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Diffstat (limited to 'synapse/handlers/initial_sync.py')
| -rw-r--r-- | synapse/handlers/initial_sync.py | 443 |
1 files changed, 443 insertions, 0 deletions
diff --git a/synapse/handlers/initial_sync.py b/synapse/handlers/initial_sync.py new file mode 100644 index 0000000000..fbfa5a0281 --- /dev/null +++ b/synapse/handlers/initial_sync.py @@ -0,0 +1,443 @@ +# -*- 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.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: + 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, + }) + + ret = { + "rooms": rooms_ret, + "presence": 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_handler = self.hs.get_handlers().receipts_handler + receipts = yield receipts_handler.get_receipts_for_room( + room_id, + now_token.receipt_key + ) + 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 + ) |