342 lines
12 KiB
Python
342 lines
12 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2015, 2016 OpenMarket Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from twisted.internet import defer
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from synapse.http.servlet import (
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RestServlet, parse_string, parse_integer, parse_boolean
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)
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from synapse.handlers.sync import SyncConfig
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from synapse.types import StreamToken
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from synapse.events.utils import (
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serialize_event, format_event_for_client_v2_without_room_id,
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)
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from synapse.api.filtering import FilterCollection, DEFAULT_FILTER_COLLECTION
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from synapse.api.errors import SynapseError
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from synapse.api.constants import PresenceState
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from ._base import client_v2_patterns
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import copy
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import itertools
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import logging
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import ujson as json
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logger = logging.getLogger(__name__)
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class SyncRestServlet(RestServlet):
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"""
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GET parameters::
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timeout(int): How long to wait for new events in milliseconds.
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since(batch_token): Batch token when asking for incremental deltas.
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set_presence(str): What state the device presence should be set to.
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default is "online".
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filter(filter_id): A filter to apply to the events returned.
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Response JSON::
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{
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"next_batch": // batch token for the next /sync
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"presence": // presence data for the user.
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"rooms": {
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"join": { // Joined rooms being updated.
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"${room_id}": { // Id of the room being updated
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"event_map": // Map of EventID -> event JSON.
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"timeline": { // The recent events in the room if gap is "true"
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"limited": // Was the per-room event limit exceeded?
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// otherwise the next events in the room.
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"events": [] // list of EventIDs in the "event_map".
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"prev_batch": // back token for getting previous events.
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}
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"state": {"events": []} // list of EventIDs updating the
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// current state to be what it should
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// be at the end of the batch.
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"ephemeral": {"events": []} // list of event objects
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}
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},
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"invite": {}, // Invited rooms being updated.
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"leave": {} // Archived rooms being updated.
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}
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}
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"""
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PATTERNS = client_v2_patterns("/sync$")
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ALLOWED_PRESENCE = set(["online", "offline"])
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def __init__(self, hs):
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super(SyncRestServlet, self).__init__()
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self.auth = hs.get_auth()
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self.sync_handler = hs.get_sync_handler()
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self.clock = hs.get_clock()
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self.filtering = hs.get_filtering()
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self.presence_handler = hs.get_presence_handler()
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@defer.inlineCallbacks
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def on_GET(self, request):
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if "from" in request.args:
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# /events used to use 'from', but /sync uses 'since'.
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# Lets be helpful and whine if we see a 'from'.
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raise SynapseError(
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400, "'from' is not a valid query parameter. Did you mean 'since'?"
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)
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requester = yield self.auth.get_user_by_req(
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request, allow_guest=True
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)
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user = requester.user
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device_id = requester.device_id
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timeout = parse_integer(request, "timeout", default=0)
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since = parse_string(request, "since")
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set_presence = parse_string(
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request, "set_presence", default="online",
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allowed_values=self.ALLOWED_PRESENCE
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)
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filter_id = parse_string(request, "filter", default=None)
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full_state = parse_boolean(request, "full_state", default=False)
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logger.info(
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"/sync: user=%r, timeout=%r, since=%r,"
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" set_presence=%r, filter_id=%r, device_id=%r" % (
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user, timeout, since, set_presence, filter_id, device_id
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)
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)
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request_key = (user, timeout, since, filter_id, full_state, device_id)
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if filter_id:
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if filter_id.startswith('{'):
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try:
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filter_object = json.loads(filter_id)
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except:
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raise SynapseError(400, "Invalid filter JSON")
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self.filtering.check_valid_filter(filter_object)
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filter = FilterCollection(filter_object)
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else:
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filter = yield self.filtering.get_user_filter(
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user.localpart, filter_id
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)
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else:
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filter = DEFAULT_FILTER_COLLECTION
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sync_config = SyncConfig(
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user=user,
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filter_collection=filter,
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is_guest=requester.is_guest,
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request_key=request_key,
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device_id=device_id,
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)
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if since is not None:
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since_token = StreamToken.from_string(since)
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else:
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since_token = None
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affect_presence = set_presence != PresenceState.OFFLINE
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if affect_presence:
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yield self.presence_handler.set_state(user, {"presence": set_presence}, True)
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context = yield self.presence_handler.user_syncing(
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user.to_string(), affect_presence=affect_presence,
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)
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with context:
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sync_result = yield self.sync_handler.wait_for_sync_for_user(
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sync_config, since_token=since_token, timeout=timeout,
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full_state=full_state
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)
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time_now = self.clock.time_msec()
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joined = self.encode_joined(
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sync_result.joined, time_now, requester.access_token_id
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)
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invited = self.encode_invited(
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sync_result.invited, time_now, requester.access_token_id
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)
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archived = self.encode_archived(
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sync_result.archived, time_now, requester.access_token_id
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)
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response_content = {
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"account_data": {"events": sync_result.account_data},
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"to_device": {"events": sync_result.to_device},
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"presence": self.encode_presence(
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sync_result.presence, time_now
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),
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"rooms": {
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"join": joined,
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"invite": invited,
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"leave": archived,
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},
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"next_batch": sync_result.next_batch.to_string(),
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}
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defer.returnValue((200, response_content))
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def encode_presence(self, events, time_now):
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formatted = []
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for event in events:
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event = copy.deepcopy(event)
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event['sender'] = event['content'].pop('user_id')
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formatted.append(event)
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return {"events": formatted}
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def encode_joined(self, rooms, time_now, token_id):
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"""
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Encode the joined rooms in a sync result
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Args:
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rooms(list[synapse.handlers.sync.JoinedSyncResult]): list of sync
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results for rooms this user is joined to
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time_now(int): current time - used as a baseline for age
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calculations
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token_id(int): ID of the user's auth token - used for namespacing
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of transaction IDs
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Returns:
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dict[str, dict[str, object]]: the joined rooms list, in our
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response format
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"""
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joined = {}
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for room in rooms:
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joined[room.room_id] = self.encode_room(
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room, time_now, token_id
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)
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return joined
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def encode_invited(self, rooms, time_now, token_id):
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"""
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Encode the invited rooms in a sync result
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Args:
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rooms(list[synapse.handlers.sync.InvitedSyncResult]): list of
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sync results for rooms this user is joined to
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time_now(int): current time - used as a baseline for age
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calculations
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token_id(int): ID of the user's auth token - used for namespacing
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of transaction IDs
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Returns:
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dict[str, dict[str, object]]: the invited rooms list, in our
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response format
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"""
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invited = {}
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for room in rooms:
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invite = serialize_event(
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room.invite, time_now, token_id=token_id,
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event_format=format_event_for_client_v2_without_room_id,
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)
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unsigned = dict(invite.get("unsigned", {}))
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invite["unsigned"] = unsigned
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invited_state = list(unsigned.pop("invite_room_state", []))
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invited_state.append(invite)
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invited[room.room_id] = {
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"invite_state": {"events": invited_state}
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}
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return invited
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def encode_archived(self, rooms, time_now, token_id):
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"""
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Encode the archived rooms in a sync result
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Args:
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rooms (list[synapse.handlers.sync.ArchivedSyncResult]): list of
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sync results for rooms this user is joined to
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time_now(int): current time - used as a baseline for age
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calculations
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token_id(int): ID of the user's auth token - used for namespacing
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of transaction IDs
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Returns:
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dict[str, dict[str, object]]: The invited rooms list, in our
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response format
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"""
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joined = {}
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for room in rooms:
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joined[room.room_id] = self.encode_room(
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room, time_now, token_id, joined=False
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)
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return joined
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@staticmethod
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def encode_room(room, time_now, token_id, joined=True):
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"""
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Args:
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room (JoinedSyncResult|ArchivedSyncResult): sync result for a
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single room
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time_now (int): current time - used as a baseline for age
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calculations
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token_id (int): ID of the user's auth token - used for namespacing
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of transaction IDs
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joined (bool): True if the user is joined to this room - will mean
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we handle ephemeral events
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Returns:
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dict[str, object]: the room, encoded in our response format
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"""
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def serialize(event):
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# TODO(mjark): Respect formatting requirements in the filter.
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return serialize_event(
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event, time_now, token_id=token_id,
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event_format=format_event_for_client_v2_without_room_id,
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)
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state_dict = room.state
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timeline_events = room.timeline.events
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state_events = state_dict.values()
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for event in itertools.chain(state_events, timeline_events):
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# We've had bug reports that events were coming down under the
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# wrong room.
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if event.room_id != room.room_id:
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logger.warn(
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"Event %r is under room %r instead of %r",
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event.event_id, room.room_id, event.room_id,
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)
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serialized_state = [serialize(e) for e in state_events]
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serialized_timeline = [serialize(e) for e in timeline_events]
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account_data = room.account_data
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result = {
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"timeline": {
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"events": serialized_timeline,
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"prev_batch": room.timeline.prev_batch.to_string(),
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"limited": room.timeline.limited,
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},
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"state": {"events": serialized_state},
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"account_data": {"events": account_data},
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}
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if joined:
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ephemeral_events = room.ephemeral
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result["ephemeral"] = {"events": ephemeral_events}
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result["unread_notifications"] = room.unread_notifications
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return result
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def register_servlets(hs, http_server):
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SyncRestServlet(hs).register(http_server)
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