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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, 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_event_id,
)
from synapse.api.filtering import Filter
from ._base import client_v2_pattern
import logging
logger = logging.getLogger(__name__)
class SyncRestServlet(RestServlet):
"""
GET parameters::
timeout(int): How long to wait for new events in milliseconds.
limit(int): Maxiumum number of events per room to return.
gap(bool): Create gaps the message history if limit is exceeded to
ensure that the client has the most recent messages. Defaults to
"true".
sort(str,str): tuple of sort key (e.g. "timeline") and direction
(e.g. "asc", "desc"). Defaults to "timeline,asc".
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".
backfill(bool): Should the HS request message history from other
servers. This may take a long time making it unsuitable for clients
expecting a prompt response. Defaults to "true".
filter(filter_id): A filter to apply to the events returned.
filter_*: Filter override parameters.
Response JSON::
{
"next_batch": // batch token for the next /sync
"private_user_data": // private events for this user.
"public_user_data": // public events for all users including the
// public events for this user.
"rooms": [{ // List of rooms with updates.
"room_id": // Id of the room being updated
"limited": // Was the per-room event limit exceeded?
"published": // Is the room published by our HS?
"event_map": // Map of EventID -> event JSON.
"events": { // The recent events in the room if gap is "true"
// otherwise the next events in the room.
"batch": [] // list of EventIDs in the "event_map".
"prev_batch": // back token for getting previous events.
}
"state": [] // list of EventIDs updating the current state to
// be what it should be at the end of the batch.
"ephemeral": []
}]
}
"""
PATTERN = client_v2_pattern("/sync$")
ALLOWED_SORT = set(["timeline,asc", "timeline,desc"])
ALLOWED_PRESENCE = set(["online", "offline", "idle"])
def __init__(self, hs):
super(SyncRestServlet, self).__init__()
self.auth = hs.get_auth()
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, _ = yield self.auth.get_user_by_req(request)
timeout = parse_integer(request, "timeout", default=0)
limit = parse_integer(request, "limit", required=True)
gap = parse_boolean(request, "gap", default=True)
sort = parse_string(
request, "sort", default="timeline,asc",
allowed_values=self.ALLOWED_SORT
)
since = parse_string(request, "since")
set_presence = parse_string(
request, "set_presence", default="online",
allowed_values=self.ALLOWED_PRESENCE
)
backfill = parse_boolean(request, "backfill", default=False)
filter_id = parse_string(request, "filter", default=None)
logger.info(
"/sync: user=%r, timeout=%r, limit=%r, gap=%r, sort=%r, since=%r,"
" set_presence=%r, backfill=%r, filter_id=%r" % (
user, timeout, limit, gap, sort, since, set_presence,
backfill, filter_id
)
)
# TODO(mjark): Load filter and apply overrides.
try:
filter = yield self.filtering.get_user_filter(
user.localpart, filter_id
)
except:
filter = Filter({})
# filter = filter.apply_overrides(http_request)
# if filter.matches(event):
# # stuff
sync_config = SyncConfig(
user=user,
client_info=client,
gap=gap,
limit=limit,
sort=sort,
backfill=backfill,
filter=filter,
)
if since is not None:
since_token = StreamToken.from_string(since)
else:
since_token = None
sync_result = yield self.sync_handler.wait_for_sync_for_user(
sync_config, since_token=since_token, timeout=timeout
)
time_now = self.clock.time_msec()
response_content = {
"public_user_data": self.encode_user_data(
sync_result.public_user_data, filter, time_now
),
"private_user_data": self.encode_user_data(
sync_result.private_user_data, filter, time_now
),
"rooms": self.encode_rooms(
sync_result.rooms, filter, time_now, client.token_id
),
"next_batch": sync_result.next_batch.to_string(),
}
defer.returnValue((200, response_content))
def encode_user_data(self, events, filter, time_now):
return events
def encode_rooms(self, rooms, filter, time_now, token_id):
return [
self.encode_room(room, filter, time_now, token_id)
for room in rooms
]
@staticmethod
def encode_room(room, filter, time_now, token_id):
event_map = {}
state_events = filter.filter_room_state(room.state)
recent_events = filter.filter_room_events(room.events)
state_event_ids = []
recent_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 recent_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,
)
recent_event_ids.append(event.event_id)
result = {
"room_id": room.room_id,
"event_map": event_map,
"events": {
"batch": recent_event_ids,
"prev_batch": room.prev_batch.to_string(),
},
"state": state_event_ids,
"limited": room.limited,
"published": room.published,
"ephemeral": room.ephemeral,
}
return result
def register_servlets(hs, http_server):
SyncRestServlet(hs).register(http_server)
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