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# -*- coding: utf-8 -*-
# Copyright 2015 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
)
from synapse.handlers.sync import SyncConfig
from synapse.types import StreamToken
from synapse.events.utils import (
serialize_event, format_event_for_client_v2_without_event_id,
)
from synapse.api.filtering import Filter
from ._base import client_v2_pattern
import copy
import logging
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": {
"joined": { // Joined rooms being updated.
"${room_id}": { // Id of the room being updated
"event_map": // Map of EventID -> event JSON.
"timeline": { // The recent events in the room if gap is "true"
"limited": // Was the per-room event limit exceeded?
// otherwise the next events in the room.
"events": [] // list of EventIDs in the "event_map".
"prev_batch": // back token for getting previous events.
}
"state": {"events": []} // list of EventIDs updating the
// current state to be what it should
// be at the end of the batch.
"ephemeral": {"events": []} // list of event objects
}
},
"invited": {}, // Invited rooms being updated.
"archived": {} // Archived rooms being updated.
}
}
"""
PATTERN = client_v2_pattern("/sync$")
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()
@defer.inlineCallbacks
def on_GET(self, request):
user, token_id = yield self.auth.get_user_by_req(request)
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)
logger.info(
"/sync: user=%r, timeout=%r, since=%r,"
" set_presence=%r, filter_id=%r" % (
user, timeout, since, set_presence, filter_id
)
)
try:
filter = yield self.filtering.get_user_filter(
user.localpart, filter_id
)
except:
filter = Filter({})
sync_config = SyncConfig(
user=user,
filter=filter,
)
if since is not None:
since_token = StreamToken.from_string(since)
else:
since_token = None
if set_presence == "online":
yield self.event_stream_handler.started_stream(user)
try:
sync_result = yield self.sync_handler.wait_for_sync_for_user(
sync_config, since_token=since_token, timeout=timeout
)
finally:
if set_presence == "online":
self.event_stream_handler.stopped_stream(user)
time_now = self.clock.time_msec()
rooms = self.encode_rooms(
sync_result.rooms, filter, time_now, token_id
)
response_content = {
"presence": self.encode_presence(
sync_result.presence, filter, time_now
),
"rooms": rooms,
"next_batch": sync_result.next_batch.to_string(),
}
defer.returnValue((200, response_content))
def encode_presence(self, events, filter, time_now):
formatted = []
for event in events:
event = copy.deepcopy(event)
event['sender'] = event['content'].pop('user_id')
formatted.append(event)
return {"events": filter.filter_presence(formatted)}
def encode_rooms(self, rooms, filter, time_now, token_id):
joined = {}
for room in rooms:
joined[room.room_id] = self.encode_room(
room, filter, time_now, token_id
)
return {
"joined": joined,
"invited": {},
"archived": {},
}
@staticmethod
def encode_room(room, filter, time_now, token_id):
event_map = {}
state_events = filter.filter_room_state(room.state)
timeline_events = filter.filter_room_timeline(room.timeline.events)
ephemeral_events = filter.filter_room_ephemeral(room.ephemeral)
state_event_ids = []
timeline_event_ids = []
for event in state_events:
# TODO(mjark): Respect formatting requirements in the filter.
event_map[event.event_id] = serialize_event(
event, time_now, token_id=token_id,
event_format=format_event_for_client_v2_without_event_id,
)
state_event_ids.append(event.event_id)
for event in timeline_events:
# TODO(mjark): Respect formatting requirements in the filter.
event_map[event.event_id] = serialize_event(
event, time_now, token_id=token_id,
event_format=format_event_for_client_v2_without_event_id,
)
timeline_event_ids.append(event.event_id)
result = {
"event_map": event_map,
"timeline": {
"events": timeline_event_ids,
"prev_batch": room.timeline.prev_batch.to_string(),
"limited": room.timeline.limited,
},
"state": {"events": state_event_ids},
"ephemeral": {"events": ephemeral_events},
}
return result
def register_servlets(hs, http_server):
SyncRestServlet(hs).register(http_server)
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