# -*- coding: utf-8 -*- # Copyright 2015, 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.http.servlet import ( RestServlet, parse_string, parse_integer, parse_boolean ) from synapse.handlers.sync import SyncConfig from synapse.types import StreamToken from synapse.events.utils import ( serialize_event, format_event_for_client_v2_without_room_id, ) from synapse.api.filtering import FilterCollection, DEFAULT_FILTER_COLLECTION from synapse.api.errors import SynapseError from synapse.api.constants import PresenceState from ._base import client_v2_patterns import copy import itertools import logging import ujson as json logger = logging.getLogger(__name__) class SyncRestServlet(RestServlet): """ GET parameters:: timeout(int): How long to wait for new events in milliseconds. since(batch_token): Batch token when asking for incremental deltas. set_presence(str): What state the device presence should be set to. default is "online". filter(filter_id): A filter to apply to the events returned. Response JSON:: { "next_batch": // batch token for the next /sync "presence": // presence data for the user. "rooms": { "join": { // Joined rooms being updated. "${room_id}": { // Id of the room being updated "event_map": // Map of EventID -> event JSON. "timeline": { // The recent events in the room if gap is "true" "limited": // Was the per-room event limit exceeded? // otherwise the next events in the room. "events": [] // list of EventIDs in the "event_map". "prev_batch": // back token for getting previous events. } "state": {"events": []} // list of EventIDs updating the // current state to be what it should // be at the end of the batch. "ephemeral": {"events": []} // list of event objects } }, "invite": {}, // Invited rooms being updated. "leave": {} // Archived rooms being updated. } } """ PATTERNS = client_v2_patterns("/sync$") ALLOWED_PRESENCE = set(["online", "offline"]) def __init__(self, hs): super(SyncRestServlet, self).__init__() self.auth = hs.get_auth() self.event_stream_handler = hs.get_handlers().event_stream_handler self.sync_handler = hs.get_handlers().sync_handler self.clock = hs.get_clock() self.filtering = hs.get_filtering() self.presence_handler = hs.get_presence_handler() @defer.inlineCallbacks def on_GET(self, request): if "from" in request.args: # /events used to use 'from', but /sync uses 'since'. # Lets be helpful and whine if we see a 'from'. raise SynapseError( 400, "'from' is not a valid query parameter. Did you mean 'since'?" ) requester = yield self.auth.get_user_by_req( request, allow_guest=True ) user = requester.user timeout = parse_integer(request, "timeout", default=0) since = parse_string(request, "since") set_presence = parse_string( request, "set_presence", default="online", allowed_values=self.ALLOWED_PRESENCE ) filter_id = parse_string(request, "filter", default=None) full_state = parse_boolean(request, "full_state", default=False) logger.info( "/sync: user=%r, timeout=%r, since=%r," " set_presence=%r, filter_id=%r" % ( user, timeout, since, set_presence, filter_id ) ) request_key = (user, timeout, since, filter_id, full_state) if filter_id: if filter_id.startswith('{'): try: filter_object = json.loads(filter_id) except: raise SynapseError(400, "Invalid filter JSON") self.filtering.check_valid_filter(filter_object) filter = FilterCollection(filter_object) else: filter = yield self.filtering.get_user_filter( user.localpart, filter_id ) else: filter = DEFAULT_FILTER_COLLECTION sync_config = SyncConfig( user=user, filter_collection=filter, is_guest=requester.is_guest, request_key=request_key, ) if since is not None: since_token = StreamToken.from_string(since) else: since_token = None affect_presence = set_presence != PresenceState.OFFLINE if affect_presence: yield self.presence_handler.set_state(user, {"presence": set_presence}) context = yield self.presence_handler.user_syncing( user.to_string(), affect_presence=affect_presence, ) with context: sync_result = yield self.sync_handler.wait_for_sync_for_user( sync_config, since_token=since_token, timeout=timeout, full_state=full_state ) time_now = self.clock.time_msec() joined = self.encode_joined( sync_result.joined, time_now, requester.access_token_id ) invited = self.encode_invited( sync_result.invited, time_now, requester.access_token_id ) archived = self.encode_archived( sync_result.archived, time_now, requester.access_token_id ) response_content = { "account_data": {"events": sync_result.account_data}, "presence": self.encode_presence( sync_result.presence, time_now ), "rooms": { "join": joined, "invite": invited, "leave": archived, }, "next_batch": sync_result.next_batch.to_string(), } defer.returnValue((200, response_content)) def encode_presence(self, events, time_now): formatted = [] for event in events: event = copy.deepcopy(event) event['sender'] = event['content'].pop('user_id') formatted.append(event) return {"events": formatted} def encode_joined(self, rooms, time_now, token_id): """ Encode the joined rooms in a sync result Args: rooms(list[synapse.handlers.sync.JoinedSyncResult]): list of sync results for rooms this user is joined to time_now(int): current time - used as a baseline for age calculations token_id(int): ID of the user's auth token - used for namespacing of transaction IDs Returns: dict[str, dict[str, object]]: the joined rooms list, in our response format """ joined = {} for room in rooms: joined[room.room_id] = self.encode_room( room, time_now, token_id ) return joined def encode_invited(self, rooms, time_now, token_id): """ Encode the invited rooms in a sync result Args: rooms(list[synapse.handlers.sync.InvitedSyncResult]): list of sync results for rooms this user is joined to time_now(int): current time - used as a baseline for age calculations token_id(int): ID of the user's auth token - used for namespacing of transaction IDs Returns: dict[str, dict[str, object]]: the invited rooms list, in our response format """ invited = {} for room in rooms: invite = serialize_event( room.invite, time_now, token_id=token_id, event_format=format_event_for_client_v2_without_room_id, ) unsigned = dict(invite.get("unsigned", {})) invite["unsigned"] = unsigned invited_state = list(unsigned.pop("invite_room_state", [])) invited_state.append(invite) invited[room.room_id] = { "invite_state": {"events": invited_state} } return invited def encode_archived(self, rooms, time_now, token_id): """ Encode the archived rooms in a sync result Args: rooms (list[synapse.handlers.sync.ArchivedSyncResult]): list of sync results for rooms this user is joined to time_now(int): current time - used as a baseline for age calculations token_id(int): ID of the user's auth token - used for namespacing of transaction IDs Returns: dict[str, dict[str, object]]: The invited rooms list, in our response format """ joined = {} for room in rooms: joined[room.room_id] = self.encode_room( room, time_now, token_id, joined=False ) return joined @staticmethod def encode_room(room, time_now, token_id, joined=True): """ Args: room (JoinedSyncResult|ArchivedSyncResult): sync result for a single room time_now (int): current time - used as a baseline for age calculations token_id (int): ID of the user's auth token - used for namespacing of transaction IDs joined (bool): True if the user is joined to this room - will mean we handle ephemeral events Returns: dict[str, object]: the room, encoded in our response format """ def serialize(event): # TODO(mjark): Respect formatting requirements in the filter. return serialize_event( event, time_now, token_id=token_id, event_format=format_event_for_client_v2_without_room_id, ) state_dict = room.state timeline_events = room.timeline.events state_events = state_dict.values() for event in itertools.chain(state_events, timeline_events): # We've had bug reports that events were coming down under the # wrong room. if event.room_id != room.room_id: logger.warn( "Event %r is under room %r instead of %r", event.event_id, room.room_id, event.room_id, ) serialized_state = [serialize(e) for e in state_events] serialized_timeline = [serialize(e) for e in timeline_events] account_data = room.account_data result = { "timeline": { "events": serialized_timeline, "prev_batch": room.timeline.prev_batch.to_string(), "limited": room.timeline.limited, }, "state": {"events": serialized_state}, "account_data": {"events": account_data}, } if joined: ephemeral_events = room.ephemeral result["ephemeral"] = {"events": ephemeral_events} result["unread_notifications"] = room.unread_notifications return result def register_servlets(hs, http_server): SyncRestServlet(hs).register(http_server)