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- # -*- coding: utf-8 -*-
- # Copyright 2016 OpenMarket Ltd
- # Copyright 2018 New Vector Ltd
- # Copyright 2019 The Matrix.org Foundation C.I.C.
- #
- # Licensed under the Apache License, Version 2.0 (the "License");
- # you may not use this file except in compliance with the License.
- # You may obtain a copy of the License at
- #
- # http://www.apache.org/licenses/LICENSE-2.0
- #
- # Unless required by applicable law or agreed to in writing, software
- # distributed under the License is distributed on an "AS IS" BASIS,
- # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- # See the License for the specific language governing permissions and
- # limitations under the License.
- import abc
- import logging
- from http import HTTPStatus
- from typing import Dict, Iterable, List, Optional, Tuple
- from synapse import types
- from synapse.api.constants import EventTypes, Membership
- from synapse.api.errors import AuthError, Codes, SynapseError
- from synapse.events import EventBase
- from synapse.events.snapshot import EventContext
- from synapse.replication.http.membership import (
- ReplicationLocallyRejectInviteRestServlet,
- )
- from synapse.types import Collection, Requester, RoomAlias, RoomID, UserID
- from synapse.util.async_helpers import Linearizer
- from synapse.util.distributor import user_joined_room, user_left_room
- from ._base import BaseHandler
- logger = logging.getLogger(__name__)
- class RoomMemberHandler(object):
- # TODO(paul): This handler currently contains a messy conflation of
- # low-level API that works on UserID objects and so on, and REST-level
- # API that takes ID strings and returns pagination chunks. These concerns
- # ought to be separated out a lot better.
- __metaclass__ = abc.ABCMeta
- def __init__(self, hs):
- self.hs = hs
- self.store = hs.get_datastore()
- self.auth = hs.get_auth()
- self.state_handler = hs.get_state_handler()
- self.config = hs.config
- self.federation_handler = hs.get_handlers().federation_handler
- self.directory_handler = hs.get_handlers().directory_handler
- self.identity_handler = hs.get_handlers().identity_handler
- self.registration_handler = hs.get_registration_handler()
- self.profile_handler = hs.get_profile_handler()
- self.event_creation_handler = hs.get_event_creation_handler()
- self.member_linearizer = Linearizer(name="member")
- self.clock = hs.get_clock()
- self.spam_checker = hs.get_spam_checker()
- self.third_party_event_rules = hs.get_third_party_event_rules()
- self._server_notices_mxid = self.config.server_notices_mxid
- self._enable_lookup = hs.config.enable_3pid_lookup
- self.allow_per_room_profiles = self.config.allow_per_room_profiles
- self._event_stream_writer_instance = hs.config.worker.writers.events
- self._is_on_event_persistence_instance = (
- self._event_stream_writer_instance == hs.get_instance_name()
- )
- if self._is_on_event_persistence_instance:
- self.persist_event_storage = hs.get_storage().persistence
- else:
- self._locally_reject_client = ReplicationLocallyRejectInviteRestServlet.make_client(
- hs
- )
- # This is only used to get at ratelimit function, and
- # maybe_kick_guest_users. It's fine there are multiple of these as
- # it doesn't store state.
- self.base_handler = BaseHandler(hs)
- @abc.abstractmethod
- async def _remote_join(
- self,
- requester: Requester,
- remote_room_hosts: List[str],
- room_id: str,
- user: UserID,
- content: dict,
- ) -> Tuple[str, int]:
- """Try and join a room that this server is not in
- Args:
- requester
- remote_room_hosts: List of servers that can be used to join via.
- room_id: Room that we are trying to join
- user: User who is trying to join
- content: A dict that should be used as the content of the join event.
- """
- raise NotImplementedError()
- @abc.abstractmethod
- async def _remote_reject_invite(
- self,
- requester: Requester,
- remote_room_hosts: List[str],
- room_id: str,
- target: UserID,
- content: dict,
- ) -> Tuple[Optional[str], int]:
- """Attempt to reject an invite for a room this server is not in. If we
- fail to do so we locally mark the invite as rejected.
- Args:
- requester
- remote_room_hosts: List of servers to use to try and reject invite
- room_id
- target: The user rejecting the invite
- content: The content for the rejection event
- Returns:
- A dictionary to be returned to the client, may
- include event_id etc, or nothing if we locally rejected
- """
- raise NotImplementedError()
- async def locally_reject_invite(self, user_id: str, room_id: str) -> int:
- """Mark the invite has having been rejected even though we failed to
- create a leave event for it.
- """
- if self._is_on_event_persistence_instance:
- return await self.persist_event_storage.locally_reject_invite(
- user_id, room_id
- )
- else:
- result = await self._locally_reject_client(
- instance_name=self._event_stream_writer_instance,
- user_id=user_id,
- room_id=room_id,
- )
- return result["stream_id"]
- @abc.abstractmethod
- async def _user_joined_room(self, target: UserID, room_id: str) -> None:
- """Notifies distributor on master process that the user has joined the
- room.
- Args:
- target
- room_id
- """
- raise NotImplementedError()
- @abc.abstractmethod
- async def _user_left_room(self, target: UserID, room_id: str) -> None:
- """Notifies distributor on master process that the user has left the
- room.
- Args:
- target
- room_id
- """
- raise NotImplementedError()
- async def _local_membership_update(
- self,
- requester: Requester,
- target: UserID,
- room_id: str,
- membership: str,
- prev_event_ids: Collection[str],
- txn_id: Optional[str] = None,
- ratelimit: bool = True,
- content: Optional[dict] = None,
- require_consent: bool = True,
- ) -> Tuple[str, int]:
- user_id = target.to_string()
- if content is None:
- content = {}
- content["membership"] = membership
- if requester.is_guest:
- content["kind"] = "guest"
- event, context = await self.event_creation_handler.create_event(
- requester,
- {
- "type": EventTypes.Member,
- "content": content,
- "room_id": room_id,
- "sender": requester.user.to_string(),
- "state_key": user_id,
- # For backwards compatibility:
- "membership": membership,
- },
- token_id=requester.access_token_id,
- txn_id=txn_id,
- prev_event_ids=prev_event_ids,
- require_consent=require_consent,
- )
- # Check if this event matches the previous membership event for the user.
- duplicate = await self.event_creation_handler.deduplicate_state_event(
- event, context
- )
- if duplicate is not None:
- # Discard the new event since this membership change is a no-op.
- _, stream_id = await self.store.get_event_ordering(duplicate.event_id)
- return duplicate.event_id, stream_id
- stream_id = await self.event_creation_handler.handle_new_client_event(
- requester, event, context, extra_users=[target], ratelimit=ratelimit
- )
- prev_state_ids = await context.get_prev_state_ids()
- prev_member_event_id = prev_state_ids.get((EventTypes.Member, user_id), None)
- if event.membership == Membership.JOIN:
- # Only fire user_joined_room if the user has actually joined the
- # room. Don't bother if the user is just changing their profile
- # info.
- newly_joined = True
- if prev_member_event_id:
- prev_member_event = await self.store.get_event(prev_member_event_id)
- newly_joined = prev_member_event.membership != Membership.JOIN
- if newly_joined:
- await self._user_joined_room(target, room_id)
- elif event.membership == Membership.LEAVE:
- if prev_member_event_id:
- prev_member_event = await self.store.get_event(prev_member_event_id)
- if prev_member_event.membership == Membership.JOIN:
- await self._user_left_room(target, room_id)
- return event.event_id, stream_id
- async def copy_room_tags_and_direct_to_room(
- self, old_room_id, new_room_id, user_id
- ) -> None:
- """Copies the tags and direct room state from one room to another.
- Args:
- old_room_id: The room ID of the old room.
- new_room_id: The room ID of the new room.
- user_id: The user's ID.
- """
- # Retrieve user account data for predecessor room
- user_account_data, _ = await self.store.get_account_data_for_user(user_id)
- # Copy direct message state if applicable
- direct_rooms = user_account_data.get("m.direct", {})
- # Check which key this room is under
- if isinstance(direct_rooms, dict):
- for key, room_id_list in direct_rooms.items():
- if old_room_id in room_id_list and new_room_id not in room_id_list:
- # Add new room_id to this key
- direct_rooms[key].append(new_room_id)
- # Save back to user's m.direct account data
- await self.store.add_account_data_for_user(
- user_id, "m.direct", direct_rooms
- )
- break
- # Copy room tags if applicable
- room_tags = await self.store.get_tags_for_room(user_id, old_room_id)
- # Copy each room tag to the new room
- for tag, tag_content in room_tags.items():
- await self.store.add_tag_to_room(user_id, new_room_id, tag, tag_content)
- async def update_membership(
- self,
- requester: Requester,
- target: UserID,
- room_id: str,
- action: str,
- txn_id: Optional[str] = None,
- remote_room_hosts: Optional[List[str]] = None,
- third_party_signed: Optional[dict] = None,
- ratelimit: bool = True,
- content: Optional[dict] = None,
- require_consent: bool = True,
- ) -> Tuple[Optional[str], int]:
- key = (room_id,)
- with (await self.member_linearizer.queue(key)):
- result = await self._update_membership(
- requester,
- target,
- room_id,
- action,
- txn_id=txn_id,
- remote_room_hosts=remote_room_hosts,
- third_party_signed=third_party_signed,
- ratelimit=ratelimit,
- content=content,
- require_consent=require_consent,
- )
- return result
- async def _update_membership(
- self,
- requester: Requester,
- target: UserID,
- room_id: str,
- action: str,
- txn_id: Optional[str] = None,
- remote_room_hosts: Optional[List[str]] = None,
- third_party_signed: Optional[dict] = None,
- ratelimit: bool = True,
- content: Optional[dict] = None,
- require_consent: bool = True,
- ) -> Tuple[Optional[str], int]:
- content_specified = bool(content)
- if content is None:
- content = {}
- else:
- # We do a copy here as we potentially change some keys
- # later on.
- content = dict(content)
- if not self.allow_per_room_profiles:
- # Strip profile data, knowing that new profile data will be added to the
- # event's content in event_creation_handler.create_event() using the target's
- # global profile.
- content.pop("displayname", None)
- content.pop("avatar_url", None)
- effective_membership_state = action
- if action in ["kick", "unban"]:
- effective_membership_state = "leave"
- # if this is a join with a 3pid signature, we may need to turn a 3pid
- # invite into a normal invite before we can handle the join.
- if third_party_signed is not None:
- await self.federation_handler.exchange_third_party_invite(
- third_party_signed["sender"],
- target.to_string(),
- room_id,
- third_party_signed,
- )
- if not remote_room_hosts:
- remote_room_hosts = []
- if effective_membership_state not in ("leave", "ban"):
- is_blocked = await self.store.is_room_blocked(room_id)
- if is_blocked:
- raise SynapseError(403, "This room has been blocked on this server")
- if effective_membership_state == Membership.INVITE:
- # block any attempts to invite the server notices mxid
- if target.to_string() == self._server_notices_mxid:
- raise SynapseError(HTTPStatus.FORBIDDEN, "Cannot invite this user")
- block_invite = False
- if (
- self._server_notices_mxid is not None
- and requester.user.to_string() == self._server_notices_mxid
- ):
- # allow the server notices mxid to send invites
- is_requester_admin = True
- else:
- is_requester_admin = await self.auth.is_server_admin(requester.user)
- if not is_requester_admin:
- if self.config.block_non_admin_invites:
- logger.info(
- "Blocking invite: user is not admin and non-admin "
- "invites disabled"
- )
- block_invite = True
- if not self.spam_checker.user_may_invite(
- requester.user.to_string(), target.to_string(), room_id
- ):
- logger.info("Blocking invite due to spam checker")
- block_invite = True
- if block_invite:
- raise SynapseError(403, "Invites have been disabled on this server")
- latest_event_ids = await self.store.get_prev_events_for_room(room_id)
- current_state_ids = await self.state_handler.get_current_state_ids(
- room_id, latest_event_ids=latest_event_ids
- )
- # TODO: Refactor into dictionary of explicitly allowed transitions
- # between old and new state, with specific error messages for some
- # transitions and generic otherwise
- old_state_id = current_state_ids.get((EventTypes.Member, target.to_string()))
- if old_state_id:
- old_state = await self.store.get_event(old_state_id, allow_none=True)
- old_membership = old_state.content.get("membership") if old_state else None
- if action == "unban" and old_membership != "ban":
- raise SynapseError(
- 403,
- "Cannot unban user who was not banned"
- " (membership=%s)" % old_membership,
- errcode=Codes.BAD_STATE,
- )
- if old_membership == "ban" and action != "unban":
- raise SynapseError(
- 403,
- "Cannot %s user who was banned" % (action,),
- errcode=Codes.BAD_STATE,
- )
- if old_state:
- same_content = content == old_state.content
- same_membership = old_membership == effective_membership_state
- same_sender = requester.user.to_string() == old_state.sender
- if same_sender and same_membership and same_content:
- _, stream_id = await self.store.get_event_ordering(
- old_state.event_id
- )
- return (
- old_state.event_id,
- stream_id,
- )
- if old_membership in ["ban", "leave"] and action == "kick":
- raise AuthError(403, "The target user is not in the room")
- # we don't allow people to reject invites to the server notice
- # room, but they can leave it once they are joined.
- if (
- old_membership == Membership.INVITE
- and effective_membership_state == Membership.LEAVE
- ):
- is_blocked = await self._is_server_notice_room(room_id)
- if is_blocked:
- raise SynapseError(
- HTTPStatus.FORBIDDEN,
- "You cannot reject this invite",
- errcode=Codes.CANNOT_LEAVE_SERVER_NOTICE_ROOM,
- )
- else:
- if action == "kick":
- raise AuthError(403, "The target user is not in the room")
- is_host_in_room = await self._is_host_in_room(current_state_ids)
- if effective_membership_state == Membership.JOIN:
- if requester.is_guest:
- guest_can_join = await self._can_guest_join(current_state_ids)
- if not guest_can_join:
- # This should be an auth check, but guests are a local concept,
- # so don't really fit into the general auth process.
- raise AuthError(403, "Guest access not allowed")
- if not is_host_in_room:
- inviter = await self._get_inviter(target.to_string(), room_id)
- if inviter and not self.hs.is_mine(inviter):
- remote_room_hosts.append(inviter.domain)
- content["membership"] = Membership.JOIN
- profile = self.profile_handler
- if not content_specified:
- content["displayname"] = await profile.get_displayname(target)
- content["avatar_url"] = await profile.get_avatar_url(target)
- if requester.is_guest:
- content["kind"] = "guest"
- remote_join_response = await self._remote_join(
- requester, remote_room_hosts, room_id, target, content
- )
- return remote_join_response
- elif effective_membership_state == Membership.LEAVE:
- if not is_host_in_room:
- # perhaps we've been invited
- inviter = await self._get_inviter(target.to_string(), room_id)
- if not inviter:
- raise SynapseError(404, "Not a known room")
- if self.hs.is_mine(inviter):
- # the inviter was on our server, but has now left. Carry on
- # with the normal rejection codepath.
- #
- # This is a bit of a hack, because the room might still be
- # active on other servers.
- pass
- else:
- # send the rejection to the inviter's HS.
- remote_room_hosts = remote_room_hosts + [inviter.domain]
- return await self._remote_reject_invite(
- requester, remote_room_hosts, room_id, target, content,
- )
- return await self._local_membership_update(
- requester=requester,
- target=target,
- room_id=room_id,
- membership=effective_membership_state,
- txn_id=txn_id,
- ratelimit=ratelimit,
- prev_event_ids=latest_event_ids,
- content=content,
- require_consent=require_consent,
- )
- async def transfer_room_state_on_room_upgrade(
- self, old_room_id: str, room_id: str
- ) -> None:
- """Upon our server becoming aware of an upgraded room, either by upgrading a room
- ourselves or joining one, we can transfer over information from the previous room.
- Copies user state (tags/push rules) for every local user that was in the old room, as
- well as migrating the room directory state.
- Args:
- old_room_id: The ID of the old room
- room_id: The ID of the new room
- """
- logger.info("Transferring room state from %s to %s", old_room_id, room_id)
- # Find all local users that were in the old room and copy over each user's state
- users = await self.store.get_users_in_room(old_room_id)
- await self.copy_user_state_on_room_upgrade(old_room_id, room_id, users)
- # Add new room to the room directory if the old room was there
- # Remove old room from the room directory
- old_room = await self.store.get_room(old_room_id)
- if old_room and old_room["is_public"]:
- await self.store.set_room_is_public(old_room_id, False)
- await self.store.set_room_is_public(room_id, True)
- # Transfer alias mappings in the room directory
- await self.store.update_aliases_for_room(old_room_id, room_id)
- # Check if any groups we own contain the predecessor room
- local_group_ids = await self.store.get_local_groups_for_room(old_room_id)
- for group_id in local_group_ids:
- # Add new the new room to those groups
- await self.store.add_room_to_group(group_id, room_id, old_room["is_public"])
- # Remove the old room from those groups
- await self.store.remove_room_from_group(group_id, old_room_id)
- async def copy_user_state_on_room_upgrade(
- self, old_room_id: str, new_room_id: str, user_ids: Iterable[str]
- ) -> None:
- """Copy user-specific information when they join a new room when that new room is the
- result of a room upgrade
- Args:
- old_room_id: The ID of upgraded room
- new_room_id: The ID of the new room
- user_ids: User IDs to copy state for
- """
- logger.debug(
- "Copying over room tags and push rules from %s to %s for users %s",
- old_room_id,
- new_room_id,
- user_ids,
- )
- for user_id in user_ids:
- try:
- # It is an upgraded room. Copy over old tags
- await self.copy_room_tags_and_direct_to_room(
- old_room_id, new_room_id, user_id
- )
- # Copy over push rules
- await self.store.copy_push_rules_from_room_to_room_for_user(
- old_room_id, new_room_id, user_id
- )
- except Exception:
- logger.exception(
- "Error copying tags and/or push rules from rooms %s to %s for user %s. "
- "Skipping...",
- old_room_id,
- new_room_id,
- user_id,
- )
- continue
- async def send_membership_event(
- self,
- requester: Requester,
- event: EventBase,
- context: EventContext,
- ratelimit: bool = True,
- ):
- """
- Change the membership status of a user in a room.
- Args:
- requester: The local user who requested the membership
- event. If None, certain checks, like whether this homeserver can
- act as the sender, will be skipped.
- event: The membership event.
- context: The context of the event.
- ratelimit: Whether to rate limit this request.
- Raises:
- SynapseError if there was a problem changing the membership.
- """
- target_user = UserID.from_string(event.state_key)
- room_id = event.room_id
- if requester is not None:
- sender = UserID.from_string(event.sender)
- assert (
- sender == requester.user
- ), "Sender (%s) must be same as requester (%s)" % (sender, requester.user)
- assert self.hs.is_mine(sender), "Sender must be our own: %s" % (sender,)
- else:
- requester = types.create_requester(target_user)
- prev_event = await self.event_creation_handler.deduplicate_state_event(
- event, context
- )
- if prev_event is not None:
- return
- prev_state_ids = await context.get_prev_state_ids()
- if event.membership == Membership.JOIN:
- if requester.is_guest:
- guest_can_join = await self._can_guest_join(prev_state_ids)
- if not guest_can_join:
- # This should be an auth check, but guests are a local concept,
- # so don't really fit into the general auth process.
- raise AuthError(403, "Guest access not allowed")
- if event.membership not in (Membership.LEAVE, Membership.BAN):
- is_blocked = await self.store.is_room_blocked(room_id)
- if is_blocked:
- raise SynapseError(403, "This room has been blocked on this server")
- await self.event_creation_handler.handle_new_client_event(
- requester, event, context, extra_users=[target_user], ratelimit=ratelimit
- )
- prev_member_event_id = prev_state_ids.get(
- (EventTypes.Member, event.state_key), None
- )
- if event.membership == Membership.JOIN:
- # Only fire user_joined_room if the user has actually joined the
- # room. Don't bother if the user is just changing their profile
- # info.
- newly_joined = True
- if prev_member_event_id:
- prev_member_event = await self.store.get_event(prev_member_event_id)
- newly_joined = prev_member_event.membership != Membership.JOIN
- if newly_joined:
- await self._user_joined_room(target_user, room_id)
- elif event.membership == Membership.LEAVE:
- if prev_member_event_id:
- prev_member_event = await self.store.get_event(prev_member_event_id)
- if prev_member_event.membership == Membership.JOIN:
- await self._user_left_room(target_user, room_id)
- async def _can_guest_join(
- self, current_state_ids: Dict[Tuple[str, str], str]
- ) -> bool:
- """
- Returns whether a guest can join a room based on its current state.
- """
- guest_access_id = current_state_ids.get((EventTypes.GuestAccess, ""), None)
- if not guest_access_id:
- return False
- guest_access = await self.store.get_event(guest_access_id)
- return (
- guest_access
- and guest_access.content
- and "guest_access" in guest_access.content
- and guest_access.content["guest_access"] == "can_join"
- )
- async def lookup_room_alias(
- self, room_alias: RoomAlias
- ) -> Tuple[RoomID, List[str]]:
- """
- Get the room ID associated with a room alias.
- Args:
- room_alias: The alias to look up.
- Returns:
- A tuple of:
- The room ID as a RoomID object.
- Hosts likely to be participating in the room ([str]).
- Raises:
- SynapseError if room alias could not be found.
- """
- directory_handler = self.directory_handler
- mapping = await directory_handler.get_association(room_alias)
- if not mapping:
- raise SynapseError(404, "No such room alias")
- room_id = mapping["room_id"]
- servers = mapping["servers"]
- # put the server which owns the alias at the front of the server list.
- if room_alias.domain in servers:
- servers.remove(room_alias.domain)
- servers.insert(0, room_alias.domain)
- return RoomID.from_string(room_id), servers
- async def _get_inviter(self, user_id: str, room_id: str) -> Optional[UserID]:
- invite = await self.store.get_invite_for_local_user_in_room(
- user_id=user_id, room_id=room_id
- )
- if invite:
- return UserID.from_string(invite.sender)
- return None
- async def do_3pid_invite(
- self,
- room_id: str,
- inviter: UserID,
- medium: str,
- address: str,
- id_server: str,
- requester: Requester,
- txn_id: Optional[str],
- id_access_token: Optional[str] = None,
- ) -> int:
- if self.config.block_non_admin_invites:
- is_requester_admin = await self.auth.is_server_admin(requester.user)
- if not is_requester_admin:
- raise SynapseError(
- 403, "Invites have been disabled on this server", Codes.FORBIDDEN
- )
- # We need to rate limit *before* we send out any 3PID invites, so we
- # can't just rely on the standard ratelimiting of events.
- await self.base_handler.ratelimit(requester)
- can_invite = await self.third_party_event_rules.check_threepid_can_be_invited(
- medium, address, room_id
- )
- if not can_invite:
- raise SynapseError(
- 403,
- "This third-party identifier can not be invited in this room",
- Codes.FORBIDDEN,
- )
- if not self._enable_lookup:
- raise SynapseError(
- 403, "Looking up third-party identifiers is denied from this server"
- )
- invitee = await self.identity_handler.lookup_3pid(
- id_server, medium, address, id_access_token
- )
- if invitee:
- _, stream_id = await self.update_membership(
- requester, UserID.from_string(invitee), room_id, "invite", txn_id=txn_id
- )
- else:
- stream_id = await self._make_and_store_3pid_invite(
- requester,
- id_server,
- medium,
- address,
- room_id,
- inviter,
- txn_id=txn_id,
- id_access_token=id_access_token,
- )
- return stream_id
- async def _make_and_store_3pid_invite(
- self,
- requester: Requester,
- id_server: str,
- medium: str,
- address: str,
- room_id: str,
- user: UserID,
- txn_id: Optional[str],
- id_access_token: Optional[str] = None,
- ) -> int:
- room_state = await self.state_handler.get_current_state(room_id)
- inviter_display_name = ""
- inviter_avatar_url = ""
- member_event = room_state.get((EventTypes.Member, user.to_string()))
- if member_event:
- inviter_display_name = member_event.content.get("displayname", "")
- inviter_avatar_url = member_event.content.get("avatar_url", "")
- # if user has no display name, default to their MXID
- if not inviter_display_name:
- inviter_display_name = user.to_string()
- canonical_room_alias = ""
- canonical_alias_event = room_state.get((EventTypes.CanonicalAlias, ""))
- if canonical_alias_event:
- canonical_room_alias = canonical_alias_event.content.get("alias", "")
- room_name = ""
- room_name_event = room_state.get((EventTypes.Name, ""))
- if room_name_event:
- room_name = room_name_event.content.get("name", "")
- room_join_rules = ""
- join_rules_event = room_state.get((EventTypes.JoinRules, ""))
- if join_rules_event:
- room_join_rules = join_rules_event.content.get("join_rule", "")
- room_avatar_url = ""
- room_avatar_event = room_state.get((EventTypes.RoomAvatar, ""))
- if room_avatar_event:
- room_avatar_url = room_avatar_event.content.get("url", "")
- (
- token,
- public_keys,
- fallback_public_key,
- display_name,
- ) = await self.identity_handler.ask_id_server_for_third_party_invite(
- requester=requester,
- id_server=id_server,
- medium=medium,
- address=address,
- room_id=room_id,
- inviter_user_id=user.to_string(),
- room_alias=canonical_room_alias,
- room_avatar_url=room_avatar_url,
- room_join_rules=room_join_rules,
- room_name=room_name,
- inviter_display_name=inviter_display_name,
- inviter_avatar_url=inviter_avatar_url,
- id_access_token=id_access_token,
- )
- (
- event,
- stream_id,
- ) = await self.event_creation_handler.create_and_send_nonmember_event(
- requester,
- {
- "type": EventTypes.ThirdPartyInvite,
- "content": {
- "display_name": display_name,
- "public_keys": public_keys,
- # For backwards compatibility:
- "key_validity_url": fallback_public_key["key_validity_url"],
- "public_key": fallback_public_key["public_key"],
- },
- "room_id": room_id,
- "sender": user.to_string(),
- "state_key": token,
- },
- ratelimit=False,
- txn_id=txn_id,
- )
- return stream_id
- async def _is_host_in_room(
- self, current_state_ids: Dict[Tuple[str, str], str]
- ) -> bool:
- # Have we just created the room, and is this about to be the very
- # first member event?
- create_event_id = current_state_ids.get(("m.room.create", ""))
- if len(current_state_ids) == 1 and create_event_id:
- # We can only get here if we're in the process of creating the room
- return True
- for etype, state_key in current_state_ids:
- if etype != EventTypes.Member or not self.hs.is_mine_id(state_key):
- continue
- event_id = current_state_ids[(etype, state_key)]
- event = await self.store.get_event(event_id, allow_none=True)
- if not event:
- continue
- if event.membership == Membership.JOIN:
- return True
- return False
- async def _is_server_notice_room(self, room_id: str) -> bool:
- if self._server_notices_mxid is None:
- return False
- user_ids = await self.store.get_users_in_room(room_id)
- return self._server_notices_mxid in user_ids
- class RoomMemberMasterHandler(RoomMemberHandler):
- def __init__(self, hs):
- super(RoomMemberMasterHandler, self).__init__(hs)
- self.distributor = hs.get_distributor()
- self.distributor.declare("user_joined_room")
- self.distributor.declare("user_left_room")
- async def _is_remote_room_too_complex(
- self, room_id: str, remote_room_hosts: List[str]
- ) -> Optional[bool]:
- """
- Check if complexity of a remote room is too great.
- Args:
- room_id
- remote_room_hosts
- Returns: bool of whether the complexity is too great, or None
- if unable to be fetched
- """
- max_complexity = self.hs.config.limit_remote_rooms.complexity
- complexity = await self.federation_handler.get_room_complexity(
- remote_room_hosts, room_id
- )
- if complexity:
- return complexity["v1"] > max_complexity
- return None
- async def _is_local_room_too_complex(self, room_id: str) -> bool:
- """
- Check if the complexity of a local room is too great.
- Args:
- room_id: The room ID to check for complexity.
- """
- max_complexity = self.hs.config.limit_remote_rooms.complexity
- complexity = await self.store.get_room_complexity(room_id)
- return complexity["v1"] > max_complexity
- async def _remote_join(
- self,
- requester: Requester,
- remote_room_hosts: List[str],
- room_id: str,
- user: UserID,
- content: dict,
- ) -> Tuple[str, int]:
- """Implements RoomMemberHandler._remote_join
- """
- # filter ourselves out of remote_room_hosts: do_invite_join ignores it
- # and if it is the only entry we'd like to return a 404 rather than a
- # 500.
- remote_room_hosts = [
- host for host in remote_room_hosts if host != self.hs.hostname
- ]
- if len(remote_room_hosts) == 0:
- raise SynapseError(404, "No known servers")
- if self.hs.config.limit_remote_rooms.enabled:
- # Fetch the room complexity
- too_complex = await self._is_remote_room_too_complex(
- room_id, remote_room_hosts
- )
- if too_complex is True:
- raise SynapseError(
- code=400,
- msg=self.hs.config.limit_remote_rooms.complexity_error,
- errcode=Codes.RESOURCE_LIMIT_EXCEEDED,
- )
- # We don't do an auth check if we are doing an invite
- # join dance for now, since we're kinda implicitly checking
- # that we are allowed to join when we decide whether or not we
- # need to do the invite/join dance.
- event_id, stream_id = await self.federation_handler.do_invite_join(
- remote_room_hosts, room_id, user.to_string(), content
- )
- await self._user_joined_room(user, room_id)
- # Check the room we just joined wasn't too large, if we didn't fetch the
- # complexity of it before.
- if self.hs.config.limit_remote_rooms.enabled:
- if too_complex is False:
- # We checked, and we're under the limit.
- return event_id, stream_id
- # Check again, but with the local state events
- too_complex = await self._is_local_room_too_complex(room_id)
- if too_complex is False:
- # We're under the limit.
- return event_id, stream_id
- # The room is too large. Leave.
- requester = types.create_requester(user, None, False, None)
- await self.update_membership(
- requester=requester, target=user, room_id=room_id, action="leave"
- )
- raise SynapseError(
- code=400,
- msg=self.hs.config.limit_remote_rooms.complexity_error,
- errcode=Codes.RESOURCE_LIMIT_EXCEEDED,
- )
- return event_id, stream_id
- async def _remote_reject_invite(
- self,
- requester: Requester,
- remote_room_hosts: List[str],
- room_id: str,
- target: UserID,
- content: dict,
- ) -> Tuple[Optional[str], int]:
- """Implements RoomMemberHandler._remote_reject_invite
- """
- fed_handler = self.federation_handler
- try:
- event, stream_id = await fed_handler.do_remotely_reject_invite(
- remote_room_hosts, room_id, target.to_string(), content=content,
- )
- return event.event_id, stream_id
- except Exception as e:
- # if we were unable to reject the exception, just mark
- # it as rejected on our end and plough ahead.
- #
- # The 'except' clause is very broad, but we need to
- # capture everything from DNS failures upwards
- #
- logger.warning("Failed to reject invite: %s", e)
- stream_id = await self.locally_reject_invite(target.to_string(), room_id)
- return None, stream_id
- async def _user_joined_room(self, target: UserID, room_id: str) -> None:
- """Implements RoomMemberHandler._user_joined_room
- """
- user_joined_room(self.distributor, target, room_id)
- async def _user_left_room(self, target: UserID, room_id: str) -> None:
- """Implements RoomMemberHandler._user_left_room
- """
- user_left_room(self.distributor, target, room_id)
- async def forget(self, user: UserID, room_id: str) -> None:
- user_id = user.to_string()
- member = await self.state_handler.get_current_state(
- room_id=room_id, event_type=EventTypes.Member, state_key=user_id
- )
- membership = member.membership if member else None
- if membership is not None and membership not in [
- Membership.LEAVE,
- Membership.BAN,
- ]:
- raise SynapseError(400, "User %s in room %s" % (user_id, room_id))
- if membership:
- await self.store.forget(user_id, room_id)
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