# -*- coding: utf-8 -*- # Copyright 2016 OpenMarket Ltd # # 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. from twisted.internet import defer from synapse.api.constants import EventTypes, Membership from synapse.api.errors import AuthError, Codes from synapse.events.utils import serialize_event from synapse.events.validator import EventValidator from synapse.handlers.presence import format_user_presence_state from synapse.streams.config import PaginationConfig from synapse.types import ( UserID, StreamToken, ) from synapse.util import unwrapFirstError from synapse.util.async import concurrently_execute from synapse.util.caches.snapshot_cache import SnapshotCache from synapse.util.logcontext import preserve_fn, preserve_context_over_deferred from synapse.visibility import filter_events_for_client from ._base import BaseHandler import logging logger = logging.getLogger(__name__) class InitialSyncHandler(BaseHandler): def __init__(self, hs): super(InitialSyncHandler, self).__init__(hs) self.hs = hs self.state = hs.get_state_handler() self.clock = hs.get_clock() self.validator = EventValidator() self.snapshot_cache = SnapshotCache() def snapshot_all_rooms(self, user_id=None, pagin_config=None, as_client_event=True, include_archived=False): """Retrieve a snapshot of all rooms the user is invited or has joined. This snapshot may include messages for all rooms where the user is joined, depending on the pagination config. Args: user_id (str): The ID of the user making the request. pagin_config (synapse.api.streams.PaginationConfig): The pagination config used to determine how many messages *PER ROOM* to return. as_client_event (bool): True to get events in client-server format. include_archived (bool): True to get rooms that the user has left Returns: A list of dicts with "room_id" and "membership" keys for all rooms the user is currently invited or joined in on. Rooms where the user is joined on, may return a "messages" key with messages, depending on the specified PaginationConfig. """ key = ( user_id, pagin_config.from_token, pagin_config.to_token, pagin_config.direction, pagin_config.limit, as_client_event, include_archived, ) now_ms = self.clock.time_msec() result = self.snapshot_cache.get(now_ms, key) if result is not None: return result return self.snapshot_cache.set(now_ms, key, self._snapshot_all_rooms( user_id, pagin_config, as_client_event, include_archived )) @defer.inlineCallbacks def _snapshot_all_rooms(self, user_id=None, pagin_config=None, as_client_event=True, include_archived=False): memberships = [Membership.INVITE, Membership.JOIN] if include_archived: memberships.append(Membership.LEAVE) room_list = yield self.store.get_rooms_for_user_where_membership_is( user_id=user_id, membership_list=memberships ) user = UserID.from_string(user_id) rooms_ret = [] now_token = yield self.hs.get_event_sources().get_current_token() presence_stream = self.hs.get_event_sources().sources["presence"] pagination_config = PaginationConfig(from_token=now_token) presence, _ = yield presence_stream.get_pagination_rows( user, pagination_config.get_source_config("presence"), None ) receipt_stream = self.hs.get_event_sources().sources["receipt"] receipt, _ = yield receipt_stream.get_pagination_rows( user, pagination_config.get_source_config("receipt"), None ) tags_by_room = yield self.store.get_tags_for_user(user_id) account_data, account_data_by_room = ( yield self.store.get_account_data_for_user(user_id) ) public_room_ids = yield self.store.get_public_room_ids() limit = pagin_config.limit if limit is None: limit = 10 @defer.inlineCallbacks def handle_room(event): d = { "room_id": event.room_id, "membership": event.membership, "visibility": ( "public" if event.room_id in public_room_ids else "private" ), } if event.membership == Membership.INVITE: time_now = self.clock.time_msec() d["inviter"] = event.sender invite_event = yield self.store.get_event(event.event_id) d["invite"] = serialize_event(invite_event, time_now, as_client_event) rooms_ret.append(d) if event.membership not in (Membership.JOIN, Membership.LEAVE): return try: if event.membership == Membership.JOIN: room_end_token = now_token.room_key deferred_room_state = self.state_handler.get_current_state( event.room_id ) elif event.membership == Membership.LEAVE: room_end_token = "s%d" % (event.stream_ordering,) deferred_room_state = self.store.get_state_for_events( [event.event_id], None ) deferred_room_state.addCallback( lambda states: states[event.event_id] ) (messages, token), current_state = yield preserve_context_over_deferred( defer.gatherResults( [ preserve_fn(self.store.get_recent_events_for_room)( event.room_id, limit=limit, end_token=room_end_token, ), deferred_room_state, ] ) ).addErrback(unwrapFirstError) messages = yield filter_events_for_client( self.store, user_id, messages ) start_token = now_token.copy_and_replace("room_key", token[0]) end_token = now_token.copy_and_replace("room_key", token[1]) time_now = self.clock.time_msec() d["messages"] = { "chunk": [ serialize_event(m, time_now, as_client_event) for m in messages ], "start": start_token.to_string(), "end": end_token.to_string(), } d["state"] = [ serialize_event(c, time_now, as_client_event) for c in current_state.values() ] account_data_events = [] tags = tags_by_room.get(event.room_id) if tags: account_data_events.append({ "type": "m.tag", "content": {"tags": tags}, }) account_data = account_data_by_room.get(event.room_id, {}) for account_data_type, content in account_data.items(): account_data_events.append({ "type": account_data_type, "content": content, }) d["account_data"] = account_data_events except Exception: logger.exception("Failed to get snapshot") yield concurrently_execute(handle_room, room_list, 10) account_data_events = [] for account_data_type, content in account_data.items(): account_data_events.append({ "type": account_data_type, "content": content, }) now = self.clock.time_msec() ret = { "rooms": rooms_ret, "presence": [ { "type": "m.presence", "content": format_user_presence_state(event, now), } for event in presence ], "account_data": account_data_events, "receipts": receipt, "end": now_token.to_string(), } defer.returnValue(ret) @defer.inlineCallbacks def room_initial_sync(self, requester, room_id, pagin_config=None): """Capture the a snapshot of a room. If user is currently a member of the room this will be what is currently in the room. If the user left the room this will be what was in the room when they left. Args: requester(Requester): The user to get a snapshot for. room_id(str): The room to get a snapshot of. pagin_config(synapse.streams.config.PaginationConfig): The pagination config used to determine how many messages to return. Raises: AuthError if the user wasn't in the room. Returns: A JSON serialisable dict with the snapshot of the room. """ user_id = requester.user.to_string() membership, member_event_id = yield self._check_in_room_or_world_readable( room_id, user_id, ) is_peeking = member_event_id is None if membership == Membership.JOIN: result = yield self._room_initial_sync_joined( user_id, room_id, pagin_config, membership, is_peeking ) elif membership == Membership.LEAVE: result = yield self._room_initial_sync_parted( user_id, room_id, pagin_config, membership, member_event_id, is_peeking ) account_data_events = [] tags = yield self.store.get_tags_for_room(user_id, room_id) if tags: account_data_events.append({ "type": "m.tag", "content": {"tags": tags}, }) account_data = yield self.store.get_account_data_for_room(user_id, room_id) for account_data_type, content in account_data.items(): account_data_events.append({ "type": account_data_type, "content": content, }) result["account_data"] = account_data_events defer.returnValue(result) @defer.inlineCallbacks def _room_initial_sync_parted(self, user_id, room_id, pagin_config, membership, member_event_id, is_peeking): room_state = yield self.store.get_state_for_events( [member_event_id], None ) room_state = room_state[member_event_id] limit = pagin_config.limit if pagin_config else None if limit is None: limit = 10 stream_token = yield self.store.get_stream_token_for_event( member_event_id ) messages, token = yield self.store.get_recent_events_for_room( room_id, limit=limit, end_token=stream_token ) messages = yield filter_events_for_client( self.store, user_id, messages, is_peeking=is_peeking ) start_token = StreamToken.START.copy_and_replace("room_key", token[0]) end_token = StreamToken.START.copy_and_replace("room_key", token[1]) time_now = self.clock.time_msec() defer.returnValue({ "membership": membership, "room_id": room_id, "messages": { "chunk": [serialize_event(m, time_now) for m in messages], "start": start_token.to_string(), "end": end_token.to_string(), }, "state": [serialize_event(s, time_now) for s in room_state.values()], "presence": [], "receipts": [], }) @defer.inlineCallbacks def _room_initial_sync_joined(self, user_id, room_id, pagin_config, membership, is_peeking): current_state = yield self.state.get_current_state( room_id=room_id, ) # TODO: These concurrently time_now = self.clock.time_msec() state = [ serialize_event(x, time_now) for x in current_state.values() ] now_token = yield self.hs.get_event_sources().get_current_token() limit = pagin_config.limit if pagin_config else None if limit is None: limit = 10 room_members = [ m for m in current_state.values() if m.type == EventTypes.Member and m.content["membership"] == Membership.JOIN ] presence_handler = self.hs.get_presence_handler() @defer.inlineCallbacks def get_presence(): states = yield presence_handler.get_states( [m.user_id for m in room_members], as_event=True, ) defer.returnValue(states) @defer.inlineCallbacks def get_receipts(): receipts = yield self.store.get_linearized_receipts_for_room( room_id, to_key=now_token.receipt_key, ) if not receipts: receipts = [] defer.returnValue(receipts) presence, receipts, (messages, token) = yield defer.gatherResults( [ preserve_fn(get_presence)(), preserve_fn(get_receipts)(), preserve_fn(self.store.get_recent_events_for_room)( room_id, limit=limit, end_token=now_token.room_key, ) ], consumeErrors=True, ).addErrback(unwrapFirstError) messages = yield filter_events_for_client( self.store, user_id, messages, is_peeking=is_peeking, ) start_token = now_token.copy_and_replace("room_key", token[0]) end_token = now_token.copy_and_replace("room_key", token[1]) time_now = self.clock.time_msec() ret = { "room_id": room_id, "messages": { "chunk": [serialize_event(m, time_now) for m in messages], "start": start_token.to_string(), "end": end_token.to_string(), }, "state": state, "presence": presence, "receipts": receipts, } if not is_peeking: ret["membership"] = membership defer.returnValue(ret) @defer.inlineCallbacks def _check_in_room_or_world_readable(self, room_id, user_id): try: # check_user_was_in_room will return the most recent membership # event for the user if: # * The user is a non-guest user, and was ever in the room # * The user is a guest user, and has joined the room # else it will throw. member_event = yield self.auth.check_user_was_in_room(room_id, user_id) defer.returnValue((member_event.membership, member_event.event_id)) return except AuthError: visibility = yield self.state_handler.get_current_state( room_id, EventTypes.RoomHistoryVisibility, "" ) if ( visibility and visibility.content["history_visibility"] == "world_readable" ): defer.returnValue((Membership.JOIN, None)) return raise AuthError( 403, "Guest access not allowed", errcode=Codes.GUEST_ACCESS_FORBIDDEN )