #8501)
Add support for running background tasks in a separate worker process. (#8369, #8458, #8489, #8513, #8544, #8599)
Add support for device dehydration (MSC2697). (#8380)
Add support for MSC2409, which allows sending typing, read receipts, and presence events to appservices. (#8437, #8590)
Change default room version to "6", per MSC2788. (#8461)
Add the ability to send non-membership events into a room via the ModuleApi. (#8479)
Increase default upload size limit from 10M to 50M. Contributed by @Akkowicz. (#8502)
Add support for modifying event content in ThirdPartyRules modules. (#8535, #8564)

Bugfixes

Fix a longstanding bug where invalid ignored users in account data could break clients. (#8454)
Fix a bug where backfilling a room with an event that was missing the redacts field would break. (#8457)
Don't attempt to respond to some requests if the client has already disconnected. (#8465)
Fix message duplication if something goes wrong after persisting the event. (#8476)
Fix incremental sync returning an incorrect prev_batch token in timeline section, which when used to paginate returned events that were included in the incremental sync. Broken since v0.16.0. (#8486)
Expose the uk.half-shot.msc2778.login.application_service to clients from the login API. This feature was added in v1.21.0, but was not exposed as a potential login flow. (#8504)
Fix error code for /profile/{userId}/displayname to be M_BAD_JSON. (#8517)
Fix a bug introduced in v1.7.0 that could cause Synapse to insert values from non-state m.room.retention events into the room_retention database table. (#8527)
Fix not sending events over federation when using sharded event writers. (#8536)
Fix a long standing bug where email notifications for encrypted messages were blank. (#8545)
Fix increase in the number of There was no active span... errors logged when using OpenTracing. (#8567)
Fix a bug that prevented errors encountered during execution of the synapse_port_db from being correctly printed. (#8585)
Fix appservice transactions to only include a maximum of 100 persistent and 100 ephemeral events. (#8606)

Updates to the Docker image

Added multi-arch support (arm64,arm/v7) for the docker images. Contributed by @maquis196. (#7921)
Add support for passing commandline args to the synapse process. Contributed by @samuel-p. (#8390)

Improved Documentation

Update the directions for using the manhole with coroutines. (#8462)
Improve readme by adding new shield.io badges. (#8493)
Added note about docker in manhole.md regarding which ip address to bind to. Contributed by @Maquis196. (#8526)
Document the new behaviour of the allowed_lifetime_min and allowed_lifetime_max settings in the room retention configuration. (#8529)

Deprecations and Removals

Drop unused device_max_stream_id table. (#8589)

Internal Changes

Check for unreachable code with mypy. (#8432)
Add unit test for event persister sharding. (#8433)
Allow events to be sent to clients sooner when using sharded event persisters. (#8439, #8488, #8496, #8499)
Configure public_baseurl when using demo scripts. (#8443)
Add SQL logging on queries that happen during startup. (#8448)
Speed up unit tests when using PostgreSQL. (#8450)
Remove redundant database loads of stream_ordering for events we already have. (#8452)
Reduce inconsistencies between codepaths for membership and non-membership events. (#8463)
Combine SpamCheckerApi with the more generic ModuleApi. (#8464)
Additional testing for ThirdPartyEventRules. (#8468)
Add -d option to ./scripts-dev/lint.sh to lint files that have changed since the last git commit. (#8472)
Unblacklist some sytests. (#8474)
Include the log level in the phone home stats. (#8477)
Remove outdated sphinx documentation, scripts and configuration. (#8480)
Clarify error message when plugin config parsers raise an error. (#8492)
Remove the deprecated Handlers object. (#8494)
Fix a threadsafety bug in unit tests. (#8497)
Add user agent to user_daily_visits table. (#8503)
Add type hints to various parts of the code base. (#8407, #8505, #8507, #8547, #8562, #8609)
Remove unused code from the test framework. (#8514)
Apply some internal fixes to the HomeServer class to make its code more idiomatic and statically-verifiable. (#8515)
Factor out common code between RoomMemberHandler._locally_reject_invite and EventCreationHandler.create_event. (#8537)
Improve database performance by executing more queries without starting transactions. (#8542)
Rename Cache to DeferredCache, to better reflect its purpose. (#8548)
Move metric registration code down into LruCache. (#8561, #8591)
Replace DeferredCache with the lighter-weight LruCache where possible. (#8563)
Add virtualenv-generated folders to .gitignore. (#8566)
Add get_immediate method to DeferredCache. (#8568)
Fix mypy not properly checking across the codebase, additionally, fix a typing assertion error in handlers/auth.py. (#8569)
Fix synmark benchmark runner. (#8571)
Modify DeferredCache.get() to return Deferreds instead of ObservableDeferreds. (#8572)
Adjust a protocol-type definition to fit sqlite3 assertions. (#8577)
Support macOS on the synmark benchmark runner. (#8578)
Update mypy static type checker to 0.790. (#8583, #8600)
Re-organize the structured logging code to separate the TCP transport handling from the JSON formatting. (#8587)
Remove extraneous unittest logging decorators from unit tests. (#8592)
Minor optimisations in caching code. (#8593, #8594)

Synapse 1.21.2 (2020-10-15)

Debian packages and Docker images have been rebuilt using the latest versions of dependency libraries, including authlib 0.15.1. Please see bugfixes below.

Security advisory

HTML pages served via Synapse were vulnerable to cross-site scripting (XSS) attacks. All server administrators are encouraged to upgrade. (#8444) (CVE-2020-26891)

This fix was originally included in v1.21.0 but was missing a security advisory.

This was reported by Denis Kasak.

Bugfixes

Fix rare bug where sending an event would fail due to a racey assertion. (#8530)
An updated version of the authlib dependency is included in the Docker and Debian images to fix an issue using OpenID Connect. See #8534 for details.

Synapse 1.21.1 (2020-10-13)

This release fixes a regression in v1.21.0 that prevented debian packages from being built. It is otherwise identical to v1.21.0.

Synapse 1.21.0 (2020-10-12)

No significant changes since v1.21.0rc3.

As noted in v1.20.0, a future release will drop support for accessing Synapse's Admin API under the /_matrix/client/* endpoint prefixes. At that point, the Admin API will only be accessible under /_synapse/admin.

Synapse 1.21.0rc3 (2020-10-08)

Bugfixes

Fix duplication of events on high traffic servers, caused by PostgreSQL could not serialize access due to concurrent update errors. (#8456)

Internal Changes

Add Groovy Gorilla to the list of distributions we build .debs for. (#8475)

Synapse 1.21.0rc2 (2020-10-02)

Features

Convert additional templates from inline HTML to Jinja2 templates. (#8444)

Bugfixes

Fix a regression in v1.21.0rc1 which broke thumbnails of remote media. (#8438)
Do not expose the experimental uk.half-shot.msc2778.login.application_service flow in the login API, which caused a compatibility problem with Element iOS. (#8440)
Fix malformed log line in new federation "catch up" logic. (#8442)
Fix DB query on startup for negative streams which caused long start up times. Introduced in #8374. (#8447)

Synapse 1.21.0rc1 (2020-10-01)

Features

Require the user to confirm that their password should be reset after clicking the email confirmation link. (#8004)
Add an admin API GET /_synapse/admin/v1/event_reports to read entries of table event_reports. Contributed by @dklimpel. (#8217)
Consolidate the SSO error template across all configuration. (#8248, #8405)
Add a configuration option to specify a whitelist of domains that a user can be redirected to after validating their email or phone number. (#8275, #8417)
Add experimental support for sharding event persister. (#8294, #8387, #8396, #8419)
Add the room topic and avatar to the room details admin API. (#8305)
Add an admin API for querying rooms where a user is a member. Contributed by @dklimpel. (#8306)
Add uk.half-shot.msc2778.login.application_service login type to allow appservices to login. (#8320)
Add a configuration option that allows existing users to log in with OpenID Connect. Contributed by @BBBSnowball and @OmmyZhang. (#8345)
Add prometheus metrics for replication requests. (#8406)
Support passing additional single sign-on parameters to the client. (#8413)
Add experimental reporting of metrics on expensive rooms for state-resolution. (#8420)
Add experimental prometheus metric to track numbers of "large" rooms for state resolutiom. (#8425)
Add prometheus metrics to track federation delays. (#8430)

Bugfixes

Fix a bug in the media repository where remote thumbnails with the same size but different crop methods would overwrite each other. Contributed by @deepbluev7. (#7124)
Fix inconsistent handling of non-existent push rules, and stop tracking the enabled state of removed push rules. (#7796)
Fix a longstanding bug when storing a media file with an empty upload_name. (#7905)
Fix messages not being sent over federation until an event is sent into the same room. (#8230, #8247, #8258, #8272, #8322)
Fix a longstanding bug where files that could not be thumbnailed would result in an Internal Server Error. (#8236, #8435)
Upgrade minimum version of canonicaljson to version 1.4.0, to fix an unicode encoding issue. (#8262)
Fix longstanding bug which could lead to incomplete database upgrades on SQLite. (#8265)
Fix stack overflow when stderr is redirected to the logging system, and the logging system encounters an error. (#8268)
Fix a bug which cause the logging system to report errors, if DEBUG was enabled and no context filter was applied. (#8278)
Fix edge case where push could get delayed for a user until a later event was pushed. (#8287)
Fix fetching malformed events from remote servers. (#8324)
Fix UnboundLocalError from occuring when appservices send a malformed register request. (#8329)
Don't send push notifications to expired user accounts. (#8353)
Fix a regression in v1.19.0 with reactivating users through the admin API. (#8362)
Fix a bug where during device registration the length of the device name wasn't limited. (#8364)
Include guest_access in the fields that are checked for null bytes when updating room_stats_state. Broke in v1.7.2. (#8373)
Fix theoretical race condition where events are not sent down /sync if the synchrotron worker is restarted without restarting other workers. (#8374)
Fix a bug which could cause errors in rooms with malformed membership events, on servers using sqlite. (#8385)
Fix "Re-starting finished log context" warning when receiving an event we already had over federation. (#8398)
Fix incorrect handling of timeouts on outgoing HTTP requests. (#8400)
Fix a regression in v1.20.0 in the synapse_port_db script regarding the ui_auth_sessions_ips table. (#8410)
Remove unnecessary 3PID registration check when resetting password via an email address. Bug introduced in v0.34.0rc2. (#8414)

Improved Documentation

Add /_synapse/client to the reverse proxy documentation. (#8227)
Add note to the reverse proxy settings documentation about disabling Apache's mod_security2. Contributed by Julian Fietkau (@jfietkau). (#8375)
Improve description of server_name config option in homserver.yaml. (#8415)

Deprecations and Removals

Drop support for prometheus_client older than 0.4.0. (#8426)

Internal Changes

Fix tests on distros which disable TLSv1.0. Contributed by @danc86. (#8208)
Simplify the distributor code to avoid unnecessary work. (#8216)
Remove the populate_stats_process_rooms_2 background job and restore functionality to populate_stats_process_rooms. (#8243)
Clean up type hints for PaginationConfig. (#8250, #8282)
Track the latest event for every destination and room for catch-up after federation outage. (#8256)
Fix non-user visible bug in implementation of MultiWriterIdGenerator.get_current_token_for_writer. (#8257)
Switch to the JSON implementation from the standard library. (#8259)
Add type hints to synapse.util.async_helpers. (#8260)
Simplify tests that mock asynchronous functions. (#8261)
Add type hints to StreamToken and RoomStreamToken classes. (#8279)
Change StreamToken.room_key to be a RoomStreamToken instance. (#8281)
Refactor notifier code to correctly use the max event stream position. (#8288)
Use slotted classes where possible. (#8296)
Support testing the local Synapse checkout against the Complement homeserver test suite. (#8317)
Update outdated usages of metaclass to python 3 syntax. (#8326)
Move lint-related dependencies to package-extra field, update CONTRIBUTING.md to utilise this. (#8330, #8377)
Use the admin_patterns helper in additional locations. (#8331)
Fix test logging to allow braces in log output. (#8335)
Remove __future__ imports related to Python 2 compatibility. (#8337)
Simplify super() calls to Python 3 syntax. (#8344)
Fix bad merge from release-v1.20.0 branch to develop. (#8354)
Factor out a _send_dummy_event_for_room method. (#8370)
Improve logging of state resolution. (#8371)
Add type annotations to SimpleHttpClient. (#8372)
Refactor ID generators to use async with syntax. (#8383)
Add EventStreamPosition type. (#8388)
Create a mechanism for marking tests "logcontext clean". (#8399)
A pair of tiny cleanups in the federation request code. (#8401)
Add checks on startup that PostgreSQL sequences are consistent with their associated tables. (#8402)
Do not include appservice users when calculating the total MAU for a server. (#8404)
Typing fixes for synapse.handlers.federation. (#8422)
Various refactors to simplify stream token handling. (#8423)
Make stream token serializing/deserializing async. (#8427)

Synapse 1.20.1 (2020-09-24)

Bugfixes

Fix a bug introduced in v1.20.0 which caused the synapse_port_db script to fail. (#8386)
Fix a bug introduced in v1.20.0 which caused variables to be incorrectly escaped in Jinja2 templates. (#8394)

Synapse 1.20.0 (2020-09-22)

No significant changes since v1.20.0rc5.

Removal warning

Historically, the Synapse Admin API has been accessible under the /_matrix/client/api/v1/admin, /_matrix/client/unstable/admin, /_matrix/client/r0/admin and /_synapse/admin prefixes. In a future release, we will be dropping support for accessing Synapse's Admin API using the /_matrix/client/* prefixes.

From that point, the Admin API will only be accessible under /_synapse/admin. This makes it easier for homeserver admins to lock down external access to the Admin API endpoints.

Synapse 1.20.0rc5 (2020-09-18)

In addition to the below, Synapse 1.20.0rc5 also includes the bug fix that was included in 1.19.3.

Features

Add flags to the /versions endpoint for whether new rooms default to using E2EE. (#8343)

Bugfixes

Fix rate limiting of federation /send requests. (#8342)
Fix a longstanding bug where back pagination over federation could get stuck if it failed to handle a received event. (#8349)

Internal Changes

Blacklist MSC2753 SyTests until it is implemented. (#8285)

Synapse 1.19.3 (2020-09-18)

Bugfixes

Partially mitigate bug where newly joined servers couldn't get past events in a room when there is a malformed event. (#8350)

Synapse 1.20.0rc4 (2020-09-16)

Synapse 1.20.0rc4 is identical to 1.20.0rc3, with the addition of the security fix that was included in 1.19.2.

Synapse 1.19.2 (2020-09-16)

Due to the issue below server admins are encouraged to upgrade as soon as possible.

Bugfixes

Fix joining rooms over federation that include malformed events. (#8324)

Synapse 1.20.0rc3 (2020-09-11)

Bugfixes

Fix a bug introduced in v1.20.0rc1 where the wrong exception was raised when invalid JSON data is encountered. (#8291)

Synapse 1.20.0rc2 (2020-09-09)

Bugfixes

Fix a bug introduced in v1.20.0rc1 causing some features related to notifications to misbehave following the implementation of unread counts. (#8280)

Synapse 1.20.0rc1 (2020-09-08)

Removal warning

Some older clients used a disallowed character (:) in the client_secret parameter of various endpoints. The incorrect behaviour was allowed for backwards compatibility, but is now being removed from Synapse as most users have updated their client. Further context can be found at #6766.

Features

Add an endpoint to query your shared rooms with another user as an implementation of MSC2666. (#7785)
Iteratively encode JSON to avoid blocking the reactor. (#8013, #8116)
Add support for shadow-banning users (ignoring any message send requests). (#8034, #8092, #8095, #8142, #8152, #8157, #8158, #8176)
Use the default template file when its equivalent is not found in a custom template directory. (#8037, #8107, #8252)
Add unread messages count to sync responses, as specified in MSC2654. (#8059, #8254, #8270, #8274)
Optimise /federation/v1/user/devices/ API by only returning devices with encryption keys. (#8198)

Bugfixes

Fix a memory leak by limiting the length of time that messages will be queued for a remote server that has been unreachable. (#7864)
Fix Re-starting finished log context PUT-nnnn warning when event persistence failed. (#8081)
Synapse now correctly enforces the valid characters in the client_secret parameter used in various endpoints. (#8101)
Fix a bug introduced in v1.7.2 impacting message retention policies that would allow federated homeservers to dictate a retention period that's lower than the configured minimum allowed duration in the configuration file. (#8104)
Fix a long-standing bug where invalid JSON would be accepted by Synapse. (#8106)
Fix a bug introduced in Synapse v1.12.0 which could cause /sync requests to fail with a 404 if you had a very old outstanding room invite. (#8110)
Return a proper error code when the rooms of an invalid group are requested. (#8129)
Fix a bug which could cause a leaked postgres connection if synapse was set to daemonize. (#8131)
Clarify the error code if a user tries to register with a numeric ID. This bug was introduced in v1.15.0. (#8135)
Fix a bug where appservices with ratelimiting disabled would still be ratelimited when joining rooms. This bug was introduced in v1.19.0. (#8139)
Fix logging in via OpenID Connect with a provider that uses integer user IDs. (#8190)
Fix a longstanding bug where user directory updates could break when unexpected profile data was included in events. (#8223)
Fix a longstanding bug where stats updates could break when unexpected profile data was included in events. (#8226)
Fix slow start times for large servers by removing a table scan of the users table from startup code. (#8271)

Updates to the Docker image

Fix builds of the Docker image on non-x86 platforms. (#8144)
Added curl for healthcheck support and readme updates for the change. Contributed by @maquis196. (#8147)

Improved Documentation

Link to matrix-synapse-rest-password-provider in the password provider documentation. (#8111)
Updated documentation to note that Synapse does not follow HTTP 308 redirects due to an upstream library not supporting them. Contributed by Ryan Cole. (#8120)
Explain better what GDPR-erased means when deactivating a user. (#8189)

Internal Changes

Add filter name to the /users admin API, which filters by user ID or displayname. Contributed by Awesome Technologies Innovationslabor GmbH. (#7377, #8163)
Reduce run times of some unit tests by advancing the reactor a fewer number of times. (#7757)
Don't fail /submit_token requests on incorrect session ID if request_token_inhibit_3pid_errors is turned on. (#7991)
Convert various parts of the codebase to async/await. (#8071, #8072, #8074, #8075, #8076, #8087, #8100, #8119, #8121, #8133, #8156, #8162, #8166, #8168, #8173, #8191, #8192, #8193, #8194, #8195, #8197, #8199, #8200, #8201, #8202, #8207, #8213, #8214)
Remove some unused database functions. (#8085)
Add type hints to various parts of the codebase. (#8090, #8127, #8187, #8241, #8140, #8183, #8232, #8235, #8237, #8244)
Return the previous stream token if a non-member event is a duplicate. (#8093, #8112)
Separate get_current_token into two since there are two different use cases for it. (#8113)
Remove ChainedIdGenerator. (#8123)
Reduce the amount of whitespace in JSON stored and sent in responses. (#8124)
Update the test federation client to handle streaming responses. (#8130)
Micro-optimisations to get_auth_chain_ids. (#8132)
Refactor StreamIdGenerator and MultiWriterIdGenerator to have the same interface. (#8161)
Add functions to MultiWriterIdGen used by events stream. (#8164, #8179)
Fix tests that were broken due to the merge of 1.19.1. (#8167)
Make SlavedIdTracker.advance have the same interface as MultiWriterIDGenerator. (#8171)
Remove unused is_guest parameter from, and add safeguard to, MessageHandler.get_room_data. (#8174, #8181)
Standardize the mypy configuration. (#8175)
Refactor some of LoginRestServlet's helper methods, and move them to AuthHandler for easier reuse. (#8182)
Fix wait_for_stream_position to allow multiple waiters on same stream ID. (#8196)
Make MultiWriterIDGenerator work for streams that use negative values. (#8203)
Refactor queries for device keys and cross-signatures. (#8204, #8205, #8222, #8224, #8225, #8231, #8233, #8234)
Fix type hints for functions decorated with @cached. (#8240)
Remove obsolete order field from federation send queues. (#8245)
Stop sub-classing from object. (#8249)
Add more logging to debug slow startup. (#8264)
Do not attempt to upgrade database schema on worker processes. (#8266, #8276)

Synapse 1.19.1 (2020-08-27)

No significant changes.

Synapse 1.19.1rc1 (2020-08-25)

Bugfixes

Fix a bug introduced in v1.19.0 where appservices with ratelimiting disabled would still be ratelimited when joining rooms. (#8139)
Fix a bug introduced in v1.19.0 that would cause e.g. profile updates to fail due to incorrect application of rate limits on join requests. (#8153)

Synapse 1.19.0 (2020-08-17)

No significant changes since 1.19.0rc1.

Removal warning

As outlined in the previous release, we are no longer publishing Docker images with the -py3 tag suffix. On top of that, we have also removed the latest-py3 tag. Please see the announcement in the upgrade notes for 1.18.0.

Synapse 1.19.0rc1 (2020-08-13)

Features

Add option to allow server admins to join rooms which fail complexity checks. Contributed by @lugino-emeritus. (#7902)
Add an option to purge room or not with delete room admin endpoint (POST /_synapse/admin/v1/rooms/<room_id>/delete). Contributed by @dklimpel. (#7964)
Add rate limiting to users joining rooms. (#8008)
Add a /health endpoint to every configured HTTP listener that can be used as a health check endpoint by load balancers. (#8048)
Allow login to be blocked based on the values of SAML attributes. (#8052)
Allow guest access to the GET /_matrix/client/r0/rooms/{room_id}/members endpoint, according to MSC2689. Contributed by Awesome Technologies Innovationslabor GmbH. (#7314)

Bugfixes

Fix a bug introduced in Synapse v1.7.2 which caused inaccurate membership counts in the room directory. (#7977)
Fix a long standing bug: 'Duplicate key value violates unique constraint "event_relations_id"' when message retention is configured. (#7978)
Fix "no create event in auth events" when trying to reject invitation after inviter leaves. Bug introduced in Synapse v1.10.0. (#7980)
Fix various comments and minor discrepencies in server notices code. (#7996)
Fix a long standing bug where HTTP HEAD requests resulted in a 400 error. (#7999)
Fix a long-standing bug which caused two copies of some log lines to be written when synctl was used along with a MemoryHandler logger. (#8011, #8012)

Updates to the Docker image

We no longer publish Docker images with the -py3 tag suffix, as announced in the upgrade notes. (#8056)

Improved Documentation

Document how to set up a client .well-known file and fix several pieces of outdated documentation. (#7899)
Improve workers docs. (#7990, #8000)
Fix typo in docs/workers.md. (#7992)
Add documentation for how to undo a room shutdown. (#7998, #8010)

Internal Changes

Reduce the amount of whitespace in JSON stored and sent in responses. Contributed by David Vo. (#7372)
Switch to the JSON implementation from the standard library and bump the minimum version of the canonicaljson library to 1.2.0. (#7936, #7979)
Convert various parts of the codebase to async/await. (#7947, #7948, #7949, #7951, #7963, #7973, #7975, #7976, #7981, #7987, #7989, #8003, #8014, #8016, #8027, #8031, #8032, #8035, #8042, #8044, #8045, #8061, #8062, #8063, #8066, #8069, #8070)
Move some database-related log lines from the default logger to the database/transaction loggers. (#7952)
Add a script to detect source code files using non-unix line terminators. (#7965, #7970)
Log the SAML session ID during creation. (#7971)
Implement new experimental push rules for some users. (#7997)
Remove redundant and unreliable signature check for v1 Identity Service lookup responses. (#8001)
Improve the performance of the register endpoint. (#8009)
Reduce less useful output in the newsfragment CI step. Add a link to the changelog section of the contributing guide on error. (#8024)
Rename storage layer objects to be more sensible. (#8033)
Change the default log config to reduce disk I/O and storage for new servers. (#8040)
Add an assertion on prev_events in create_new_client_event. (#8041)
Add a comment to ServerContextFactory about the use of SSLv23_METHOD. (#8043)
Log OPTIONS requests at DEBUG rather than INFO level to reduce amount logged at INFO. (#8049)
Reduce amount of outbound request logging at INFO level. (#8050)
It is no longer necessary to explicitly define filters in the logging configuration. (Continuing to do so is redundant but harmless.) (#8051)
Add and improve type hints. (#8058, #8064, #8060, #8067)

Synapse 1.18.0 (2020-07-30)

Deprecation Warnings

Docker Tags with `-py3` Suffix

From 10th August 2020, we will no longer publish Docker images with the -py3 tag suffix. The images tagged with the -py3 suffix have been identical to the non-suffixed tags since release 0.99.0, and the suffix is obsolete.

On 10th August, we will remove the latest-py3 tag. Existing per-release tags (such as v1.18.0-py3) will not be removed, but no new -py3 tags will be added.

Scripts relying on the -py3 suffix will need to be updated.

TCP-based Replication

When setting up worker processes, we now recommend the use of a Redis server for replication. The old direct TCP connection method is deprecated and will be removed in a future release. See docs/workers.md for more details.

Improved Documentation

Update worker docs with latest enhancements. (#7969)

Synapse 1.18.0rc2 (2020-07-28)

Bugfixes

Fix an AssertionError exception introduced in v1.18.0rc1. (#7876)
Fix experimental support for moving typing off master when worker is restarted, which is broken in v1.18.0rc1. (#7967)

Internal Changes

Further optimise queueing of inbound replication commands. (#7876)

Synapse 1.18.0rc1 (2020-07-27)

Features

Include room states on invite events that are sent to application services. Contributed by @Sorunome. (#6455)
Add delete room admin endpoint (POST /_synapse/admin/v1/rooms/<room_id>/delete). Contributed by @dklimpel. (#7613, #7953)
Add experimental support for running multiple federation sender processes. (#7798)
Add the option to validate the iss and aud claims for JWT logins. (#7827)
Add support for handling registration requests across multiple client reader workers. (#7830)
Add an admin API to list the users in a room. Contributed by Awesome Technologies Innovationslabor GmbH. (#7842)
Allow email subjects to be customised through Synapse's configuration. (#7846)
Add the ability to re-activate an account from the admin API. (#7847, #7908)
Add experimental support for running multiple pusher workers. (#7855)
Add experimental support for moving typing off master. (#7869, #7959)
Report CPU metrics to prometheus for time spent processing replication commands. (#7879)
Support oEmbed for media previews. (#7920)
Abort federation requests where the client disconnects before the ratelimiter expires. (#7930)
Cache responses to /_matrix/federation/v1/state_ids to reduce duplicated work. (#7931)

Bugfixes

Fix detection of out of sync remote device lists when receiving events from remote users. (#7815)
Fix bug where Synapse fails to process an incoming event over federation if the server is missing too much of the event's auth chain. (#7817)
Fix a bug causing Synapse to misinterpret the value off for encryption_enabled_by_default_for_room_type in its configuration file(s) if that value isn't surrounded by quotes. This bug was introduced in v1.16.0. (#7822)
Fix bug where we did not always pass in app_name or server_name to email templates, including e.g. for registration emails. (#7829)
Errors which occur while using the non-standard JWT login now return the proper error: 403 Forbidden with an error code of M_FORBIDDEN. (#7844)
Fix "AttributeError: 'str' object has no attribute 'get'" error message when applying per-room message retention policies. The bug was introduced in Synapse 1.7.0. (#7850)
Fix a bug introduced in Synapse 1.10.0 which could cause a "no create event in auth events" error during room creation. (#7854)
Fix a bug which allowed empty rooms to be rejoined over federation. (#7859)
Fix 'Unable to find a suitable guest user ID' error when using multiple client_reader workers. (#7866)
Fix a long standing bug where the tracing of async functions with opentracing was broken. (#7872, #7961)
Fix "TypeError in synapse.notifier" exceptions. (#7880)
Fix deprecation warning due to invalid escape sequences. (#7895)

Updates to the Docker image

Base docker image on Debian Buster rather than Alpine Linux. Contributed by @maquis196. (#7839)

Improved Documentation

Provide instructions on using register_new_matrix_user via docker. (#7885)
Change the sample config postgres user section to use synapse_user instead of synapse to align with the documentation. (#7889)
Reorder database paragraphs to promote postgres over sqlite. (#7933)
Update the dates of ACME v1's end of life in ACME.md. (#7934)

Deprecations and Removals

Remove unused synapse_replication_tcp_resource_invalidate_cache prometheus metric. (#7878)
Remove Ubuntu Eoan from the list of .deb packages that we build as it is now end-of-life. Contributed by @gary-kim. (#7888)

Internal Changes

Switch parts of the codebase from simplejson to the standard library json. (#7802)
Add type hints to the http server code and remove an unused parameter. (#7813)
Add type hints to synapse.api.errors module. (#7820)
Ensure that calls to json.dumps are compatible with the standard library json. (#7836)
Remove redundant retry_on_integrity_error wrapper for event persistence code. (#7848)
Consistently use db_to_json to convert from database values to JSON objects. (#7849)
Convert various parts of the codebase to async/await. (#7851, #7860, #7868, #7871, #7873, #7874, #7884, #7912, #7935, #7939, #7942, #7944)
Add support for handling registration requests across multiple client reader workers. (#7853)
Small performance improvement in typing processing. (#7856)
The default value of filter_timeline_limit was changed from -1 (no limit) to 100. (#7858)
Optimise queueing of inbound replication commands. (#7861)
Add some type annotations to HomeServer and BaseHandler. (#7870)
Clean up PreserveLoggingContext. (#7877)
Change "unknown room version" logging from 'error' to 'warning'. (#7881)
Stop using device_max_stream_id table and just use device_inbox.stream_id. (#7882)
Return an empty body for OPTIONS requests. (#7886)
Fix typo in generated config file. Contributed by @ThiefMaster. (#7890)
Import ABC from collections.abc for Python 3.10 compatibility. (#7892)
Remove unused functions time_function, trace_function, get_previous_frames and get_previous_frame from synapse.logging.utils module. (#7897)
Lint the contrib/ directory in CI and linting scripts, add synctl to the linting script for consistency with CI. (#7914)
Use Element CSS and logo in notification emails when app name is Element. (#7919)
Optimisation to /sync handling: skip serializing the response if the client has already disconnected. (#7927)
When a client disconnects, don't log it as 'Error processing request'. (#7928)
Add debugging to /sync response generation (disabled by default). (#7929)
Update comments that refer to Deferreds for async functions. (#7945)
Simplify error handling in federation handler. (#7950)

Synapse 1.17.0 (2020-07-13)

Synapse 1.17.0 is identical to 1.17.0rc1, with the addition of the fix that was included in 1.16.1.

Synapse 1.16.1 (2020-07-10)

In some distributions of Synapse 1.16.0, we incorrectly included a database migration which added a new, unused table. This release removes the redundant table.

Bugfixes

Drop table local_rejections_stream which was incorrectly added in Synapse 1.16.0. (#7816, b1beb3ff5)

Synapse 1.17.0rc1 (2020-07-09)

Bugfixes

Fix inconsistent handling of upper and lower case in email addresses when used as identifiers for login, etc. Contributed by @dklimpel. (#7021)
Fix "Tried to close a non-active scope!" error messages when opentracing is enabled. (#7732)
Fix incorrect error message when database CTYPE was set incorrectly. (#7760)
Fix to not ignore set_tweak actions in Push Rules that have no value, as permitted by the specification. (#7766)
Fix synctl to handle empty config files correctly. Contributed by @kotovalexarian. (#7779)
Fixes a long standing bug in worker mode where worker information was saved in the devices table instead of the original IP address and user agent. (#7797)
Fix 'stuck invites' which happen when we are unable to reject a room invite received over federation. (#7804, #7809, #7810)

Updates to the Docker image

Include libwebp in the Docker file to properly handle webp image uploads. (#7791)

Improved Documentation

Improve the documentation of the non-standard JSON web token login type. (#7776)
Update doc links for caddy. Contributed by Nicolai Søborg. (#7789)

Internal Changes

Refactor getting replication updates from database. (#7740)
Send push notifications with a high or low priority depending upon whether they may generate user-observable effects. (#7765)
Use symbolic names for replication stream names. (#7768)
Add early returns to _check_for_soft_fail. (#7769)
Fix up synapse.handlers.federation to pass mypy. (#7770)
Convert the appserver handler to async/await. (#7775)
Allow to use higher versions of prometheus_client <0.9.0 which are expected to introduce no breaking changes. Contributed by Oliver Kurz. (#7780)
Update linting scripts and codebase to be compatible with isort v5. (#7786)
Stop populating unused table local_invites. (#7793)
Ensure that strings (not bytes) are passed into JSON serialization. (#7799)
Switch from simplejson to the standard library json. (#7800)
Add signing_key property to HomeServer to save code duplication. (#7805)
Improve stacktraces from exceptions in background processes. (#7808)
Fix various spelling errors in comments and log lines. (#7811)

Synapse 1.16.0 (2020-07-08)

No significant changes since 1.16.0rc2.

Note that this release deprecates the m.login.jwt login method, renaming it to org.matrix.login.jwt, as m.login.jwt is not part of the Matrix spec. Otherwise the behaviour is identical. Synapse will accept both names for now, but this may change in a future release.

Synapse 1.16.0rc2 (2020-07-02)

Synapse 1.16.0rc2 includes the security fixes released with Synapse 1.15.2. Please see below for more details.

Improved Documentation

Update postgres image in example docker-compose.yaml to tag 12-alpine. (#7696)

Internal Changes

Add some metrics for inbound and outbound federation latencies: synapse_federation_server_pdu_process_time and synapse_event_processing_lag_by_event. (#7771)

Synapse 1.15.2 (2020-07-02)

Due to the two security issues highlighted below, server administrators are encouraged to update Synapse. We are not aware of these vulnerabilities being exploited in the wild.

Security advisory

A malicious homeserver could force Synapse to reset the state in a room to a small subset of the correct state. This affects all Synapse deployments which federate with untrusted servers. (96e9afe6)
HTML pages served via Synapse were vulnerable to clickjacking attacks. This predominantly affects homeservers with single-sign-on enabled, but all server administrators are encouraged to upgrade. (ea26e9a9)

This was reported by Quentin Gliech.

Synapse 1.16.0rc1 (2020-07-01)

Features

Add an option to enable encryption by default for new rooms. (#7639)
Add support for running multiple media repository workers. See docs/workers.md for instructions. (#7706)
Media can now be marked as safe from quarantined. (#7718)
Expand the configuration options for auto-join rooms. (#7763)

Bugfixes

Remove user_id from the response to GET /_matrix/client/r0/presence/{userId}/status to match the specification. (#7606)
In worker mode, ensure that replicated data has not already been received. (#7648)
Fix intermittent exception during startup, introduced in Synapse 1.14.0. (#7663)
Include a user-agent for federation and well-known requests. (#7677)
Accept the proper field (phone) for the m.id.phone identifier type. The legacy field of number is still accepted as a fallback. Bug introduced in v0.20.0. (#7687)
Fix "Starting db txn 'get_completed_ui_auth_stages' from sentinel context" warning. The bug was introduced in 1.13.0. (#7688)
Compare the URI and method during user interactive authentication (instead of the URI twice). Bug introduced in 1.13.0. (#7689)
Fix a long standing bug where the response to the GET room_keys/version endpoint had the incorrect type for the etag field. (#7691)
Fix logged error during device resync in opentracing. Broke in v1.14.0. (#7698)
Do not break push rule evaluation when receiving an event with a non-string body. This is a long-standing bug. (#7701)
Fixs a long standing bug which resulted in an exception: "TypeError: argument of type 'ObservableDeferred' is not iterable". (#7708)
The synapse_port_db script no longer fails when the ui_auth_sessions table is non-empty. This bug has existed since v1.13.0. (#7711)
Synapse will now fetch media from the proper specified URL (using the r0 prefix instead of the unspecified v1). (#7714)
Fix the tables ignored by synapse_port_db to be in sync the current database schema. (#7717)
Fix missing Content-Length on HTTP responses from the metrics handler. (#7730)
Fix large state resolutions from stalling Synapse for seconds at a time. (#7735, #7746)

Improved Documentation

Spelling correction in sample_config.yaml. (#7652)
Added instructions for how to use Keycloak via OpenID Connect to authenticate with Synapse. (#7659)
Corrected misspelling of PostgreSQL. (#7724)

Deprecations and Removals

Deprecate m.login.jwt login method in favour of org.matrix.login.jwt, as m.login.jwt is not part of the Matrix spec. (#7675)

Internal Changes

Refactor getting replication updates from database. (#7636)
Clean-up the login fallback code. (#7657)
Increase the default SAML session expiry time to 15 minutes. (#7664)
Convert the device message and pagination handlers to async/await. (#7678)
Convert typing handler to async/await. (#7679)
Require parameterized package version to be at least 0.7.0. (#7680)
Refactor handling of listeners configuration settings. (#7681)
Replace uses of six.iterkeys/iteritems/itervalues with keys()/items()/values(). (#7692)
Add support for using rust-python-jaeger-reporter library to reduce jaeger tracing overhead. (#7697)
Make Tox actions work on Debian 10. (#7703)
Replace all remaining uses of six with native Python 3 equivalents. Contributed by @ilmari. (#7704)
Fix broken link in sample config. (#7712)
Speed up state res v2 across large state differences. (#7725)
Convert directory handler to async/await. (#7727)
Move flake8 to the end of scripts-dev/lint.sh as it takes the longest and could cause the script to exit early. (#7738)
Explain the "test" conditional requirement for dependencies is not all of the modules necessary to run the unit tests. (#7751)
Add some metrics for inbound and outbound federation latencies: synapse_federation_server_pdu_process_time and synapse_event_processing_lag_by_event. (#7755)

Synapse 1.15.1 (2020-06-16)

Bugfixes

Fix a bug introduced in v1.15.0 that would crash Synapse on start when using certain password auth providers. (#7684)
Fix a bug introduced in v1.15.0 which meant that some 3PID management endpoints were not accessible on the correct URL. (#7685)

Synapse 1.15.0 (2020-06-11)

No significant changes.

Synapse 1.15.0rc1 (2020-06-09)

Features

Advertise support for Client-Server API r0.6.0 and remove related unstable feature flags. (#6585)
Add an option to disable autojoining rooms for guest accounts. (#6637)
For SAML authentication, add the ability to pass email addresses to be added to new users' accounts via SAML attributes. Contributed by Christopher Cooper. (#7385)
Add admin APIs to allow server admins to manage users' devices. Contributed by @dklimpel. (#7481)
Add support for generating thumbnails for WebP images. Previously, users would see an empty box instead of preview image. Contributed by @WGH-. (#7586)
Support the standardized m.login.sso user-interactive authentication flow. (#7630)

Bugfixes

Allow new users to be registered via the admin API even if the monthly active user limit has been reached. Contributed by @dklimpel. (#7263)
Fix email notifications not being enabled for new users when created via the Admin API. (#7267)
Fix str placeholders in an instance of PrepareDatabaseException. Introduced in Synapse v1.8.0. (#7575)
Fix a bug in automatic user creation during first time login with m.login.jwt. Regression in v1.6.0. Contributed by @olof. (#7585)
Fix a bug causing the cross-signing keys to be ignored when resyncing a device list. (#7594)
Fix metrics failing when there is a large number of active background processes. (#7597)
Fix bug where returning rooms for a group would fail if it included a room that the server was not in. (#7599)
Fix duplicate key violation when persisting read markers. (#7607)
Prevent an entire iteration of the device list resync loop from failing if one server responds with a malformed result. (#7609)
Fix exceptions when fetching events from a remote host fails. (#7622)
Make synctl restart start synapse if it wasn't running. (#7624)
Pass device information through to the login endpoint when using the login fallback. (#7629)
Advertise the m.login.token login flow when OpenID Connect is enabled. (#7631)
Fix bug in account data replication stream. (#7656)

Improved Documentation

Update the OpenBSD installation instructions. (#7587)
Advertise Python 3.8 support in setup.py. (#7602)
Add a link to #synapse:matrix.org in the troubleshooting section of the README. (#7603)
Clarifications to the admin api documentation. (#7647)

Internal Changes

Convert the identity handler to async/await. (#7561)
Improve query performance for fetching state from a PostgreSQL database. Contributed by @ilmari. (#7567)
Speed up processing of federation stream RDATA rows. (#7584)
Add comment to systemd example to show postgresql dependency. (#7591)
Refactor Ratelimiter to limit the amount of expensive config value accesses. (#7595)
Convert groups handlers to async/await. (#7600)
Clean up exception handling in SAML2ResponseResource. (#7614)
Check that all asynchronous tasks succeed and general cleanup of MonthlyActiveUsersTestCase and TestMauLimit. (#7619)
Convert get_user_id_by_threepid to async/await. (#7620)
Switch to upstream dh-virtualenv rather than our fork for Debian package builds. (#7621)
Update CI scripts to check the number in the newsfile fragment. (#7623)
Check if the localpart of a Matrix ID is reserved for guest users earlier in the registration flow, as well as when responding to requests to /register/available. (#7625)
Minor cleanups to OpenID Connect integration. (#7628)
Attempt to fix flaky test: PhoneHomeStatsTestCase.test_performance_100. (#7634)
Fix typos of m.olm.curve25519-aes-sha2 and m.megolm.v1.aes-sha2 in comments, test files. (#7637)
Convert user directory, state deltas, and stats handlers to async/await. (#7640)
Remove some unused constants. (#7644)
Fix type information on assert_*_is_admin methods. (#7645)
Convert registration handler to async/await. (#7649)

Synapse 1.14.0 (2020-05-28)

No significant changes.

Synapse 1.14.0rc2 (2020-05-27)

Bugfixes

Fix cache config to not apply cache factor to event cache. Regression in v1.14.0rc1. (#7578)
Fix bug where ReplicationStreamer was not always started when replication was enabled. Bug introduced in v1.14.0rc1. (#7579)
Fix specifying individual cache factors for caches with special characters in their name. Regression in v1.14.0rc1. (#7580)

Improved Documentation

Fix the OIDC client_auth_method value in the sample config. (#7581)

Synapse 1.14.0rc1 (2020-05-26)

Features

Synapse's cache factor can now be configured in homeserver.yaml by the caches.global_factor setting. Additionally, caches.per_cache_factors controls the cache factors for individual caches. (#6391)
Add OpenID Connect login/registration support. Contributed by Quentin Gliech, on behalf of les Connecteurs. (#7256, #7457)
Add room details admin endpoint. Contributed by Awesome Technologies Innovationslabor GmbH. (#7317)
Allow for using more than one spam checker module at once. (#7435)
Add additional authentication checks for m.room.power_levels event per MSC2209. (#7502)
Implement room version 6 per MSC2240. (#7506)
Add highly experimental option to move event persistence off master. (#7281, #7374, #7436, #7440, #7475, #7490, #7491, #7492, #7493, #7495, #7515, #7516, #7517, #7542)

Bugfixes

Fix a bug where event updates might not be sent over replication to worker processes after the stream falls behind. (#7384)
Allow expired user accounts to log out their device sessions. (#7443)
Fix a bug that would cause Synapse not to resync out-of-sync device lists. (#7453)
Prevent rooms with 0 members or with invalid version strings from breaking group queries. (#7465)
Workaround for an upstream Twisted bug that caused Synapse to become unresponsive after startup. (#7473)
Fix Redis reconnection logic that can result in missed updates over replication if master reconnects to Redis without restarting. (#7482)
When sending m.room.member events, omit displayname and avatar_url if they aren't set instead of setting them to null. Contributed by Aaron Raimist. (#7497)
Fix incorrect method label on synapse_http_matrixfederationclient_{requests,responses} prometheus metrics. (#7503)
Ignore incoming presence events from other homeservers if presence is disabled locally. (#7508)
Fix a long-standing bug that broke the update remote profile background process. (#7511)
Hash passwords as early as possible during password reset. (#7538)
Fix bug where a local user leaving a room could fail under rare circumstances. (#7548)
Fix "Missing RelayState parameter" error when using user interactive authentication with SAML for some SAML providers. (#7552)
Fix exception 'GenericWorkerReplicationHandler' object has no attribute 'send_federation_ack', introduced in v1.13.0. (#7564)
synctl now warns if it was unable to stop Synapse and will not attempt to start Synapse if nothing was stopped. Contributed by Romain Bouyé. (#6598)

Updates to the Docker image

Update docker runtime image to Alpine v3.11. Contributed by @Starbix. (#7398)

Improved Documentation

Update information about mapping providers for SAML and OpenID. (#7458)
Add additional reverse proxy example for Caddy v2. Contributed by Jeff Peeler. (#7463)
Fix copy-paste error in ServerNoticesConfig docstring. Contributed by @ptman. (#7477)
Improve the formatting of reverse_proxy.md. (#7514)
Change the systemd worker service to check that the worker config file exists instead of silently failing. Contributed by David Vo. (#7528)
Minor clarifications to the TURN docs. (#7533)

Internal Changes

Add typing annotations in synapse.federation. (#7382)
Convert the room handler to async/await. (#7396)
Improve performance of get_e2e_cross_signing_key. (#7428)
Improve performance of mark_as_sent_devices_by_remote. (#7429, #7562)
Add type hints to the SAML handler. (#7445)
Remove storage method get_hosts_in_room that is no longer called anywhere. (#7448)
Fix some typos in the notice_expiry templates. (#7449)
Convert the federation handler to async/await. (#7459)
Convert the search handler to async/await. (#7460)
Add type hints to synapse.event_auth. (#7505)
Convert the room member handler to async/await. (#7507)
Add type hints to room member handler. (#7513)
Fix typing annotations in tests.replication. (#7518)
Remove some redundant Python 2 support code. (#7519)
All endpoints now respond with a 200 OK for OPTIONS requests. (#7534, #7560)
Synapse now exports detailed allocator statistics and basic GC timings as Prometheus metrics (pypy_gc_time_seconds_total and pypy_memory_bytes) when run under PyPy. Contributed by Ivan Shapovalov. (#7536)
Remove Ubuntu Cosmic and Disco from the list of distributions which we provide .debs for, due to end-of-life. (#7539)
Make worker processes return a stubbed-out response to GET /presence requests. (#7545)
Optimise some references to hs.config. (#7546)
On upgrade room only send canonical alias once. (#7547)
Fix some indentation inconsistencies in the sample config. (#7550)
Include synapse.http.site in type checking. (#7553)
Fix some test code to not mangle stacktraces, to make it easier to debug errors. (#7554)
Refresh apt cache when building dh_virtualenv docker image. (#7555)
Stop logging some expected HTTP request errors as exceptions. (#7556, #7563)
Convert sending mail to async/await. (#7557)
Simplify reap_monthly_active_users. (#7558)

Synapse 1.13.0 (2020-05-19)

This release brings some potential changes necessary for certain configurations of Synapse:

If your Synapse is configured to use SSO and have a custom sso_redirect_confirm_template_dir configuration option set, you will need to duplicate the new sso_auth_confirm.html, sso_auth_success.html and sso_account_deactivated.html templates into that directory.
Synapse plugins using the complete_sso_login method of synapse.module_api.ModuleApi should instead switch to the async/await version, complete_sso_login_async, which includes additional checks. The former version is now deprecated.
A bug was introduced in Synapse 1.4.0 which could cause the room directory to be incomplete or empty if Synapse was upgraded directly from v1.2.1 or earlier, to versions between v1.4.0 and v1.12.x.

Please review UPGRADE.rst for more details on these changes and for general upgrade guidance.

Notice of change to the default `git` branch for Synapse

With the release of Synapse 1.13.0, the default git branch for Synapse has changed to develop, which is the development tip. This is more consistent with common practice and modern git usage.

The master branch, which tracks the latest release, is still available. It is recommended that developers and distributors who have scripts which run builds using the default branch of Synapse should therefore consider pinning their scripts to master.

Internal Changes

Update the version of dh-virtualenv we use to build debs, and add focal to the list of target distributions. (#7526)

Synapse 1.13.0rc3 (2020-05-18)

Bugfixes

Hash passwords as early as possible during registration. (#7523)

Synapse 1.13.0rc2 (2020-05-14)

Bugfixes

Fix a long-standing bug which could cause messages not to be sent over federation, when state events with state keys matching user IDs (such as custom user statuses) were received. (#7376)
Restore compatibility with non-compliant clients during the user interactive authentication process, fixing a problem introduced in v1.13.0rc1. (#7483)

Internal Changes

Fix linting errors in new version of Flake8. (#7470)

Synapse 1.13.0rc1 (2020-05-11)

Features

Extend the web_client_location option to accept an absolute URL to use as a redirect. Adds a warning when running the web client on the same hostname as homeserver. Contributed by Martin Milata. (#7006)
Set Referrer-Policy header to no-referrer on media downloads. (#7009)
Add support for running replication over Redis when using workers. (#7040, #7325, #7352, #7401, #7427, #7439, #7446, #7450, #7454)
Admin API POST /_synapse/admin/v1/join/<roomIdOrAlias> to join users to a room like auto_join_rooms for creation of users. (#7051)
Add options to prevent users from changing their profile or associated 3PIDs. (#7096)
Support SSO in the user interactive authentication workflow. (#7102, #7186, #7279, #7343)
Allow server admins to define and enforce a password policy (MSC2000). (#7118)
Improve the support for SSO authentication on the login fallback page. (#7152, #7235)
Always whitelist the login fallback in the SSO configuration if public_baseurl is set. (#7153)
Admin users are no longer required to be in a room to create an alias for it. (#7191)
Require admin privileges to enable room encryption by default. This does not affect existing rooms. (#7230)
Add a config option for specifying the value of the Accept-Language HTTP header when generating URL previews. (#7265)
Allow /requestToken endpoints to hide the existence (or lack thereof) of 3PID associations on the homeserver. (#7315)
Add a configuration setting to tweak the threshold for dummy events. (#7422)

Bugfixes

Don't attempt to use an invalid sqlite config if no database configuration is provided. Contributed by @nekatak. (#6573)
Fix single-sign on with CAS systems: pass the same service URL when requesting the CAS ticket and when calling the proxyValidate URL. Contributed by @Naugrimm. (#6634)
Fix missing field default when fetching user-defined push rules. (#6639)
Improve error responses when accessing remote public room lists. (#6899, #7368)
Transfer alias mappings on room upgrade. (#6946)
Ensure that a user interactive authentication session is tied to a single request. (#7068, #7455)
Fix a bug in the federation API which could cause occasional "Failed to get PDU" errors. (#7089)
Return the proper error (M_BAD_ALIAS) when a non-existant canonical alias is provided. (#7109)
Fix a bug which meant that groups updates were not correctly replicated between workers. (#7117)
Fix starting workers when federation sending not split out. (#7133)
Ensure is_verified is a boolean in responses to GET /_matrix/client/r0/room_keys/keys. Also warn the user if they forgot the version query param. (#7150)
Fix error page being shown when a custom SAML handler attempted to redirect when processing an auth response. (#7151)
Avoid importing sqlite3 when using the postgres backend. Contributed by David Vo. (#7155)
Fix excessive CPU usage by prune_old_outbound_device_pokes job. (#7159)
Fix a bug which could cause outbound federation traffic to stop working if a client uploaded an incorrect e2e device signature. (#7177)
Fix a bug which could cause incorrect 'cyclic dependency' error. (#7178)
Fix a bug that could cause a user to be invited to a server notices (aka System Alerts) room without any notice being sent. (#7199)
Fix some worker-mode replication handling not being correctly recorded in CPU usage stats. (#7203)
Do not allow a deactivated user to login via SSO. (#7240, #7259)
Fix --help command-line argument. (#7249)
Fix room publish permissions not being checked on room creation. (#7260)
Reject unknown session IDs during user interactive authentication instead of silently creating a new session. (#7268)
Fix a SQL query introduced in Synapse 1.12.0 which could cause large amounts of logging to the postgres slow-query log. (#7274)
Persist user interactive authentication sessions across workers and Synapse restarts. (#7302)
Fixed backwards compatibility logic of the first value of trusted_third_party_id_servers being used for account_threepid_delegates.email, which occurs when the former, deprecated option is set and the latter is not. (#7316)
Fix a bug where event updates might not be sent over replication to worker processes after the stream falls behind. (#7337, #7358)
Fix bad error handling that would cause Synapse to crash if it's provided with a YAML configuration file that's either empty or doesn't parse into a key-value map. (#7341)
Fix incorrect metrics reporting for renew_attestations background task. (#7344)
Prevent non-federating rooms from appearing in responses to federated POST /publicRoom requests when a filter was included. (#7367)
Fix a bug which would cause the room durectory to be incorrectly populated if Synapse was upgraded directly from v1.2.1 or earlier to v1.4.0 or later. Note that this fix does not apply retrospectively; see the upgrade notes for more information. (#7387)
Fix bug in EventContext.deserialize. (#7393)

Improved Documentation

Update Debian installation instructions to recommend installing the virtualenv package instead of python3-virtualenv. (#6892)
Improve the documentation for database configuration. (#6988)
Improve the documentation of application service configuration files. (#7091)
Update pre-built package name for FreeBSD. (#7107)
Update postgres docs with login troubleshooting information. (#7119)
Clean up INSTALL.md a bit. (#7141)
Add documentation for running a local CAS server for testing. (#7147)
Improve README.md by being explicit about public IP recommendation for TURN relaying. (#7167)
Fix a small typo in the metrics_flags config option. (#7171)
Update the contributed documentation on managing synapse workers with systemd, and bring it into the core distribution. (#7234)
Add documentation to the password_providers config option. Add known password provider implementations to docs. (#7238, #7248)
Modify suggested nginx reverse proxy configuration to match Synapse's default file upload size. Contributed by @ProCycleDev. (#7251)
Documentation of media_storage_providers options updated to avoid misunderstandings. Contributed by Tristan Lins. (#7272)
Add documentation on monitoring workers with Prometheus. (#7357)
Clarify endpoint usage in the users admin api documentation. (#7361)

Deprecations and Removals

Remove nonfunctional captcha_bypass_secret option from homeserver.yaml. (#7137)

Internal Changes

Add benchmarks for LruCache. (#6446)
Return total number of users and profile attributes in admin users endpoint. Contributed by Awesome Technologies Innovationslabor GmbH. (#6881)
Change device list streams to have one row per ID. (#7010)
Remove concept of a non-limited stream. (#7011)
Move catchup of replication streams logic to worker. (#7024, #7195, #7226, #7239, #7286, #7290, #7318, #7326, #7378, #7421)
Convert some of synapse.rest.media to async/await. (#7110, #7184, #7241)
De-duplicate / remove unused REST code for login and auth. (#7115)
Convert *StreamRow classes to inner classes. (#7116)
Clean up some LoggingContext code. (#7120, #7181, #7183, #7408, #7426)
Add explicit instance_id for USER_SYNC commands and remove implicit conn_id usage. (#7128)
Refactored the CAS authentication logic to a separate class. (#7136)
Run replication streamers on workers. (#7146)
Add tests for outbound device pokes. (#7157)
Fix device list update stream ids going backward. (#7158)
Use stream.current_token() and remove stream_positions(). (#7172)
Move client command handling out of TCP protocol. (#7185)
Move server command handling out of TCP protocol. (#7187)
Fix consistency of HTTP status codes reported in log lines. (#7188)
Only run one background database update at a time. (#7190)
Remove sent outbound device list pokes from the database. (#7192)
Add a background database update job to clear out duplicate device_lists_outbound_pokes. (#7193)
Remove some extraneous debugging log lines. (#7207)
Add explicit Python build tooling as dependencies for the snapcraft build. (#7213)
Add typing information to federation server code. (#7219)
Extend room admin api (GET /_synapse/admin/v1/rooms) with additional attributes. (#7225)
Unblacklist '/upgrade creates a new room' sytest for workers. (#7228)
Remove redundant checks on daemonize from synctl. (#7233)
Upgrade jQuery to v3.4.1 on fallback login/registration pages. (#7236)
Change log line that told user to implement onLogin/onRegister fallback js functions to a warning, instead of an info, so it's more visible. (#7237)
Correct the parameters of a test fixture. Contributed by Isaiah Singletary. (#7243)
Convert auth handler to async/await. (#7261)
Add some unit tests for replication. (#7278)
Improve typing annotations in synapse.replication.tcp.streams.Stream. (#7291)
Reduce log verbosity of url cache cleanup tasks. (#7295)
Fix sample SAML Service Provider configuration. Contributed by @frcl. (#7300)
Fix StreamChangeCache to work with multiple entities changing on the same stream id. (#7303)
Fix an incorrect import in IdentityHandler. (#7319)
Reduce logging verbosity for successful federation requests. (#7321)
Convert some federation handler code to async/await. (#7338)
Fix collation for postgres for unit tests. (#7359)
Convert RegistrationWorkerStore.is_server_admin and dependent code to async/await. (#7363)
Add an instance_name to RDATA and POSITION replication commands. (#7364)
Thread through instance name to replication client. (#7369)
Convert synapse.server_notices to async/await. (#7394)
Convert synapse.notifier to async/await. (#7395)
Fix issues with the Python package manifest. (#7404)
Prevent methods in synapse.handlers.auth from polling the homeserver config every request. (#7420)
Speed up fetching device lists changes when handling /sync requests. (#7423)
Run group attestation renewal in series rather than parallel for performance. (#7442)

Synapse 1.12.4 (2020-04-23)

No significant changes.

Synapse 1.12.4rc1 (2020-04-22)

Features

Always send users their own device updates. (#7160)
Add support for handling GET requests for account_data on a worker. (#7311)

Bugfixes

Fix a bug that prevented cross-signing with users on worker-mode synapses. (#7255)
Do not treat display names as globs in push rules. (#7271)
Fix a bug with cross-signing devices belonging to remote users who did not share a room with any user on the local homeserver. (#7289)

Synapse 1.12.3 (2020-04-03)

Remove the the pin to Pillow 7.0 which was introduced in Synapse 1.12.2, and correctly fix the issue with building the Debian packages. (#7212)

Synapse 1.12.2 (2020-04-02)

This release works around an issue with building the debian packages.

No other significant changes since 1.12.1.

Synapse 1.12.1 (2020-04-02)

No significant changes since 1.12.1rc1.

Synapse 1.12.1rc1 (2020-03-31)

Bugfixes

Fix starting workers when federation sending not split out. (#7133). Introduced in v1.12.0.
Avoid importing sqlite3 when using the postgres backend. Contributed by David Vo. (#7155). Introduced in v1.12.0rc1.
Fix a bug which could cause outbound federation traffic to stop working if a client uploaded an incorrect e2e device signature. (#7177). Introduced in v1.11.0.

Synapse 1.12.0 (2020-03-23)

Debian packages and Docker images are rebuilt using the latest versions of dependency libraries, including Twisted 20.3.0. Please see security advisory below.

Potential slow database update during upgrade

Synapse 1.12.0 includes a database update which is run as part of the upgrade, and which may take some time (several hours in the case of a large server). Synapse will not respond to HTTP requests while this update is taking place. For imformation on seeing if you are affected, and workaround if you are, see the upgrade notes.

Security advisory

Synapse may be vulnerable to request-smuggling attacks when it is used with a reverse-proxy. The vulnerabilties are fixed in Twisted 20.3.0, and are described in CVE-2020-10108 and CVE-2020-10109. For a good introduction to this class of request-smuggling attacks, see https://portswigger.net/research/http-desync-attacks-request-smuggling-reborn.

We are not aware of these vulnerabilities being exploited in the wild, and do not believe that they are exploitable with current versions of any reverse proxies. Nevertheless, we recommend that all Synapse administrators ensure that they have the latest versions of the Twisted library to ensure that their installation remains secure.

Administrators using the matrix.org Docker image or the Debian/Ubuntu packages from matrix.org should ensure that they have version 1.12.0 installed: these images include Twisted 20.3.0.
Administrators who have installed Synapse from source should upgrade Twisted within their virtualenv by running:
```
<path_to_virtualenv>/bin/pip install 'Twisted>=20.3.0'
```
Administrators who have installed Synapse from distribution packages should consult the information from their distributions.

The matrix.org Synapse instance was not vulnerable to these vulnerabilities.

Advance notice of change to the default `git` branch for Synapse

Currently, the default git branch for Synapse is master, which tracks the latest release.

After the release of Synapse 1.13.0, we intend to change this default to develop, which is the development tip. This is more consistent with common practice and modern git usage.

Although we try to keep develop in a stable state, there may be occasions where regressions creep in. Developers and distributors who have scripts which run builds using the default branch of Synapse should therefore consider pinning their scripts to master.

Synapse 1.12.0rc1 (2020-03-19)

Features

Changes related to room alias management (MSC2432):
- Publishing/removing a room from the room directory now requires the user to have a power level capable of modifying the canonical alias, instead of the room aliases. (#6965)
- Validate the alt_aliases property of canonical alias events. (#6971)
- Users with a power level sufficient to modify the canonical alias of a room can now delete room aliases. (#6986)
- Implement updated authorization rules and redaction rules for aliases events, from MSC2261 and MSC2432. (#7037)
- Stop sending m.room.aliases events during room creation and upgrade. (#6941)
- Synapse no longer uses room alias events to calculate room names for push notifications. (#6966)
- The room list endpoint no longer returns a list of aliases. (#6970)
- Remove special handling of aliases events from MSC2260 added in v1.10.0rc1. (#7034)
Expose the synctl, hash_password and generate_config commands in the snapcraft package. Contributed by @devec0. (#6315)
Check that server_name is correctly set before running database updates. (#6982)
Break down monthly active users by appservice_id and emit via Prometheus. (#7030)
Render a configurable and comprehensible error page if something goes wrong during the SAML2 authentication process. (#7058, #7067)
Add an optional parameter to control whether other sessions are logged out when a user's password is modified. (#7085)
Add prometheus metrics for the number of active pushers. (#7103, #7106)
Improve performance when making HTTPS requests to sygnal, sydent, etc, by sharing the SSL context object between connections. (#7094)

Bugfixes

When a user's profile is updated via the admin API, also generate a displayname/avatar update for that user in each room. (#6572)
Fix a couple of bugs in email configuration handling. (#6962)
Fix an issue affecting worker-based deployments where replication would stop working, necessitating a full restart, after joining a large room. (#6967)
Fix duplicate key error which was logged when rejoining a room over federation. (#6968)
Prevent user from setting 'deactivated' to anything other than a bool on the v2 PUT /users Admin API. (#6990)
Fix py35-old CI by using native tox package. (#7018)
Fix a bug causing org.matrix.dummy_event to be included in responses from /sync. (#7035)
Fix a bug that renders UTF-8 text files incorrectly when loaded from media. Contributed by @TheStranjer. (#7044)
Fix a bug that would cause Synapse to respond with an error about event visibility if a client tried to request the state of a room at a given token. (#7066)
Repair a data-corruption issue which was introduced in Synapse 1.10, and fixed in Synapse 1.11, and which could cause /sync to return with 404 errors about missing events and unknown rooms. (#7070)
Fix a bug causing account validity renewal emails to be sent even if the feature is turned off in some cases. (#7074)

Improved Documentation

Updated CentOS8 install instructions. Contributed by Richard Kellner. (#6925)
Fix POSTGRES_INITDB_ARGS in the contrib/docker/docker-compose.yml example docker-compose configuration. (#6984)
Change date in INSTALL.md for last date of getting TLS certificates to November 2019. (#7015)
Document that the fallback auth endpoints must be routed to the same worker node as the register endpoints. (#7048)

Deprecations and Removals

Remove the unused query_auth federation endpoint per MSC2451. (#7026)

Internal Changes

Add type hints to logging/context.py. (#6309)
Add some clarifications to README.md in the database schema directory. (#6615)
Refactoring work in preparation for changing the event redaction algorithm. (#6874, #6875, #6983, #7003)
Improve performance of v2 state resolution for large rooms. (#6952, #7095)
Reduce time spent doing GC, by freezing objects on startup. (#6953)
Minor perfermance fixes to get_auth_chain_ids. (#6954)
Don't record remote cross-signing keys in the devices table. (#6956)
Use flake8-comprehensions to enforce good hygiene of list/set/dict comprehensions. (#6957)
Merge worker apps together. (#6964, #7002, #7055, #7104)
Remove redundant store_room call from FederationHandler._process_received_pdu. (#6979)
Update warning for incorrect database collation/ctype to include link to documentation. (#6985)
Add some type annotations to the database storage classes. (#6987)
Port synapse.handlers.presence to async/await. (#6991, #7019)
Add some type annotations to the federation base & client classes. (#6995)
Port synapse.rest.keys to async/await. (#7020)
Add a type check to is_verified when processing room keys. (#7045)
Add type annotations and comments to the auth handler. (#7063)

Synapse 1.11.1 (2020-03-03)

This release includes a security fix impacting installations using Single Sign-On (i.e. SAML2 or CAS) for authentication. Administrators of such installations are encouraged to upgrade as soon as possible.

The release also includes fixes for a couple of other bugs.

Bugfixes

Add a confirmation step to the SSO login flow before redirecting users to the redirect URL. (b2bd54a2, 65c73cdf, a0178df1)
Fixed set a user as an admin with the admin API PUT /_synapse/admin/v2/users/<user_id>. Contributed by @dklimpel. (#6910)
Fix bug introduced in Synapse 1.11.0 which sometimes caused errors when joining rooms over federation, with 'coroutine' object has no attribute 'event_id'. (#6996)

Synapse 1.11.0 (2020-02-21)

Improved Documentation

Small grammatical fixes to the ACME v1 deprecation notice. (#6944)

Synapse 1.11.0rc1 (2020-02-19)

Features

Admin API to add or modify threepids of user accounts. (#6769)
Limit the number of events that can be requested by the backfill federation API to 100. (#6864)
Add ability to run some group APIs on workers. (#6866)
Reject device display names over 100 characters in length to prevent abuse. (#6882)
Add ability to route federation user device queries to workers. (#6873)
The result of a user directory search can now be filtered via the spam checker. (#6888)
Implement new GET /_matrix/client/unstable/org.matrix.msc2432/rooms/{roomId}/aliases endpoint as per MSC2432. (#6939, #6948, #6949)
Stop sending m.room.alias events wheng adding / removing aliases. Check alt_aliases in the latest m.room.canonical_alias event when deleting an alias. (#6904)
Change the default power levels of invites, tombstones and server ACLs for new rooms. (#6834)

Bugfixes

Fixed third party event rules function on_create_room's return value being ignored. (#6781)
Allow URL-encoded User IDs on /_synapse/admin/v2/users/<user_id>[/admin] endpoints. Thanks to @NHAS for reporting. (#6825)
Fix Synapse refusing to start if federation_certificate_verification_whitelist option is blank. (#6849)
Fix errors from logging in the purge jobs related to the message retention policies support. (#6945)
Return a 404 instead of 200 for querying information of a non-existant user through the admin API. (#6901)

Updates to the Docker image

The deprecated "generate-config-on-the-fly" mode is no longer supported. (#6918)

Improved Documentation

Add details of PR merge strategy to contributing docs. (#6846)
Spell out that the last event sent to a room won't be deleted by a purge. (#6891)
Update Synapse's documentation to warn about the deprecation of ACME v1. (#6905, #6907, #6909)
Add documentation for the spam checker. (#6906)
Fix worker docs to point /publicised_groups API correctly. (#6938)
Clean up and update docs on setting up federation. (#6940)
Add a warning about indentation to generated configuration files. (#6920)
Databases created using the compose file in contrib/docker will now always have correct encoding and locale settings. Contributed by Fridtjof Mund. (#6921)
Update pip install directions in readme to avoid error when using zsh. (#6855)

Deprecations and Removals

Remove m.lazy_load_members from unstable_features since lazy loading is in the stable Client-Server API version r0.5.0. (#6877)

Internal Changes

Add type hints to SyncHandler. (#6821)
Refactoring work in preparation for changing the event redaction algorithm. (#6823, #6827, #6854, #6856, #6857, #6858)
Fix stacktraces when using ObservableDeferred and async/await. (#6836)
Port much of synapse.handlers.federation to async/await. (#6837, #6840)
Populate rooms.room_version database column at startup, rather than in a background update. (#6847)
Reduce amount we log at INFO level. (#6833, #6862)
Remove unused get_room_stats_state method. (#6869)
Add typing to synapse.federation.sender and port to async/await. (#6871)
Refactor _EventInternalMetadata object to improve type safety. (#6872)
Add an additional entry to the SyTest blacklist for worker mode. (#6883)
Fix the use of sed in the linting scripts when using BSD sed. (#6887)
Add type hints to the spam checker module. (#6915)
Convert the directory handler tests to use HomeserverTestCase. (#6919)
Increase DB/CPU perf of _is_server_still_joined check. (#6936)
Tiny optimisation for incoming HTTP request dispatch. (#6950)

Synapse 1.10.1 (2020-02-17)

Bugfixes

Fix a bug introduced in Synapse 1.10.0 which would cause room state to be cleared in the database if Synapse was upgraded direct from 1.2.1 or earlier to 1.10.0. (#6924)

Synapse 1.10.0 (2020-02-12)

WARNING to client developers: As of this release Synapse validates client_secret parameters in the Client-Server API as per the spec. See #6766 for details.

Updates to the Docker image

Update the docker images to Alpine Linux 3.11. (#6897)

Synapse 1.10.0rc5 (2020-02-11)

Bugfixes

Fix the filtering introduced in 1.10.0rc3 to also apply to the state blocks returned by /sync. (#6884)

Synapse 1.10.0rc4 (2020-02-11)

This release candidate was built incorrectly and is superceded by 1.10.0rc5.

Synapse 1.10.0rc3 (2020-02-10)

Features

Filter out m.room.aliases from the CS API to mitigate abuse while a better solution is specced. (#6878)

Internal Changes

Fix continuous integration failures with old versions of pip, which were introduced by a release of the zipp library. (#6880)

Synapse 1.10.0rc2 (2020-02-06)

Bugfixes

Fix an issue with cross-signing where device signatures were not sent to remote servers. (#6844)
Fix to the unknown remote device detection which was introduced in 1.10.rc1. (#6848)

Internal Changes

Detect unexpected sender keys on remote encrypted events and resync device lists. (#6850)

Synapse 1.10.0rc1 (2020-01-31)

Features

Add experimental support for updated authorization rules for aliases events, from MSC2260. (#6787, #6790, #6794)

Bugfixes

Warn if postgres database has a non-C locale, as that can cause issues when upgrading locales (e.g. due to upgrading OS). (#6734)
Minor fixes to PUT /_synapse/admin/v2/users admin api. (#6761)
Validate client_secret parameter using the regex provided by the Client-Server API, temporarily allowing : characters for older clients. The : character will be removed in a future release. (#6767)
Fix persisting redaction events that have been redacted (or otherwise don't have a redacts key). (#6771)
Fix outbound federation request metrics. (#6795)
Fix bug where querying a remote user's device keys that weren't cached resulted in only returning a single device. (#6796)
Fix race in federation sender worker that delayed sending of device updates. (#6799, #6800)
Fix bug where Synapse didn't invalidate cache of remote users' devices when Synapse left a room. (#6801)
Fix waking up other workers when remote server is detected to have come back online. (#6811)

Improved Documentation

Clarify documentation related to user_dir and federation_reader workers. (#6775)

Internal Changes

Record room versions in the rooms table. (#6729, #6788, #6810)
Propagate cache invalidates from workers to other workers. (#6748)
Remove some unnecessary admin handler abstraction methods. (#6751)
Add some debugging for media storage providers. (#6757)
Detect unknown remote devices and mark cache as stale. (#6776, #6819)
Attempt to resync remote users' devices when detected as stale. (#6786)
Delete current state from the database when server leaves a room. (#6792)
When a client asks for a remote user's device keys check if the local cache for that user has been marked as potentially stale. (#6797)
Add background update to clean out left rooms from current state. (#6802, #6816)
Refactoring work in preparation for changing the event redaction algorithm. (#6803, #6805, #6806, #6807, #6820)

Synapse 1.9.1 (2020-01-28)

Bugfixes

Fix bug where setting mau_limit_reserved_threepids config would cause Synapse to refuse to start. (#6793)

Synapse 1.9.0 (2020-01-23)

WARNING: As of this release, Synapse no longer supports versions of SQLite before 3.11, and will refuse to start when configured to use an older version. Administrators are recommended to migrate their database to Postgres (see instructions here).

If your Synapse deployment uses workers, note that the reverse-proxy configurations for the synapse.app.media_repository, synapse.app.federation_reader and synapse.app.event_creator workers have changed, with the addition of a few paths (see the updated configurations here). Existing configurations will continue to work.

Improved Documentation

Fix endpoint documentation for the List Rooms admin API. (#6770)

Synapse 1.9.0rc1 (2020-01-22)

Features

Allow admin to create or modify a user. Contributed by Awesome Technologies Innovationslabor GmbH. (#5742)
Add new quarantine media admin APIs to quarantine by media ID or by user who uploaded the media. (#6681, #6756)
Add org.matrix.e2e_cross_signing to unstable_features in /versions as per MSC1756. (#6712)
Add a new admin API to list and filter rooms on the server. (#6720)

Bugfixes

Correctly proxy HTTP errors due to API calls to remote group servers. (#6654)
Fix media repo admin APIs when using a media worker. (#6664)
Fix "CRITICAL" errors being logged when a request is received for a uri containing non-ascii characters. (#6682)
Fix a bug where we would assign a numeric user ID if somebody tried registering with an empty username. (#6690)
Fix purge_room admin API. (#6711)
Fix a bug causing Synapse to not always purge quiet rooms with a low max_lifetime in their message retention policies when running the automated purge jobs. (#6714)
Fix the synapse_port_db not correctly running background updates. Thanks @tadzik for reporting. (#6718)
Fix changing password via user admin API. (#6730)
Fix /events/:event_id deprecated API. (#6731)
Fix monthly active user limiting support for worker mode, fixes #4639. (#6742)
Fix bug when setting account_validity to an empty block in the config. Thanks to @Sorunome for reporting. (#6747)
Fix AttributeError: 'NoneType' object has no attribute 'get' in hash_password when configuration has an empty password_config. Contributed by @ivilata. (#6753)
Fix the docker-compose.yaml overriding the entire /etc folder of the container. Contributed by Fabian Meyer. (#6656)

Improved Documentation

Fix a typo in the configuration example for purge jobs in the sample configuration file. (#6621)
Add complete documentation of the message retention policies support. (#6624, #6665)
Add some helpful tips about changelog entries to the GitHub pull request template. (#6663)
Clarify the account_validity and email sections of the sample configuration. (#6685)
Add more endpoints to the documentation for Synapse workers. (#6698)

Deprecations and Removals

Synapse no longer supports versions of SQLite before 3.11, and will refuse to start when configured to use an older version. Administrators are recommended to migrate their database to Postgres (see instructions here). (#6675)

Internal Changes

Add local_current_membership table for tracking local user membership state in rooms. (#6655, #6728)
Port synapse.replication.tcp to async/await. (#6666)
Fixup synapse.replication to pass mypy checks. (#6667)
Allow additional_resources to implement IResource directly. (#6686)
Allow REST endpoint implementations to raise a RedirectException, which will redirect the user's browser to a given location. (#6687)
Updates and extensions to the module API. (#6688)
Updates to the SAML mapping provider API. (#6689, #6723)
Remove redundant RegistrationError class. (#6691)
Don't block processing of incoming EDUs behind processing PDUs in the same transaction. (#6697)
Remove duplicate check for the session query parameter on the /auth/xxx/fallback/web Client-Server endpoint. (#6702)
Attempt to retry sending a transaction when we detect a remote server has come back online, rather than waiting for a transaction to be triggered by new data. (#6706)
Add StateMap type alias to simplify types. (#6715)
Add a DeltaState to track changes to be made to current state during event persistence. (#6716)
Add more logging around message retention policies support. (#6717)
When processing a SAML response, log the assertions for easier configuration. (#6724)
Fixup synapse.rest to pass mypy. (#6732, #6764)
Fixup synapse.api to pass mypy. (#6733)
Allow streaming cache 'invalidate all' to workers. (#6749)
Remove unused CI docker compose files. (#6754)

Synapse 1.8.0 (2020-01-09)

WARNING: As of this release Synapse will refuse to start if the log_file config option is specified. Support for the option was removed in v1.3.0.

Bugfixes

Fix GET request on /_synapse/admin/v2/users endpoint. Contributed by Awesome Technologies Innovationslabor GmbH. (#6563)
Fix incorrect signing of responses from the key server implementation. (#6657)

Synapse 1.8.0rc1 (2020-01-07)

Features

Add v2 APIs for the send_join and send_leave federation endpoints (as described in MSC1802). (#6349)
Add a develop script to generate full SQL schemas. (#6394)
Add custom SAML username mapping functionality through an external provider plugin. (#6411)
Automatically delete empty groups/communities. (#6453)
Add option limit_profile_requests_to_users_who_share_rooms to prevent requirement of a local user sharing a room with another user to query their profile information. (#6523)
Add an export_signing_key script to extract the public part of signing keys when rotating them. (#6546)
Add experimental config option to specify multiple databases. (#6580)
Raise an error if someone tries to use the log_file config option. (#6626)

Bugfixes

Prevent redacted events from being returned during message search. (#6377, #6522)
Prevent error on trying to search a upgraded room when the server is not in the predecessor room. (#6385)
Improve performance of looking up cross-signing keys. (#6486)
Fix race which occasionally caused deleted devices to reappear. (#6514)
Fix missing row in device_max_stream_id that could cause unable to decrypt errors after server restart. (#6555)
Fix a bug which meant that we did not send systemd notifications on startup if acme was enabled. (#6571)
Fix exception when fetching the matrix.org:ed25519:auto key. (#6625)
Fix bug where a moderator upgraded a room and became an admin in the new room. (#6633)
Fix an error which was thrown by the PresenceHandler _on_shutdown handler. (#6640)
Fix exceptions in the synchrotron worker log when events are rejected. (#6645)
Ensure that upgraded rooms are removed from the directory. (#6648)
Fix a bug causing Synapse not to fetch missing events when it believes it has every event in the room. (#6652)

Improved Documentation

Document the Room Shutdown Admin API. (#6541)
Reword sections of docs/federate.md that explained delegation at time of Synapse 1.0 transition. (#6601)
Added the section 'Configuration' in docs/turn-howto.md. (#6614)

Deprecations and Removals

Remove redundant code from event authorisation implementation. (#6502)
Remove unused, undocumented /_matrix/content API. (#6628)

Internal Changes

Add experimental support for multiple physical databases and split out state storage to separate data store. (#6245, #6510, #6511, #6513, #6564, #6565)
Port sections of code base to async/await. (#6496, #6504, #6505, #6517, #6559, #6647, #6653)
Remove SnapshotCache in favour of ResponseCache. (#6506)
Silence mypy errors for files outside those specified. (#6512)
Clean up some logging when handling incoming events over federation. (#6515)
Test more folders against mypy. (#6534)
Update mypy to new version. (#6537)
Adjust the sytest blacklist for worker mode. (#6538)
Remove unused get_pagination_rows methods from EventSource classes. (#6557)
Clean up logs from the push notifier at startup. (#6558)
Improve diagnostics on database upgrade failure. (#6570)
Reduce the reconnect time when worker replication fails, to make it easier to catch up. (#6617)
Simplify http handling by removing redundant SynapseRequestFactory. (#6619)
Add a workaround for synapse raising exceptions when fetching the notary's own key from the notary. (#6620)
Automate generation of the sample log config. (#6627)
Simplify event creation code by removing redundant queries on the event_reference_hashes table. (#6629)
Fix errors when frozen_dicts are enabled. (#6642)

Synapse 1.7.3 (2019-12-31)

This release fixes a long-standing bug in the state resolution algorithm.

Bugfixes

Fix exceptions caused by state resolution choking on malformed events. (#6608)

Synapse 1.7.2 (2019-12-20)

This release fixes some regressions introduced in Synapse 1.7.0 and 1.7.1.

Bugfixes

Fix a regression introduced in Synapse 1.7.1 which caused errors when attempting to backfill rooms over federation. (#6576)
Fix a bug introduced in Synapse 1.7.0 which caused an error on startup when upgrading from versions before 1.3.0. (#6578)

Synapse 1.7.1 (2019-12-18)

This release includes several security fixes as well as a fix to a bug exposed by the security fixes. Administrators are encouraged to upgrade as soon as possible.

Security updates

Fix a bug which could cause room events to be incorrectly authorized using events from a different room. (#6501, #6503, #6521, #6524, #6530, #6531)
Fix a bug causing responses to the /context client endpoint to not use the pruned version of the event. (#6553)
Fix a cause of state resets in room versions 2 onwards. (#6556, #6560)

Bugfixes

Fix a bug which could cause the federation server to incorrectly return errors when handling certain obscure event graphs. (#6526, #6527)

Synapse 1.7.0 (2019-12-13)

This release changes the default settings so that only local authenticated users can query the server's room directory. See the upgrade notes for details.

Support for SQLite versions before 3.11 is now deprecated. A future release will refuse to start if used with an SQLite version before 3.11.

Administrators are reminded that SQLite should not be used for production instances. Instructions for migrating to Postgres are available here. A future release of synapse will, by default, disable federation for servers using SQLite.

No significant changes since 1.7.0rc2.

Synapse 1.7.0rc2 (2019-12-11)

Bugfixes

Fix incorrect error message for invalid requests when setting user's avatar URL. (#6497)
Fix support for SQLite 3.7. (#6499)
Fix regression where sending email push would not work when using a pusher worker. (#6507, #6509)

Synapse 1.7.0rc1 (2019-12-09)

Features

Implement per-room message retention policies. (#5815, #6436)
Add etag and count fields to key backup endpoints to help clients guess if there are new keys. (#5858)
Add /admin/v2/users endpoint with pagination. Contributed by Awesome Technologies Innovationslabor GmbH. (#5925)
Require User-Interactive Authentication for /account/3pid/add, meaning the user's password will be required to add a third-party ID to their account. (#6119)
Implement the /_matrix/federation/unstable/net.atleastfornow/state/<context> API as drafted in MSC2314. (#6176)
Configure privacy-preserving settings by default for the room directory. (#6355)
Add ephemeral messages support by partially implementing MSC2228. (#6409)
Add support for MSC 2367, which allows specifying a reason on all membership events. (#6434)

Bugfixes

Transfer non-standard power levels on room upgrade. (#6237)
Fix error from the Pillow library when uploading RGBA images. (#6241)
Correctly apply the event filter to the state, events_before and events_after fields in the response to /context requests. (#6329)
Fix caching devices for remote users when using workers, so that we don't attempt to refetch (and potentially fail) each time a user requests devices. (#6332)
Prevent account data syncs getting lost across TCP replication. (#6333)
Fix bug: TypeError in register_user() while using LDAP auth module. (#6406)
Fix an intermittent exception when handling read-receipts. (#6408)
Fix broken guest registration when there are existing blocks of numeric user IDs. (#6420)
Fix startup error when http proxy is defined. (#6421)
Fix error when using synapse_port_db on a vanilla synapse db. (#6449)
Fix uploading multiple cross signing signatures for the same user. (#6451)
Fix bug which lead to exceptions being thrown in a loop when a cross-signed device is deleted. (#6462)
Fix synapse_port_db not exiting with a 0 code if something went wrong during the port process. (#6470)
Improve sanity-checking when receiving events over federation. (#6472)
Fix inaccurate per-block Prometheus metrics. (#6491)
Fix small performance regression for sending invites. (#6493)
Back out cross-signing code added in Synapse 1.5.0, which caused a performance regression. (#6494)

Improved Documentation

Update documentation and variables in user contributed systemd reference file. (#6369, #6490)
Fix link in the user directory documentation. (#6388)
Add build instructions to the docker readme. (#6390)
Switch Ubuntu package install recommendation to use python3 packages in INSTALL.md. (#6443)
Write some docs for the quarantine_media api. (#6458)
Convert CONTRIBUTING.rst to markdown (among other small fixes). (#6461)

Deprecations and Removals

Remove admin/v1/users_paginate endpoint. Contributed by Awesome Technologies Innovationslabor GmbH. (#5925)
Remove fallback for federation with old servers which lack the /federation/v1/state_ids API. (#6488)

Internal Changes

Add benchmarks for structured logging and improve output performance. (#6266)
Improve the performance of outputting structured logging. (#6322)
Refactor some code in the event authentication path for clarity. (#6343, #6468, #6480)
Clean up some unnecessary quotation marks around the codebase. (#6362)
Complain on startup instead of 500'ing during runtime when public_baseurl isn't set when necessary. (#6379)
Add a test scenario to make sure room history purges don't break /messages in the future. (#6392)
Clarifications for the email configuration settings. (#6423)
Add more tests to the blacklist when running in worker mode. (#6429)
Refactor data store layer to support multiple databases in the future. (#6454, #6464, #6469, #6487)
Port synapse.rest.client.v1 to async/await. (#6482)
Port synapse.rest.client.v2_alpha to async/await. (#6483)
Port SyncHandler to async/await. (#6484)

Synapse 1.6.1 (2019-11-28)

Security updates

This release includes a security fix (#6426, below). Administrators are encouraged to upgrade as soon as possible.

Bugfixes

Clean up local threepids from user on account deactivation. (#6426)
Fix startup error when http proxy is defined. (#6421)

Synapse 1.6.0 (2019-11-26)

Bugfixes

Fix phone home stats reporting. (#6418)

Synapse 1.6.0rc2 (2019-11-25)

Bugfixes

Fix a bug which could cause the background database update hander for event labels to get stuck in a loop raising exceptions. (#6407)

Synapse 1.6.0rc1 (2019-11-20)

Features

Add federation support for cross-signing. (#5727)
Increase default room version from 4 to 5, thereby enforcing server key validity period checks. (#6220)
Add support for outbound http proxying via http_proxy/HTTPS_PROXY env vars. (#6238)
Implement label-based filtering on /sync and /messages (MSC2326). (#6301, #6310, #6340)

Bugfixes

Fix LruCache callback deduplication for Python 3.8. Contributed by @V02460. (#6213)
Remove a room from a server's public rooms list on room upgrade. (#6232, #6235)
Delete keys from key backup when deleting backup versions. (#6253)
Make notification of cross-signing signatures work with workers. (#6254)
Fix exception when remote servers attempt to join a room that they're not allowed to join. (#6278)
Prevent errors from appearing on Synapse startup if git is not installed. (#6284)
Appservice requests will no longer contain a double slash prefix when the appservice url provided ends in a slash. (#6306)
Fix /purge_room admin API. (#6307)
Fix the hidden field in the devices table for SQLite versions prior to 3.23.0. (#6313)
Fix bug which casued rejected events to be persisted with the wrong room state. (#6320)
Fix bug where rc_login ratelimiting would prematurely kick in. (#6335)
Prevent the server taking a long time to start up when guest registration is enabled. (#6338)
Fix bug where upgrading a guest account to a full user would fail when account validity is enabled. (#6359)
Fix to_device stream ID getting reset every time Synapse restarts, which had the potential to cause unable to decrypt errors. (#6363)
Fix permission denied error when trying to generate a config file with the docker image. (#6389)

Improved Documentation

Contributor documentation now mentions script to run linters. (#6164)
Modify CAPTCHA_SETUP.md to update the terms private key and public key to secret key and site key respectively. Contributed by Yash Jipkate. (#6257)
Update INSTALL.md Email section to talk about account_threepid_delegates. (#6272)
Fix a small typo in account_threepid_delegates configuration option. (#6273)

Internal Changes

Add a CI job to test the synapse_port_db script. (#6140, #6276)
Convert EventContext to an attrs. (#6218)
Move persist_events out from main data store. (#6240, #6300)
Reduce verbosity of user/room stats. (#6250)
Reduce impact of debug logging. (#6251)
Expose some homeserver functionality to spam checkers. (#6259)
Change cache descriptors to always return deferreds. (#6263, #6291)
Fix incorrect comment regarding the functionality of an if statement. (#6269)
Update CI to run isort over the scripts and scripts-dev directories. (#6270)
Replace every instance of logger.warn method with logger.warning as the former is deprecated. (#6271, #6314)
Port replication http server endpoints to async/await. (#6274)
Port room rest handlers to async/await. (#6275)
Remove redundant CLI parameters on CI's flake8 step. (#6277)
Port federation_server.py to async/await. (#6279)
Port receipt and read markers to async/wait. (#6280)
Split out state storage into separate data store. (#6294, #6295)
Refactor EventContext for clarity. (#6298)
Update the version of black used to 19.10b0. (#6304)
Add some documentation about worker replication. (#6305)
Move admin endpoints into separate files. Contributed by Awesome Technologies Innovationslabor GmbH. (#6308)
Document the use of lint.sh for code style enforcement & extend it to run on specified paths only. (#6312)
Add optional python dependencies and dependant binary libraries to snapcraft packaging. (#6317)
Remove the dependency on psutil and replace functionality with the stdlib resource module. (#6318, #6336)
Improve documentation for EventContext fields. (#6319)
Add some checks that we aren't using state from rejected events. (#6330)
Add continuous integration for python 3.8. (#6341)
Correct spacing/case of various instances of the word "homeserver". (#6357)
Temporarily blacklist the failing unit test PurgeRoomTestCase.test_purge_room. (#6361)

Synapse 1.5.1 (2019-11-06)

Features

Limit the length of data returned by url previews, to prevent DoS attacks. (#6331, #6334)

Synapse 1.5.0 (2019-10-29)

Security updates

This release includes a security fix (#6262, below). Administrators are encouraged to upgrade as soon as possible.

Bugfixes

Fix bug where room directory search was case sensitive. (#6268)

Synapse 1.5.0rc2 (2019-10-28)

Bugfixes

Update list of boolean columns in synapse_port_db. (#6247)
Fix /keys/query API on workers. (#6256)
Improve signature checking on some federation APIs. (#6262)

Internal Changes

Move schema delta files to the correct data store. (#6248)
Small performance improvement by removing repeated config lookups in room stats calculation. (#6255)

Synapse 1.5.0rc1 (2019-10-24)

Features

Improve quality of thumbnails for 1-bit/8-bit color palette images. (#2142)
Add ability to upload cross-signing signatures. (#5726)
Allow uploading of cross-signing keys. (#5769)
CAS login now provides a default display name for users if a displayname_attribute is set in the configuration file. (#6114)
Reject all pending invites for a user during deactivation. (#6125)
Add config option to suppress client side resource limit alerting. (#6173)

Bugfixes

Return an HTTP 404 instead of 400 when requesting a filter by ID that is unknown to the server. Thanks to @krombel for contributing this! (#2380)
Fix a bug where users could be invited twice to the same group. (#3436)
Fix /createRoom failing with badly-formatted MXIDs in the invitee list. Thanks to @wener291! (#4088)
Make the synapse_port_db script create the right indexes on a new PostgreSQL database. (#6102, #6178, #6243)
Fix bug when uploading a large file: Synapse responds with M_UNKNOWN while it should be M_TOO_LARGE according to spec. Contributed by Anshul Angaria. (#6109)
Fix user push rules being deleted from a room when it is upgraded. (#6144)
Don't 500 when trying to exchange a revoked 3PID invite. (#6147)
Fix transferring notifications and tags when joining an upgraded room that is new to your server. (#6155)
Fix bug where guest account registration can wedge after restart. (#6161)
Fix monthly active user reaping when reserved users are specified. (#6168)
Fix /federation/v1/state endpoint not supporting newer room versions. (#6170)
Fix bug where we were updating censored events as bytes rather than text, occaisonally causing invalid JSON being inserted breaking APIs that attempted to fetch such events. (#6186)
Fix occasional missed updates in the room and user directories. (#6187)
Fix tracing of non-JSON APIs, /media, /key etc. (#6195)
Fix bug where presence would not get timed out correctly if a synchrotron worker is used and restarted. (#6212)
synapse_port_db: Add 2 additional BOOLEAN_COLUMNS to be able to convert from database schema v56. (#6216)
Fix a bug where the Synapse demo script blacklisted ::1 (ipv6 localhost) from receiving federation traffic. (#6229)

Updates to the Docker image

Fix logging getting lost for the docker image. (#6197)

Internal Changes

Update user_filters table to have a unique index, and non-null columns. Thanks to @pik for contributing this. (#1172, #6175, #6184)
Allow devices to be marked as hidden, for use by features such as cross-signing. This adds a new field with a default value to the devices field in the database, and so the database upgrade may take a long time depending on how many devices are in the database. (#5759)
Move lookup-related functions from RoomMemberHandler to IdentityHandler. (#5978)
Improve performance of the public room list directory. (#6019, #6152, #6153, #6154)
Edit header dicts docstrings in SimpleHttpClient to note that str or bytes can be passed as header keys. (#6077)
Add snapcraft packaging information. Contributed by @devec0. (#6084, #6191)
Kill off half-implemented password-reset via sms. (#6101)
Remove get_user_by_req opentracing span and add some tags. (#6108)
Drop some unused database tables. (#6115)
Add env var to turn on tracking of log context changes. (#6127)
Refactor configuration loading to allow better typechecking. (#6137)
Log responder when responding to media request. (#6139)
Improve performance of find_next_generated_user_id DB query. (#6148)
Expand type-checking on modules imported by synapse.config. (#6150)
Use Postgres ANY for selecting many values. (#6156)
Add more caching to _get_joined_users_from_context DB query. (#6159)
Add some metrics on the federation sender. (#6160)
Add some logging to the rooms stats updates, to try to track down a flaky test. (#6167)
Remove unused timeout parameter from _get_public_room_list. (#6179)
Reject (accidental) attempts to insert bytes into postgres tables. (#6186)
Make version optional in body of PUT /room_keys/version/{version}, since it's redundant. (#6189)
Make storage layer responsible for adding device names to key, rather than the handler. (#6193)
Port synapse.rest.admin module to use async/await. (#6196)
Enforce that all boolean configuration values are lowercase in CI. (#6203)
Remove some unused event-auth code. (#6214)
Remove Auth.check method. (#6217)
Remove format_tap.py script in favour of a perl reimplementation in Sytest's repo. (#6219)
Refactor storage layer in preparation to support having multiple databases. (#6231)
Remove some extra quotation marks across the codebase. (#6236)

Synapse 1.4.1 (2019-10-18)

No changes since 1.4.1rc1.

Synapse 1.4.1rc1 (2019-10-17)

Bugfixes

Fix bug where redacted events were sometimes incorrectly censored in the database, breaking APIs that attempted to fetch such events. (#6185, 5b0e9948)

Synapse 1.4.0 (2019-10-03)

Bugfixes

Redact client_secret in server logs. (#6158)

Synapse 1.4.0rc2 (2019-10-02)

Bugfixes

Fix bug in background update that adds last seen information to the devices table, and improve its performance on Postgres. (#6135)
Fix bad performance of censoring redactions background task. (#6141)
Fix fetching censored redactions from DB, which caused APIs like initial sync to fail if it tried to include the censored redaction. (#6145)
Fix exceptions when storing large retry intervals for down remote servers. (#6146)

Internal Changes

Fix up sample config entry for redaction_retention_period option. (#6117)

Synapse 1.4.0rc1 (2019-09-26)

Note that this release includes significant changes around 3pid verification. Administrators are reminded to review the upgrade notes.

Features

Changes to 3pid verification:
- Add the ability to send registration emails from the homeserver rather than delegating to an identity server. (#5835, #5940, #5993, #5994, #5868)
- Replace trust_identity_server_for_password_resets config option with account_threepid_delegates, and make the id_server parameteter optional on */requestToken endpoints, as per MSC2263. (#5876, #5969, #6028)
- Switch to using the v2 Identity Service /lookup API where available, with fallback to v1. (Implements MSC2134 plus id_access_token authentication for v2 Identity Service APIs from MSC2140). (#5897)
- Remove bind_email and bind_msisdn parameters from /register ala MSC2140. (#5964)
- Add m.id_access_token to unstable_features in /versions as per MSC2264. (#5974)
- Use the v2 Identity Service API for 3PID invites. (#5979)
- Add POST /_matrix/client/unstable/account/3pid/unbind endpoint from MSC2140 for unbinding a 3PID from an identity server without removing it from the homeserver user account. (#5980, #6062)
- Use account_threepid_delegate.email and account_threepid_delegate.msisdn for validating threepid sessions. (#6011)
- Allow homeserver to handle or delegate email validation when adding an email to a user's account. (#6042)
- Implement new Client Server API endpoints /account/3pid/add and /account/3pid/bind as per MSC2290. (#6043)
- Add an unstable feature flag for separate add/bind 3pid APIs. (#6044)
- Remove bind parameter from Client Server POST /account endpoint as per MSC2290. (#6067)
- Add POST /add_threepid/msisdn/submit_token endpoint for proxying submitToken on an account_threepid_handler. (#6078)
- Add submit_url response parameter to */msisdn/requestToken endpoints. (#6079)
- Add m.require_identity_server flag to /version's unstable_features. (#5972)
Enhancements to OpenTracing support:
- Make OpenTracing work in worker mode. (#5771)
- Pass OpenTracing contexts between servers when transmitting EDUs. (#5852)
- OpenTracing for device list updates. (#5853)
- Add a tag recording a request's authenticated entity and corresponding servlet in OpenTracing. (#5856)
- Add minimum OpenTracing for client servlets. (#5983)
- Check at setup that OpenTracing is installed if it's enabled in the config. (#5985)
- Trace replication send times. (#5986)
- Include missing OpenTracing contexts in outbout replication requests. (#5982)
- Fix sending of EDUs when OpenTracing is enabled with an empty whitelist. (#5984)
- Fix invalid references to None while OpenTracing if the log context slips. (#5988, #5991)
- OpenTracing for room and e2e keys. (#5855)
- Add OpenTracing span over HTTP push processing. (#6003)
Add an admin API to purge old rooms from the database. (#5845)
Retry well-known lookups if we have recently seen a valid well-known record for the server. (#5850)
Add support for filtered room-directory search requests over federation (MSC2197, in order to allow upcoming room directory query performance improvements. (#5859)
Correctly retry all hosts returned from SRV when we fail to connect. (#5864)
Add admin API endpoint for setting whether or not a user is a server administrator. (#5878)
Enable cleaning up extremities with dummy events by default to prevent undue build up of forward extremities. (#5884)
Add config option to sign remote key query responses with a separate key. (#5895)
Add support for config templating. (#5900)
Users with the type of "support" or "bot" are no longer required to consent. (#5902)
Let synctl accept a directory of config files. (#5904)
Increase max display name size to 256. (#5906)
Add admin API endpoint for getting whether or not a user is a server administrator. (#5914)
Redact events in the database that have been redacted for a week. (#5934)
New prometheus metrics:
- synapse_federation_known_servers: represents the total number of servers your server knows about (i.e. is in rooms with), including itself. Enable by setting metrics_flags.known_servers to True in the configuration.(#5981)
- synapse_build_info: exposes the Python version, OS version, and Synapse version of the running server. (#6005)
Give appropriate exit codes when synctl fails. (#5992)
Apply the federation blacklist to requests to identity servers. (#6000)
Add report_stats_endpoint option to configure where stats are reported to, if enabled. Contributed by @Sorunome. (#6012)
Add config option to increase ratelimits for room admins redacting messages. (#6015)
Stop sending federation transactions to servers which have been down for a long time. (#6026)
Make the process for mapping SAML2 users to matrix IDs more flexible. (#6037)
Return a clearer error message when a timeout occurs when attempting to contact an identity server. (#6073)
Prevent password reset's submit_token endpoint from accepting trailing slashes. (#6074)
Return 403 on /register/available if registration has been disabled. (#6082)
Explicitly log when a homeserver does not have the trusted_key_servers config field configured. (#6090)
Add support for pruning old rows in user_ips table. (#6098)

Bugfixes

Don't create broken room when power_level_content_override.users does not contain creator_id. (#5633)
Fix database index so that different backup versions can have the same sessions. (#5857)
Fix Synapse looking for config options password_reset_failure_template and password_reset_success_template, when they are actually password_reset_template_failure_html, password_reset_template_success_html. (#5863)
Fix stack overflow when recovering an appservice which had an outage. (#5885)
Fix error message which referred to public_base_url instead of public_baseurl. Thanks to @aaronraimist for the fix! (#5909)
Fix 404 for thumbnail download when dynamic_thumbnails is false and the thumbnail was dynamically generated. Fix reported by rkfg. (#5915)
Fix a cache-invalidation bug for worker-based deployments. (#5920)
Fix admin API for listing media in a room not being available with an external media repo. (#5966)
Fix list media admin API always returning an error. (#5967)
Fix room and user stats tracking. (#5971, #5998, #6029)
Return a M_MISSING_PARAM if sid is not provided to /account/3pid. (#5995)
federation_certificate_verification_whitelist now will not cause TypeErrors to be raised (a regression in 1.3). Additionally, it now supports internationalised domain names in their non-canonical representation. (#5996)
Only count real users when checking for auto-creation of auto-join room. (#6004)
Ensure support users can be registered even if MAU limit is reached. (#6020)
Fix bug where login error was shown incorrectly on SSO fallback login. (#6024)
Fix bug in calculating the federation retry backoff period. (#6025)
Prevent exceptions being logged when extremity-cleanup events fail due to lack of user consent to the terms of service. (#6053)
Remove POST method from password-reset submit_token endpoint until we implement submit_url functionality. (#6056)
Fix logcontext spam on non-Linux platforms. (#6059)
Ensure query parameters in email validation links are URL-encoded. (#6063)
Fix a bug which caused SAML attribute maps to be overridden by defaults. (#6069)
Fix the logged number of updated items for the users_set_deactivated_flag background update. (#6092)
Add sid to next_link for email validation. (#6097)
Threepid validity checks on msisdns should not be dependent on threepid_behaviour_email. (#6104)
Ensure that servers which are not configured to support email address verification do not offer it in the registration flows. (#6107)

Updates to the Docker image

Avoid changing UID/GID if they are already correct. (#5970)
Provide SYNAPSE_WORKER envvar to specify python module. (#6058)

Improved Documentation

Convert documentation to markdown (from rst) (#5849)
Update INSTALL.md to say that Python 2 is no longer supported. (#5953)
Add developer documentation for using SAML2. (#6032)
Add some notes on rolling back to v1.3.1. (#6049)
Update the upgrade notes. (#6050)

Deprecations and Removals

Remove shared-secret registration from /_matrix/client/r0/register endpoint. Contributed by Awesome Technologies Innovationslabor GmbH. (#5877)
Deprecate the trusted_third_party_id_servers option. (#5875)

Internal Changes

Lay the groundwork for structured logging output. (#5680)
Retry well-known lookup before the cache expires, giving a grace period where the remote well-known can be down but we still use the old result. (#5844)
Remove log line for debugging issue #5407. (#5860)
Refactor the Appservice scheduler code. (#5886)
Compatibility with v2 Identity Service APIs other than /lookup. (#5892, #6013)
Stop populating some unused tables. (#5893, #6047)
Add missing index on users_in_public_rooms to improve the performance of directory queries. (#5894)
Improve the logging when we have an error when fetching signing keys. (#5896)
Add support for database engine-specific schema deltas, based on file extension. (#5911)
Update Buildkite pipeline to use plugins instead of buildkite-agent commands. (#5922)
Add link in sample config to the logging config schema. (#5926)
Remove unnecessary parentheses in return statements. (#5931)
Remove unused jenkins/prepare_sytest.sh file. (#5938)
Move Buildkite pipeline config to the pipelines repo. (#5943)
Remove unnecessary return statements in the codebase which were the result of a regex run. (#5962)
Remove left-over methods from v1 registration API. (#5963)
Cleanup event auth type initialisation. (#5975)
Clean up dependency checking at setup. (#5989)
Update OpenTracing docs to use the unified trace method. (#5776)
Small refactor of function arguments and docstrings inRoomMemberHandler. (#6009)
Remove unused origin argument on FederationHandler.add_display_name_to_third_party_invite. (#6010)
Add a failure_ts column to the destinations database table. (#6016, #6072)
Clean up some code in the retry logic. (#6017)
Fix the structured logging tests stomping on the global log configuration for subsequent tests. (#6023)
Clean up the sample config for SAML authentication. (#6064)
Change mailer logging to reflect Synapse doesn't just do chat notifications by email now. (#6075)
Move last-seen info into devices table. (#6089)
Remove unused parameter to get_user_id_by_threepid. (#6099)
Refactor the user-interactive auth handling. (#6105)
Refactor code for calculating registration flows. (#6106)

Synapse 1.3.1 (2019-08-17)

Features

Drop hard dependency on sdnotify python package. (#5871)

Bugfixes

Fix startup issue (hang on ACME provisioning) due to ordering of Twisted reactor startup. Thanks to @chrismoos for supplying the fix. (#5867)

Synapse 1.3.0 (2019-08-15)

Bugfixes

Fix 500 Internal Server Error on publicRooms when the public room list was cached. (#5851)

Synapse 1.3.0rc1 (2019-08-13)

Features

Use M_USER_DEACTIVATED instead of M_UNKNOWN for errcode when a deactivated user attempts to login. (#5686)
Add sd_notify hooks to ease systemd integration and allows usage of Type=Notify. (#5732)
Synapse will no longer serve any media repo admin endpoints when enable_media_repo is set to False in the configuration. If a media repo worker is used, the admin APIs relating to the media repo will be served from it instead. (#5754, #5848)
Synapse can now be configured to not join remote rooms of a given "complexity" (currently, state events) over federation. This option can be used to prevent adverse performance on resource-constrained homeservers. (#5783)
Allow defining HTML templates to serve the user on account renewal attempt when using the account validity feature. (#5807)

Bugfixes

Fix UISIs during homeserver outage. (#5693, #5789)
Fix stack overflow in server key lookup code. (#5724)
start.sh no longer uses deprecated cli option. (#5725)
Log when we receive an event receipt from an unexpected origin. (#5743)
Fix debian packaging scripts to correctly build sid packages. (#5775)
Correctly handle redactions of redactions. (#5788)
Return 404 instead of 403 when accessing /rooms/{roomId}/event/{eventId} for an event without the appropriate permissions. (#5798)
Fix check that tombstone is a state event in push rules. (#5804)
Fix error when trying to login as a deactivated user when using a worker to handle login. (#5806)
Fix bug where user /sync stream could get wedged in rare circumstances. (#5825)
The purge_remote_media.sh script was fixed. (#5839)

Deprecations and Removals

Synapse now no longer accepts the -v/--verbose, -f/--log-file, or --log-config command line flags, and removes the deprecated verbose and log_file configuration file options. Users of these options should migrate their options into the dedicated log configuration. (#5678, #5729)
Remove non-functional 'expire_access_token' setting. (#5782)

Internal Changes

Make Jaeger fully configurable. (#5694)
Add precautionary measures to prevent future abuse of window.opener in default welcome page. (#5695)
Reduce database IO usage by optimising queries for current membership. (#5706, #5738, #5746, #5752, #5770, #5774, #5792, #5793)
Improve caching when fetching get_filtered_current_state_ids. (#5713)
Don't accept opentracing data from clients. (#5715)
Speed up PostgreSQL unit tests in CI. (#5717)
Update the coding style document. (#5719)
Improve database query performance when recording retry intervals for remote hosts. (#5720)
Add a set of opentracing utils. (#5722)
Cache result of get_version_string to reduce overhead of /version federation requests. (#5730)
Return 'user_type' in admin API user endpoints results. (#5731)
Don't package the sytest test blacklist file. (#5733)
Replace uses of returnValue with plain return, as returnValue is not needed on Python 3. (#5736)
Blacklist some flakey tests in worker mode. (#5740)
Fix some error cases in the caching layer. (#5749)
Add a prometheus metric for pending cache lookups. (#5750)
Stop trying to fetch events with event_id=None. (#5753)
Convert RedactionTestCase to modern test style. (#5768)
Allow looping calls to be given arguments. (#5780)
Set the logs emitted when checking typing and presence timeouts to DEBUG level, not INFO. (#5785)
Remove DelayedCall debugging from the test suite, as it is no longer required in the vast majority of Synapse's tests. (#5787)
Remove some spurious exceptions from the logs where we failed to talk to a remote server. (#5790)
Improve performance when making .well-known requests by sharing the SSL options between requests. (#5794)
Disable codecov GitHub comments on PRs. (#5796)
Don't allow clients to send tombstone events that reference the room it's sent in. (#5801)
Deny redactions of events sent in a different room. (#5802)
Deny sending well known state types as non-state events. (#5805)
Handle incorrectly encoded query params correctly by returning a 400. (#5808)
Handle pusher being deleted during processing rather than logging an exception. (#5809)
Return 502 not 500 when failing to reach any remote server. (#5810)
Reduce global pauses in the events stream caused by expensive state resolution during persistence. (#5826)
Add a lower bound to well-known lookup cache time to avoid repeated lookups. (#5836)
Whitelist history visbility sytests in worker mode tests. (#5843)

Synapse 1.2.1 (2019-07-26)

Security update

This release includes four security fixes:

Prevent an attack where a federated server could send redactions for arbitrary events in v1 and v2 rooms. (#5767)
Prevent a denial-of-service attack where cycles of redaction events would make Synapse spin infinitely. Thanks to @lrizika:matrix.org for identifying and responsibly disclosing this issue. (0f2ecb961)
Prevent an attack where users could be joined or parted from public rooms without their consent. Thanks to @dylangerdaly for identifying and responsibly disclosing this issue. (#5744)
Fix a vulnerability where a federated server could spoof read-receipts from users on other servers. Thanks to @dylangerdaly for identifying this issue too. (#5743)

Additionally, the following fix was in Synapse 1.2.0, but was not correctly identified during the original release:

It was possible for a room moderator to send a redaction for an m.room.create event, which would downgrade the room to version 1. Thanks to /dev/ponies for identifying and responsibly disclosing this issue! (#5701)

Synapse 1.2.0 (2019-07-25)

No significant changes.

Synapse 1.2.0rc2 (2019-07-24)

Bugfixes

Fix a regression introduced in v1.2.0rc1 which led to incorrect labels on some prometheus metrics. (#5734)

Synapse 1.2.0rc1 (2019-07-22)

Security fixes

This update included a security fix which was initially incorrectly flagged as a regular bug fix.

It was possible for a room moderator to send a redaction for an m.room.create event, which would downgrade the room to version 1. Thanks to /dev/ponies for identifying and responsibly disclosing this issue! (#5701)

Features

Add support for opentracing. (#5544, #5712)
Add ability to pull all locally stored events out of synapse that a particular user can see. (#5589)
Add a basic admin command app to allow server operators to run Synapse admin commands separately from the main production instance. (#5597)
Add sender and origin_server_ts fields to m.replace. (#5613)
Add default push rule to ignore reactions. (#5623)
Include the original event when asking for its relations. (#5626)
Implement session_lifetime configuration option, after which access tokens will expire. (#5660)
Return "This account has been deactivated" when a deactivated user tries to login. (#5674)
Enable aggregations support by default (#5714)

Bugfixes

Fix 'utime went backwards' errors on daemonization. (#5609)
Various minor fixes to the federation request rate limiter. (#5621)
Forbid viewing relations on an event once it has been redacted. (#5629)
Fix requests to the /store_invite endpoint of identity servers being sent in the wrong format. (#5638)
Fix newly-registered users not being able to lookup their own profile without joining a room. (#5644)
Fix bug in #5626 that prevented the original_event field from actually having the contents of the original event in a call to /relations. (#5654)
Fix 3PID bind requests being sent to identity servers as application/x-form-www-urlencoded data, which is deprecated. (#5658)
Fix some problems with authenticating redactions in recent room versions. (#5699, #5700, #5707)

Updates to the Docker image

Base Docker image on a newer Alpine Linux version (3.8 -> 3.10). (#5619)
Add missing space in default logging file format generated by the Docker image. (#5620)

Improved Documentation

Add information about nginx normalisation to reverse_proxy.rst. Contributed by @skalarproduktraum - thanks! (#5397)
--no-pep517 should be --no-use-pep517 in the documentation to setup the development environment. (#5651)
Improvements to Postgres setup instructions. Contributed by @Lrizika - thanks! (#5661)
Minor tweaks to postgres documentation. (#5675)

Deprecations and Removals

Remove support for the invite_3pid_guest configuration setting. (#5625)

Internal Changes

Move logging code out of synapse.util and into synapse.logging. (#5606, #5617)
Add a blacklist file to the repo to blacklist certain sytests from failing CI. (#5611)
Make runtime errors surrounding password reset emails much clearer. (#5616)
Remove dead code for persiting outgoing federation transactions. (#5622)
Add lint.sh to the scripts-dev folder which will run all linting steps required by CI. (#5627)
Move RegistrationHandler.get_or_create_user to test code. (#5628)
Add some more common python virtual-environment paths to the black exclusion list. (#5630)
Some counter metrics exposed over Prometheus have been renamed, with the old names preserved for backwards compatibility and deprecated. See docs/metrics-howto.rst for details. (#5636)
Unblacklist some user_directory sytests. (#5637)
Factor out some redundant code in the login implementation. (#5639)
Update ModuleApi to avoid register(generate_token=True). (#5640)
Remove access-token support from RegistrationHandler.register, and rename it. (#5641)
Remove access-token support from RegistrationStore.register, and rename it. (#5642)
Improve logging for auto-join when a new user is created. (#5643)
Remove unused and unnecessary check for FederationDeniedError in _exception_to_failure. (#5645)
Fix a small typo in a code comment. (#5655)
Clean up exception handling around client access tokens. (#5656)
Add a mechanism for per-test homeserver configuration in the unit tests. (#5657)
Inline issue_access_token. (#5659)
Update the sytest BuildKite configuration to checkout Synapse in /src. (#5664)
Add a docker type to the towncrier configuration. (#5673)
Convert synapse.federation.transport.server to async. Might improve some stack traces. (#5689)
Documentation for opentracing. (#5703)

Synapse 1.1.0 (2019-07-04)

As of v1.1.0, Synapse no longer supports Python 2, nor Postgres version 9.4. See the upgrade notes for more details.

This release also deprecates the use of environment variables to configure the docker image. See the docker README for more details.

No changes since 1.1.0rc2.

Synapse 1.1.0rc2 (2019-07-03)

Bugfixes

Fix regression in 1.1rc1 where OPTIONS requests to the media repo would fail. (#5593)
Removed the SYNAPSE_SMTP_* docker container environment variables. Using these environment variables prevented the docker container from starting in Synapse v1.0, even though they didn't actually allow any functionality anyway. (#5596)
Fix a number of "Starting txn from sentinel context" warnings. (#5605)

Internal Changes

Update github templates. (#5552)

Synapse 1.1.0rc1 (2019-07-02)

As of v1.1.0, Synapse no longer supports Python 2, nor Postgres version 9.4. See the upgrade notes for more details.

Features

Added possibilty to disable local password authentication. Contributed by Daniel Hoffend. (#5092)
Add monthly active users to phonehome stats. (#5252)
Allow expired user to trigger renewal email sending manually. (#5363)
Statistics on forward extremities per room are now exposed via Prometheus. (#5384, #5458, #5461)
Add --no-daemonize option to run synapse in the foreground, per issue #4130. Contributed by Soham Gumaste. (#5412, #5587)
Fully support SAML2 authentication. Contributed by Alexander Trost - thank you! (#5422)
Allow server admins to define implementations of extra rules for allowing or denying incoming events. (#5440, #5474, #5477)
Add support for handling pagination APIs on client reader worker. (#5505, #5513, #5531)
Improve help and cmdline option names for --generate-config options. (#5512)
Allow configuration of the path used for ACME account keys. (#5516, #5521, #5522)
Add --data-dir and --open-private-ports options. (#5524)
Split public rooms directory auth config in two settings, in order to manage client auth independently from the federation part of it. Obsoletes the "restrict_public_rooms_to_local_users" configuration setting. If "restrict_public_rooms_to_local_users" is set in the config, Synapse will act as if both new options are enabled, i.e. require authentication through the client API and deny federation requests. (#5534)
The minimum TLS version used for outgoing federation requests can now be set with federation_client_minimum_tls_version. (#5550)
Optimise devices changed query to not pull unnecessary rows from the database, reducing database load. (#5559)
Add new metrics for number of forward extremities being persisted and number of state groups involved in resolution. (#5476)

Bugfixes

Fix bug processing incoming events over federation if call to /get_missing_events fails. (#5042)
Prevent more than one room upgrade happening simultaneously on the same room. (#5051)
Fix a bug where running synapse_port_db would cause the account validity feature to fail because it didn't set the type of the email_sent column to boolean. (#5325)
Warn about disabling email-based password resets when a reset occurs, and remove warning when someone attempts a phone-based reset. (#5387)
Fix email notifications for unnamed rooms with multiple people. (#5388)
Fix exceptions in federation reader worker caused by attempting to renew attestations, which should only happen on master worker. (#5389)
Fix handling of failures fetching remote content to not log failures as exceptions. (#5390)
Fix a bug where deactivated users could receive renewal emails if the account validity feature is on. (#5394)
Fix missing invite state after exchanging 3PID invites over federaton. (#5464)
Fix intermittent exceptions on Apple hardware. Also fix bug that caused database activity times to be under-reported in log lines. (#5498)
Fix logging error when a tampered event is detected. (#5500)
Fix bug where clients could tight loop calling /sync for a period. (#5507)
Fix bug with jinja2 preventing Synapse from starting. Users who had this problem should now simply need to run pip install matrix-synapse. (#5514)
Fix a regression where homeservers on private IP addresses were incorrectly blacklisted. (#5523)
Fixed m.login.jwt using unregistred user_id and added pyjwt>=1.6.4 as jwt conditional dependencies. Contributed by Pau Rodriguez-Estivill. (#5555, #5586)
Fix a bug that would cause invited users to receive several emails for a single 3PID invite in case the inviter is rate limited. (#5576)

Updates to the Docker image

Add ability to change Docker containers timezone with the TZ variable. (#5383)
Update docker image to use Python 3.7. (#5546)
Deprecate the use of environment variables for configuration, and make the use of a static configuration the default. (#5561, #5562, #5566, #5567)
Increase default log level for docker image to INFO. It can still be changed by editing the generated log.config file. (#5547)
Send synapse logs to the docker logging system, by default. (#5565)
Open the non-TLS port by default. (#5568)
Fix failure to start under docker with SAML support enabled. (#5490)
Use a sensible location for data files when generating a config file. (#5563)

Deprecations and Removals

Python 2.7 is no longer a supported platform. Synapse now requires Python 3.5+ to run. (#5425)
PostgreSQL 9.4 is no longer supported. Synapse requires Postgres 9.5+ or above for Postgres support. (#5448)
Remove support for cpu_affinity setting. (#5525)

Improved Documentation

Improve README section on performance troubleshooting. (#4276)
Add information about how to install and run black on the codebase to code_style.rst. (#5537)
Improve install docs on choosing server_name. (#5558)

Internal Changes

Add logging to 3pid invite signature verification. (#5015)
Update example haproxy config to a more compatible setup. (#5313)
Track deactivated accounts in the database. (#5378, #5465, #5493)
Clean up code for sending federation EDUs. (#5381)
Add a sponsor button to the repo. (#5382, #5386)
Don't log non-200 responses from federation queries as exceptions. (#5383)
Update Python syntax in contrib/ to Python 3. (#5446)
Update federation_client dev script to support .well-known and work with python3. (#5447)
SyTest has been moved to Buildkite. (#5459)
Demo script now uses python3. (#5460)
Synapse can now handle RestServlets that return coroutines. (#5475, #5585)
The demo servers talk to each other again. (#5478)
Add an EXPERIMENTAL config option to try and periodically clean up extremities by sending dummy events. (#5480)
Synapse's codebase is now formatted by black. (#5482)
Some cleanups and sanity-checking in the CPU and database metrics. (#5499)
Improve email notification logging. (#5502)
Fix "Unexpected entry in 'full_schemas'" log warning. (#5509)
Improve logging when generating config files. (#5510)
Refactor and clean up Config parser for maintainability. (#5511)
Make the config clearer in that email.template_dir is relative to the Synapse's root directory, not the synapse/ folder within it. (#5543)
Update v1.0.0 release changelog to include more information about changes to password resets. (#5545)
Remove non-functioning check_event_hash.py dev script. (#5548)
Synapse will now only allow TLS v1.2 connections when serving federation, if it terminates TLS. As Synapse's allowed ciphers were only able to be used in TLSv1.2 before, this does not change behaviour. (#5550)
Logging when running GC collection on generation 0 is now at the DEBUG level, not INFO. (#5557)
Reduce the amount of stuff we send in the docker context. (#5564)
Point the reverse links in the Purge History contrib scripts at the intended location. (#5570)

Synapse 1.0.0 (2019-06-11)

Bugfixes

Fix bug where attempting to send transactions with large number of EDUs can fail. (#5418)

Improved Documentation

Expand the federation guide to include relevant content from the MSC1711 FAQ (#5419)

Internal Changes

Move password reset links to /_matrix/client/unstable namespace. (#5424)

Synapse 1.0.0rc3 (2019-06-10)

Security: Fix authentication bug introduced in 1.0.0rc1. Please upgrade to rc3 immediately

Synapse 1.0.0rc2 (2019-06-10)

Bugfixes

Remove redundant warning about key server response validation. (#5392)
Fix bug where old keys stored in the database with a null valid until timestamp caused all verification requests for that key to fail. (#5415)
Fix excessive memory using with default federation_verify_certificates: true configuration. (#5417)

Synapse 1.0.0rc1 (2019-06-07)

Features

Synapse now more efficiently collates room statistics. (#4338, #5260, #5324)
Add experimental support for relations (aka reactions and edits). (#5220)
Ability to configure default room version. (#5223, #5249)
Allow configuring a range for the account validity startup job. (#5276)
CAS login will now hit the r0 API, not the deprecated v1 one. (#5286)
Validate federation server TLS certificates by default (implements MSC1711). (#5359)
Update /_matrix/client/versions to reference support for r0.5.0. (#5360)
Add a script to generate new signing-key files. (#5361)
Update upgrade and installation guides ahead of 1.0. (#5371)
Replace the perspectives configuration section with trusted_key_servers, and make validating the signatures on responses optional (since TLS will do this job for us). (#5374)
Add ability to perform password reset via email without trusting the identity server. As a result of this PR, password resets will now be disabled on the default configuration.

Password reset emails are now sent from the homeserver by default, instead of the identity server. To enable this functionality, ensure email and public_baseurl config options are filled out.

If you would like to re-enable password resets being sent from the identity server (warning: this is dangerous! See #5345), set email.trust_identity_server_for_password_resets to true. (#5377)

Set default room version to v4. (#5379)

Bugfixes

Fixes client-server API not sending "m.heroes" to lazy-load /sync requests when a rooms name or its canonical alias are empty. Thanks to @dnaf for this work! (#5089)
Prevent federation device list updates breaking when processing multiple updates at once. (#5156)
Fix worker registration bug caused by ClientReaderSlavedStore being unable to see get_profileinfo. (#5200)
Fix race when backfilling in rooms with worker mode. (#5221)
Fix appservice timestamp massaging. (#5233)
Ensure that server_keys fetched via a notary server are correctly signed. (#5251)
Show the correct error when logging out and access token is missing. (#5256)
Fix error code when there is an invalid parameter on /_matrix/client/r0/publicRooms (#5257)
Fix error when downloading thumbnail with missing width/height parameter. (#5258)
Fix schema update for account validity. (#5268)
Fix bug where we leaked extremities when we soft failed events, leading to performance degradation. (#5274, #5278, #5291)
Fix "db txn 'update_presence' from sentinel context" log messages. (#5275)
Fix dropped logcontexts during high outbound traffic. (#5277)
Fix a bug where it is not possible to get events in the federation format with the request GET /_matrix/client/r0/rooms/{roomId}/messages. (#5293)
Fix performance problems with the rooms stats background update. (#5294)
Fix noisy 'no key for server' logs. (#5300)
Fix bug where a notary server would sometimes forget old keys. (#5307)
Prevent users from setting huge displaynames and avatar URLs. (#5309)
Fix handling of failures when processing incoming events where calling /event_auth on remote server fails. (#5317)
Ensure that we have an up-to-date copy of the signing key when validating incoming federation requests. (#5321)
Fix various problems which made the signing-key notary server time out for some requests. (#5333)
Fix bug which would make certain operations (such as room joins) block for 20 minutes while attemoting to fetch verification keys. (#5334)
Fix a bug where we could rapidly mark a server as unreachable even though it was only down for a few minutes. (#5335, #5340)
Fix a bug where account validity renewal emails could only be sent when email notifs were enabled. (#5341)
Fix failure when fetching batches of events during backfill, etc. (#5342)
Add a new room version where the timestamps on events are checked against the validity periods on signing keys. (#5348, #5354)
Fix room stats and presence background updates to correctly handle missing events. (#5352)
Include left members in room summaries' heroes. (#5355)
Fix federation_custom_ca_list configuration option. (#5362)
Fix missing logcontext warnings on shutdown. (#5369)

Improved Documentation

Fix docs on resetting the user directory. (#5282)
Fix notes about ACME in the MSC1711 faq. (#5357)

Internal Changes

Synapse will now serve the experimental "room complexity" API endpoint. (#5216)
The base classes for the v1 and v2_alpha REST APIs have been unified. (#5226, #5328)
Simplifications and comments in do_auth. (#5227)
Remove urllib3 pin as requests 2.22.0 has been released supporting urllib3 1.25.2. (#5230)
Preparatory work for key-validity features. (#5232, #5234, #5235, #5236, #5237, #5244, #5250, #5296, #5299, #5343, #5347, #5356)
Specify the type of reCAPTCHA key to use. (#5283)
Improve sample config for monthly active user blocking. (#5284)
Remove spurious debug from MatrixFederationHttpClient.get_json. (#5287)
Improve logging for logcontext leaks. (#5288)
Clarify that the admin change password API logs the user out. (#5303)
New installs will now use the v54 full schema, rather than the full schema v14 and applying incremental updates to v54. (#5320)
Improve docstrings on MatrixFederationClient. (#5332)
Clean up FederationClient.get_events for clarity. (#5344)
Various improvements to debug logging. (#5353)
Don't run CI build checks until sample config check has passed. (#5370)
Automatically retry buildkite builds (max twice) when an agent is lost. (#5380)

Synapse 0.99.5.2 (2019-05-30)

Bugfixes

Fix bug where we leaked extremities when we soft failed events, leading to performance degradation. (#5274, #5278, #5291)

Synapse 0.99.5.1 (2019-05-22)

0.99.5.1 supersedes 0.99.5 due to malformed debian changelog - no functional changes.

Synapse 0.99.5 (2019-05-22)

No significant changes.

Synapse 0.99.5rc1 (2019-05-21)

Features

Add ability to blacklist IP ranges for the federation client. (#5043)
Ratelimiting configuration for clients sending messages and the federation server has been altered to match login ratelimiting. The old configuration names will continue working. Check the sample config for details of the new names. (#5181)
Drop support for the undocumented /_matrix/client/v2_alpha API prefix. (#5190)
Add an option to disable per-room profiles. (#5196)
Stick an expiration date to any registered user missing one at startup if account validity is enabled. (#5204)
Add experimental support for relations (aka reactions and edits). (#5209, #5211, #5203, #5212)
Add a room version 4 which uses a new event ID format, as per MSC2002. (#5210, #5217)

Bugfixes

Fix image orientation when generating thumbnails (needs pillow>=4.3.0). Contributed by Pau Rodriguez-Estivill. (#5039)
Exclude soft-failed events from forward-extremity candidates: fixes "No forward extremities left!" error. (#5146)
Re-order stages in registration flows such that msisdn and email verification are done last. (#5174)
Fix 3pid guest invites. (#5177)
Fix a bug where the register endpoint would fail with M_THREEPID_IN_USE instead of returning an account previously registered in the same session. (#5187)
Prevent registration for user ids that are too long to fit into a state key. Contributed by Reid Anderson. (#5198)
Fix incompatibility between ACME support and Python 3.5.2. (#5218)
Fix error handling for rooms whose versions are unknown. (#5219)

Internal Changes

Make /sync attempt to return device updates for both joined and invited users. Note that this doesn't currently work correctly due to other bugs. (#3484)
Update tests to consistently be configured via the same code that is used when loading from configuration files. (#5171, #5185)
Allow client event serialization to be async. (#5183)
Expose DataStore._get_events as get_events_as_list. (#5184)
Make generating SQL bounds for pagination generic. (#5191)
Stop telling people to install the optional dependencies by default. (#5197)

Synapse 0.99.4 (2019-05-15)

No significant changes.

Synapse 0.99.4rc1 (2019-05-13)

Features

Add systemd-python to the optional dependencies to enable logging to the systemd journal. Install with pip install matrix-synapse[systemd]. (#4339)
Add a default .m.rule.tombstone push rule. (#4867)
Add ability for password provider modules to bind email addresses to users upon registration. (#4947)
Implementation of MSC1711 including config options for requiring valid TLS certificates for federation traffic, the ability to disable TLS validation for specific domains, and the ability to specify your own list of CA certificates. (#4967)
Remove presence list support as per MSC 1819. (#4989)
Reduce CPU usage starting pushers during start up. (#4991)
Add a delete group admin API. (#5002)
Add config option to block users from looking up 3PIDs. (#5010)
Add context to phonehome stats. (#5020)
Configure the example systemd units to have a log identifier of matrix-synapse instead of the executable name, python. Contributed by Christoph Müller. (#5023)
Add time-based account expiration. (#5027, #5047, #5073, #5116)
Add support for handling /versions, /voip and /push_rules client endpoints to client_reader worker. (#5063, #5065, #5070)
Add a configuration option to require authentication on /publicRooms and /profile endpoints. (#5083)
Move admin APIs to /_synapse/admin/v1. (The old paths are retained for backwards-compatibility, for now). (#5119)
Implement an admin API for sending server notices. Many thanks to @krombel who provided a foundation for this work. (#5121, #5142)

Bugfixes

Avoid redundant URL encoding of redirect URL for SSO login in the fallback login page. Fixes a regression introduced in #4220. Contributed by Marcel Fabian Krüger ("zaugin"). (#4555)
Fix bug where presence updates were sent to all servers in a room when a new server joined, rather than to just the new server. (#4942, #5103)
Fix sync bug which made accepting invites unreliable in worker-mode synapses. (#4955, #4956)
start.sh: Fix the --no-rate-limit option for messages and make it bypass rate limit on registration and login too. (#4981)
Transfer related groups on room upgrade. (#4990)
Prevent the ability to kick users from a room they aren't in. (#4999)
Fix issue #4596 so synapse_port_db script works with --curses option on Python 3. Contributed by Anders Jensen-Waud anders@jensenwaud.com. (#5003)
Clients timing out/disappearing while downloading from the media repository will now no longer log a spurious "Producer was not unregistered" message. (#5009)
Fix "cannot import name execute_batch" error with postgres. (#5032)
Fix disappearing exceptions in manhole. (#5035)
Workaround bug in twisted where attempting too many concurrent DNS requests could cause it to hang due to running out of file descriptors. (#5037)
Make sure we're not registering the same 3pid twice on registration. (#5071)
Don't crash on lack of expiry templates. (#5077)
Fix the ratelimiting on third party invites. (#5104)
Add some missing limitations to room alias creation. (#5124, #5128)
Limit the number of EDUs in transactions to 100 as expected by synapse. Thanks to @superboum for this work! (#5138)

Internal Changes

Add test to verify threepid auth check added in #4435. (#4474)
Fix/improve some docstrings in the replication code. (#4949)
Split synapse.replication.tcp.streams into smaller files. (#4953)
Refactor replication row generation/parsing. (#4954)
Run black to clean up formatting on synapse/storage/roommember.py and synapse/storage/events.py. (#4959)
Remove log line for password via the admin API. (#4965)
Fix typo in TLS filenames in docker/README.md. Also add the '-p' commandline option to the 'docker run' example. Contributed by Jurrie Overgoor. (#4968)
Refactor room version definitions. (#4969)
Reduce log level of .well-known/matrix/client responses. (#4972)
Add config.signing_key_path that can be read by synapse.config utility. (#4974)
Track which identity server is used when binding a threepid and use that for unbinding, as per MSC1915. (#4982)
Rewrite KeyringTestCase as a HomeserverTestCase. (#4985)
README updates: Corrected the default POSTGRES_USER. Added port forwarding hint in TLS section. (#4987)
Remove a number of unused tables from the database schema. (#4992, #5028, #5033)
Run black on the remainder of synapse/storage/. (#4996)
Fix grammar in get_current_users_in_room and give it a docstring. (#4998)
Clean up some code in the server-key Keyring. (#5001)
Convert SYNAPSE_NO_TLS Docker variable to boolean for user friendliness. Contributed by Gabriel Eckerson. (#5005)
Refactor synapse.storage._base._simple_select_list_paginate. (#5007)
Store the notary server name correctly in server_keys_json. (#5024)
Rewrite Datastore.get_server_verify_keys to reduce the number of database transactions. (#5030)
Remove extraneous period from copyright headers. (#5046)
Update documentation for where to get Synapse packages. (#5067)
Add workarounds for pep-517 install errors. (#5098)
Improve logging when event-signature checks fail. (#5100)
Factor out an "assert_requester_is_admin" function. (#5120)
Remove the requirement to authenticate for /admin/server_version. (#5122)
Prevent an exception from being raised in a IResolutionReceiver and use a more generic error message for blacklisted URL previews. (#5155)
Run black on the tests directory. (#5170)
Fix CI after new release of isort. (#5179)
Fix bogus imports in unit tests. (#5154)

Synapse 0.99.3.2 (2019-05-03)

Internal Changes

Ensure that we have urllib3 <1.25, to resolve incompatibility with requests. (#5135)

Synapse 0.99.3.1 (2019-05-03)

Security update

This release includes two security fixes:

Switch to using a cryptographically-secure random number generator for token strings, ensuring they cannot be predicted by an attacker. Thanks to @opnsec for identifying and responsibly disclosing this issue! (#5133)
Blacklist 0.0.0.0 and :: by default for URL previews. Thanks to @opnsec for identifying and responsibly disclosing this issue too! (#5134)

Synapse 0.99.3 (2019-04-01)

No significant changes.

Synapse 0.99.3rc1 (2019-03-27)

Features

The user directory has been rewritten to make it faster, with less chance of falling behind on a large server. (#4537, #4846, #4864, #4887, #4900, #4944)
Add configurable rate limiting to the /register endpoint. (#4735, #4804)
Move server key queries to federation reader. (#4757)
Add support for /account/3pid REST endpoint to client_reader worker. (#4759)
Add an endpoint to the admin API for querying the server version. Contributed by Joseph Weston. (#4772)
Include a default configuration file in the 'docs' directory. (#4791, #4801)
Synapse is now permissive about trailing slashes on some of its federation endpoints, allowing zero or more to be present. (#4793)
Add support for /keys/query and /keys/changes REST endpoints to client_reader worker. (#4796)
Add checks to incoming events over federation for events evading auth (aka "soft fail"). (#4814)
Add configurable rate limiting to the /login endpoint. (#4821, #4865)
Remove trailing slashes from certain outbound federation requests. Retry if receiving a 404. Context: #3622. (#4840)
Allow passing --daemonize flags to workers in the same way as with master. (#4853)
Batch up outgoing read-receipts to reduce federation traffic. (#4890, #4927)
Add option to disable searching the user directory. (#4895)
Add option to disable searching of local and remote public room lists. (#4896)
Add ability for password providers to login/register a user via 3PID (email, phone). (#4931)

Bugfixes

Fix a bug where media with spaces in the name would get a corrupted name. (#2090)
Fix attempting to paginate in rooms where server cannot see any events, to avoid unnecessarily pulling in lots of redacted events. (#4699)
'event_id' is now a required parameter in federated state requests, as per the matrix spec. (#4740)
Fix tightloop over connecting to replication server. (#4749)
Fix parsing of Content-Disposition headers on remote media requests and URL previews. (#4763)
Fix incorrect log about not persisting duplicate state event. (#4776)
Fix v4v6 option in HAProxy example config. Contributed by Flakebi. (#4790)
Handle batch updates in worker replication protocol. (#4792)
Fix bug where we didn't correctly throttle sending of USER_IP commands over replication. (#4818)
Fix potential race in handling missing updates in device list updates. (#4829)
Fix bug where synapse expected an un-specced prev_state field on state events. (#4837)
Transfer a user's notification settings (push rules) on room upgrade. (#4838)
fix test_auto_create_auto_join_where_no_consent. (#4886)
Fix a bug where hs_disabled_message was sometimes not correctly enforced. (#4888)
Fix bug in shutdown room admin API where it would fail if a user in the room hadn't consented to the privacy policy. (#4904)
Fix bug where blocked world-readable rooms were still peekable. (#4908)

Internal Changes

Add a systemd setup that supports synapse workers. Contributed by Luca Corbatto. (#4662)
Change from TravisCI to Buildkite for CI. (#4752)
When presence is disabled don't send over replication. (#4757)
Minor docstring fixes for MatrixFederationAgent. (#4765)
Optimise EDU transmission for the federation_sender worker. (#4770)
Update test_typing to use HomeserverTestCase. (#4771)
Update URLs for riot.im icons and logos in the default notification templates. (#4779)
Removed unnecessary $ from some federation endpoint path regexes. (#4794)
Remove link to deleted title in README. (#4795)
Clean up read-receipt handling. (#4797)
Add some debug about processing read receipts. (#4798)
Clean up some replication code. (#4799)
Add some docstrings. (#4815)
Add debug logger to try and track down #4422. (#4816)
Make shutdown API send explanation message to room after users have been forced joined. (#4817)
Update example_log_config.yaml. (#4820)
Document the generate option for the docker image. (#4824)
Fix check-newsfragment for debian-only changes. (#4825)
Add some debug logging for device list updates to help with #4828. (#4828)
Improve federation documentation, specifically .well-known support. Many thanks to @vaab. (#4832)
Disable captcha registration by default in unit tests. (#4839)
Add stuff back to the .gitignore. (#4843)
Clarify what registration_shared_secret allows for. (#4844)
Correctly log expected errors when fetching server keys. (#4847)
Update install docs to explicitly state a full-chain (not just the top-level) TLS certificate must be provided to Synapse. This caused some people's Synapse ports to appear correct in a browser but still (rightfully so) upset the federation tester. (#4849)
Move client read-receipt processing to federation sender worker. (#4852)
Refactor federation TransactionQueue. (#4855)
Comment out most options in the generated config. (#4863)
Fix yaml library warnings by using safe_load. (#4869)
Update Apache setup to remove location syntax. Thanks to @cwmke! (#4870)
Reinstate test case that runs unit tests against oldest supported dependencies. (#4879)
Update link to federation docs. (#4881)
fix test_auto_create_auto_join_where_no_consent. (#4886)
Use a regular HomeServerConfig object for unit tests rater than a Mock. (#4889)
Add some notes about tuning postgres for larger deployments. (#4895)
Add a config option for torture-testing worker replication. (#4902)
Log requests which are simulated by the unit tests. (#4905)
Allow newsfragments to end with exclamation marks. Exciting! (#4912)
Refactor some more tests to use HomeserverTestCase. (#4913)
Refactor out the state deltas portion of the user directory store and handler. (#4917)
Fix nginx example in ACME doc. (#4923)
Use an explicit dbname for postgres connections in the tests. (#4928)
Fix ClientReplicationStreamProtocol.__str__(). (#4929)

Synapse 0.99.2 (2019-03-01)

Features

Added an HAProxy example in the reverse proxy documentation. Contributed by Benoît S. (“Benpro”). (#4541)
Add basic optional sentry integration. (#4632, #4694)
Transfer bans on room upgrade. (#4642)
Add configurable room list publishing rules. (#4647)
Support .well-known delegation when issuing certificates through ACME. (#4652)
Allow registration and login to be handled by a worker instance. (#4666, #4670, #4682)
Reduce the overhead of creating outbound federation connections over TLS by caching the TLS client options. (#4674)
Add prometheus metrics for number of outgoing EDUs, by type. (#4695)
Return correct error code when inviting a remote user to a room whose homeserver does not support the room version. (#4721)
Prevent showing rooms to other servers that were set to not federate. (#4746)

Bugfixes

Fix possible exception when paginating. (#4263)
The dependency checker now correctly reports a version mismatch for optional dependencies, instead of reporting the dependency missing. (#4450)
Set CORS headers on .well-known requests. (#4651)
Fix kicking guest users on guest access revocation in worker mode. (#4667)
Fix an issue in the database migration script where the e2e_room_keys.is_verified column wasn't considered as a boolean. (#4680)
Fix TaskStopped exceptions in logs when outbound requests time out. (#4690)
Fix ACME config for python 2. (#4717)
Fix paginating over federation persisting incorrect state. (#4718)

Internal Changes

Run black to reformat user directory code. (#4635)
Reduce number of exceptions we log. (#4643, #4668)
Introduce upsert batching functionality in the database layer. (#4644)
Fix various spelling mistakes. (#4657)
Cleanup request exception logging. (#4669, #4737, #4738)
Improve replication performance by reducing cache invalidation traffic. (#4671, #4715, #4748)
Test against Postgres 9.5 as well as 9.4. (#4676)
Run unit tests against python 3.7. (#4677)
Attempt to clarify installation instructions/config. (#4681)
Clean up gitignores. (#4688)
Minor tweaks to acme docs. (#4689)
Improve the logging in the pusher process. (#4691)
Better checks on newsfragments. (#4698, #4750)
Avoid some redundant work when processing read receipts. (#4706)
Run push_receipts_to_remotes as background job. (#4707)
Add prometheus metrics for number of badge update pushes. (#4709)
Reduce pusher logging on startup (#4716)
Don't log exceptions when failing to fetch remote server keys. (#4722)
Correctly proxy exception in frontend_proxy worker. (#4723)
Add database version to phonehome stats. (#4753)

Synapse 0.99.1.1 (2019-02-14)

Bugfixes

Fix "TypeError: '>' not supported" when starting without an existing certificate. Fix a bug where an existing certificate would be reprovisoned every day. (#4648)

Synapse 0.99.1 (2019-02-14)

Features

Include m.room.encryption on invites by default (#3902)
Federation OpenID listener resource can now be activated even if federation is disabled (#4420)
Synapse's ACME support will now correctly reprovision a certificate that approaches its expiry while Synapse is running. (#4522)
Add ability to update backup versions (#4580)
Allow the "unavailable" presence status for /sync. This change makes Synapse compliant with r0.4.0 of the Client-Server specification. (#4592)
There is no longer any need to specify no_tls: it is inferred from the absence of TLS listeners (#4613, #4615, #4617, #4636)
The default configuration no longer requires TLS certificates. (#4614)

Bugfixes

Copy over room federation ability on room upgrade. (#4530)
Fix noisy "twisted.internet.task.TaskStopped" errors in logs (#4546)
Synapse is now tolerant of the tls_fingerprints option being None or not specified. (#4589)
Fix 'no unique or exclusion constraint' error (#4591)
Transfer Server ACLs on room upgrade. (#4608)
Fix failure to start when not TLS certificate was given even if TLS was disabled. (#4618)
Fix self-signed cert notice from generate-config. (#4625)
Fix performance of user_ips table deduplication background update (#4626, #4627)

Internal Changes

Change the user directory state query to use a filtered call to the db instead of a generic one. (#4462)
Reject federation transactions if they include more than 50 PDUs or 100 EDUs. (#4513)
Reduce duplication of synapse.app code. (#4567)
Fix docker upload job to push -py2 images. (#4576)
Add port configuration information to ACME instructions. (#4578)
Update MSC1711 FAQ to calrify .well-known usage (#4584)
Clean up default listener configuration (#4586)
Clarifications for reverse proxy docs (#4607)
Move ClientTLSOptionsFactory init out of refresh_certificates (#4611)
Fail cleanly if listener config lacks a 'port' (#4616)
Remove redundant entries from docker config (#4619)
README updates (#4621)

Synapse 0.99.0 (2019-02-05)

Synapse v0.99.x is a precursor to the upcoming Synapse v1.0 release. It contains foundational changes to room architecture and the federation security model necessary to support the upcoming r0 release of the Server to Server API.

Features

Synapse's cipher string has been updated to require ECDH key exchange. Configuring and generating dh_params is no longer required, and they will be ignored. (#4229)
Synapse can now automatically provision TLS certificates via ACME (the protocol used by CAs like Let's Encrypt). (#4384, #4492, #4525, #4572, #4564, #4566, #4547, #4557)
Implement MSC1708 (.well-known routing for server-server federation) (#4408, #4409, #4426, #4427, #4428, #4464, #4468, #4487, #4488, #4489, #4497, #4511, #4516, #4520, #4521, #4539, #4542, #4544)
Search now includes results from predecessor rooms after a room upgrade. (#4415)
Config option to disable requesting MSISDN on registration. (#4423)
Add a metric for tracking event stream position of the user directory. (#4445)
Support exposing server capabilities in CS API (MSC1753, MSC1804) (#4472, 81b7e7eed))
Add support for room version 3 (#4483, #4499, #4515, #4523, #4535)
Synapse will now reload TLS certificates from disk upon SIGHUP. (#4495, #4524)
The matrixdotorg/synapse Docker images now use Python 3 by default. (#4558)

Bugfixes

Prevent users with access tokens predating the introduction of device IDs from creating spurious entries in the user_ips table. (#4369)
Fix typo in ALL_USER_TYPES definition to ensure type is a tuple (#4392)
Fix high CPU usage due to remote devicelist updates (#4397)
Fix potential bug where creating or joining a room could fail (#4404)
Fix bug when rejecting remote invites (#4405, #4527)
Fix incorrect logcontexts after a Deferred was cancelled (#4407)
Ensure encrypted room state is persisted across room upgrades. (#4411)
Copy over whether a room is a direct message and any associated room tags on room upgrade. (#4412)
Fix None guard in calling config.server.is_threepid_reserved (#4435)
Don't send IP addresses as SNI (#4452)
Fix UnboundLocalError in post_urlencoded_get_json (#4460)
Add a timeout to filtered room directory queries. (#4461)
Workaround for login error when using both LDAP and internal authentication. (#4486)
Fix a bug where setting a relative consent directory path would cause a crash. (#4512)

Deprecations and Removals

Synapse no longer generates self-signed TLS certificates when generating a configuration file. (#4509)

Improved Documentation

Update debian installation instructions (#4526)

Internal Changes

Synapse will now take advantage of native UPSERT functionality in PostgreSQL 9.5+ and SQLite 3.24+. (#4306, #4459, #4466, #4471, #4477, #4505)
Update README to use the new virtualenv everywhere (#4342)
Add better logging for unexpected errors while sending transactions (#4368)
Apply a unique index to the user_ips table, preventing duplicates. (#4370, #4432, #4434)
Silence travis-ci build warnings by removing non-functional python3.6 (#4377)
Fix a comment in the generated config file (#4387)
Add ground work for implementing future federation API versions (#4390)
Update dependencies on msgpack and pymacaroons to use the up-to-date packages. (#4399)
Tweak codecov settings to make them less loud. (#4400)
Implement server support for MSC1794 - Federation v2 Invite API (#4402)
debian package: symlink to explicit python version (#4433)
Add infrastructure to support different event formats (#4437, #4447, #4448, #4470, #4481, #4482, #4493, #4494, #4496, #4510, #4514)
Generate the debian config during build (#4444)
Clarify documentation for the public_baseurl config param (#4458, #4498)
Fix quoting for allowed_local_3pids example config (#4476)
Remove deprecated --process-dependency-links option from UPGRADE.rst (#4485)
Make it possible to set the log level for tests via an environment variable (#4506)
Reduce the log level of linearizer lock acquirement to DEBUG. (#4507)
Fix code to comply with linting in PyFlakes 3.7.1. (#4519)
Add some debug for membership syncing issues (#4538)
Docker: only copy what we need to the build image (#4562)

Synapse 0.34.1.1 (2019-01-11)

This release fixes CVE-2019-5885 and is recommended for all users of Synapse 0.34.1.

This release is compatible with Python 2.7 and 3.5+. Python 3.7 is fully supported.

Bugfixes

Fix spontaneous logout on upgrade (#4374)

Synapse 0.34.1 (2019-01-09)

Internal Changes

Add better logging for unexpected errors while sending transactions (#4361, #4362)

Synapse 0.34.1rc1 (2019-01-08)

Features

Special-case a support user for use in verifying behaviour of a given server. The support user does not appear in user directory or monthly active user counts. (#4141, #4344)
Support for serving .well-known files (#4262)
Rework SAML2 authentication (#4265, #4267)
SAML2 authentication: Initialise user display name from SAML2 data (#4272)
Synapse can now have its conditional/extra dependencies installed by pip. This functionality can be used by using pip install matrix-synapse[feature], where feature is a comma separated list with the possible values email.enable_notifs, matrix-synapse-ldap3, postgres, resources.consent, saml2, url_preview, and test. If you want to install all optional dependencies, you can use "all" instead. (#4298, #4325, #4327)
Add routes for reading account data. (#4303)
Add opt-in support for v2 rooms (#4307)
Add a script to generate a clean config file (#4315)
Return server data in /login response (#4319)

Bugfixes

Fix contains_url check to be consistent with other instances in code-base and check that value is an instance of string. (#3405)
Fix CAS login when username is not valid in an MXID (#4264)
Send CORS headers for /media/config (#4279)
Add 'sandbox' to CSP for media reprository (#4284)
Make the new landing page prettier. (#4294)
Fix deleting E2E room keys when using old SQLite versions. (#4295)
The metric synapse_admin_mau:current previously did not update when config.mau_stats_only was set to True (#4305)
Fixed per-room account data filters (#4309)
Fix indentation in default config (#4313)
Fix synapse:latest docker upload (#4316)
Fix test_metric.py compatibility with prometheus_client 0.5. Contributed by Maarten de Vries maarten@de-vri.es. (#4317)
Avoid packaging _trial_temp directory in -py3 debian packages (#4326)
Check jinja version for consent resource (#4327)
fix NPE in /messages by checking if all events were filtered out (#4330)
Fix python -m synapse.config on Python 3. (#4356)

Deprecations and Removals

Remove the deprecated v1/register API on Python 2. It was never ported to Python 3. (#4334)

Internal Changes

Getting URL previews of IP addresses no longer fails on Python 3. (#4215)
drop undocumented dependency on dateutil (#4266)
Update the example systemd config to use a virtualenv (#4273)
Update link to kernel DCO guide (#4274)
Make isort tox check print diff when it fails (#4283)
Log room_id in Unknown room errors (#4297)
Documentation improvements for coturn setup. Contributed by Krithin Sitaram. (#4333)
Update pull request template to use absolute links (#4341)
Update README to not lie about required restart when updating TLS certificates (#4343)
Update debian packaging for compatibility with transitional package (#4349)
Fix command hint to generate a config file when trying to start without a config file (#4353)
Add better logging for unexpected errors while sending transactions (#4358)

Synapse 0.34.0 (2018-12-20)

Synapse 0.34.0 is the first release to fully support Python 3. Synapse will now run on Python versions 3.5 or 3.6 (as well as 2.7). Support for Python 3.7 remains experimental.

We recommend upgrading to Python 3, but make sure to read the upgrade notes when doing so.

Features

Add 'sandbox' to CSP for media reprository (#4284)
Make the new landing page prettier. (#4294)
Fix deleting E2E room keys when using old SQLite versions. (#4295)
Add a welcome page for the client API port. Credit to @krombel! (#4289)
Remove Matrix console from the default distribution (#4290)
Add option to track MAU stats (but not limit people) (#3830)
Add an option to enable recording IPs for appservice users (#3831)
Rename login type m.login.cas to m.login.sso (#4220)
Add an option to disable search for homeservers that may not be interested in it. (#4230)

Bugfixes

Pushrules can now again be made with non-ASCII rule IDs. (#4165)
The media repository now no longer fails to decode UTF-8 filenames when downloading remote media. (#4176)
URL previews now correctly decode non-UTF-8 text if the header contains a <meta http-equiv="Content-Type" header. (#4183)
Fix an issue where public consent URLs had two slashes. (#4192)
Fallback auth now accepts the session parameter on Python 3. (#4197)
Remove riot.im from the list of trusted Identity Servers in the default configuration (#4207)
fix start up failure when mau_limit_reserved_threepids set and db is postgres (#4211)
Fix auto join failures for servers that require user consent (#4223)
Fix exception caused by non-ascii event IDs (#4241)
Pushers can now be unsubscribed from on Python 3. (#4250)
Fix UnicodeDecodeError when postgres is configured to give non-English errors (#4253)

Internal Changes

Debian packages utilising a virtualenv with bundled dependencies can now be built. (#4212)
Disable pager when running git-show in CI (#4291)
A coveragerc file has been added. (#4180)
Add a GitHub pull request template and add multiple issue templates (#4182)
Update README to reflect the fact that #1491 is fixed (#4188)
Run the AS senders as background processes to fix warnings (#4189)
Add some diagnostics to the tests to detect logcontext problems (#4190)
Add missing jpeg package prerequisite for OpenBSD in README. (#4193)
Add a note saying you need to manually reclaim disk space after using the Purge History API (#4200)
More logcontext checking in unittests (#4205)
Ignore __pycache__ directories in the database schema folder (#4214)
Add note to UPGRADE.rst about removing riot.im from list of trusted identity servers (#4224)
Added automated coverage reporting to CI. (#4225)
Garbage-collect after each unit test to fix logcontext leaks (#4227)
add more detail to logging regarding "More than one row matched" error (#4234)
Drop sent_transactions table (#4244)
Add a basic .editorconfig (#4257)
Update README.rst and UPGRADE.rst for Python 3. (#4260)
Remove obsolete verbose and log_file settings from homeserver.yaml for Docker image. (#4261)

Synapse 0.33.9 (2018-11-19)

No significant changes.

Synapse 0.33.9rc1 (2018-11-14)

Features

Include flags to optionally add m.login.terms to the registration flow when consent tracking is enabled. (#4004, #4133, #4142, #4184)
Support for replacing rooms with new ones (#4091, #4099, #4100, #4101)

Bugfixes

Fix exceptions when using the email mailer on Python 3. (#4095)
Fix e2e key backup with more than 9 backup versions (#4113)
Searches that request profile info now no longer fail with a 500. (#4122)
fix return code of empty key backups (#4123)
If the typing stream ID goes backwards (as on a worker when the master restarts), the worker's typing handler will no longer erroneously report rooms containing new typing events. (#4127)
Fix table lock of device_lists_remote_cache which could freeze the application (#4132)
Fix exception when using state res v2 algorithm (#4135)
Generating the user consent URI no longer fails on Python 3. (#4140, #4163)
Loading URL previews from the DB cache on Postgres will no longer cause Unicode type errors when responding to the request, and URL previews will no longer fail if the remote server returns a Content-Type header with the chartype in quotes. (#4157)
The hash_password script now works on Python 3. (#4161)
Fix noop checks when updating device keys, reducing spurious device list update notifications. (#4164)

Deprecations and Removals

The disused and un-specced identicon generator has been removed. (#4106)
The obsolete and non-functional /pull federation endpoint has been removed. (#4118)
The deprecated v1 key exchange endpoints have been removed. (#4119)
Synapse will no longer fetch keys using the fallback deprecated v1 key exchange method and will now always use v2. (#4120)

Internal Changes

Fix build of Docker image with docker-compose (#3778)
Delete unreferenced state groups during history purge (#4006)
The "Received rdata" log messages on workers is now logged at DEBUG, not INFO. (#4108)
Reduce replication traffic for device lists (#4109)
Fix synapse_replication_tcp_protocol_*_commands metric label to be full command name, rather than just the first character (#4110)
Log some bits about room creation (#4121)
Fix tox failure on old systems (#4124)
Add STATE_V2_TEST room version (#4128)
Clean up event accesses and tests (#4137)
The default logging config will now set an explicit log file encoding of UTF-8. (#4138)
Add helpers functions for getting prev and auth events of an event (#4139)
Add some tests for the HTTP pusher. (#4149)
add purge_history.sh and purge_remote_media.sh scripts to contrib/ (#4155)
HTTP tests have been refactored to contain less boilerplate. (#4156)
Drop incoming events from federation for unknown rooms (#4165)

Synapse 0.33.8 (2018-11-01)

No significant changes.

Synapse 0.33.8rc2 (2018-10-31)

Bugfixes

Searches that request profile info now no longer fail with a 500. Fixes a regression in 0.33.8rc1. (#4122)

Synapse 0.33.8rc1 (2018-10-29)

Features

Servers with auto-join rooms will now automatically create those rooms when the first user registers (#3975)
Add config option to control alias creation (#4051)
The register_new_matrix_user script is now ported to Python 3. (#4085)
Configure Docker image to listen on both ipv4 and ipv6. (#4089)

Bugfixes

Fix HTTP error response codes for federated group requests. (#3969)
Fix issue where Python 3 users couldn't paginate /publicRooms (#4046)
Fix URL previewing to work in Python 3.7 (#4050)
synctl will use the right python executable to run worker processes (#4057)
Manhole now works again on Python 3, instead of failing with a "couldn't match all kex parts" when connecting. (#4060, #4067)
Fix some metrics being racy and causing exceptions when polled by Prometheus. (#4061)
Fix bug which prevented email notifications from being sent unless an absolute path was given for email_templates. (#4068)
Correctly account for cpu usage by background threads (#4074)
Fix race condition where config defined reserved users were not being added to the monthly active user list prior to the homeserver reactor firing up (#4081)
Fix bug which prevented backslashes being used in event field filters (#4083)

Internal Changes

Add information about the matrix-docker-ansible-deploy playbook (#3698)
Add initial implementation of new state resolution algorithm (#3786)
Reduce database load when fetching state groups (#4011)
Various cleanups in the federation client code (#4031)
Run the CircleCI builds in docker containers (#4041)
Only colourise synctl output when attached to tty (#4049)
Refactor room alias creation code (#4063)
Make the Python scripts in the top-level scripts folders meet pep8 and pass flake8. (#4068)
The README now contains example for the Caddy web server. Contributed by steamp0rt. (#4072)
Add psutil as an explicit dependency (#4073)
Clean up threading and logcontexts in pushers (#4075)
Correctly manage logcontexts during startup to fix some "Unexpected logging context" warnings (#4076)
Give some more things logcontexts (#4077)
Clean up some bits of code which were flagged by the linter (#4082)

Synapse 0.33.7 (2018-10-18)

Warning: This release removes the example email notification templates from res/templates (they are now internal to the python package). This should only affect you if you (a) deploy your Synapse instance from a git checkout or a github snapshot URL, and (b) have email notifications enabled.

If you have email notifications enabled, you should ensure that email.template_dir is either configured to point at a directory where you have installed customised templates, or leave it unset to use the default templates.

Synapse 0.33.7rc2 (2018-10-17)

Features

Ship the example email templates as part of the package (#4052)

Bugfixes

Fix bug which made get_missing_events return too few events (#4045)

Synapse 0.33.7rc1 (2018-10-15)

Features

Add support for end-to-end key backup (MSC1687) (#4019)

Bugfixes

Fix bug in event persistence logic which caused 'NoneType is not iterable' (#3995)
Fix exception in background metrics collection (#3996)
Fix exception handling in fetching remote profiles (#3997)
Fix handling of rejected threepid invites (#3999)
Workers now start on Python 3. (#4027)
Synapse now starts on Python 3.7. (#4033)

Internal Changes

Log exceptions in looping calls (#4008)
Optimisation for serving federation requests (#4017)
Add metric to count number of non-empty sync responses (#4022)

Synapse 0.33.6 (2018-10-04)

Internal Changes

Pin to prometheus_client<0.4 to avoid renaming all of our metrics (#4002)

Synapse 0.33.6rc1 (2018-10-03)

Features

Adding the ability to change MAX_UPLOAD_SIZE for the docker container variables. (#3883)
Report "python_version" in the phone home stats (#3894)
Always LL ourselves if we're in a room (#3916)
Include eventid in log lines when processing incoming federation transactions (#3959)
Remove spurious check which made 'localhost' servers not work (#3964)

Bugfixes

Fix problem when playing media from Chrome using direct URL (thanks @remjey!) (#3578)
support registering regular users non-interactively with register_new_matrix_user script (#3836)
Fix broken invite email links for self hosted riots (#3868)
Don't ratelimit autojoins (#3879)
Fix 500 error when deleting unknown room alias (#3889)
Fix some b'abcd' noise in logs and metrics (#3892, #3895)
When we join a room, always try the server we used for the alias lookup first, to avoid unresponsive and out-of-date servers. (#3899)
Fix incorrect server-name indication for outgoing federation requests (#3907)
Fix adding client IPs to the database failing on Python 3. (#3908)
Fix bug where things occaisonally were not being timed out correctly. (#3910)
Fix bug where outbound federation would stop talking to some servers when using workers (#3914)
Fix some instances of ExpiringCache not expiring cache items (#3932, #3980)
Fix out-of-bounds error when LLing yourself (#3936)
Sending server notices regarding user consent now works on Python 3. (#3938)
Fix exceptions from metrics handler (#3956)
Fix error message for events with m.room.create missing from auth_events (#3960)
Fix errors due to concurrent monthly_active_user upserts (#3961)
Fix exceptions when processing incoming events over federation (#3968)
Replaced all occurences of e.message with str(e). Contributed by Schnuffle (#3970)
Fix lazy loaded sync in the presence of rejected state events (#3986)
Fix error when logging incomplete HTTP requests (#3990)

Internal Changes

Unit tests can now be run under PostgreSQL in Docker using test_postgresql.sh. (#3699)
Speed up calculation of typing updates for replication (#3794)
Remove documentation regarding installation on Cygwin, the use of WSL is recommended instead. (#3873)
Fix typo in README, synaspse -> synapse (#3897)
Increase the timeout when filling missing events in federation requests (#3903)
Improve the logging when handling a federation transaction (#3904, #3966)
Improve logging of outbound federation requests (#3906, #3909)
Fix the docker image building on python 3 (#3911)
Add a regression test for logging failed HTTP requests on Python 3. (#3912)
Comments and interface cleanup for on_receive_pdu (#3924)
Fix spurious exceptions when remote http client closes conncetion (#3925)
Log exceptions thrown by background tasks (#3927)
Add a cache to get_destination_retry_timings (#3933, #3991)
Automate pushes to docker hub (#3946)
Require attrs 16.0.0 or later (#3947)
Fix incompatibility with python3 on alpine (#3948)
Run the test suite on the oldest supported versions of our dependencies in CI. (#3952)
CircleCI now only runs merged jobs on PRs, and commit jobs on develop, master, and release branches. (#3957)
Fix docstrings and add tests for state store methods (#3958)
fix docstring for FederationClient.get_state_for_room (#3963)
Run notify_app_services as a bg process (#3965)
Clarifications in FederationHandler (#3967)
Further reduce the docker image size (#3972)
Build py3 docker images for docker hub too (#3976)
Updated the installation instructions to point to the matrix-synapse package on PyPI. (#3985)
Disable USE_FROZEN_DICTS for unittests by default. (#3987)
Remove unused Jenkins and development related files from the repo. (#3988)
Improve stacktraces in certain exceptions in the logs (#3989)

Synapse 0.33.5.1 (2018-09-25)

Internal Changes

Fix incompatibility with older Twisted version in tests. Thanks @OlegGirko! (#3940)

Synapse 0.33.5 (2018-09-24)

No significant changes.

Synapse 0.33.5rc1 (2018-09-17)

Features

Python 3.5 and 3.6 support is now in beta. (#3576)
Implement event_format filter param in /sync (#3790)
Add synapse_admin_mau:registered_reserved_users metric to expose number of real reaserved users (#3846)

Bugfixes

Remove connection ID for replication prometheus metrics, as it creates a large number of new series. (#3788)
guest users should not be part of mau total (#3800)
Bump dependency on pyopenssl 16.x, to avoid incompatibility with recent Twisted. (#3804)
Fix existing room tags not coming down sync when joining a room (#3810)
Fix jwt import check (#3824)
fix VOIP crashes under Python 3 (#3821) (#3835)
Fix manhole so that it works with latest openssh clients (#3841)
Fix outbound requests occasionally wedging, which can result in federation breaking between servers. (#3845)
Show heroes if room name/canonical alias has been deleted (#3851)
Fix handling of redacted events from federation (#3859)
(#3874)
Mitigate outbound federation randomly becoming wedged (#3875)

Internal Changes

CircleCI tests now run on the potential merge of a PR. (#3704)
http/ is now ported to Python 3. (#3771)
Improve human readable error messages for threepid registration/account update (#3789)
Make /sync slightly faster by avoiding needless copies (#3795)
handlers/ is now ported to Python 3. (#3803)
Limit the number of PDUs/EDUs per federation transaction (#3805)
Only start postgres instance for postgres tests on Travis CI (#3806)
tests/ is now ported to Python 3. (#3808)
crypto/ is now ported to Python 3. (#3822)
rest/ is now ported to Python 3. (#3823)
add some logging for the keyring queue (#3826)
speed up lazy loading by 2-3x (#3827)
Improved Dockerfile to remove build requirements after building reducing the image size. (#3834)
Disable lazy loading for incremental syncs for now (#3840)
federation/ is now ported to Python 3. (#3847)
Log when we retry outbound requests (#3853)
Removed some excess logging messages. (#3855)
Speed up purge history for rooms that have been previously purged (#3856)
Refactor some HTTP timeout code. (#3857)
Fix running merged builds on CircleCI (#3858)
Fix typo in replication stream exception. (#3860)
Add in flight real time metrics for Measure blocks (#3871)
Disable buffering and automatic retrying in treq requests to prevent timeouts. (#3872)
mention jemalloc in the README (#3877)
Remove unmaintained "nuke-room-from-db.sh" script (#3888)

Synapse 0.33.4 (2018-09-07)

Internal Changes

Unignore synctl in .dockerignore to fix docker builds (#3802)

Synapse 0.33.4rc2 (2018-09-06)

Pull in security fixes from v0.33.3.1

Synapse 0.33.3.1 (2018-09-06)

SECURITY FIXES

Fix an issue where event signatures were not always correctly validated (#3796)
Fix an issue where server_acls could be circumvented for incoming events (#3796)

Internal Changes

Unignore synctl in .dockerignore to fix docker builds (#3802)

Synapse 0.33.4rc1 (2018-09-04)

Features

Support profile API endpoints on workers (#3659)
Server notices for resource limit blocking (#3680)
Allow guests to use /rooms/:roomId/event/:eventId (#3724)
Add mau_trial_days config param, so that users only get counted as MAU after N days. (#3749)
Require twisted 17.1 or later (fixes #3741). (#3751)

Bugfixes

Fix error collecting prometheus metrics when run on dedicated thread due to threading concurrency issues (#3722)
Fix bug where we resent "limit exceeded" server notices repeatedly (#3747)
Fix bug where we broke sync when using limit_usage_by_mau but hadn't configured server notices (#3753)
Fix 'federation_domain_whitelist' such that an empty list correctly blocks all outbound federation traffic (#3754)
Fix tagging of server notice rooms (#3755, #3756)
Fix 'admin_uri' config variable and error parameter to be 'admin_contact' to match the spec. (#3758)
Don't return non-LL-member state in incremental sync state blocks (#3760)
Fix bug in sending presence over federation (#3768)
Fix bug where preserved threepid user comes to sign up and server is mau blocked (#3777)

Internal Changes

Removed the link to the unmaintained matrix-synapse-auto-deploy project from the readme. (#3378)
Refactor state module to support multiple room versions (#3673)
The synapse.storage module has been ported to Python 3. (#3725)
Split the state_group_cache into member and non-member state events (and so speed up LL /sync) (#3726)
Log failure to authenticate remote servers as warnings (without stack traces) (#3727)
The CONTRIBUTING guidelines have been updated to mention our use of Markdown and that .misc files have content. (#3730)
Reference the need for an HTTP replication port when using the federation_reader worker (#3734)
Fix minor spelling error in federation client documentation. (#3735)
Remove redundant state resolution function (#3737)
The test suite now passes on PostgreSQL. (#3740)
Fix MAU cache invalidation due to missing yield (#3746)
Make sure that we close db connections opened during init (#3764)

Synapse 0.33.3 (2018-08-22)

Bugfixes

Fix bug introduced in v0.33.3rc1 which made the ToS give a 500 error (#3732)

Synapse 0.33.3rc2 (2018-08-21)

Bugfixes

Fix bug in v0.33.3rc1 which caused infinite loops and OOMs (#3723)

Synapse 0.33.3rc1 (2018-08-21)

Features

Add support for the SNI extension to federation TLS connections. Thanks to @vojeroen! (#3439)
Add /_media/r0/config (#3184)
speed up /members API and add at and membership params as per MSC1227 (#3568)
implement summary block in /sync response as per MSC688 (#3574)
Add lazy-loading support to /messages as per MSC1227 (#3589)
Add ability to limit number of monthly active users on the server (#3633)
Support more federation endpoints on workers (#3653)
Basic support for room versioning (#3654)
Ability to disable client/server Synapse via conf toggle (#3655)
Ability to whitelist specific threepids against monthly active user limiting (#3662)
Add some metrics for the appservice and federation event sending loops (#3664)
Where server is disabled, block ability for locked out users to read new messages (#3670)
set admin uri via config, to be used in error messages where the user should contact the administrator (#3687)
Synapse's presence functionality can now be disabled with the "use_presence" configuration option. (#3694)
For resource limit blocked users, prevent writing into rooms (#3708)

Bugfixes

Fix occasional glitches in the synapse_event_persisted_position metric (#3658)
Fix bug on deleting 3pid when using identity servers that don't support unbind API (#3661)
Make the tests pass on Twisted < 18.7.0 (#3676)
Don’t ship recaptcha_ajax.js, use it directly from Google (#3677)
Fixes test_reap_monthly_active_users so it passes under postgres (#3681)
Fix mau blocking calulation bug on login (#3689)
Fix missing yield in synapse.storage.monthly_active_users.initialise_reserved_users (#3692)
Improve HTTP request logging to include all requests (#3700)
Avoid timing out requests while we are streaming back the response (#3701)
Support more federation endpoints on workers (#3705, #3713)
Fix "Starting db txn 'get_all_updated_receipts' from sentinel context" warning (#3710)
Fix bug where state_cache cache factor ignored environment variables (#3719)

Deprecations and Removals

The Shared-Secret registration method of the legacy v1/register REST endpoint has been removed. For a replacement, please see the admin/register API documentation. (#3703)

Internal Changes

The test suite now can run under PostgreSQL. (#3423)
Refactor HTTP replication endpoints to reduce code duplication (#3632)
Tests now correctly execute on Python 3. (#3647)
Sytests can now be run inside a Docker container. (#3660)
Port over enough to Python 3 to allow the sytests to start. (#3668)
Update docker base image from alpine 3.7 to 3.8. (#3669)
Rename synapse.util.async to synapse.util.async_helpers to mitigate async becoming a keyword on Python 3.7. (#3678)
Synapse's tests are now formatted with the black autoformatter. (#3679)
Implemented a new testing base class to reduce test boilerplate. (#3684)
Rename MAU prometheus metrics (#3690)
add new error type ResourceLimit (#3707)
Logcontexts for replication command handlers (#3709)
Update admin register API documentation to reference a real user ID. (#3712)

Synapse 0.33.2 (2018-08-09)

No significant changes.

Synapse 0.33.2rc1 (2018-08-07)

Features

add support for the lazy_loaded_members filter as per MSC1227 (#2970)
add support for the include_redundant_members filter param as per MSC1227 (#3331)
Add metrics to track resource usage by background processes (#3553, #3556, #3604, #3610)
Add code label to synapse_http_server_response_time_seconds prometheus metric (#3554)
Add support for client_reader to handle more APIs (#3555, #3597)
make the /context API filter & lazy-load aware as per MSC1227 (#3567)
Add ability to limit number of monthly active users on the server (#3630)
When we fail to join a room over federation, pass the error code back to the client. (#3639)
Add a new /admin/register API for non-interactively creating users. (#3415)

Bugfixes

Make /directory/list API return 404 for room not found instead of 400. Thanks to @fuzzmz! (#3620)
Default inviter_display_name to mxid for email invites (#3391)
Don't generate TURN credentials if no TURN config options are set (#3514)
Correctly announce deleted devices over federation (#3520)
Catch failures saving metrics captured by Measure, and instead log the faulty metrics information for further analysis. (#3548)
Unicode passwords are now normalised before hashing, preventing the instance where two different devices or browsers might send a different UTF-8 sequence for the password. (#3569)
Fix potential stack overflow and deadlock under heavy load (#3570)
Respond with M_NOT_FOUND when profiles are not found locally or over federation. Fixes #3585 (#3585)
Fix failure to persist events over federation under load (#3601)
Fix updating of cached remote profiles (#3605)
Fix 'tuple index out of range' error (#3607)
Only import secrets when available (fix for py < 3.6) (#3626)

Internal Changes

Remove redundant checks on who_forgot_in_room (#3350)
Remove unnecessary event re-signing hacks (#3367)
Rewrite cache list decorator (#3384)
Move v1-only REST APIs into their own module. (#3460)
Replace more instances of Python 2-only iteritems and itervalues uses. (#3562)
Refactor EventContext to accept state during init (#3577)
Improve Dockerfile and docker-compose instructions (#3543)
Release notes are now in the Markdown format. (#3552)
add config for pep8 (#3559)
Merge Linearizer and Limiter (#3571, #3572)
Lazily load state on master process when using workers to reduce DB consumption (#3579, #3581, #3582, #3584)
Fixes and optimisations for resolve_state_groups (#3586)
Improve logging for exceptions when handling PDUs (#3587)
Add some measure blocks to persist_events (#3590)
Fix some random logcontext leaks. (#3591, #3606)
Speed up calculating state deltas in persist_event loop (#3592)
Attempt to reduce amount of state pulled out of DB during persist_events (#3595)
Fix a documentation typo in on_make_leave_request (#3609)
Make EventStore inherit from EventFederationStore (#3612)
Remove some redundant joins on event_edges.room_id (#3613)
Stop populating events.content (#3614)
Update the /send_leave path registration to use event_id rather than a transaction ID. (#3616)
Refactor FederationHandler to move DB writes into separate functions (#3621)
Remove unused field "pdu_failures" from transactions. (#3628)
rename replication_layer to federation_client (#3634)
Factor out exception handling in federation_client (#3638)
Refactor location of docker build script. (#3644)
Update CONTRIBUTING to mention newsfragments. (#3645)

Synapse 0.33.1 (2018-08-02)

SECURITY FIXES

Fix a potential issue where servers could request events for rooms they have not joined. (#3641)
Fix a potential issue where users could see events in private rooms before they joined. (#3642)

Synapse 0.33.0 (2018-07-19)

Bugfixes

Disable a noisy warning about logcontexts. (#3561)

Synapse 0.33.0rc1 (2018-07-18)

Features

Enforce the specified API for report_event. (#3316)
Include CPU time from database threads in request/block metrics. (#3496, #3501)
Add CPU metrics for _fetch_event_list. (#3497)
Optimisation to make handling incoming federation requests more efficient. (#3541)

Bugfixes

Fix a significant performance regression in /sync. (#3505, #3521, #3530, #3544)
Use more portable syntax in our use of the attrs package, widening the supported versions. (#3498)
Fix queued federation requests being processed in the wrong order. (#3533)
Ensure that erasure requests are correctly honoured for publicly accessible rooms when accessed over federation. (#3546)

Misc

Refactoring to improve testability. (#3351, #3499)
Use isort to sort imports. (#3463, #3464, #3540)
Use parse and asserts from http.servlet. (#3534, #3535).

Synapse 0.32.2 (2018-07-07)

Bugfixes

Amend the Python dependencies to depend on attrs from PyPI, not attr (#3492)

Synapse 0.32.1 (2018-07-06)

Bugfixes

Add explicit dependency on netaddr (#3488)

Changes in synapse v0.32.0 (2018-07-06)

No changes since 0.32.0rc1

Synapse 0.32.0rc1 (2018-07-05)

Features

Add blacklist & whitelist of servers allowed to send events to a room via m.room.server_acl event.
Cache factor override system for specific caches (#3334)
Add metrics to track appservice transactions (#3344)
Try to log more helpful info when a sig verification fails (#3372)
Synapse now uses the best performing JSON encoder/decoder according to your runtime (simplejson on CPython, stdlib json on PyPy). (#3462)
Add optional ip_range_whitelist param to AS registration files to lock AS IP access (#3465)
Reject invalid server names in federation requests (#3480)
Reject invalid server names in homeserver.yaml (#3483)

Bugfixes

Strip access_token from outgoing requests (#3327)
Redact AS tokens in logs (#3349)
Fix federation backfill from SQLite servers (#3355)
Fix event-purge-by-ts admin API (#3363)
Fix event filtering in get_missing_events handler (#3371)
Synapse is now stricter regarding accepting events which it cannot retrieve the prev_events for. (#3456)
Fix bug where synapse would explode when receiving unicode in HTTP User-Agent header (#3470)
Invalidate cache on correct thread to avoid race (#3473)

Improved Documentation

doc/postgres.rst: fix display of the last command block. Thanks to @ArchangeGabriel! (#3340)

Deprecations and Removals

Remove was_forgotten_at (#3324)

Misc

#3332, #3341, #3347, #3348, #3356, #3385, #3446, #3447, #3467, #3474

Changes in synapse v0.31.2 (2018-06-14)

SECURITY UPDATE: Prevent unauthorised users from setting state events in a room when there is no m.room.power_levels event in force in the room. (PR #3397)

Discussion around the Matrix Spec change proposal for this change can be followed at https://github.com/matrix-org/matrix-doc/issues/1304.

Changes in synapse v0.31.1 (2018-06-08)

v0.31.1 fixes a security bug in the get_missing_events federation API where event visibility rules were not applied correctly.

We are not aware of it being actively exploited but please upgrade asap.

Bug Fixes:

Fix event filtering in get_missing_events handler (PR #3371)

Changes in synapse v0.31.0 (2018-06-06)

Most notable change from v0.30.0 is to switch to the python prometheus library to improve system stats reporting. WARNING: this changes a number of prometheus metrics in a backwards-incompatible manner. For more details, see docs/metrics-howto.rst.

Bug Fixes:

Fix metric documentation tables (PR #3341)
Fix LaterGauge error handling (694968f)
Fix replication metrics (b7e7fd2)

Changes in synapse v0.31.0-rc1 (2018-06-04)

Features:

Switch to the Python Prometheus library (PR #3256, #3274)
Let users leave the server notice room after joining (PR #3287)

Changes:

daily user type phone home stats (PR #3264)
Use iter* methods for _filter_events_for_server (PR #3267)
Docs on consent bits (PR #3268)
Remove users from user directory on deactivate (PR #3277)
Avoid sending consent notice to guest users (PR #3288)
disable CPUMetrics if no /proc/self/stat (PR #3299)
Consistently use six\'s iteritems and wrap lazy keys/values in list() if they\'re not meant to be lazy (PR #3307)
Add private IPv6 addresses to example config for url preview blacklist (PR #3317) Thanks to @thegcat!
Reduce stuck read-receipts: ignore depth when updating (PR #3318)
Put python\'s logs into Trial when running unit tests (PR #3319)

Changes, python 3 migration:

Replace some more comparisons with six (PR #3243) Thanks to @NotAFile!
replace some iteritems with six (PR #3244) Thanks to @NotAFile!
Add batch_iter to utils (PR #3245) Thanks to @NotAFile!
use repr, not str (PR #3246) Thanks to @NotAFile!
Misc Python3 fixes (PR #3247) Thanks to @NotAFile!
Py3 storage/_base.py (PR #3278) Thanks to @NotAFile!
more six iteritems (PR #3279) Thanks to @NotAFile!
More Misc. py3 fixes (PR #3280) Thanks to @NotAFile!
remaining isintance fixes (PR #3281) Thanks to @NotAFile!
py3-ize state.py (PR #3283) Thanks to @NotAFile!
extend tox testing for py3 to avoid regressions (PR #3302) Thanks to @krombel!
use memoryview in py3 (PR #3303) Thanks to @NotAFile!

Bugs:

Fix federation backfill bugs (PR #3261)
federation: fix LaterGauge usage (PR #3328) Thanks to @intelfx!

Changes in synapse v0.30.0 (2018-05-24)

\'Server Notices\' are a new feature introduced in Synapse 0.30. They provide a channel whereby server administrators can send messages to users on the server.

They are used as part of communication of the server policies (see docs/consent_tracking.md), however the intention is that they may also find a use for features such as \"Message of the day\".

This feature is specific to Synapse, but uses standard Matrix communication mechanisms, so should work with any Matrix client. For more details see docs/server_notices.md

Further Server Notices/Consent Tracking Support:

Allow overriding the server_notices user\'s avatar (PR #3273)
Use the localpart in the consent uri (PR #3272)
Support for putting %(consent_uri)s in messages (PR #3271)
Block attempts to send server notices to remote users (PR #3270)
Docs on consent bits (PR #3268)

Changes in synapse v0.30.0-rc1 (2018-05-23)

Server Notices/Consent Tracking Support:

ConsentResource to gather policy consent from users (PR #3213)
Move RoomCreationHandler out of synapse.handlers.Handlers (PR #3225)
Infrastructure for a server notices room (PR #3232)
Send users a server notice about consent (PR #3236)
Reject attempts to send event before privacy consent is given (PR #3257)
Add a \'has_consented\' template var to consent forms (PR #3262)
Fix dependency on jinja2 (PR #3263)

Features:

Cohort analytics (PR #3163, #3241, #3251)
Add lxml to docker image for web previews (PR #3239) Thanks to @ptman!
Add in flight request metrics (PR #3252)

Changes:

Remove unused update_external_syncs (PR #3233)
Use stream rather depth ordering for push actions (PR #3212)
Make purge_history operate on tokens (PR #3221)
Don\'t support limitless pagination (PR #3265)

Bug Fixes:

Fix logcontext resource usage tracking (PR #3258)
Fix error in handling receipts (PR #3235)
Stop the transaction cache caching failures (PR #3255)

Changes in synapse v0.29.1 (2018-05-17)

Changes:

Update docker documentation (PR #3222)

Changes in synapse v0.29.0 (2018-05-16)

Not changes since v0.29.0-rc1

Changes in synapse v0.29.0-rc1 (2018-05-14)

Notable changes, a docker file for running Synapse (Thanks to @kaiyou!) and a closed spec bug in the Client Server API. Additionally further prep for Python 3 migration.

Potentially breaking change:

Make Client-Server API return 401 for invalid token (PR #3161).

This changes the Client-server spec to return a 401 error code instead of 403 when the access token is unrecognised. This is the behaviour required by the specification, but some clients may be relying on the old, incorrect behaviour.

Thanks to @NotAFile for fixing this.

Features:

Add a Dockerfile for synapse (PR #2846) Thanks to @kaiyou!

Changes - General:

nuke-room-from-db.sh: added postgresql option and help (PR #2337) Thanks to @rubo77!
Part user from rooms on account deactivate (PR #3201)
Make \'unexpected logging context\' into warnings (PR #3007)
Set Server header in SynapseRequest (PR #3208)
remove duplicates from groups tables (PR #3129)
Improve exception handling for background processes (PR #3138)
Add missing consumeErrors to improve exception handling (PR #3139)
reraise exceptions more carefully (PR #3142)
Remove redundant call to preserve_fn (PR #3143)
Trap exceptions thrown within run_in_background (PR #3144)

Changes - Refactors:

Refactor /context to reuse pagination storage functions (PR #3193)
Refactor recent events func to use pagination func (PR #3195)
Refactor pagination DB API to return concrete type (PR #3196)
Refactor get_recent_events_for_room return type (PR #3198)
Refactor sync APIs to reuse pagination API (PR #3199)
Remove unused code path from member change DB func (PR #3200)
Refactor request handling wrappers (PR #3203)
transaction_id, destination defined twice (PR #3209) Thanks to @damir-manapov!
Refactor event storage to prepare for changes in state calculations (PR #3141)
Set Server header in SynapseRequest (PR #3208)
Use deferred.addTimeout instead of time_bound_deferred (PR #3127, #3178)
Use run_in_background in preference to preserve_fn (PR #3140)

Changes - Python 3 migration:

Construct HMAC as bytes on py3 (PR #3156) Thanks to @NotAFile!
run config tests on py3 (PR #3159) Thanks to @NotAFile!
Open certificate files as bytes (PR #3084) Thanks to @NotAFile!
Open config file in non-bytes mode (PR #3085) Thanks to @NotAFile!
Make event properties raise AttributeError instead (PR #3102) Thanks to @NotAFile!
Use six.moves.urlparse (PR #3108) Thanks to @NotAFile!
Add py3 tests to tox with folders that work (PR #3145) Thanks to @NotAFile!
Don\'t yield in list comprehensions (PR #3150) Thanks to @NotAFile!
Move more xrange to six (PR #3151) Thanks to @NotAFile!
make imports local (PR #3152) Thanks to @NotAFile!
move httplib import to six (PR #3153) Thanks to @NotAFile!
Replace stringIO imports with six (PR #3154, #3168) Thanks to @NotAFile!
more bytes strings (PR #3155) Thanks to @NotAFile!

Bug Fixes:

synapse fails to start under Twisted >= 18.4 (PR #3157)
Fix a class of logcontext leaks (PR #3170)
Fix a couple of logcontext leaks in unit tests (PR #3172)
Fix logcontext leak in media repo (PR #3174)
Escape label values in prometheus metrics (PR #3175, #3186)
Fix \'Unhandled Error\' logs with Twisted 18.4 (PR #3182) Thanks to @Half-Shot!
Fix logcontext leaks in rate limiter (PR #3183)
notifications: Convert next_token to string according to the spec (PR #3190) Thanks to @mujx!
nuke-room-from-db.sh: fix deletion from search table (PR #3194) Thanks to @rubo77!
add guard for None on purge_history api (PR #3160) Thanks to @krombel!

Changes in synapse v0.28.1 (2018-05-01)

SECURITY UPDATE

Clamp the allowed values of event depth received over federation to be [0, 2\^63 - 1]. This mitigates an attack where malicious events injected with depth = 2\^63 - 1 render rooms unusable. Depth is used to determine the cosmetic ordering of events within a room, and so the ordering of events in such a room will default to using stream_ordering rather than depth (topological_ordering).

This is a temporary solution to mitigate abuse in the wild, whilst a long term solution is being implemented to improve how the depth parameter is used.

Full details at https://docs.google.com/document/d/1I3fi2S-XnpO45qrpCsowZv8P8dHcNZ4fsBsbOW7KABI
Pin Twisted to <18.4 until we stop using the private _OpenSSLECCurve API.

Changes in synapse v0.28.0 (2018-04-26)

Bug Fixes:

Fix quarantine media admin API and search reindex (PR #3130)
Fix media admin APIs (PR #3134)

Changes in synapse v0.28.0-rc1 (2018-04-24)

Minor performance improvement to federation sending and bug fixes.

(Note: This release does not include the delta state resolution implementation discussed in matrix live)

Features:

Add metrics for event processing lag (PR #3090)
Add metrics for ResponseCache (PR #3092)

Changes:

Synapse on PyPy (PR #2760) Thanks to @Valodim!
move handling of auto_join_rooms to RegisterHandler (PR #2996) Thanks to @krombel!
Improve handling of SRV records for federation connections (PR #3016) Thanks to @silkeh!
Document the behaviour of ResponseCache (PR #3059)
Preparation for py3 (PR #3061, #3073, #3074, #3075, #3103, #3104, #3106, #3107, #3109, #3110) Thanks to @NotAFile!
update prometheus dashboard to use new metric names (PR #3069) Thanks to @krombel!
use python3-compatible prints (PR #3074) Thanks to @NotAFile!
Send federation events concurrently (PR #3078)
Limit concurrent event sends for a room (PR #3079)
Improve R30 stat definition (PR #3086)
Send events to ASes concurrently (PR #3088)
Refactor ResponseCache usage (PR #3093)
Clarify that SRV may not point to a CNAME (PR #3100) Thanks to @silkeh!
Use str(e) instead of e.message (PR #3103) Thanks to @NotAFile!
Use six.itervalues in some places (PR #3106) Thanks to @NotAFile!
Refactor store.have_events (PR #3117)

Bug Fixes:

Return 401 for invalid access_token on logout (PR #2938) Thanks to @dklug!
Return a 404 rather than a 500 on rejoining empty rooms (PR #3080)
fix federation_domain_whitelist (PR #3099)
Avoid creating events with huge numbers of prev_events (PR #3113)
Reject events which have lots of prev_events (PR #3118)

Changes in synapse v0.27.4 (2018-04-13)

Changes:

Update canonicaljson dependency (#3095)

Changes in synapse v0.27.3 (2018-04-11)

Bug fixes:

URL quote path segments over federation (#3082)

Changes in synapse v0.27.3-rc2 (2018-04-09)

v0.27.3-rc1 used a stale version of the develop branch so the changelog overstates the functionality. v0.27.3-rc2 is up to date, rc1 should be ignored.

Changes in synapse v0.27.3-rc1 (2018-04-09)

Notable changes include API support for joinability of groups. Also new metrics and phone home stats. Phone home stats include better visibility of system usage so we can tweak synpase to work better for all users rather than our own experience with matrix.org. Also, recording \'r30\' stat which is the measure we use to track overal growth of the Matrix ecosystem. It is defined as:-

Counts the number of native 30 day retained users, defined as:- * Users who have created their accounts more than 30 days

: - Where last seen at most 30 days ago

-   Where account creation and last\_seen are \> 30 days\"

Features:

Add joinability for groups (PR #3045)
Implement group join API (PR #3046)
Add counter metrics for calculating state delta (PR #3033)
R30 stats (PR #3041)
Measure time it takes to calculate state group ID (PR #3043)
Add basic performance statistics to phone home (PR #3044)
Add response size metrics (PR #3071)
phone home cache size configurations (PR #3063)

Changes:

Add a blurb explaining the main synapse worker (PR #2886) Thanks to @turt2live!
Replace old style error catching with \'as\' keyword (PR #3000) Thanks to @NotAFile!
Use .iter* to avoid copies in StateHandler (PR #3006)
Linearize calls to _generate_user_id (PR #3029)
Remove last usage of ujson (PR #3030)
Use simplejson throughout (PR #3048)
Use static JSONEncoders (PR #3049)
Remove uses of events.content (PR #3060)
Improve database cache performance (PR #3068)

Bug fixes:

Add room_id to the response of rooms/{roomId}/join (PR #2986) Thanks to @jplatte!
Fix replication after switch to simplejson (PR #3015)
404 correctly on missing paths via NoResource (PR #3022)
Fix error when claiming e2e keys from offline servers (PR #3034)
fix tests/storage/test_user_directory.py (PR #3042)
use PUT instead of POST for federating groups/m.join_policy (PR #3070) Thanks to @krombel!
postgres port script: fix state_groups_pkey error (PR #3072)

Changes in synapse v0.27.2 (2018-03-26)

Bug fixes:

Fix bug which broke TCP replication between workers (PR #3015)

Changes in synapse v0.27.1 (2018-03-26)

Meta release as v0.27.0 temporarily pointed to the wrong commit

Changes in synapse v0.27.0 (2018-03-26)

No changes since v0.27.0-rc2

Changes in synapse v0.27.0-rc2 (2018-03-19)

Pulls in v0.26.1

Bug fixes:

Fix bug introduced in v0.27.0-rc1 that causes much increased memory usage in state cache (PR #3005)

Changes in synapse v0.26.1 (2018-03-15)

Bug fixes:

Fix bug where an invalid event caused server to stop functioning correctly, due to parsing and serializing bugs in ujson library (PR #3008)

Changes in synapse v0.27.0-rc1 (2018-03-14)

The common case for running Synapse is not to run separate workers, but for those that do, be aware that synctl no longer starts the main synapse when using -a option with workers. A new worker file should be added with worker_app: synapse.app.homeserver.

This release also begins the process of renaming a number of the metrics reported to prometheus. See docs/metrics-howto.rst. Note that the v0.28.0 release will remove the deprecated metric names.

Features:

Add ability for ASes to override message send time (PR #2754)
Add support for custom storage providers for media repository (PR #2867, #2777, #2783, #2789, #2791, #2804, #2812, #2814, #2857, #2868, #2767)
Add purge API features, see docs/admin_api/purge_history_api.rst for full details (PR #2858, #2867, #2882, #2946, #2962, #2943)
Add support for whitelisting 3PIDs that users can register. (PR #2813)
Add /room/{id}/event/{id} API (PR #2766)
Add an admin API to get all the media in a room (PR #2818) Thanks to @turt2live!
Add federation_domain_whitelist option (PR #2820, #2821)

Changes:

Continue to factor out processing from main process and into worker processes. See updated docs/workers.rst (PR #2892 - #2904, #2913, #2920 - #2926, #2947, #2847, #2854, #2872, #2873, #2874, #2928, #2929, #2934, #2856, #2976 - #2984, #2987 - #2989, #2991 - #2993, #2995, #2784)
Ensure state cache is used when persisting events (PR #2864, #2871, #2802, #2835, #2836, #2841, #2842, #2849)
Change the default config to bind on both IPv4 and IPv6 on all platforms (PR #2435) Thanks to @silkeh!
No longer require a specific version of saml2 (PR #2695) Thanks to @okurz!
Remove verbosity/log_file from generated config (PR #2755)
Add and improve metrics and logging (PR #2770, #2778, #2785, #2786, #2787, #2793, #2794, #2795, #2809, #2810, #2833, #2834, #2844, #2965, #2927, #2975, #2790, #2796, #2838)
When using synctl with workers, don\'t start the main synapse automatically (PR #2774)
Minor performance improvements (PR #2773, #2792)
Use a connection pool for non-federation outbound connections (PR #2817)
Make it possible to run unit tests against postgres (PR #2829)
Update pynacl dependency to 1.2.1 or higher (PR #2888) Thanks to @bachp!
Remove ability for AS users to call /events and /sync (PR #2948)
Use bcrypt.checkpw (PR #2949) Thanks to @krombel!

Bug fixes:

Fix broken ldap_config config option (PR #2683) Thanks to @seckrv!
Fix error message when user is not allowed to unban (PR #2761) Thanks to @turt2live!
Fix publicised groups GET API (singular) over federation (PR #2772)
Fix user directory when using user_directory_search_all_users config option (PR #2803, #2831)
Fix error on /publicRooms when no rooms exist (PR #2827)
Fix bug in quarantine_media (PR #2837)
Fix url_previews when no Content-Type is returned from URL (PR #2845)
Fix rare race in sync API when joining room (PR #2944)
Fix slow event search, switch back from GIST to GIN indexes (PR #2769, #2848)

Changes in synapse v0.26.0 (2018-01-05)

No changes since v0.26.0-rc1

Changes in synapse v0.26.0-rc1 (2017-12-13)

Features:

Add ability for ASes to publicise groups for their users (PR #2686)
Add all local users to the user_directory and optionally search them (PR #2723)
Add support for custom login types for validating users (PR #2729)

Changes:

Update example Prometheus config to new format (PR #2648) Thanks to @krombel!
Rename redact_content option to include_content in Push API (PR #2650)
Declare support for r0.3.0 (PR #2677)
Improve upserts (PR #2684, #2688, #2689, #2713)
Improve documentation of workers (PR #2700)
Improve tracebacks on exceptions (PR #2705)
Allow guest access to group APIs for reading (PR #2715)
Support for posting content in federation_client script (PR #2716)
Delete devices and pushers on logouts etc (PR #2722)

Bug fixes:

Fix database port script (PR #2673)
Fix internal server error on login with ldap_auth_provider (PR #2678) Thanks to @jkolo!
Fix error on sqlite 3.7 (PR #2697)
Fix OPTIONS on preview_url (PR #2707)
Fix error handling on dns lookup (PR #2711)
Fix wrong avatars when inviting multiple users when creating room (PR #2717)
Fix 500 when joining matrix-dev (PR #2719)

Changes in synapse v0.25.1 (2017-11-17)

Bug fixes:

Fix login with LDAP and other password provider modules (PR #2678). Thanks to @jkolo!

Changes in synapse v0.25.0 (2017-11-15)

Bug fixes:

Fix port script (PR #2673)

Changes in synapse v0.25.0-rc1 (2017-11-14)

Features:

Add is_public to groups table to allow for private groups (PR #2582)
Add a route for determining who you are (PR #2668) Thanks to @turt2live!
Add more features to the password providers (PR #2608, #2610, #2620, #2622, #2623, #2624, #2626, #2628, #2629)
Add a hook for custom rest endpoints (PR #2627)
Add API to update group room visibility (PR #2651)

Changes:

Ignore <noscript> tags when generating URL preview descriptions (PR #2576) Thanks to @maximevaillancourt!
Register some /unstable endpoints in /r0 as well (PR #2579) Thanks to @krombel!
Support /keys/upload on /r0 as well as /unstable (PR #2585)
Front-end proxy: pass through auth header (PR #2586)
Allow ASes to deactivate their own users (PR #2589)
Remove refresh tokens (PR #2613)
Automatically set default displayname on register (PR #2617)
Log login requests (PR #2618)
Always return is_public in the /groups/:group_id/rooms API (PR #2630)
Avoid no-op media deletes (PR #2637) Thanks to @spantaleev!
Fix various embarrassing typos around user_directory and add some doc. (PR #2643)
Return whether a user is an admin within a group (PR #2647)
Namespace visibility options for groups (PR #2657)
Downcase UserIDs on registration (PR #2662)
Cache failures when fetching URL previews (PR #2669)

Bug fixes:

Fix port script (PR #2577)
Fix error when running synapse with no logfile (PR #2581)
Fix UI auth when deleting devices (PR #2591)
Fix typo when checking if user is invited to group (PR #2599)
Fix the port script to drop NUL values in all tables (PR #2611)
Fix appservices being backlogged and not receiving new events due to a bug in notify_interested_services (PR #2631) Thanks to @xyzz!
Fix updating rooms avatar/display name when modified by admin (PR #2636) Thanks to @farialima!
Fix bug in state group storage (PR #2649)
Fix 500 on invalid utf-8 in request (PR #2663)

Changes in synapse v0.24.1 (2017-10-24)

Bug fixes:

Fix updating group profiles over federation (PR #2567)

Changes in synapse v0.24.0 (2017-10-23)

No changes since v0.24.0-rc1

Changes in synapse v0.24.0-rc1 (2017-10-19)

Features:

Add Group Server (PR #2352, #2363, #2374, #2377, #2378, #2382, #2410, #2426, #2430, #2454, #2471, #2472, #2544)
Add support for channel notifications (PR #2501)
Add basic implementation of backup media store (PR #2538)
Add config option to auto-join new users to rooms (PR #2545)

Changes:

Make the spam checker a module (PR #2474)
Delete expired url cache data (PR #2478)
Ignore incoming events for rooms that we have left (PR #2490)
Allow spam checker to reject invites too (PR #2492)
Add room creation checks to spam checker (PR #2495)
Spam checking: add the invitee to user_may_invite (PR #2502)
Process events from federation for different rooms in parallel (PR #2520)
Allow error strings from spam checker (PR #2531)
Improve error handling for missing files in config (PR #2551)

Bug fixes:

Fix handling SERVFAILs when doing AAAA lookups for federation (PR #2477)
Fix incompatibility with newer versions of ujson (PR #2483) Thanks to @jeremycline!
Fix notification keywords that start/end with non-word chars (PR #2500)
Fix stack overflow and logcontexts from linearizer (PR #2532)
Fix 500 error when fields missing from power_levels event (PR #2552)
Fix 500 error when we get an error handling a PDU (PR #2553)

Changes in synapse v0.23.1 (2017-10-02)

Changes:

Make \'affinity\' package optional, as it is not supported on some platforms

Changes in synapse v0.23.0 (2017-10-02)

No changes since v0.23.0-rc2

Changes in synapse v0.23.0-rc2 (2017-09-26)

Bug fixes:

Fix regression in performance of syncs (PR #2470)

Changes in synapse v0.23.0-rc1 (2017-09-25)

Features:

Add a frontend proxy worker (PR #2344)
Add support for event_id_only push format (PR #2450)
Add a PoC for filtering spammy events (PR #2456)
Add a config option to block all room invites (PR #2457)

Changes:

Use bcrypt module instead of py-bcrypt (PR #2288) Thanks to @kyrias!
Improve performance of generating push notifications (PR #2343, #2357, #2365, #2366, #2371)
Improve DB performance for device list handling in sync (PR #2362)
Include a sample prometheus config (PR #2416)
Document known to work postgres version (PR #2433) Thanks to @ptman!

Bug fixes:

Fix caching error in the push evaluator (PR #2332)
Fix bug where pusherpool didn\'t start and broke some rooms (PR #2342)
Fix port script for user directory tables (PR #2375)
Fix device lists notifications when user rejoins a room (PR #2443, #2449)
Fix sync to always send down current state events in timeline (PR #2451)
Fix bug where guest users were incorrectly kicked (PR #2453)
Fix bug talking to IPv6 only servers using SRV records (PR #2462)

Changes in synapse v0.22.1 (2017-07-06)

Bug fixes:

Fix bug where pusher pool didn\'t start and caused issues when interacting with some rooms (PR #2342)

Changes in synapse v0.22.0 (2017-07-06)

No changes since v0.22.0-rc2

Changes in synapse v0.22.0-rc2 (2017-07-04)

Changes:

Improve performance of storing user IPs (PR #2307, #2308)
Slightly improve performance of verifying access tokens (PR #2320)
Slightly improve performance of event persistence (PR #2321)
Increase default cache factor size from 0.1 to 0.5 (PR #2330)

Bug fixes:

Fix bug with storing registration sessions that caused frequent CPU churn (PR #2319)

Changes in synapse v0.22.0-rc1 (2017-06-26)

Features:

Add a user directory API (PR #2252, and many more)
Add shutdown room API to remove room from local server (PR #2291)
Add API to quarantine media (PR #2292)
Add new config option to not send event contents to push servers (PR #2301) Thanks to @cjdelisle!

Changes:

Various performance fixes (PR #2177, #2233, #2230, #2238, #2248, #2256, #2274)
Deduplicate sync filters (PR #2219) Thanks to @krombel!
Correct a typo in UPGRADE.rst (PR #2231) Thanks to @aaronraimist!
Add count of one time keys to sync stream (PR #2237)
Only store event_auth for state events (PR #2247)
Store URL cache preview downloads separately (PR #2299)

Bug fixes:

Fix users not getting notifications when AS listened to that user_id (PR #2216) Thanks to @slipeer!
Fix users without push set up not getting notifications after joining rooms (PR #2236)
Fix preview url API to trim long descriptions (PR #2243)
Fix bug where we used cached but unpersisted state group as prev group, resulting in broken state of restart (PR #2263)
Fix removing of pushers when using workers (PR #2267)
Fix CORS headers to allow Authorization header (PR #2285) Thanks to @krombel!

Changes in synapse v0.21.1 (2017-06-15)

Bug fixes:

Fix bug in anonymous usage statistic reporting (PR #2281)

Changes in synapse v0.21.0 (2017-05-18)

No changes since v0.21.0-rc3

Changes in synapse v0.21.0-rc3 (2017-05-17)

Features:

Add per user rate-limiting overrides (PR #2208)
Add config option to limit maximum number of events requested by /sync and /messages (PR #2221) Thanks to @psaavedra!

Changes:

Various small performance fixes (PR #2201, #2202, #2224, #2226, #2227, #2228, #2229)
Update username availability checker API (PR #2209, #2213)
When purging, don\'t de-delta state groups we\'re about to delete (PR #2214)
Documentation to check synapse version (PR #2215) Thanks to @hamber-dick!
Add an index to event_search to speed up purge history API (PR #2218)

Bug fixes:

Fix API to allow clients to upload one-time-keys with new sigs (PR #2206)

Changes in synapse v0.21.0-rc2 (2017-05-08)

Changes:

Always mark remotes as up if we receive a signed request from them (PR #2190)

Bug fixes:

Fix bug where users got pushed for rooms they had muted (PR #2200)

Changes in synapse v0.21.0-rc1 (2017-05-08)

Features:

Add username availability checker API (PR #2183)
Add read marker API (PR #2120)

Changes:

Enable guest access for the 3pl/3pid APIs (PR #1986)
Add setting to support TURN for guests (PR #2011)
Various performance improvements (PR #2075, #2076, #2080, #2083, #2108, #2158, #2176, #2185)
Make synctl a bit more user friendly (PR #2078, #2127) Thanks @APwhitehat!
Replace HTTP replication with TCP replication (PR #2082, #2097, #2098, #2099, #2103, #2014, #2016, #2115, #2116, #2117)
Support authenticated SMTP (PR #2102) Thanks @DanielDent!
Add a counter metric for successfully-sent transactions (PR #2121)
Propagate errors sensibly from proxied IS requests (PR #2147)
Add more granular event send metrics (PR #2178)

Bug fixes:

Fix nuke-room script to work with current schema (PR #1927) Thanks @zuckschwerdt!
Fix db port script to not assume postgres tables are in the public schema (PR #2024) Thanks @jerrykan!
Fix getting latest device IP for user with no devices (PR #2118)
Fix rejection of invites to unreachable servers (PR #2145)
Fix code for reporting old verify keys in synapse (PR #2156)
Fix invite state to always include all events (PR #2163)
Fix bug where synapse would always fetch state for any missing event (PR #2170)
Fix a leak with timed out HTTP connections (PR #2180)
Fix bug where we didn\'t time out HTTP requests to ASes (PR #2192)

Docs:

Clarify doc for SQLite to PostgreSQL port (PR #1961) Thanks @benhylau!
Fix typo in synctl help (PR #2107) Thanks @HarHarLinks!
web_client_location documentation fix (PR #2131) Thanks @matthewjwolff!
Update README.rst with FreeBSD changes (PR #2132) Thanks @feld!
Clarify setting up metrics (PR #2149) Thanks @encks!

Changes in synapse v0.20.0 (2017-04-11)

Bug fixes:

Fix joining rooms over federation where not all servers in the room saw the new server had joined (PR #2094)

Changes in synapse v0.20.0-rc1 (2017-03-30)

Features:

Add delete_devices API (PR #1993)
Add phone number registration/login support (PR #1994, #2055)

Changes:

Use JSONSchema for validation of filters. Thanks @pik! (PR #1783)
Reread log config on SIGHUP (PR #1982)
Speed up public room list (PR #1989)
Add helpful texts to logger config options (PR #1990)
Minor /sync performance improvements. (PR #2002, #2013, #2022)
Add some debug to help diagnose weird federation issue (PR #2035)
Correctly limit retries for all federation requests (PR #2050, #2061)
Don\'t lock table when persisting new one time keys (PR #2053)
Reduce some CPU work on DB threads (PR #2054)
Cache hosts in room (PR #2060)
Batch sending of device list pokes (PR #2063)
Speed up persist event path in certain edge cases (PR #2070)

Bug fixes:

Fix bug where current_state_events renamed to current_state_ids (PR #1849)
Fix routing loop when fetching remote media (PR #1992)
Fix current_state_events table to not lie (PR #1996)
Fix CAS login to handle PartialDownloadError (PR #1997)
Fix assertion to stop transaction queue getting wedged (PR #2010)
Fix presence to fallback to last_active_ts if it beats the last sync time. Thanks @Half-Shot! (PR #2014)
Fix bug when federation received a PDU while a room join is in progress (PR #2016)
Fix resetting state on rejected events (PR #2025)
Fix installation issues in readme. Thanks @ricco386 (PR #2037)
Fix caching of remote servers\' signature keys (PR #2042)
Fix some leaking log context (PR #2048, #2049, #2057, #2058)
Fix rejection of invites not reaching sync (PR #2056)

Changes in synapse v0.19.3 (2017-03-20)

No changes since v0.19.3-rc2

Changes in synapse v0.19.3-rc2 (2017-03-13)

Bug fixes:

Fix bug in handling of incoming device list updates over federation.

Changes in synapse v0.19.3-rc1 (2017-03-08)

Features:

Add some administration functionalities. Thanks to morteza-araby! (PR #1784)

Changes:

Reduce database table sizes (PR #1873, #1916, #1923, #1963)
Update contrib/ to not use syutil. Thanks to andrewshadura! (PR #1907)
Don\'t fetch current state when sending an event in common case (PR #1955)

Bug fixes:

Fix synapse_port_db failure. Thanks to Pneumaticat! (PR #1904)
Fix caching to not cache error responses (PR #1913)
Fix APIs to make kick & ban reasons work (PR #1917)
Fix bugs in the /keys/changes api (PR #1921)
Fix bug where users couldn\'t forget rooms they were banned from (PR #1922)
Fix issue with long language values in pushers API (PR #1925)
Fix a race in transaction queue (PR #1930)
Fix dynamic thumbnailing to preserve aspect ratio. Thanks to jkolo! (PR #1945)
Fix device list update to not constantly resync (PR #1964)
Fix potential for huge memory usage when getting device that have changed (PR #1969)

Changes in synapse v0.19.2 (2017-02-20)

Fix bug with event visibility check in /context/ API. Thanks to Tokodomo for pointing it out! (PR #1929)

Changes in synapse v0.19.1 (2017-02-09)

Fix bug where state was incorrectly reset in a room when synapse received an event over federation that did not pass auth checks (PR #1892)

Changes in synapse v0.19.0 (2017-02-04)

No changes since RC 4.

Changes in synapse v0.19.0-rc4 (2017-02-02)

Bump cache sizes for common membership queries (PR #1879)

Changes in synapse v0.19.0-rc3 (2017-02-02)

Fix email push in pusher worker (PR #1875)
Make presence.get_new_events a bit faster (PR #1876)
Make /keys/changes a bit more performant (PR #1877)

Changes in synapse v0.19.0-rc2 (2017-02-02)

Include newly joined users in /keys/changes API (PR #1872)

Changes in synapse v0.19.0-rc1 (2017-02-02)

Features:

Add support for specifying multiple bind addresses (PR #1709, #1712, #1795, #1835). Thanks to @kyrias!
Add /account/3pid/delete endpoint (PR #1714)
Add config option to configure the Riot URL used in notification emails (PR #1811). Thanks to @aperezdc!
Add username and password config options for turn server (PR #1832). Thanks to @xsteadfastx!
Implement device lists updates over federation (PR #1857, #1861, #1864)
Implement /keys/changes (PR #1869, #1872)

Changes:

Improve IPv6 support (PR #1696). Thanks to @kyrias and @glyph!
Log which files we saved attachments to in the media_repository (PR #1791)
Linearize updates to membership via PUT /state/ to better handle multiple joins (PR #1787)
Limit number of entries to prefill from cache on startup (PR #1792)
Remove full_twisted_stacktraces option (PR #1802)
Measure size of some caches by sum of the size of cached values (PR #1815)
Measure metrics of string_cache (PR #1821)
Reduce logging verbosity (PR #1822, #1823, #1824)
Don\'t clobber a displayname or avatar_url if provided by an m.room.member event (PR #1852)
Better handle 401/404 response for federation /send/ (PR #1866, #1871)

Fixes:

Fix ability to change password to a non-ascii one (PR #1711)
Fix push getting stuck due to looking at the wrong view of state (PR #1820)
Fix email address comparison to be case insensitive (PR #1827)
Fix occasional inconsistencies of room membership (PR #1836, #1840)

Performance:

Don\'t block messages sending on bumping presence (PR #1789)
Change device_inbox stream index to include user (PR #1793)
Optimise state resolution (PR #1818)
Use DB cache of joined users for presence (PR #1862)
Add an index to make membership queries faster (PR #1867)

Changes in synapse v0.18.7 (2017-01-09)

No changes from v0.18.7-rc2

Changes in synapse v0.18.7-rc2 (2017-01-07)

Bug fixes:

Fix error in rc1\'s discarding invalid inbound traffic logic that was incorrectly discarding missing events

Changes in synapse v0.18.7-rc1 (2017-01-06)

Bug fixes:

Fix error in #PR 1764 to actually fix the nightmare #1753 bug.
Improve deadlock logging further
Discard inbound federation traffic from invalid domains, to immunise against #1753

Changes in synapse v0.18.6 (2017-01-06)

Bug fixes:

Fix bug when checking if a guest user is allowed to join a room (PR #1772) Thanks to Patrik Oldsberg for diagnosing and the fix!

Changes in synapse v0.18.6-rc3 (2017-01-05)

Bug fixes:

Fix bug where we failed to send ban events to the banned server (PR #1758)
Fix bug where we sent event that didn\'t originate on this server to other servers (PR #1764)
Fix bug where processing an event from a remote server took a long time because we were making long HTTP requests (PR #1765, PR #1744)

Changes:

Improve logging for debugging deadlocks (PR #1766, PR #1767)

Changes in synapse v0.18.6-rc2 (2016-12-30)

Bug fixes:

Fix memory leak in twisted by initialising logging correctly (PR #1731)
Fix bug where fetching missing events took an unacceptable amount of time in large rooms (PR #1734)

Changes in synapse v0.18.6-rc1 (2016-12-29)

Bug fixes:

Make sure that outbound connections are closed (PR #1725)

Changes in synapse v0.18.5 (2016-12-16)

Bug fixes:

Fix federation /backfill returning events it shouldn\'t (PR #1700)
Fix crash in url preview (PR #1701)

Changes in synapse v0.18.5-rc3 (2016-12-13)

Features:

Add support for E2E for guests (PR #1653)
Add new API appservice specific public room list (PR #1676)
Add new room membership APIs (PR #1680)

Changes:

Enable guest access for private rooms by default (PR #653)
Limit the number of events that can be created on a given room concurrently (PR #1620)
Log the args that we have on UI auth completion (PR #1649)
Stop generating refresh_tokens (PR #1654)
Stop putting a time caveat on access tokens (PR #1656)
Remove unspecced GET endpoints for e2e keys (PR #1694)

Bug fixes:

Fix handling of 500 and 429\'s over federation (PR #1650)
Fix Content-Type header parsing (PR #1660)
Fix error when previewing sites that include unicode, thanks to kyrias (PR #1664)
Fix some cases where we drop read receipts (PR #1678)
Fix bug where calls to /sync didn\'t correctly timeout (PR #1683)
Fix bug where E2E key query would fail if a single remote host failed (PR #1686)

Changes in synapse v0.18.5-rc2 (2016-11-24)

Bug fixes:

Don\'t send old events over federation, fixes bug in -rc1.

Changes in synapse v0.18.5-rc1 (2016-11-24)

Features:

Implement \"event_fields\" in filters (PR #1638)

Changes:

Use external ldap auth pacakge (PR #1628)
Split out federation transaction sending to a worker (PR #1635)
Fail with a coherent error message if /sync?filter= is invalid (PR #1636)
More efficient notif count queries (PR #1644)

Changes in synapse v0.18.4 (2016-11-22)

Bug fixes:

Add workaround for buggy clients that the fail to register (PR #1632)

Changes in synapse v0.18.4-rc1 (2016-11-14)

Changes:

Various database efficiency improvements (PR #1188, #1192)
Update default config to blacklist more internal IPs, thanks to Euan Kemp (PR #1198)
Allow specifying duration in minutes in config, thanks to Daniel Dent (PR #1625)

Bug fixes:

Fix media repo to set CORs headers on responses (PR #1190)
Fix registration to not error on non-ascii passwords (PR #1191)
Fix create event code to limit the number of prev_events (PR #1615)
Fix bug in transaction ID deduplication (PR #1624)

Changes in synapse v0.18.3 (2016-11-08)

SECURITY UPDATE

Explicitly require authentication when using LDAP3. This is the default on versions of ldap3 above 1.0, but some distributions will package an older version.

If you are using LDAP3 login and have a version of ldap3 older than 1.0 it is CRITICAL to updgrade.

Changes in synapse v0.18.2 (2016-11-01)

No changes since v0.18.2-rc5

Changes in synapse v0.18.2-rc5 (2016-10-28)

Bug fixes:

Fix prometheus process metrics in worker processes (PR #1184)

Changes in synapse v0.18.2-rc4 (2016-10-27)

Bug fixes:

Fix user_threepids schema delta, which in some instances prevented startup after upgrade (PR #1183)

Changes in synapse v0.18.2-rc3 (2016-10-27)

Changes:

Allow clients to supply access tokens as headers (PR #1098)
Clarify error codes for GET /filter/, thanks to Alexander Maznev (PR #1164)
Make password reset email field case insensitive (PR #1170)
Reduce redundant database work in email pusher (PR #1174)
Allow configurable rate limiting per AS (PR #1175)
Check whether to ratelimit sooner to avoid work (PR #1176)
Standardise prometheus metrics (PR #1177)

Bug fixes:

Fix incredibly slow back pagination query (PR #1178)
Fix infinite typing bug (PR #1179)

Changes in synapse v0.18.2-rc2 (2016-10-25)

(This release did not include the changes advertised and was identical to RC1)

Changes in synapse v0.18.2-rc1 (2016-10-17)

Changes:

Remove redundant event_auth index (PR #1113)
Reduce DB hits for replication (PR #1141)
Implement pluggable password auth (PR #1155)
Remove rate limiting from app service senders and fix get_or_create_user requester, thanks to Patrik Oldsberg (PR #1157)
window.postmessage for Interactive Auth fallback (PR #1159)
Use sys.executable instead of hardcoded python, thanks to Pedro Larroy (PR #1162)
Add config option for adding additional TLS fingerprints (PR #1167)
User-interactive auth on delete device (PR #1168)

Bug fixes:

Fix not being allowed to set your own state_key, thanks to Patrik Oldsberg (PR #1150)
Fix interactive auth to return 401 from for incorrect password (PR #1160, #1166)
Fix email push notifs being dropped (PR #1169)

Changes in synapse v0.18.1 (2016-10-05)

No changes since v0.18.1-rc1

Changes in synapse v0.18.1-rc1 (2016-09-30)

Features:

Add total_room_count_estimate to /publicRooms (PR #1133)

Changes:

Time out typing over federation (PR #1140)
Restructure LDAP authentication (PR #1153)

Bug fixes:

Fix 3pid invites when server is already in the room (PR #1136)
Fix upgrading with SQLite taking lots of CPU for a few days after upgrade (PR #1144)
Fix upgrading from very old database versions (PR #1145)
Fix port script to work with recently added tables (PR #1146)

Changes in synapse v0.18.0 (2016-09-19)

The release includes major changes to the state storage database schemas, which significantly reduce database size. Synapse will attempt to upgrade the current data in the background. Servers with large SQLite database may experience degradation of performance while this upgrade is in progress, therefore you may want to consider migrating to using Postgres before upgrading very large SQLite databases

Changes:

Make public room search case insensitive (PR #1127)

Bug fixes:

Fix and clean up publicRooms pagination (PR #1129)

Changes in synapse v0.18.0-rc1 (2016-09-16)

Features:

Add only=highlight on /notifications (PR #1081)
Add server param to /publicRooms (PR #1082)
Allow clients to ask for the whole of a single state event (PR #1094)
Add is_direct param to /createRoom (PR #1108)
Add pagination support to publicRooms (PR #1121)
Add very basic filter API to /publicRooms (PR #1126)
Add basic direct to device messaging support for E2E (PR #1074, #1084, #1104, #1111)

Changes:

Move to storing state_groups_state as deltas, greatly reducing DB size (PR #1065)
Reduce amount of state pulled out of the DB during common requests (PR #1069)
Allow PDF to be rendered from media repo (PR #1071)
Reindex state_groups_state after pruning (PR #1085)
Clobber EDUs in send queue (PR #1095)
Conform better to the CAS protocol specification (PR #1100)
Limit how often we ask for keys from dead servers (PR #1114)

Bug fixes:

Fix /notifications API when used with from param (PR #1080)
Fix backfill when cannot find an event. (PR #1107)

Changes in synapse v0.17.3 (2016-09-09)

This release fixes a major bug that stopped servers from handling rooms with over 1000 members.

Changes in synapse v0.17.2 (2016-09-08)

This release contains security bug fixes. Please upgrade.

No changes since v0.17.2-rc1

Changes in synapse v0.17.2-rc1 (2016-09-05)

Features:

Start adding store-and-forward direct-to-device messaging (PR #1046, #1050, #1062, #1066)

Changes:

Avoid pulling the full state of a room out so often (PR #1047, #1049, #1063, #1068)
Don\'t notify for online to online presence transitions. (PR #1054)
Occasionally persist unpersisted presence updates (PR #1055)
Allow application services to have an optional \'url\' (PR #1056)
Clean up old sent transactions from DB (PR #1059)

Bug fixes:

Fix None check in backfill (PR #1043)
Fix membership changes to be idempotent (PR #1067)
Fix bug in get_pdu where it would sometimes return events with incorrect signature

Changes in synapse v0.17.1 (2016-08-24)

Changes:

Delete old received_transactions rows (PR #1038)
Pass through user-supplied content in /join/\$room_id (PR #1039)

Bug fixes:

Fix bug with backfill (PR #1040)

Changes in synapse v0.17.1-rc1 (2016-08-22)

Features:

Add notification API (PR #1028)

Changes:

Don\'t print stack traces when failing to get remote keys (PR #996)
Various federation /event/ perf improvements (PR #998)
Only process one local membership event per room at a time (PR #1005)
Move default display name push rule (PR #1011, #1023)
Fix up preview URL API. Add tests. (PR #1015)
Set Content-Security-Policy on media repo (PR #1021)
Make notify_interested_services faster (PR #1022)
Add usage stats to prometheus monitoring (PR #1037)

Bug fixes:

Fix token login (PR #993)
Fix CAS login (PR #994, #995)
Fix /sync to not clobber status_msg (PR #997)
Fix redacted state events to include prev_content (PR #1003)
Fix some bugs in the auth/ldap handler (PR #1007)
Fix backfill request to limit URI length, so that remotes don\'t reject the requests due to path length limits (PR #1012)
Fix AS push code to not send duplicate events (PR #1025)

Changes in synapse v0.17.0 (2016-08-08)

This release contains significant security bug fixes regarding authenticating events received over federation. PLEASE UPGRADE.

This release changes the LDAP configuration format in a backwards incompatible way, see PR #843 for details.

Changes:

Add federation /version API (PR #990)
Make psutil dependency optional (PR #992)

Bug fixes:

Fix URL preview API to exclude HTML comments in description (PR #988)
Fix error handling of remote joins (PR #991)

Changes in synapse v0.17.0-rc4 (2016-08-05)

Changes:

Change the way we summarize URLs when previewing (PR #973)
Add new /state_ids/ federation API (PR #979)
Speed up processing of /state/ response (PR #986)

Bug fixes:

Fix event persistence when event has already been partially persisted (PR #975, #983, #985)
Fix port script to also copy across backfilled events (PR #982)

Changes in synapse v0.17.0-rc3 (2016-08-02)

Changes:

Forbid non-ASes from registering users whose names begin with \'_\' (PR #958)
Add some basic admin API docs (PR #963)

Bug fixes:

Send the correct host header when fetching keys (PR #941)
Fix joining a room that has missing auth events (PR #964)
Fix various push bugs (PR #966, #970)
Fix adding emails on registration (PR #968)

Changes in synapse v0.17.0-rc2 (2016-08-02)

(This release did not include the changes advertised and was identical to RC1)

Changes in synapse v0.17.0-rc1 (2016-07-28)

This release changes the LDAP configuration format in a backwards incompatible way, see PR #843 for details.

Features:

Add purge_media_cache admin API (PR #902)
Add deactivate account admin API (PR #903)
Add optional pepper to password hashing (PR #907, #910 by KentShikama)
Add an admin option to shared secret registration (breaks backwards compat) (PR #909)
Add purge local room history API (PR #911, #923, #924)
Add requestToken endpoints (PR #915)
Add an /account/deactivate endpoint (PR #921)
Add filter param to /messages. Add \'contains_url\' to filter. (PR #922)
Add device_id support to /login (PR #929)
Add device_id support to /v2/register flow. (PR #937, #942)
Add GET /devices endpoint (PR #939, #944)
Add GET /device/{deviceId} (PR #943)
Add update and delete APIs for devices (PR #949)

Changes:

Rewrite LDAP Authentication against ldap3 (PR #843 by mweinelt)
Linearize some federation endpoints based on (origin, room_id) (PR #879)
Remove the legacy v0 content upload API. (PR #888)
Use similar naming we use in email notifs for push (PR #894)
Optionally include password hash in createUser endpoint (PR #905 by KentShikama)
Use a query that postgresql optimises better for get_events_around (PR #906)
Fall back to \'username\' if \'user\' is not given for appservice registration. (PR #927 by Half-Shot)
Add metrics for psutil derived memory usage (PR #936)
Record device_id in client_ips (PR #938)
Send the correct host header when fetching keys (PR #941)
Log the hostname the reCAPTCHA was completed on (PR #946)
Make the device id on e2e key upload optional (PR #956)
Add r0.2.0 to the \"supported versions\" list (PR #960)
Don\'t include name of room for invites in push (PR #961)

Bug fixes:

Fix substitution failure in mail template (PR #887)
Put most recent 20 messages in email notif (PR #892)
Ensure that the guest user is in the database when upgrading accounts (PR #914)
Fix various edge cases in auth handling (PR #919)
Fix 500 ISE when sending alias event without a state_key (PR #925)
Fix bug where we stored rejections in the state_group, persist all rejections (PR #948)
Fix lack of check of if the user is banned when handling 3pid invites (PR #952)
Fix a couple of bugs in the transaction and keyring code (PR #954, #955)

Changes in synapse v0.16.1-r1 (2016-07-08)

THIS IS A CRITICAL SECURITY UPDATE.

This fixes a bug which allowed users\' accounts to be accessed by unauthorised users.

Changes in synapse v0.16.1 (2016-06-20)

Bug fixes:

Fix assorted bugs in /preview_url (PR #872)
Fix TypeError when setting unicode passwords (PR #873)

Performance improvements:

Turn use_frozen_events off by default (PR #877)
Disable responding with canonical json for federation (PR #878)

Changes in synapse v0.16.1-rc1 (2016-06-15)

Features: None

Changes:

Log requester for /publicRoom endpoints when possible (PR #856)
502 on /thumbnail when can\'t connect to remote server (PR #862)
Linearize fetching of gaps on incoming events (PR #871)

Bugs fixes:

Fix bug where rooms where marked as published by default (PR #857)
Fix bug where joining room with an event with invalid sender (PR #868)
Fix bug where backfilled events were sent down sync streams (PR #869)
Fix bug where outgoing connections could wedge indefinitely, causing push notifications to be unreliable (PR #870)

Performance improvements:

Improve /publicRooms performance(PR #859)

Changes in synapse v0.16.0 (2016-06-09)

NB: As of v0.14 all AS config files must have an ID field.

Bug fixes:

Don\'t make rooms published by default (PR #857)

Changes in synapse v0.16.0-rc2 (2016-06-08)

Features:

Add configuration option for tuning GC via gc.set_threshold (PR #849)

Changes:

Record metrics about GC (PR #771, #847, #852)
Add metric counter for number of persisted events (PR #841)

Bug fixes:

Fix \'From\' header in email notifications (PR #843)
Fix presence where timeouts were not being fired for the first 8h after restarts (PR #842)
Fix bug where synapse sent malformed transactions to AS\'s when retrying transactions (Commits 310197b, 8437906)

Performance improvements:

Remove event fetching from DB threads (PR #835)
Change the way we cache events (PR #836)
Add events to cache when we persist them (PR #840)

Changes in synapse v0.16.0-rc1 (2016-06-03)

Version 0.15 was not released. See v0.15.0-rc1 below for additional changes.

Features:

Add email notifications for missed messages (PR #759, #786, #799, #810, #815, #821)
Add a url_preview_ip_range_whitelist config param (PR #760)
Add /report endpoint (PR #762)
Add basic ignore user API (PR #763)
Add an openidish mechanism for proving that you own a given user_id (PR #765)
Allow clients to specify a server_name to avoid \'No known servers\' (PR #794)
Add secondary_directory_servers option to fetch room list from other servers (PR #808, #813)

Changes:

Report per request metrics for all of the things using request_handler (PR #756)
Correctly handle NULL password hashes from the database (PR #775)
Allow receipts for events we haven\'t seen in the db (PR #784)
Make synctl read a cache factor from config file (PR #785)
Increment badge count per missed convo, not per msg (PR #793)
Special case m.room.third_party_invite event auth to match invites (PR #814)

Bug fixes:

Fix typo in event_auth servlet path (PR #757)
Fix password reset (PR #758)

Performance improvements:

Reduce database inserts when sending transactions (PR #767)
Queue events by room for persistence (PR #768)
Add cache to get_user_by_id (PR #772)
Add and use get_domain_from_id (PR #773)
Use tree cache for get_linearized_receipts_for_room (PR #779)
Remove unused indices (PR #782)
Add caches to bulk_get_push_rules* (PR #804)
Cache get_event_reference_hashes (PR #806)
Add get_users_with_read_receipts_in_room cache (PR #809)
Use state to calculate get_users_in_room (PR #811)
Load push rules in storage layer so that they get cached (PR #825)
Make get_joined_hosts_for_room use get_users_in_room (PR #828)
Poke notifier on next reactor tick (PR #829)
Change CacheMetrics to be quicker (PR #830)

Changes in synapse v0.15.0-rc1 (2016-04-26)

Features:

Add login support for Javascript Web Tokens, thanks to Niklas Riekenbrauck (PR #671,#687)
Add URL previewing support (PR #688)
Add login support for LDAP, thanks to Christoph Witzany (PR #701)
Add GET endpoint for pushers (PR #716)

Changes:

Never notify for member events (PR #667)
Deduplicate identical /sync requests (PR #668)
Require user to have left room to forget room (PR #673)
Use DNS cache if within TTL (PR #677)
Let users see their own leave events (PR #699)
Deduplicate membership changes (PR #700)
Increase performance of pusher code (PR #705)
Respond with error status 504 if failed to talk to remote server (PR #731)
Increase search performance on postgres (PR #745)

Bug fixes:

Fix bug where disabling all notifications still resulted in push (PR #678)
Fix bug where users couldn\'t reject remote invites if remote refused (PR #691)
Fix bug where synapse attempted to backfill from itself (PR #693)
Fix bug where profile information was not correctly added when joining remote rooms (PR #703)
Fix bug where register API required incorrect key name for AS registration (PR #727)

Changes in synapse v0.14.0 (2016-03-30)

No changes from v0.14.0-rc2

Changes in synapse v0.14.0-rc2 (2016-03-23)

Features:

Add published room list API (PR #657)

Changes:

Change various caches to consume less memory (PR #656, #658, #660, #662, #663, #665)
Allow rooms to be published without requiring an alias (PR #664)
Intern common strings in caches to reduce memory footprint (#666)

Bug fixes:

Fix reject invites over federation (PR #646)
Fix bug where registration was not idempotent (PR #649)
Update aliases event after deleting aliases (PR #652)
Fix unread notification count, which was sometimes wrong (PR #661)

Changes in synapse v0.14.0-rc1 (2016-03-14)

Features:

Add event_id to response to state event PUT (PR #581)
Allow guest users access to messages in rooms they have joined (PR #587)
Add config for what state is included in a room invite (PR #598)
Send the inviter\'s member event in room invite state (PR #607)
Add error codes for malformed/bad JSON in /login (PR #608)
Add support for changing the actions for default rules (PR #609)
Add environment variable SYNAPSE_CACHE_FACTOR, default it to 0.1 (PR #612)
Add ability for alias creators to delete aliases (PR #614)
Add profile information to invites (PR #624)

Changes:

Enforce user_id exclusivity for AS registrations (PR #572)
Make adding push rules idempotent (PR #587)
Improve presence performance (PR #582, #586)
Change presence semantics for last_active_ago (PR #582, #586)
Don\'t allow m.room.create to be changed (PR #596)
Add 800x600 to default list of valid thumbnail sizes (PR #616)
Always include kicks and bans in full /sync (PR #625)
Send history visibility on boundary changes (PR #626)
Register endpoint now returns a refresh_token (PR #637)

Bug fixes:

Fix bug where we returned incorrect state in /sync (PR #573)
Always return a JSON object from push rule API (PR #606)
Fix bug where registering without a user id sometimes failed (PR #610)
Report size of ExpiringCache in cache size metrics (PR #611)
Fix rejection of invites to empty rooms (PR #615)
Fix usage of bcrypt to not use checkpw (PR #619)
Pin pysaml2 dependency (PR #634)
Fix bug in /sync where timeline order was incorrect for backfilled events (PR #635)

Changes in synapse v0.13.3 (2016-02-11)

Fix bug where /sync would occasionally return events in the wrong room.

Changes in synapse v0.13.2 (2016-02-11)

Fix bug where /events would fail to skip some events if there had been more events than the limit specified since the last request (PR #570)

Changes in synapse v0.13.1 (2016-02-10)

Bump matrix-angular-sdk (matrix web console) dependency to 0.6.8 to pull in the fix for SYWEB-361 so that the default client can display HTML messages again(!)

Changes in synapse v0.13.0 (2016-02-10)

This version includes an upgrade of the schema, specifically adding an index to the events table. This may cause synapse to pause for several minutes the first time it is started after the upgrade.

Changes:

Improve general performance (PR #540, #543. #544, #54, #549, #567)
Change guest user ids to be incrementing integers (PR #550)
Improve performance of public room list API (PR #552)
Change profile API to omit keys rather than return null (PR #557)
Add /media/r0 endpoint prefix, which is equivalent to /media/v1/ (PR #595)

Bug fixes:

Fix bug with upgrading guest accounts where it would fail if you opened the registration email on a different device (PR #547)
Fix bug where unread count could be wrong (PR #568)

Changes in synapse v0.12.1-rc1 (2016-01-29)

Features:

Add unread notification counts in /sync (PR #456)
Add support for inviting 3pids in /createRoom (PR #460)
Add ability for guest accounts to upgrade (PR #462)
Add /versions API (PR #468)
Add event to /context API (PR #492)
Add specific error code for invalid user names in /register (PR #499)
Add support for push badge counts (PR #507)
Add support for non-guest users to peek in rooms using /events (PR #510)

Changes:

Change /sync so that guest users only get rooms they\'ve joined (PR #469)
Change to require unbanning before other membership changes (PR #501)
Change default push rules to notify for all messages (PR #486)
Change default push rules to not notify on membership changes (PR #514)
Change default push rules in one to one rooms to only notify for events that are messages (PR #529)
Change /sync to reject requests with a from query param (PR #512)
Change server manhole to use SSH rather than telnet (PR #473)
Change server to require AS users to be registered before use (PR #487)
Change server not to start when ASes are invalidly configured (PR #494)
Change server to require ID and as_token to be unique for AS\'s (PR #496)
Change maximum pagination limit to 1000 (PR #497)

Bug fixes:

Fix bug where /sync didn\'t return when something under the leave key changed (PR #461)
Fix bug where we returned smaller rather than larger than requested thumbnails when method=crop (PR #464)
Fix thumbnails API to only return cropped thumbnails when asking for a cropped thumbnail (PR #475)
Fix bug where we occasionally still logged access tokens (PR #477)
Fix bug where /events would always return immediately for guest users (PR #480)
Fix bug where /sync unexpectedly returned old left rooms (PR #481)
Fix enabling and disabling push rules (PR #498)
Fix bug where /register returned 500 when given unicode username (PR #513)

Changes in synapse v0.12.0 (2016-01-04)

Expose /login under r0 (PR #459)

Changes in synapse v0.12.0-rc3 (2015-12-23)

Allow guest accounts access to /sync (PR #455)
Allow filters to include/exclude rooms at the room level rather than just from the components of the sync for each room. (PR #454)
Include urls for room avatars in the response to /publicRooms (PR #453)
Don\'t set a identicon as the avatar for a user when they register (PR #450)
Add a display_name to third-party invites (PR #449)
Send more information to the identity server for third-party invites so that it can send richer messages to the invitee (PR #446)
Cache the responses to /initialSync for 5 minutes. If a client retries a request to /initialSync before the a response was computed to the first request then the same response is used for both requests (PR #457)
Fix a bug where synapse would always request the signing keys of remote servers even when the key was cached locally (PR #452)
Fix 500 when pagination search results (PR #447)
Fix a bug where synapse was leaking raw email address in third-party invites (PR #448)

Changes in synapse v0.12.0-rc2 (2015-12-14)

Add caches for whether rooms have been forgotten by a user (PR #434)
Remove instructions to use --process-dependency-link since all of the dependencies of synapse are on PyPI (PR #436)
Parallelise the processing of /sync requests (PR #437)
Fix race updating presence in /events (PR #444)
Fix bug back-populating search results (PR #441)
Fix bug calculating state in /sync requests (PR #442)

Changes in synapse v0.12.0-rc1 (2015-12-10)

Host the client APIs released as r0 by https://matrix.org/docs/spec/r0.0.0/client_server.html on paths prefixed by /_matrix/client/r0. (PR #430, PR #415, PR #400)
Updates the client APIs to match r0 of the matrix specification.
- All APIs return events in the new event format, old APIs also include the fields needed to parse the event using the old format for compatibility. (PR #402)
- Search results are now given as a JSON array rather than a JSON object (PR #405)
- Miscellaneous changes to search (PR #403, PR #406, PR #412)
- Filter JSON objects may now be passed as query parameters to /sync (PR #431)
- Fix implementation of /admin/whois (PR #418)
- Only include the rooms that user has left in /sync if the client requests them in the filter (PR #423)
- Don\'t push for m.room.message by default (PR #411)
- Add API for setting per account user data (PR #392)
- Allow users to forget rooms (PR #385)
Performance improvements and monitoring:
- Add per-request counters for CPU time spent on the main python thread. (PR #421, PR #420)
- Add per-request counters for time spent in the database (PR #429)
- Make state updates in the C+S API idempotent (PR #416)
- Only fire user_joined_room if the user has actually joined. (PR #410)
- Reuse a single http client, rather than creating new ones (PR #413)
Fixed a bug upgrading from older versions of synapse on postgresql (PR #417)

Changes in synapse v0.11.1 (2015-11-20)

Add extra options to search API (PR #394)
Fix bug where we did not correctly cap federation retry timers. This meant it could take several hours for servers to start talking to ressurected servers, even when they were receiving traffic from them (PR #393)
Don\'t advertise login token flow unless CAS is enabled. This caused issues where some clients would always use the fallback API if they did not recognize all login flows (PR #391)
Change /v2 sync API to rename private_user_data to account_data (PR #386)
Change /v2 sync API to remove the event_map and rename keys in rooms object (PR #389)

Changes in synapse v0.11.0-r2 (2015-11-19)

Fix bug in database port script (PR #387)

Changes in synapse v0.11.0-r1 (2015-11-18)

Retry and fail federation requests more aggressively for requests that block client side requests (PR #384)

Changes in synapse v0.11.0 (2015-11-17)

Change CAS login API (PR #349)

Changes in synapse v0.11.0-rc2 (2015-11-13)

Various changes to /sync API response format (PR #373)
Fix regression when setting display name in newly joined room over federation (PR #368)
Fix problem where /search was slow when using SQLite (PR #366)

Changes in synapse v0.11.0-rc1 (2015-11-11)

Add Search API (PR #307, #324, #327, #336, #350, #359)
Add \'archived\' state to v2 /sync API (PR #316)
Add ability to reject invites (PR #317)
Add config option to disable password login (PR #322)
Add the login fallback API (PR #330)
Add room context API (PR #334)
Add room tagging support (PR #335)
Update v2 /sync API to match spec (PR #305, #316, #321, #332, #337, #341)
Change retry schedule for application services (PR #320)
Change retry schedule for remote servers (PR #340)
Fix bug where we hosted static content in the incorrect place (PR #329)
Fix bug where we didn\'t increment retry interval for remote servers (PR #343)

Changes in synapse v0.10.1-rc1 (2015-10-15)

Add support for CAS, thanks to Steven Hammerton (PR #295, #296)
Add support for using macaroons for access_token (PR #256, #229)
Add support for m.room.canonical_alias (PR #287)
Add support for viewing the history of rooms that they have left. (PR #276, #294)
Add support for refresh tokens (PR #240)
Add flag on creation which disables federation of the room (PR #279)
Add some room state to invites. (PR #275)
Atomically persist events when joining a room over federation (PR #283)
Change default history visibility for private rooms (PR #271)
Allow users to redact their own sent events (PR #262)
Use tox for tests (PR #247)
Split up syutil into separate libraries (PR #243)

Changes in synapse v0.10.0-r2 (2015-09-16)

Fix bug where we always fetched remote server signing keys instead of using ones in our cache.
Fix adding threepids to an existing account.
Fix bug with invinting over federation where remote server was already in the room. (PR #281, SYN-392)

Changes in synapse v0.10.0-r1 (2015-09-08)

Fix bug with python packaging

Changes in synapse v0.10.0 (2015-09-03)

No change from release candidate.

Changes in synapse v0.10.0-rc6 (2015-09-02)

Remove some of the old database upgrade scripts.
Fix database port script to work with newly created sqlite databases.

Changes in synapse v0.10.0-rc5 (2015-08-27)

Fix bug that broke downloading files with ascii filenames across federation.

Changes in synapse v0.10.0-rc4 (2015-08-27)

Allow UTF-8 filenames for upload. (PR #259)

Changes in synapse v0.10.0-rc3 (2015-08-25)

Add --keys-directory config option to specify where files such as certs and signing keys should be stored in, when using --generate-config or --generate-keys. (PR #250)
Allow --config-path to specify a directory, causing synapse to use all *.yaml files in the directory as config files. (PR #249)
Add web_client_location config option to specify static files to be hosted by synapse under /_matrix/client. (PR #245)
Add helper utility to synapse to read and parse the config files and extract the value of a given key. For example:
```
$ python -m synapse.config read server_name -c homeserver.yaml
localhost
```
(PR #246)

Changes in synapse v0.10.0-rc2 (2015-08-24)

Fix bug where we incorrectly populated the event_forward_extremities table, resulting in problems joining large remote rooms (e.g. #matrix:matrix.org)
Reduce the number of times we wake up pushers by not listening for presence or typing events, reducing the CPU cost of each pusher.

Changes in synapse v0.10.0-rc1 (2015-08-21)

Also see v0.9.4-rc1 changelog, which has been amalgamated into this release.

General:

Upgrade to Twisted 15 (PR #173)
Add support for serving and fetching encryption keys over federation. (PR #208)
Add support for logging in with email address (PR #234)
Add support for new m.room.canonical_alias event. (PR #233)
Change synapse to treat user IDs case insensitively during registration and login. (If two users already exist with case insensitive matching user ids, synapse will continue to require them to specify their user ids exactly.)
Error if a user tries to register with an email already in use. (PR #211)
Add extra and improve existing caches (PR #212, #219, #226, #228)
Batch various storage request (PR #226, #228)
Fix bug where we didn\'t correctly log the entity that triggered the request if the request came in via an application service (PR #230)
Fix bug where we needlessly regenerated the full list of rooms an AS is interested in. (PR #232)
Add support for AS\'s to use v2_alpha registration API (PR #210)

Configuration:

Add --generate-keys that will generate any missing cert and key files in the configuration files. This is equivalent to running --generate-config on an existing configuration file. (PR #220)
--generate-config now no longer requires a --server-name parameter when used on existing configuration files. (PR #220)
Add --print-pidfile flag that controls the printing of the pid to stdout of the demonised process. (PR #213)

Media Repository:

Fix bug where we picked a lower resolution image than requested. (PR #205)
Add support for specifying if a the media repository should dynamically thumbnail images or not. (PR #206)

Metrics:

Add statistics from the reactor to the metrics API. (PR #224, #225)

Demo Homeservers:

Fix starting the demo homeservers without rate-limiting enabled. (PR #182)
Fix enabling registration on demo homeservers (PR #223)

Changes in synapse v0.9.4-rc1 (2015-07-21)

General:

Add basic implementation of receipts. (SPEC-99)
Add support for configuration presets in room creation API. (PR #203)
Add auth event that limits the visibility of history for new users. (SPEC-134)
Add SAML2 login/registration support. (PR #201. Thanks Muthu Subramanian!)
Add client side key management APIs for end to end encryption. (PR #198)
Change power level semantics so that you cannot kick, ban or change power levels of users that have equal or greater power level than you. (SYN-192)
Improve performance by bulk inserting events where possible. (PR #193)
Improve performance by bulk verifying signatures where possible. (PR #194)

Configuration:

Add support for including TLS certificate chains.

Media Repository:

Add Content-Disposition headers to content repository responses. (SYN-150)

Changes in synapse v0.9.3 (2015-07-01)

No changes from v0.9.3 Release Candidate 1.

Changes in synapse v0.9.3-rc1 (2015-06-23)

General:

Fix a memory leak in the notifier. (SYN-412)
Improve performance of room initial sync. (SYN-418)
General improvements to logging.
Remove access_token query params from INFO level logging.

Configuration:

Add support for specifying and configuring multiple listeners. (SYN-389)

Application services:

Fix bug where synapse failed to send user queries to application services.

Changes in synapse v0.9.2-r2 (2015-06-15)

Fix packaging so that schema delta python files get included in the package.

Changes in synapse v0.9.2 (2015-06-12)

General:

Use ultrajson for json (de)serialisation when a canonical encoding is not required. Ultrajson is significantly faster than simplejson in certain circumstances.
Use connection pools for outgoing HTTP connections.
Process thumbnails on separate threads.

Configuration:

Add option, gzip_responses, to disable HTTP response compression.

Federation:

Improve resilience of backfill by ensuring we fetch any missing auth events.
Improve performance of backfill and joining remote rooms by removing unnecessary computations. This included handling events we\'d previously handled as well as attempting to compute the current state for outliers.

Changes in synapse v0.9.1 (2015-05-26)

General:

Add support for backfilling when a client paginates. This allows servers to request history for a room from remote servers when a client tries to paginate history the server does not have - SYN-36
Fix bug where you couldn\'t disable non-default pushrules - SYN-378
Fix register_new_user script - SYN-359
Improve performance of fetching events from the database, this improves both initialSync and sending of events.
Improve performance of event streams, allowing synapse to handle more simultaneous connected clients.

Federation:

Fix bug with existing backfill implementation where it returned the wrong selection of events in some circumstances.
Improve performance of joining remote rooms.

Configuration:

Add support for changing the bind host of the metrics listener via the metrics_bind_host option.

Changes in synapse v0.9.0-r5 (2015-05-21)

Add more database caches to reduce amount of work done for each pusher. This radically reduces CPU usage when multiple pushers are set up in the same room.

Changes in synapse v0.9.0 (2015-05-07)

General:

Add support for using a PostgreSQL database instead of SQLite. See docs/postgres.rst for details.
Add password change and reset APIs. See Registration in the spec.
Fix memory leak due to not releasing stale notifiers - SYN-339.
Fix race in caches that occasionally caused some presence updates to be dropped - SYN-369.
Check server name has not changed on restart.
Add a sample systemd unit file and a logger configuration in contrib/systemd. Contributed Ivan Shapovalov.

Federation:

Add key distribution mechanisms for fetching public keys of unavailable remote home servers. See Retrieving Server Keys in the spec.

Configuration:

Add support for multiple config files.
Add support for dictionaries in config files.
Remove support for specifying config options on the command line, except for:
- --daemonize - Daemonize the home server.
- --manhole - Turn on the twisted telnet manhole service on the given port.
- --database-path - The path to a sqlite database to use.
- --verbose - The verbosity level.
- --log-file - File to log to.
- --log-config - Python logging config file.
- --enable-registration - Enable registration for new users.

Application services:

Reliably retry sending of events from Synapse to application services, as per Application Services spec.
Application services can no longer register via the /register API, instead their configuration should be saved to a file and listed in the synapse app_service_config_files config option. The AS configuration file has the same format as the old /register request. See docs/application_services.rst for more information.

Changes in synapse v0.8.1 (2015-03-18)

Disable registration by default. New users can be added using the command register_new_matrix_user or by enabling registration in the config.
Add metrics to synapse. To enable metrics use config options enable_metrics and metrics_port.
Fix bug where banning only kicked the user.

Changes in synapse v0.8.0 (2015-03-06)

General:

Add support for registration fallback. This is a page hosted on the server which allows a user to register for an account, regardless of what client they are using (e.g. mobile devices).
Added new default push rules and made them configurable by clients:
- Suppress all notice messages.
- Notify when invited to a new room.
- Notify for messages that don\'t match any rule.
- Notify on incoming call.

Federation:

Added per host server side rate-limiting of incoming federation requests.
Added a /get_missing_events/ API to federation to reduce number of /events/ requests.

Configuration:

Added configuration option to disable registration: disable_registration.
Added configuration option to change soft limit of number of open file descriptors: soft_file_limit.
Make tls_private_key_path optional when running with no_tls.

Application services:

Application services can now poll on the CS API /events for their events, by providing their application service access_token.
Added exclusive namespace support to application services API.

Changes in synapse v0.7.1 (2015-02-19)

Initial alpha implementation of parts of the Application Services API. Including:
- AS Registration / Unregistration
- User Query API
- Room Alias Query API
- Push transport for receiving events.
- User/Alias namespace admin control
Add cache when fetching events from remote servers to stop repeatedly fetching events with bad signatures.
Respect the per remote server retry scheme when fetching both events and server keys to reduce the number of times we send requests to dead servers.
Inform remote servers when the local server fails to handle a received event.
Turn off python bytecode generation due to problems experienced when upgrading from previous versions.

Changes in synapse v0.7.0 (2015-02-12)

Add initial implementation of the query auth federation API, allowing servers to agree on whether an event should be allowed or rejected.
Persist events we have rejected from federation, fixing the bug where servers would keep requesting the same events.
Various federation performance improvements, including:
- Add in memory caches on queries such as:
  - Computing the state of a room at a point in time, used for authorization on federation requests.
  - Fetching events from the database.
  - User\'s room membership, used for authorizing presence updates.
- Upgraded JSON library to improve parsing and serialisation speeds.
Add default avatars to new user accounts using pydenticon library.
Correctly time out federation requests.
Retry federation requests against different servers.
Add support for push and push rules.
Add alpha versions of proposed new CSv2 APIs, including /sync API.

Changes in synapse 0.6.1 (2015-01-07)

Major optimizations to improve performance of initial sync and event sending in large rooms (by up to 10x)
Media repository now includes a Content-Length header on media downloads.
Improve quality of thumbnails by changing resizing algorithm.

Changes in synapse 0.6.0 (2014-12-16)

Add new API for media upload and download that supports thumbnailing.
Replicate media uploads over multiple homeservers so media is always served to clients from their local homeserver. This obsoletes the --content-addr parameter and confusion over accessing content directly from remote homeservers.
Implement exponential backoff when retrying federation requests when sending to remote homeservers which are offline.
Implement typing notifications.
Fix bugs where we sent events with invalid signatures due to bugs where we incorrectly persisted events.
Improve performance of database queries involving retrieving events.

Changes in synapse 0.5.4a (2014-12-13)

Fix bug while generating the error message when a file path specified in the config doesn\'t exist.

Changes in synapse 0.5.4 (2014-12-03)

Fix presence bug where some rooms did not display presence updates for remote users.
Do not log SQL timing log lines when started with \"-v\"
Fix potential memory leak.

Changes in synapse 0.5.3c (2014-12-02)

Change the default value for the content_addr option to use the HTTP listener, as by default the HTTPS listener will be using a self-signed certificate.

Changes in synapse 0.5.3 (2014-11-27)

Fix bug that caused joining a remote room to fail if a single event was not signed correctly.
Fix bug which caused servers to continuously try and fetch events from other servers.

Changes in synapse 0.5.2 (2014-11-26)

Fix major bug that caused rooms to disappear from peoples initial sync.

Changes in synapse 0.5.1 (2014-11-26)

See UPGRADES.rst for specific instructions on how to upgrade.

Fix bug where we served up an Event that did not match its signatures.
Fix regression where we no longer correctly handled the case where a homeserver receives an event for a room it doesn\'t recognise (but is in.)

Changes in synapse 0.5.0 (2014-11-19)

This release includes changes to the federation protocol and client-server API that is not backwards compatible.

This release also changes the internal database schemas and so requires servers to drop their current history. See UPGRADES.rst for details.

Homeserver:

Add authentication and authorization to the federation protocol. Events are now signed by their originating homeservers.
Implement the new authorization model for rooms.
Split out web client into a seperate repository: matrix-angular-sdk.
Change the structure of PDUs.
Fix bug where user could not join rooms via an alias containing 4-byte UTF-8 characters.
Merge concept of PDUs and Events internally.
Improve logging by adding request ids to log lines.
Implement a very basic room initial sync API.
Implement the new invite/join federation APIs.

Webclient:

The webclient has been moved to a seperate repository.

Changes in synapse 0.4.2 (2014-10-31)

Homeserver:

Fix bugs where we did not notify users of correct presence updates.
Fix bug where we did not handle sub second event stream timeouts.

Webclient:

Add ability to click on messages to see JSON.
Add ability to redact messages.
Add ability to view and edit all room state JSON.
Handle incoming redactions.
Improve feedback on errors.
Fix bugs in mobile CSS.
Fix bugs with desktop notifications.

Changes in synapse 0.4.1 (2014-10-17)

Webclient:

Fix bug with display of timestamps.

Changes in synpase 0.4.0 (2014-10-17)

This release includes changes to the federation protocol and client-server API that is not backwards compatible.

The Matrix specification has been moved to a separate git repository: http://github.com/matrix-org/matrix-doc

You will also need an updated syutil and config. See UPGRADES.rst.

Homeserver:

Sign federation transactions to assert strong identity over federation.
Rename timestamp keys in PDUs and events from \'ts\' and \'hsob_ts\' to \'origin_server_ts\'.

Changes in synapse 0.3.4 (2014-09-25)

This version adds support for using a TURN server. See docs/turn-howto.rst on how to set one up.

Homeserver:

Add support for redaction of messages.
Fix bug where inviting a user on a remote home server could take up to 20-30s.
Implement a get current room state API.
Add support specifying and retrieving turn server configuration.

Webclient:

Add button to send messages to users from the home page.
Add support for using TURN for VoIP calls.
Show display name change messages.
Fix bug where the client didn\'t get the state of a newly joined room until after it has been refreshed.
Fix bugs with tab complete.
Fix bug where holding down the down arrow caused chrome to chew 100% CPU.
Fix bug where desktop notifications occasionally used \"Undefined\" as the display name.
Fix more places where we sometimes saw room IDs incorrectly.
Fix bug which caused lag when entering text in the text box.

Changes in synapse 0.3.3 (2014-09-22)

Homeserver:

Fix bug where you continued to get events for rooms you had left.

Webclient:

Add support for video calls with basic UI.
Fix bug where one to one chats were named after your display name rather than the other person\'s.
Fix bug which caused lag when typing in the textarea.
Refuse to run on browsers we know won\'t work.
Trigger pagination when joining new rooms.
Fix bug where we sometimes didn\'t display invitations in recents.
Automatically join room when accepting a VoIP call.
Disable outgoing and reject incoming calls on browsers we don\'t support VoIP in.
Don\'t display desktop notifications for messages in the room you are non-idle and speaking in.

Changes in synapse 0.3.2 (2014-09-18)

Webclient:

Fix bug where an empty \"bing words\" list in old accounts didn\'t send notifications when it should have done.

Changes in synapse 0.3.1 (2014-09-18)

This is a release to hotfix v0.3.0 to fix two regressions.

Webclient:

Fix a regression where we sometimes displayed duplicate events.
Fix a regression where we didn\'t immediately remove rooms you were banned in from the recents list.

Changes in synapse 0.3.0 (2014-09-18)

See UPGRADE for information about changes to the client server API, including breaking backwards compatibility with VoIP calls and registration API.

Homeserver:

When a user changes their displayname or avatar the server will now update all their join states to reflect this.
The server now adds \"age\" key to events to indicate how old they are. This is clock independent, so at no point does any server or webclient have to assume their clock is in sync with everyone else.
Fix bug where we didn\'t correctly pull in missing PDUs.
Fix bug where prev_content key wasn\'t always returned.
Add support for password resets.

Webclient:

Improve page content loading.
Join/parts now trigger desktop notifications.
Always show room aliases in the UI if one is present.
No longer show user-count in the recents side panel.
Add up & down arrow support to the text box for message sending to step through your sent history.
Don\'t display notifications for our own messages.
Emotes are now formatted correctly in desktop notifications.
The recents list now differentiates between public & private rooms.
Fix bug where when switching between rooms the pagination flickered before the view jumped to the bottom of the screen.
Add bing word support.

Registration API:

The registration API has been overhauled to function like the login API. In practice, this means registration requests must now include the following: \'type\':\'m.login.password\'. See UPGRADE for more information on this.
The \'user_id\' key has been renamed to \'user\' to better match the login API.
There is an additional login type: \'m.login.email.identity\'.
The command client and web client have been updated to reflect these changes.

Changes in synapse 0.2.3 (2014-09-12)

Homeserver:

Fix bug where we stopped sending events to remote home servers if a user from that home server left, even if there were some still in the room.
Fix bugs in the state conflict resolution where it was incorrectly rejecting events.

Webclient:

Display room names and topics.
Allow setting/editing of room names and topics.
Display information about rooms on the main page.
Handle ban and kick events in real time.
VoIP UI and reliability improvements.
Add glare support for VoIP.
Improvements to initial startup speed.
Don\'t display duplicate join events.
Local echo of messages.
Differentiate sending and sent of local echo.
Various minor bug fixes.

Changes in synapse 0.2.2 (2014-09-06)

Homeserver:

When the server returns state events it now also includes the previous content.
Add support for inviting people when creating a new room.
Make the homeserver inform the room via m.room.aliases when a new alias is added for a room.
Validate m.room.power_level events.

Webclient:

Add support for captchas on registration.
Handle m.room.aliases events.
Asynchronously send messages and show a local echo.
Inform the UI when a message failed to send.
Only autoscroll on receiving a new message if the user was already at the bottom of the screen.
Add support for ban/kick reasons.

Changes in synapse 0.2.1 (2014-09-03)

Homeserver:

Added support for signing up with a third party id.
Add synctl scripts.
Added rate limiting.
Add option to change the external address the content repo uses.
Presence bug fixes.

Webclient:

Added support for signing up with a third party id.
Added support for banning and kicking users.
Added support for displaying and setting ops.
Added support for room names.
Fix bugs with room membership event display.

Changes in synapse 0.2.0 (2014-09-02)

This update changes many configuration options, updates the database schema and mandates SSL for server-server connections.

Homeserver:

Require SSL for server-server connections.
Add SSL listener for client-server connections.
Add ability to use config files.
Add support for kicking/banning and power levels.
Allow setting of room names and topics on creation.
Change presence to include last seen time of the user.
Change url path prefix to /_matrix/...
Bug fixes to presence.

Webclient:

Reskin the CSS for registration and login.
Various improvements to rooms CSS.
Support changes in client-server API.
Bug fixes to VOIP UI.
Various bug fixes to handling of changes to room member list.

Changes in synapse 0.1.2 (2014-08-29)

Webclient:

Add basic call state UI for VoIP calls.

Changes in synapse 0.1.1 (2014-08-29)

Homeserver:

Fix bug that caused the event stream to not notify some clients about changes.

Changes in synapse 0.1.0 (2014-08-29)

Presence has been reenabled in this release.

Homeserver:

Update client to server API, including:
- Use a more consistent url scheme.
- Provide more useful information in the initial sync api.
Change the presence handling to be much more efficient.
Change the presence server to server API to not require explicit polling of all users who share a room with a user.
Fix races in the event streaming logic.

Webclient:

Update to use new client to server API.
Add basic VOIP support.
Add idle timers that change your status to away.
Add recent rooms column when viewing a room.
Various network efficiency improvements.
Add basic mobile browser support.
Add a settings page.

Changes in synapse 0.0.1 (2014-08-22)

Presence has been disabled in this release due to a bug that caused the homeserver to spam other remote homeservers.

Homeserver:

Completely change the database schema to support generic event types.
Improve presence reliability.
Improve reliability of joining remote rooms.
Fix bug where room join events were duplicated.
Improve initial sync API to return more information to the client.
Stop generating fake messages for room membership events.

Webclient:

Add tab completion of names.
Add ability to upload and send images.
Add profile pages.
Improve CSS layout of room.
Disambiguate identical display names.
Don\'t get remote users display names and avatars individually.
Use the new initial sync API to reduce number of round trips to the homeserver.
Change url scheme to use room aliases instead of room ids where known.
Increase longpoll timeout.

Changes in synapse 0.0.0 (2014-08-13)

Initial alpha release

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Synapse 1.32.0 (2021-04-20)

Bugfixes

Synapse 1.32.0rc1 (2021-04-13)

Features

Bugfixes

Updates to the Docker image

Improved Documentation

Deprecations and Removals

Internal Changes

Synapse 1.31.0 (2021-04-06)

Improved Documentation

Internal Changes

Synapse 1.31.0rc1 (2021-03-30)

Features

Bugfixes

Updates to the Docker image

Improved Documentation

Internal Changes

Synapse 1.30.1 (2021-03-26)

Updates to the Docker image

Internal Changes

Synapse 1.30.0 (2021-03-22)

Synapse 1.30.0rc1 (2021-03-16)

Features

Bugfixes

Updates to the Docker image

Improved Documentation

Deprecations and Removals

Internal Changes

Synapse 1.29.0 (2021-03-08)

Synapse 1.29.0rc1 (2021-03-04)

Features

Bugfixes

Improved Documentation

Internal Changes

Synapse 1.28.0 (2021-02-25)

Internal Changes

Synapse 1.28.0rc1 (2021-02-19)

Removal warning

Features

Bugfixes

Updates to the Docker image

Improved Documentation

Deprecations and Removals

Internal Changes

Synapse 1.27.0 (2021-02-16)

Bugfixes

Synapse 1.27.0rc2 (2021-02-11)

Features

Bugfixes

Improved Documentation

Synapse 1.27.0rc1 (2021-02-02)

Features

Bugfixes

Improved Documentation

Deprecations and Removals

Internal Changes

Synapse 1.26.0 (2021-01-27)

Synapse 1.26.0rc2 (2021-01-25)

Bugfixes

Internal Changes

Synapse 1.26.0rc1 (2021-01-20)

Features

Bugfixes

Improved Documentation

Deprecations and Removals

Internal Changes

Synapse 1.25.0 (2021-01-13)

Ending Support for Python 3.5 and Postgres 9.5

Transition Period

Removal warning

Bugfixes

Synapse 1.25.0rc1 (2021-01-06)

Features

Bugfixes

Improved Documentation

Deprecations and Removals

Internal Changes

Synapse 1.24.0 (2020-12-09)

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