diff options
| -rw-r--r-- | changelog.d/3350.misc | 1 | ||||
| -rw-r--r-- | changelog.d/3555.feature | 1 | ||||
| -rw-r--r-- | changelog.d/3586.misc | 1 | ||||
| -rw-r--r-- | changelog.d/3590.misc | 1 | ||||
| -rw-r--r-- | changelog.d/3591.misc | 1 | ||||
| -rw-r--r-- | changelog.d/3592.misc | 1 | ||||
| -rw-r--r-- | docs/workers.rst | 4 | ||||
| -rw-r--r-- | synapse/api/auth.py | 34 | ||||
| -rw-r--r-- | synapse/app/client_reader.py | 14 | ||||
| -rw-r--r-- | synapse/events/snapshot.py | 3 | ||||
| -rw-r--r-- | synapse/handlers/__init__.py | 4 | ||||
| -rw-r--r-- | synapse/handlers/appservice.py | 5 | ||||
| -rw-r--r-- | synapse/handlers/federation.py | 13 | ||||
| -rw-r--r-- | synapse/handlers/initial_sync.py | 38 | ||||
| -rw-r--r-- | synapse/handlers/message.py | 271 | ||||
| -rw-r--r-- | synapse/handlers/pagination.py | 265 | ||||
| -rw-r--r-- | synapse/handlers/room.py | 6 | ||||
| -rw-r--r-- | synapse/rest/client/v1/admin.py | 8 | ||||
| -rw-r--r-- | synapse/rest/client/v1/room.py | 24 | ||||
| -rw-r--r-- | synapse/server.py | 17 | ||||
| -rw-r--r-- | synapse/state.py | 143 | ||||
| -rw-r--r-- | synapse/storage/events.py | 47 | ||||
| -rw-r--r-- | synapse/storage/push_rule.py | 13 | ||||
| -rw-r--r-- | synapse/storage/pusher.py | 2 | ||||
| -rw-r--r-- | synapse/storage/roommember.py | 15 | ||||
| -rw-r--r-- | synapse/visibility.py | 19 |
26 files changed, 518 insertions, 433 deletions
diff --git a/changelog.d/3350.misc b/changelog.d/3350.misc new file mode 100644 index 0000000000..3713cd6d63 --- /dev/null +++ b/changelog.d/3350.misc @@ -0,0 +1 @@ +Remove redundant checks on who_forgot_in_room \ No newline at end of file diff --git a/changelog.d/3555.feature b/changelog.d/3555.feature new file mode 100644 index 0000000000..ea4a85e0ae --- /dev/null +++ b/changelog.d/3555.feature @@ -0,0 +1 @@ +Add support for client_reader to handle more APIs diff --git a/changelog.d/3586.misc b/changelog.d/3586.misc new file mode 100644 index 0000000000..e853e2481b --- /dev/null +++ b/changelog.d/3586.misc @@ -0,0 +1 @@ +Fixes and optimisations for resolve_state_groups diff --git a/changelog.d/3590.misc b/changelog.d/3590.misc new file mode 100644 index 0000000000..0f1688fd0f --- /dev/null +++ b/changelog.d/3590.misc @@ -0,0 +1 @@ +Add some measure blocks to persist_events diff --git a/changelog.d/3591.misc b/changelog.d/3591.misc new file mode 100644 index 0000000000..f0137766a0 --- /dev/null +++ b/changelog.d/3591.misc @@ -0,0 +1 @@ +Fix some random logcontext leaks. \ No newline at end of file diff --git a/changelog.d/3592.misc b/changelog.d/3592.misc new file mode 100644 index 0000000000..60129569c2 --- /dev/null +++ b/changelog.d/3592.misc @@ -0,0 +1 @@ +Speed up calculating state deltas in persist_event loop diff --git a/docs/workers.rst b/docs/workers.rst index 1d521b9ec5..c5b37c3ded 100644 --- a/docs/workers.rst +++ b/docs/workers.rst @@ -206,6 +206,10 @@ Handles client API endpoints. It can handle REST endpoints matching the following regular expressions:: ^/_matrix/client/(api/v1|r0|unstable)/publicRooms$ + ^/_matrix/client/(api/v1|r0|unstable)/rooms/.*/joined_members$ + ^/_matrix/client/(api/v1|r0|unstable)/rooms/.*/context/.*$ + ^/_matrix/client/(api/v1|r0|unstable)/rooms/.*/members$ + ^/_matrix/client/(api/v1|r0|unstable)/rooms/.*/state$ ``synapse.app.user_dir`` ~~~~~~~~~~~~~~~~~~~~~~~~ diff --git a/synapse/api/auth.py b/synapse/api/auth.py index 535bdb449d..073229b4c4 100644 --- a/synapse/api/auth.py +++ b/synapse/api/auth.py @@ -739,3 +739,37 @@ class Auth(object): ) return query_params[0] + + @defer.inlineCallbacks + def check_in_room_or_world_readable(self, room_id, user_id): + """Checks that the user is or was in the room or the room is world + readable. If it isn't then an exception is raised. + + Returns: + Deferred[tuple[str, str|None]]: Resolves to the current membership of + the user in the room and the membership event ID of the user. If + the user is not in the room and never has been, then + `(Membership.JOIN, None)` is returned. + """ + + 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.check_user_was_in_room(room_id, user_id) + defer.returnValue((member_event.membership, member_event.event_id)) + except AuthError: + visibility = yield self.state.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 + ) diff --git a/synapse/app/client_reader.py b/synapse/app/client_reader.py index b0ea26dcb4..398bb36602 100644 --- a/synapse/app/client_reader.py +++ b/synapse/app/client_reader.py @@ -40,7 +40,13 @@ from synapse.replication.slave.storage.registration import SlavedRegistrationSto from synapse.replication.slave.storage.room import RoomStore from synapse.replication.slave.storage.transactions import TransactionStore from synapse.replication.tcp.client import ReplicationClientHandler -from synapse.rest.client.v1.room import PublicRoomListRestServlet +from synapse.rest.client.v1.room import ( + JoinedRoomMemberListRestServlet, + PublicRoomListRestServlet, + RoomEventContextServlet, + RoomMemberListRestServlet, + RoomStateRestServlet, +) from synapse.server import HomeServer from synapse.storage.engines import create_engine from synapse.util.httpresourcetree import create_resource_tree @@ -82,7 +88,13 @@ class ClientReaderServer(HomeServer): resources[METRICS_PREFIX] = MetricsResource(RegistryProxy) elif name == "client": resource = JsonResource(self, canonical_json=False) + PublicRoomListRestServlet(self).register(resource) + RoomMemberListRestServlet(self).register(resource) + JoinedRoomMemberListRestServlet(self).register(resource) + RoomStateRestServlet(self).register(resource) + RoomEventContextServlet(self).register(resource) + resources.update({ "/_matrix/client/r0": resource, "/_matrix/client/unstable": resource, diff --git a/synapse/events/snapshot.py b/synapse/events/snapshot.py index 189212b0fa..368b5f6ae4 100644 --- a/synapse/events/snapshot.py +++ b/synapse/events/snapshot.py @@ -249,7 +249,7 @@ class EventContext(object): @defer.inlineCallbacks def update_state(self, state_group, prev_state_ids, current_state_ids, - delta_ids): + prev_group, delta_ids): """Replace the state in the context """ @@ -260,6 +260,7 @@ class EventContext(object): self.state_group = state_group self._prev_state_ids = prev_state_ids + self.prev_group = prev_group self._current_state_ids = current_state_ids self.delta_ids = delta_ids diff --git a/synapse/handlers/__init__.py b/synapse/handlers/__init__.py index 4b9923d8c0..413425fed1 100644 --- a/synapse/handlers/__init__.py +++ b/synapse/handlers/__init__.py @@ -17,9 +17,7 @@ from .admin import AdminHandler from .directory import DirectoryHandler from .federation import FederationHandler from .identity import IdentityHandler -from .message import MessageHandler from .register import RegistrationHandler -from .room import RoomContextHandler from .search import SearchHandler @@ -44,10 +42,8 @@ class Handlers(object): def __init__(self, hs): self.registration_handler = RegistrationHandler(hs) - self.message_handler = MessageHandler(hs) self.federation_handler = FederationHandler(hs) self.directory_handler = DirectoryHandler(hs) self.admin_handler = AdminHandler(hs) self.identity_handler = IdentityHandler(hs) self.search_handler = SearchHandler(hs) - self.room_context_handler = RoomContextHandler(hs) diff --git a/synapse/handlers/appservice.py b/synapse/handlers/appservice.py index ec9fe01a5a..ee41aed69e 100644 --- a/synapse/handlers/appservice.py +++ b/synapse/handlers/appservice.py @@ -23,6 +23,7 @@ from twisted.internet import defer import synapse from synapse.api.constants import EventTypes +from synapse.metrics.background_process_metrics import run_as_background_process from synapse.util.logcontext import make_deferred_yieldable, run_in_background from synapse.util.metrics import Measure @@ -106,7 +107,9 @@ class ApplicationServicesHandler(object): yield self._check_user_exists(event.state_key) if not self.started_scheduler: - self.scheduler.start().addErrback(log_failure) + def start_scheduler(): + return self.scheduler.start().addErrback(log_failure) + run_as_background_process("as_scheduler", start_scheduler) self.started_scheduler = True # Fork off pushes to these services diff --git a/synapse/handlers/federation.py b/synapse/handlers/federation.py index 14654d59f1..145c1a21d4 100644 --- a/synapse/handlers/federation.py +++ b/synapse/handlers/federation.py @@ -1980,10 +1980,6 @@ class FederationHandler(BaseHandler): current_state_ids.update(state_updates) - if context.delta_ids is not None: - delta_ids = dict(context.delta_ids) - delta_ids.update(state_updates) - prev_state_ids = yield context.get_prev_state_ids(self.store) prev_state_ids = dict(prev_state_ids) @@ -1991,11 +1987,13 @@ class FederationHandler(BaseHandler): k: a.event_id for k, a in iteritems(auth_events) }) + # create a new state group as a delta from the existing one. + prev_group = context.state_group state_group = yield self.store.store_state_group( event.event_id, event.room_id, - prev_group=context.prev_group, - delta_ids=delta_ids, + prev_group=prev_group, + delta_ids=state_updates, current_state_ids=current_state_ids, ) @@ -2003,7 +2001,8 @@ class FederationHandler(BaseHandler): state_group=state_group, current_state_ids=current_state_ids, prev_state_ids=prev_state_ids, - delta_ids=delta_ids, + prev_group=prev_group, + delta_ids=state_updates, ) @defer.inlineCallbacks diff --git a/synapse/handlers/initial_sync.py b/synapse/handlers/initial_sync.py index fb11716eb8..40e7580a61 100644 --- a/synapse/handlers/initial_sync.py +++ b/synapse/handlers/initial_sync.py @@ -148,13 +148,15 @@ class InitialSyncHandler(BaseHandler): 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 + deferred_room_state = run_in_background( + 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 = run_in_background( + self.store.get_state_for_events, + [event.event_id], None, ) deferred_room_state.addCallback( lambda states: states[event.event_id] @@ -387,19 +389,21 @@ class InitialSyncHandler(BaseHandler): receipts = [] defer.returnValue(receipts) - presence, receipts, (messages, token) = yield defer.gatherResults( - [ - run_in_background(get_presence), - run_in_background(get_receipts), - run_in_background( - self.store.get_recent_events_for_room, - room_id, - limit=limit, - end_token=now_token.room_key, - ) - ], - consumeErrors=True, - ).addErrback(unwrapFirstError) + presence, receipts, (messages, token) = yield make_deferred_yieldable( + defer.gatherResults( + [ + run_in_background(get_presence), + run_in_background(get_receipts), + run_in_background( + 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, diff --git a/synapse/handlers/message.py b/synapse/handlers/message.py index 7571975c22..39d7724778 100644 --- a/synapse/handlers/message.py +++ b/synapse/handlers/message.py @@ -23,7 +23,6 @@ from canonicaljson import encode_canonical_json, json from twisted.internet import defer from twisted.internet.defer import succeed -from twisted.python.failure import Failure from synapse.api.constants import MAX_DEPTH, EventTypes, Membership from synapse.api.errors import AuthError, Codes, ConsentNotGivenError, SynapseError @@ -32,247 +31,26 @@ from synapse.crypto.event_signing import add_hashes_and_signatures from synapse.events.utils import serialize_event from synapse.events.validator import EventValidator from synapse.replication.http.send_event import send_event_to_master -from synapse.types import RoomAlias, RoomStreamToken, UserID -from synapse.util.async import Linearizer, ReadWriteLock +from synapse.types import RoomAlias, UserID +from synapse.util.async import Linearizer from synapse.util.frozenutils import frozendict_json_encoder from synapse.util.logcontext import run_in_background from synapse.util.metrics import measure_func -from synapse.util.stringutils import random_string -from synapse.visibility import filter_events_for_client from ._base import BaseHandler logger = logging.getLogger(__name__) -class PurgeStatus(object): - """Object tracking the status of a purge request - - This class contains information on the progress of a purge request, for - return by get_purge_status. - - Attributes: - status (int): Tracks whether this request has completed. One of - STATUS_{ACTIVE,COMPLETE,FAILED} +class MessageHandler(object): + """Contains some read only APIs to get state about a room """ - STATUS_ACTIVE = 0 - STATUS_COMPLETE = 1 - STATUS_FAILED = 2 - - STATUS_TEXT = { - STATUS_ACTIVE: "active", - STATUS_COMPLETE: "complete", - STATUS_FAILED: "failed", - } - - def __init__(self): - self.status = PurgeStatus.STATUS_ACTIVE - - def asdict(self): - return { - "status": PurgeStatus.STATUS_TEXT[self.status] - } - - -class MessageHandler(BaseHandler): - def __init__(self, hs): - super(MessageHandler, self).__init__(hs) - self.hs = hs - self.state = hs.get_state_handler() + self.auth = hs.get_auth() self.clock = hs.get_clock() - - self.pagination_lock = ReadWriteLock() - self._purges_in_progress_by_room = set() - # map from purge id to PurgeStatus - self._purges_by_id = {} - - def start_purge_history(self, room_id, token, - delete_local_events=False): - """Start off a history purge on a room. - - Args: - room_id (str): The room to purge from - - token (str): topological token to delete events before - delete_local_events (bool): True to delete local events as well as - remote ones - - Returns: - str: unique ID for this purge transaction. - """ - if room_id in self._purges_in_progress_by_room: - raise SynapseError( - 400, - "History purge already in progress for %s" % (room_id, ), - ) - - purge_id = random_string(16) - - # we log the purge_id here so that it can be tied back to the - # request id in the log lines. - logger.info("[purge] starting purge_id %s", purge_id) - - self._purges_by_id[purge_id] = PurgeStatus() - run_in_background( - self._purge_history, - purge_id, room_id, token, delete_local_events, - ) - return purge_id - - @defer.inlineCallbacks - def _purge_history(self, purge_id, room_id, token, - delete_local_events): - """Carry out a history purge on a room. - - Args: - purge_id (str): The id for this purge - room_id (str): The room to purge from - token (str): topological token to delete events before - delete_local_events (bool): True to delete local events as well as - remote ones - - Returns: - Deferred - """ - self._purges_in_progress_by_room.add(room_id) - try: - with (yield self.pagination_lock.write(room_id)): - yield self.store.purge_history( - room_id, token, delete_local_events, - ) - logger.info("[purge] complete") - self._purges_by_id[purge_id].status = PurgeStatus.STATUS_COMPLETE - except Exception: - logger.error("[purge] failed: %s", Failure().getTraceback().rstrip()) - self._purges_by_id[purge_id].status = PurgeStatus.STATUS_FAILED - finally: - self._purges_in_progress_by_room.discard(room_id) - - # remove the purge from the list 24 hours after it completes - def clear_purge(): - del self._purges_by_id[purge_id] - self.hs.get_reactor().callLater(24 * 3600, clear_purge) - - def get_purge_status(self, purge_id): - """Get the current status of an active purge - - Args: - purge_id (str): purge_id returned by start_purge_history - - Returns: - PurgeStatus|None - """ - return self._purges_by_id.get(purge_id) - - @defer.inlineCallbacks - def get_messages(self, requester, room_id=None, pagin_config=None, - as_client_event=True, event_filter=None): - """Get messages in a room. - - Args: - requester (Requester): The user requesting messages. - room_id (str): The room they want messages from. - pagin_config (synapse.api.streams.PaginationConfig): The pagination - config rules to apply, if any. - as_client_event (bool): True to get events in client-server format. - event_filter (Filter): Filter to apply to results or None - Returns: - dict: Pagination API results - """ - user_id = requester.user.to_string() - - if pagin_config.from_token: - room_token = pagin_config.from_token.room_key - else: - pagin_config.from_token = ( - yield self.hs.get_event_sources().get_current_token_for_room( - room_id=room_id - ) - ) - room_token = pagin_config.from_token.room_key - - room_token = RoomStreamToken.parse(room_token) - - pagin_config.from_token = pagin_config.from_token.copy_and_replace( - "room_key", str(room_token) - ) - - source_config = pagin_config.get_source_config("room") - - with (yield self.pagination_lock.read(room_id)): - membership, member_event_id = yield self._check_in_room_or_world_readable( - room_id, user_id - ) - - if source_config.direction == 'b': - # if we're going backwards, we might need to backfill. This - # requires that we have a topo token. - if room_token.topological: - max_topo = room_token.topological - else: - max_topo = yield self.store.get_max_topological_token( - room_id, room_token.stream - ) - - if membership == Membership.LEAVE: - # If they have left the room then clamp the token to be before - # they left the room, to save the effort of loading from the - # database. - leave_token = yield self.store.get_topological_token_for_event( - member_event_id - ) - leave_token = RoomStreamToken.parse(leave_token) - if leave_token.topological < max_topo: - source_config.from_key = str(leave_token) - - yield self.hs.get_handlers().federation_handler.maybe_backfill( - room_id, max_topo - ) - - events, next_key = yield self.store.paginate_room_events( - room_id=room_id, - from_key=source_config.from_key, - to_key=source_config.to_key, - direction=source_config.direction, - limit=source_config.limit, - event_filter=event_filter, - ) - - next_token = pagin_config.from_token.copy_and_replace( - "room_key", next_key - ) - - if not events: - defer.returnValue({ - "chunk": [], - "start": pagin_config.from_token.to_string(), - "end": next_token.to_string(), - }) - - if event_filter: - events = event_filter.filter(events) - - events = yield filter_events_for_client( - self.store, - user_id, - events, - is_peeking=(member_event_id is None), - ) - - time_now = self.clock.time_msec() - - chunk = { - "chunk": [ - serialize_event(e, time_now, as_client_event) - for e in events - ], - "start": pagin_config.from_token.to_string(), - "end": next_token.to_string(), - } - - defer.returnValue(chunk) + self.state = hs.get_state_handler() + self.store = hs.get_datastore() @defer.inlineCallbacks def get_room_data(self, user_id=None, room_id=None, @@ -286,12 +64,12 @@ class MessageHandler(BaseHandler): Raises: SynapseError if something went wrong. """ - membership, membership_event_id = yield self._check_in_room_or_world_readable( + membership, membership_event_id = yield self.auth.check_in_room_or_world_readable( room_id, user_id ) if membership == Membership.JOIN: - data = yield self.state_handler.get_current_state( + data = yield self.state.get_current_state( room_id, event_type, state_key ) elif membership == Membership.LEAVE: @@ -304,31 +82,6 @@ class MessageHandler(BaseHandler): defer.returnValue(data) @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 - ) - - @defer.inlineCallbacks def get_state_events(self, user_id, room_id, is_guest=False): """Retrieve all state events for a given room. If the user is joined to the room then return the current state. If the user has @@ -340,12 +93,12 @@ class MessageHandler(BaseHandler): Returns: A list of dicts representing state events. [{}, {}, {}] """ - membership, membership_event_id = yield self._check_in_room_or_world_readable( + membership, membership_event_id = yield self.auth.check_in_room_or_world_readable( room_id, user_id ) if membership == Membership.JOIN: - room_state = yield self.state_handler.get_current_state(room_id) + room_state = yield self.state.get_current_state(room_id) elif membership == Membership.LEAVE: room_state = yield self.store.get_state_for_events( [membership_event_id], None @@ -373,7 +126,7 @@ class MessageHandler(BaseHandler): if not requester.app_service: # We check AS auth after fetching the room membership, as it # requires us to pull out all joined members anyway. - membership, _ = yield self._check_in_room_or_world_readable( + membership, _ = yield self.auth.check_in_room_or_world_readable( room_id, user_id ) if membership != Membership.JOIN: diff --git a/synapse/handlers/pagination.py b/synapse/handlers/pagination.py new file mode 100644 index 0000000000..b2849783ed --- /dev/null +++ b/synapse/handlers/pagination.py @@ -0,0 +1,265 @@ +# -*- coding: utf-8 -*- +# Copyright 2014 - 2016 OpenMarket Ltd +# Copyright 2017 - 2018 New Vector 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. +import logging + +from twisted.internet import defer +from twisted.python.failure import Failure + +from synapse.api.constants import Membership +from synapse.api.errors import SynapseError +from synapse.events.utils import serialize_event +from synapse.types import RoomStreamToken +from synapse.util.async import ReadWriteLock +from synapse.util.logcontext import run_in_background +from synapse.util.stringutils import random_string +from synapse.visibility import filter_events_for_client + +logger = logging.getLogger(__name__) + + +class PurgeStatus(object): + """Object tracking the status of a purge request + + This class contains information on the progress of a purge request, for + return by get_purge_status. + + Attributes: + status (int): Tracks whether this request has completed. One of + STATUS_{ACTIVE,COMPLETE,FAILED} + """ + + STATUS_ACTIVE = 0 + STATUS_COMPLETE = 1 + STATUS_FAILED = 2 + + STATUS_TEXT = { + STATUS_ACTIVE: "active", + STATUS_COMPLETE: "complete", + STATUS_FAILED: "failed", + } + + def __init__(self): + self.status = PurgeStatus.STATUS_ACTIVE + + def asdict(self): + return { + "status": PurgeStatus.STATUS_TEXT[self.status] + } + + +class PaginationHandler(object): + """Handles pagination and purge history requests. + + These are in the same handler due to the fact we need to block clients + paginating during a purge. + """ + + def __init__(self, hs): + self.hs = hs + self.auth = hs.get_auth() + self.store = hs.get_datastore() + self.clock = hs.get_clock() + + self.pagination_lock = ReadWriteLock() + self._purges_in_progress_by_room = set() + # map from purge id to PurgeStatus + self._purges_by_id = {} + + def start_purge_history(self, room_id, token, + delete_local_events=False): + """Start off a history purge on a room. + + Args: + room_id (str): The room to purge from + + token (str): topological token to delete events before + delete_local_events (bool): True to delete local events as well as + remote ones + + Returns: + str: unique ID for this purge transaction. + """ + if room_id in self._purges_in_progress_by_room: + raise SynapseError( + 400, + "History purge already in progress for %s" % (room_id, ), + ) + + purge_id = random_string(16) + + # we log the purge_id here so that it can be tied back to the + # request id in the log lines. + logger.info("[purge] starting purge_id %s", purge_id) + + self._purges_by_id[purge_id] = PurgeStatus() + run_in_background( + self._purge_history, + purge_id, room_id, token, delete_local_events, + ) + return purge_id + + @defer.inlineCallbacks + def _purge_history(self, purge_id, room_id, token, + delete_local_events): + """Carry out a history purge on a room. + + Args: + purge_id (str): The id for this purge + room_id (str): The room to purge from + token (str): topological token to delete events before + delete_local_events (bool): True to delete local events as well as + remote ones + + Returns: + Deferred + """ + self._purges_in_progress_by_room.add(room_id) + try: + with (yield self.pagination_lock.write(room_id)): + yield self.store.purge_history( + room_id, token, delete_local_events, + ) + logger.info("[purge] complete") + self._purges_by_id[purge_id].status = PurgeStatus.STATUS_COMPLETE + except Exception: + logger.error("[purge] failed: %s", Failure().getTraceback().rstrip()) + self._purges_by_id[purge_id].status = PurgeStatus.STATUS_FAILED + finally: + self._purges_in_progress_by_room.discard(room_id) + + # remove the purge from the list 24 hours after it completes + def clear_purge(): + del self._purges_by_id[purge_id] + self.hs.get_reactor().callLater(24 * 3600, clear_purge) + + def get_purge_status(self, purge_id): + """Get the current status of an active purge + + Args: + purge_id (str): purge_id returned by start_purge_history + + Returns: + PurgeStatus|None + """ + return self._purges_by_id.get(purge_id) + + @defer.inlineCallbacks + def get_messages(self, requester, room_id=None, pagin_config=None, + as_client_event=True, event_filter=None): + """Get messages in a room. + + Args: + requester (Requester): The user requesting messages. + room_id (str): The room they want messages from. + pagin_config (synapse.api.streams.PaginationConfig): The pagination + config rules to apply, if any. + as_client_event (bool): True to get events in client-server format. + event_filter (Filter): Filter to apply to results or None + Returns: + dict: Pagination API results + """ + user_id = requester.user.to_string() + + if pagin_config.from_token: + room_token = pagin_config.from_token.room_key + else: + pagin_config.from_token = ( + yield self.hs.get_event_sources().get_current_token_for_room( + room_id=room_id + ) + ) + room_token = pagin_config.from_token.room_key + + room_token = RoomStreamToken.parse(room_token) + + pagin_config.from_token = pagin_config.from_token.copy_and_replace( + "room_key", str(room_token) + ) + + source_config = pagin_config.get_source_config("room") + + with (yield self.pagination_lock.read(room_id)): + membership, member_event_id = yield self.auth.check_in_room_or_world_readable( + room_id, user_id + ) + + if source_config.direction == 'b': + # if we're going backwards, we might need to backfill. This + # requires that we have a topo token. + if room_token.topological: + max_topo = room_token.topological + else: + max_topo = yield self.store.get_max_topological_token( + room_id, room_token.stream + ) + + if membership == Membership.LEAVE: + # If they have left the room then clamp the token to be before + # they left the room, to save the effort of loading from the + # database. + leave_token = yield self.store.get_topological_token_for_event( + member_event_id + ) + leave_token = RoomStreamToken.parse(leave_token) + if leave_token.topological < max_topo: + source_config.from_key = str(leave_token) + + yield self.hs.get_handlers().federation_handler.maybe_backfill( + room_id, max_topo + ) + + events, next_key = yield self.store.paginate_room_events( + room_id=room_id, + from_key=source_config.from_key, + to_key=source_config.to_key, + direction=source_config.direction, + limit=source_config.limit, + event_filter=event_filter, + ) + + next_token = pagin_config.from_token.copy_and_replace( + "room_key", next_key + ) + + if not events: + defer.returnValue({ + "chunk": [], + "start": pagin_config.from_token.to_string(), + "end": next_token.to_string(), + }) + + if event_filter: + events = event_filter.filter(events) + + events = yield filter_events_for_client( + self.store, + user_id, + events, + is_peeking=(member_event_id is None), + ) + + time_now = self.clock.time_msec() + + chunk = { + "chunk": [ + serialize_event(e, time_now, as_client_event) + for e in events + ], + "start": pagin_config.from_token.to_string(), + "end": next_token.to_string(), + } + + defer.returnValue(chunk) diff --git a/synapse/handlers/room.py b/synapse/handlers/room.py index f67512078b..6150b7e226 100644 --- a/synapse/handlers/room.py +++ b/synapse/handlers/room.py @@ -395,7 +395,11 @@ class RoomCreationHandler(BaseHandler): ) -class RoomContextHandler(BaseHandler): +class RoomContextHandler(object): + def __init__(self, hs): + self.hs = hs + self.store = hs.get_datastore() + @defer.inlineCallbacks def get_event_context(self, user, room_id, event_id, limit): """Retrieves events, pagination tokens and state around a given event diff --git a/synapse/rest/client/v1/admin.py b/synapse/rest/client/v1/admin.py index 9e9c175970..99f6c6e3c3 100644 --- a/synapse/rest/client/v1/admin.py +++ b/synapse/rest/client/v1/admin.py @@ -244,7 +244,7 @@ class PurgeHistoryRestServlet(ClientV1RestServlet): hs (synapse.server.HomeServer) """ super(PurgeHistoryRestServlet, self).__init__(hs) - self.handlers = hs.get_handlers() + self.pagination_handler = hs.get_pagination_handler() self.store = hs.get_datastore() @defer.inlineCallbacks @@ -319,7 +319,7 @@ class PurgeHistoryRestServlet(ClientV1RestServlet): errcode=Codes.BAD_JSON, ) - purge_id = yield self.handlers.message_handler.start_purge_history( + purge_id = yield self.pagination_handler.start_purge_history( room_id, token, delete_local_events=delete_local_events, ) @@ -341,7 +341,7 @@ class PurgeHistoryStatusRestServlet(ClientV1RestServlet): hs (synapse.server.HomeServer) """ super(PurgeHistoryStatusRestServlet, self).__init__(hs) - self.handlers = hs.get_handlers() + self.pagination_handler = hs.get_pagination_handler() @defer.inlineCallbacks def on_GET(self, request, purge_id): @@ -351,7 +351,7 @@ class PurgeHistoryStatusRestServlet(ClientV1RestServlet): if not is_admin: raise AuthError(403, "You are not a server admin") - purge_status = self.handlers.message_handler.get_purge_status(purge_id) + purge_status = self.pagination_handler.get_purge_status(purge_id) if purge_status is None: raise NotFoundError("purge id '%s' not found" % purge_id) diff --git a/synapse/rest/client/v1/room.py b/synapse/rest/client/v1/room.py index b9512a2b61..b7bd878c90 100644 --- a/synapse/rest/client/v1/room.py +++ b/synapse/rest/client/v1/room.py @@ -90,6 +90,7 @@ class RoomStateEventRestServlet(ClientV1RestServlet): self.handlers = hs.get_handlers() self.event_creation_hander = hs.get_event_creation_handler() self.room_member_handler = hs.get_room_member_handler() + self.message_handler = hs.get_message_handler() def register(self, http_server): # /room/$roomid/state/$eventtype @@ -124,7 +125,7 @@ class RoomStateEventRestServlet(ClientV1RestServlet): format = parse_string(request, "format", default="content", allowed_values=["content", "event"]) - msg_handler = self.handlers.message_handler + msg_handler = self.message_handler data = yield msg_handler.get_room_data( user_id=requester.user.to_string(), room_id=room_id, @@ -377,14 +378,13 @@ class RoomMemberListRestServlet(ClientV1RestServlet): def __init__(self, hs): super(RoomMemberListRestServlet, self).__init__(hs) - self.handlers = hs.get_handlers() + self.message_handler = hs.get_message_handler() @defer.inlineCallbacks def on_GET(self, request, room_id): # TODO support Pagination stream API (limit/tokens) requester = yield self.auth.get_user_by_req(request) - handler = self.handlers.message_handler - events = yield handler.get_state_events( + events = yield self.message_handler.get_state_events( room_id=room_id, user_id=requester.user.to_string(), ) @@ -406,7 +406,7 @@ class JoinedRoomMemberListRestServlet(ClientV1RestServlet): def __init__(self, hs): super(JoinedRoomMemberListRestServlet, self).__init__(hs) - self.message_handler = hs.get_handlers().message_handler + self.message_handler = hs.get_message_handler() @defer.inlineCallbacks def on_GET(self, request, room_id): @@ -427,7 +427,7 @@ class RoomMessageListRestServlet(ClientV1RestServlet): def __init__(self, hs): super(RoomMessageListRestServlet, self).__init__(hs) - self.handlers = hs.get_handlers() + self.pagination_handler = hs.get_pagination_handler() @defer.inlineCallbacks def on_GET(self, request, room_id): @@ -442,8 +442,7 @@ class RoomMessageListRestServlet(ClientV1RestServlet): event_filter = Filter(json.loads(filter_json)) else: event_filter = None - handler = self.handlers.message_handler - msgs = yield handler.get_messages( + msgs = yield self.pagination_handler.get_messages( room_id=room_id, requester=requester, pagin_config=pagination_config, @@ -460,14 +459,13 @@ class RoomStateRestServlet(ClientV1RestServlet): def __init__(self, hs): super(RoomStateRestServlet, self).__init__(hs) - self.handlers = hs.get_handlers() + self.message_handler = hs.get_message_handler() @defer.inlineCallbacks def on_GET(self, request, room_id): requester = yield self.auth.get_user_by_req(request, allow_guest=True) - handler = self.handlers.message_handler # Get all the current state for this room - events = yield handler.get_state_events( + events = yield self.message_handler.get_state_events( room_id=room_id, user_id=requester.user.to_string(), is_guest=requester.is_guest, @@ -525,7 +523,7 @@ class RoomEventContextServlet(ClientV1RestServlet): def __init__(self, hs): super(RoomEventContextServlet, self).__init__(hs) self.clock = hs.get_clock() - self.handlers = hs.get_handlers() + self.room_context_handler = hs.get_room_context_handler() @defer.inlineCallbacks def on_GET(self, request, room_id, event_id): @@ -533,7 +531,7 @@ class RoomEventContextServlet(ClientV1RestServlet): limit = parse_integer(request, "limit", default=10) - results = yield self.handlers.room_context_handler.get_event_context( + results = yield self.room_context_handler.get_event_context( requester.user, room_id, event_id, diff --git a/synapse/server.py b/synapse/server.py index fd4f992258..140be9ebe8 100644 --- a/synapse/server.py +++ b/synapse/server.py @@ -52,12 +52,13 @@ from synapse.handlers.e2e_keys import E2eKeysHandler from synapse.handlers.events import EventHandler, EventStreamHandler from synapse.handlers.groups_local import GroupsLocalHandler from synapse.handlers.initial_sync import InitialSyncHandler -from synapse.handlers.message import EventCreationHandler +from synapse.handlers.message import EventCreationHandler, MessageHandler +from synapse.handlers.pagination import PaginationHandler from synapse.handlers.presence import PresenceHandler from synapse.handlers.profile import ProfileHandler from synapse.handlers.read_marker import ReadMarkerHandler from synapse.handlers.receipts import ReceiptsHandler -from synapse.handlers.room import RoomCreationHandler +from synapse.handlers.room import RoomContextHandler, RoomCreationHandler from synapse.handlers.room_list import RoomListHandler from synapse.handlers.room_member import RoomMemberMasterHandler from synapse.handlers.room_member_worker import RoomMemberWorkerHandler @@ -165,6 +166,9 @@ class HomeServer(object): 'federation_registry', 'server_notices_manager', 'server_notices_sender', + 'message_handler', + 'pagination_handler', + 'room_context_handler', ] def __init__(self, hostname, reactor=None, **kwargs): @@ -431,6 +435,15 @@ class HomeServer(object): return WorkerServerNoticesSender(self) return ServerNoticesSender(self) + def build_message_handler(self): + return MessageHandler(self) + + def build_pagination_handler(self): + return PaginationHandler(self) + + def build_room_context_handler(self): + return RoomContextHandler(self) + def remove_pusher(self, app_id, push_key, user_id): return self.get_pusherpool().remove_pusher(app_id, push_key, user_id) diff --git a/synapse/state.py b/synapse/state.py index 32125c95df..033f55d967 100644 --- a/synapse/state.py +++ b/synapse/state.py @@ -471,69 +471,39 @@ class StateResolutionHandler(object): "Resolving state for %s with %d groups", room_id, len(state_groups_ids) ) - # build a map from state key to the event_ids which set that state. - # dict[(str, str), set[str]) - state = {} + # start by assuming we won't have any conflicted state, and build up the new + # state map by iterating through the state groups. If we discover a conflict, + # we give up and instead use `resolve_events_with_factory`. + # + # XXX: is this actually worthwhile, or should we just let + # resolve_events_with_factory do it? + new_state = {} + conflicted_state = False for st in itervalues(state_groups_ids): for key, e_id in iteritems(st): - state.setdefault(key, set()).add(e_id) - - # build a map from state key to the event_ids which set that state, - # including only those where there are state keys in conflict. - conflicted_state = { - k: list(v) - for k, v in iteritems(state) - if len(v) > 1 - } + if key in new_state: + conflicted_state = True + break + new_state[key] = e_id + if conflicted_state: + break if conflicted_state: logger.info("Resolving conflicted state for %r", room_id) with Measure(self.clock, "state._resolve_events"): new_state = yield resolve_events_with_factory( - list(state_groups_ids.values()), + list(itervalues(state_groups_ids)), event_map=event_map, state_map_factory=state_map_factory, ) - else: - new_state = { - key: e_ids.pop() for key, e_ids in iteritems(state) - } - with Measure(self.clock, "state.create_group_ids"): - # if the new state matches any of the input state groups, we can - # use that state group again. Otherwise we will generate a state_id - # which will be used as a cache key for future resolutions, but - # not get persisted. - state_group = None - new_state_event_ids = frozenset(itervalues(new_state)) - for sg, events in iteritems(state_groups_ids): - if new_state_event_ids == frozenset(e_id for e_id in events): - state_group = sg - break + # if the new state matches any of the input state groups, we can + # use that state group again. Otherwise we will generate a state_id + # which will be used as a cache key for future resolutions, but + # not get persisted. - # TODO: We want to create a state group for this set of events, to - # increase cache hits, but we need to make sure that it doesn't - # end up as a prev_group without being added to the database - - prev_group = None - delta_ids = None - for old_group, old_ids in iteritems(state_groups_ids): - if not set(new_state) - set(old_ids): - n_delta_ids = { - k: v - for k, v in iteritems(new_state) - if old_ids.get(k) != v - } - if not delta_ids or len(n_delta_ids) < len(delta_ids): - prev_group = old_group - delta_ids = n_delta_ids - - cache = _StateCacheEntry( - state=new_state, - state_group=state_group, - prev_group=prev_group, - delta_ids=delta_ids, - ) + with Measure(self.clock, "state.create_group_ids"): + cache = _make_state_cache_entry(new_state, state_groups_ids) if self._state_cache is not None: self._state_cache[group_names] = cache @@ -541,6 +511,70 @@ class StateResolutionHandler(object): defer.returnValue(cache) +def _make_state_cache_entry( + new_state, + state_groups_ids, +): + """Given a resolved state, and a set of input state groups, pick one to base + a new state group on (if any), and return an appropriately-constructed + _StateCacheEntry. + + Args: + new_state (dict[(str, str), str]): resolved state map (mapping from + (type, state_key) to event_id) + + state_groups_ids (dict[int, dict[(str, str), str]]): + map from state group id to the state in that state group + (where 'state' is a map from state key to event id) + + Returns: + _StateCacheEntry + """ + # if the new state matches any of the input state groups, we can + # use that state group again. Otherwise we will generate a state_id + # which will be used as a cache key for future resolutions, but + # not get persisted. + + # first look for exact matches + new_state_event_ids = set(itervalues(new_state)) + for sg, state in iteritems(state_groups_ids): + if len(new_state_event_ids) != len(state): + continue + + old_state_event_ids = set(itervalues(state)) + if new_state_event_ids == old_state_event_ids: + # got an exact match. + return _StateCacheEntry( + state=new_state, + state_group=sg, + ) + + # TODO: We want to create a state group for this set of events, to + # increase cache hits, but we need to make sure that it doesn't + # end up as a prev_group without being added to the database + + # failing that, look for the closest match. + prev_group = None + delta_ids = None + + for old_group, old_state in iteritems(state_groups_ids): + n_delta_ids = { + k: v + for k, v in iteritems(new_state) + if old_state.get(k) != v + } + if not delta_ids or len(n_delta_ids) < len(delta_ids): + prev_group = old_group + delta_ids = n_delta_ids + + return _StateCacheEntry( + state=new_state, + state_group=None, + prev_group=prev_group, + delta_ids=delta_ids, + ) + + def _ordered_events(events): def key_func(e): return -int(e.depth), hashlib.sha1(e.event_id.encode()).hexdigest() @@ -582,7 +616,7 @@ def _seperate(state_sets): with them in different state sets. Args: - state_sets(list[dict[(str, str), str]]): + state_sets(iterable[dict[(str, str), str]]): List of dicts of (type, state_key) -> event_id, which are the different state groups to resolve. @@ -596,10 +630,11 @@ def _seperate(state_sets): conflicted_state is a dict mapping (type, state_key) to a set of event ids for conflicted state keys. """ - unconflicted_state = dict(state_sets[0]) + state_set_iterator = iter(state_sets) + unconflicted_state = dict(next(state_set_iterator)) conflicted_state = {} - for state_set in state_sets[1:]: + for state_set in state_set_iterator: for key, value in iteritems(state_set): # Check if there is an unconflicted entry for the state key. unconflicted_value = unconflicted_state.get(key) diff --git a/synapse/storage/events.py b/synapse/storage/events.py index c2910094d0..19c05dc8d6 100644 --- a/synapse/storage/events.py +++ b/synapse/storage/events.py @@ -39,7 +39,7 @@ from synapse.types import RoomStreamToken, get_domain_from_id from synapse.util.async import ObservableDeferred from synapse.util.caches.descriptors import cached, cachedInlineCallbacks from synapse.util.frozenutils import frozendict_json_encoder -from synapse.util.logcontext import make_deferred_yieldable +from synapse.util.logcontext import PreserveLoggingContext, make_deferred_yieldable from synapse.util.logutils import log_function from synapse.util.metrics import Measure @@ -147,7 +147,8 @@ class _EventPeristenceQueue(object): # callbacks on the deferred. try: ret = yield per_item_callback(item) - item.deferred.callback(ret) + with PreserveLoggingContext(): + item.deferred.callback(ret) except Exception: item.deferred.errback() finally: @@ -417,18 +418,27 @@ class EventsStore(EventsWorkerStore): logger.info( "Calculating state delta for room %s", room_id, ) - current_state = yield self._get_new_state_after_events( - room_id, - ev_ctx_rm, - latest_event_ids, - new_latest_event_ids, - ) + + with Measure( + self._clock, + "persist_events.get_new_state_after_events", + ): + current_state = yield self._get_new_state_after_events( + room_id, + ev_ctx_rm, + latest_event_ids, + new_latest_event_ids, + ) + if current_state is not None: current_state_for_room[room_id] = current_state - delta = yield self._calculate_state_delta( - room_id, current_state, - ) - if delta is not None: + with Measure( + self._clock, + "persist_events.calculate_state_delta", + ): + delta = yield self._calculate_state_delta( + room_id, current_state, + ) state_delta_for_room[room_id] = delta yield self.runInteraction( @@ -644,21 +654,14 @@ class EventsStore(EventsWorkerStore): """ existing_state = yield self.get_current_state_ids(room_id) - existing_events = set(itervalues(existing_state)) - new_events = set(ev_id for ev_id in itervalues(current_state)) - changed_events = existing_events ^ new_events - - if not changed_events: - return - to_delete = { key: ev_id for key, ev_id in iteritems(existing_state) - if ev_id in changed_events + if ev_id != current_state.get(key) } - events_to_insert = (new_events - existing_events) + to_insert = { key: ev_id for key, ev_id in iteritems(current_state) - if ev_id in events_to_insert + if ev_id != existing_state.get(key) } defer.returnValue((to_delete, to_insert)) diff --git a/synapse/storage/push_rule.py b/synapse/storage/push_rule.py index af564b1b4e..6a5028961d 100644 --- a/synapse/storage/push_rule.py +++ b/synapse/storage/push_rule.py @@ -21,7 +21,6 @@ from canonicaljson import json from twisted.internet import defer -from synapse.api.constants import EventTypes from synapse.push.baserules import list_with_base_rules from synapse.storage.appservice import ApplicationServiceWorkerStore from synapse.storage.pusher import PusherWorkerStore @@ -250,18 +249,6 @@ class PushRulesWorkerStore(ApplicationServiceWorkerStore, if uid in local_users_in_room: user_ids.add(uid) - forgotten = yield self.who_forgot_in_room( - event.room_id, on_invalidate=cache_context.invalidate, - ) - - for row in forgotten: - user_id = row["user_id"] - event_id = row["event_id"] - - mem_id = current_state_ids.get((EventTypes.Member, user_id), None) - if event_id == mem_id: - user_ids.discard(user_id) - rules_by_user = yield self.bulk_get_push_rules( user_ids, on_invalidate=cache_context.invalidate, ) diff --git a/synapse/storage/pusher.py b/synapse/storage/pusher.py index cc273a57b2..8443bd4c1b 100644 --- a/synapse/storage/pusher.py +++ b/synapse/storage/pusher.py @@ -233,7 +233,7 @@ class PusherStore(PusherWorkerStore): ) if newly_inserted: - self.runInteraction( + yield self.runInteraction( "add_pusher", self._invalidate_cache_and_stream, self.get_if_user_has_pusher, (user_id,) diff --git a/synapse/storage/roommember.py b/synapse/storage/roommember.py index a27702a7a0..01697ab2c9 100644 --- a/synapse/storage/roommember.py +++ b/synapse/storage/roommember.py @@ -461,18 +461,6 @@ class RoomMemberWorkerStore(EventsWorkerStore): def _get_joined_hosts_cache(self, room_id): return _JoinedHostsCache(self, room_id) - @cached() - def who_forgot_in_room(self, room_id): - return self._simple_select_list( - table="room_memberships", - retcols=("user_id", "event_id"), - keyvalues={ - "room_id": room_id, - "forgotten": 1, - }, - desc="who_forgot" - ) - class RoomMemberStore(RoomMemberWorkerStore): def __init__(self, db_conn, hs): @@ -581,9 +569,6 @@ class RoomMemberStore(RoomMemberWorkerStore): txn.execute(sql, (user_id, room_id)) txn.call_after(self.did_forget.invalidate, (user_id, room_id)) - self._invalidate_cache_and_stream( - txn, self.who_forgot_in_room, (room_id,) - ) return self.runInteraction("forget_membership", f) @cachedInlineCallbacks(num_args=2) diff --git a/synapse/visibility.py b/synapse/visibility.py index ba0499a022..d4680863d3 100644 --- a/synapse/visibility.py +++ b/synapse/visibility.py @@ -24,7 +24,6 @@ from twisted.internet import defer from synapse.api.constants import EventTypes, Membership from synapse.events.utils import prune_event from synapse.types import get_domain_from_id -from synapse.util.logcontext import make_deferred_yieldable, preserve_fn logger = logging.getLogger(__name__) @@ -76,19 +75,6 @@ def filter_events_for_client(store, user_id, events, is_peeking=False, types=types, ) - forgotten = yield make_deferred_yieldable(defer.gatherResults([ - defer.maybeDeferred( - preserve_fn(store.who_forgot_in_room), - room_id, - ) - for room_id in frozenset(e.room_id for e in events) - ], consumeErrors=True)) - - # Set of membership event_ids that have been forgotten - event_id_forgotten = frozenset( - row["event_id"] for rows in forgotten for row in rows - ) - ignore_dict_content = yield store.get_global_account_data_by_type_for_user( "m.ignored_user_list", user_id, ) @@ -177,10 +163,7 @@ def filter_events_for_client(store, user_id, events, is_peeking=False, if membership is None: membership_event = state.get((EventTypes.Member, user_id), None) if membership_event: - # XXX why do we do this? - # https://github.com/matrix-org/synapse/issues/3350 - if membership_event.event_id not in event_id_forgotten: - membership = membership_event.membership + membership = membership_event.membership # if the user was a member of the room at the time of the event, # they can see it. |