mirror of
https://git.anonymousland.org/anonymousland/synapse.git
synced 2024-12-21 06:14:18 -05:00
154 lines
5.2 KiB
Python
154 lines
5.2 KiB
Python
# -*- coding: utf-8 -*-
|
|
# Copyright 2014, 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.util.logcontext import PreserveLoggingContext
|
|
from synapse.util.logutils import log_function
|
|
from synapse.types import UserID
|
|
from synapse.events.utils import serialize_event
|
|
|
|
from ._base import BaseHandler
|
|
|
|
import logging
|
|
import random
|
|
|
|
|
|
logger = logging.getLogger(__name__)
|
|
|
|
|
|
class EventStreamHandler(BaseHandler):
|
|
|
|
def __init__(self, hs):
|
|
super(EventStreamHandler, self).__init__(hs)
|
|
|
|
# Count of active streams per user
|
|
self._streams_per_user = {}
|
|
# Grace timers per user to delay the "stopped" signal
|
|
self._stop_timer_per_user = {}
|
|
|
|
self.distributor = hs.get_distributor()
|
|
self.distributor.declare("started_user_eventstream")
|
|
self.distributor.declare("stopped_user_eventstream")
|
|
|
|
self.clock = hs.get_clock()
|
|
|
|
self.notifier = hs.get_notifier()
|
|
|
|
@defer.inlineCallbacks
|
|
@log_function
|
|
def get_stream(self, auth_user_id, pagin_config, timeout=0,
|
|
as_client_event=True, affect_presence=True):
|
|
auth_user = UserID.from_string(auth_user_id)
|
|
|
|
try:
|
|
if affect_presence:
|
|
if auth_user not in self._streams_per_user:
|
|
self._streams_per_user[auth_user] = 0
|
|
if auth_user in self._stop_timer_per_user:
|
|
try:
|
|
self.clock.cancel_call_later(
|
|
self._stop_timer_per_user.pop(auth_user)
|
|
)
|
|
except:
|
|
logger.exception("Failed to cancel event timer")
|
|
else:
|
|
yield self.distributor.fire(
|
|
"started_user_eventstream", auth_user
|
|
)
|
|
self._streams_per_user[auth_user] += 1
|
|
|
|
rm_handler = self.hs.get_handlers().room_member_handler
|
|
room_ids = yield rm_handler.get_joined_rooms_for_user(auth_user)
|
|
|
|
if timeout:
|
|
# If they've set a timeout set a minimum limit.
|
|
timeout = max(timeout, 500)
|
|
|
|
# Add some randomness to this value to try and mitigate against
|
|
# thundering herds on restart.
|
|
timeout = random.randint(int(timeout*0.9), int(timeout*1.1))
|
|
|
|
with PreserveLoggingContext():
|
|
events, tokens = yield self.notifier.get_events_for(
|
|
auth_user, room_ids, pagin_config, timeout
|
|
)
|
|
|
|
time_now = self.clock.time_msec()
|
|
|
|
chunks = [
|
|
serialize_event(e, time_now, as_client_event) for e in events
|
|
]
|
|
|
|
chunk = {
|
|
"chunk": chunks,
|
|
"start": tokens[0].to_string(),
|
|
"end": tokens[1].to_string(),
|
|
}
|
|
|
|
defer.returnValue(chunk)
|
|
|
|
finally:
|
|
if affect_presence:
|
|
self._streams_per_user[auth_user] -= 1
|
|
if not self._streams_per_user[auth_user]:
|
|
del self._streams_per_user[auth_user]
|
|
|
|
# 10 seconds of grace to allow the client to reconnect again
|
|
# before we think they're gone
|
|
def _later():
|
|
logger.debug(
|
|
"_later stopped_user_eventstream %s", auth_user
|
|
)
|
|
|
|
self._stop_timer_per_user.pop(auth_user, None)
|
|
|
|
return self.distributor.fire(
|
|
"stopped_user_eventstream", auth_user
|
|
)
|
|
|
|
logger.debug("Scheduling _later: for %s", auth_user)
|
|
self._stop_timer_per_user[auth_user] = (
|
|
self.clock.call_later(30, _later)
|
|
)
|
|
|
|
|
|
class EventHandler(BaseHandler):
|
|
|
|
@defer.inlineCallbacks
|
|
def get_event(self, user, event_id):
|
|
"""Retrieve a single specified event.
|
|
|
|
Args:
|
|
user (synapse.types.UserID): The user requesting the event
|
|
event_id (str): The event ID to obtain.
|
|
Returns:
|
|
dict: An event, or None if there is no event matching this ID.
|
|
Raises:
|
|
SynapseError if there was a problem retrieving this event, or
|
|
AuthError if the user does not have the rights to inspect this
|
|
event.
|
|
"""
|
|
event = yield self.store.get_event(event_id)
|
|
|
|
if not event:
|
|
defer.returnValue(None)
|
|
return
|
|
|
|
if hasattr(event, "room_id"):
|
|
yield self.auth.check_joined_room(event.room_id, user.to_string())
|
|
|
|
defer.returnValue(event)
|