mirror of
https://git.anonymousland.org/anonymousland/synapse.git
synced 2024-12-30 03:26:11 -05:00
1cc77145d4
This requires the notifier to have knowledge of appservice listeners so it can do the regex checks on incoming invites to see if the state_key matches. It isn't enough to just rely on the room listeners and store.get_app_service_rooms as the room will initially not exist or won't be on the ASes radar due to having none of its users in the room.
385 lines
12 KiB
Python
385 lines
12 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014, 2015 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.util.logutils import log_function
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from synapse.util.logcontext import PreserveLoggingContext
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from synapse.util.async import run_on_reactor
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from synapse.types import StreamToken
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import logging
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logger = logging.getLogger(__name__)
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class _NotificationListener(object):
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""" This represents a single client connection to the events stream.
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The events stream handler will have yielded to the deferred, so to
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notify the handler it is sufficient to resolve the deferred.
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This listener will also keep track of which rooms it is listening in
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so that it can remove itself from the indexes in the Notifier class.
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"""
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def __init__(self, user, rooms, from_token, limit, timeout, deferred,
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appservice=None):
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self.user = user
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self.appservice = appservice
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self.from_token = from_token
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self.limit = limit
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self.timeout = timeout
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self.deferred = deferred
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self.rooms = rooms
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self.pending_notifications = []
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def notify(self, notifier, events, start_token, end_token):
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""" Inform whoever is listening about the new events. This will
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also remove this listener from all the indexes in the Notifier
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it knows about.
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"""
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result = (events, (start_token, end_token))
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try:
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self.deferred.callback(result)
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except defer.AlreadyCalledError:
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pass
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for room in self.rooms:
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lst = notifier.rooms_to_listeners.get(room, set())
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lst.discard(self)
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notifier.user_to_listeners.get(self.user, set()).discard(self)
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if self.appservice:
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notifier.appservice_to_listeners.get(
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self.appservice, set()
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).discard(self)
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class Notifier(object):
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""" This class is responsible for notifying any listeners when there are
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new events available for it.
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Primarily used from the /events stream.
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"""
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def __init__(self, hs):
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self.hs = hs
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self.rooms_to_listeners = {}
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self.user_to_listeners = {}
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self.appservice_to_listeners = {}
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self.event_sources = hs.get_event_sources()
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self.clock = hs.get_clock()
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hs.get_distributor().observe(
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"user_joined_room", self._user_joined_room
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)
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@log_function
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@defer.inlineCallbacks
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def on_new_room_event(self, event, extra_users=[]):
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""" Used by handlers to inform the notifier something has happened
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in the room, room event wise.
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This triggers the notifier to wake up any listeners that are
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listening to the room, and any listeners for the users in the
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`extra_users` param.
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"""
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yield run_on_reactor()
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# poke any interested application service.
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self.hs.get_handlers().appservice_handler.notify_interested_services(
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event
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)
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room_id = event.room_id
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room_source = self.event_sources.sources["room"]
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listeners = self.rooms_to_listeners.get(room_id, set()).copy()
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for user in extra_users:
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listeners |= self.user_to_listeners.get(user, set()).copy()
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for appservice in self.appservice_to_listeners:
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# TODO (kegan): Redundant appservice listener checks?
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# App services will already be in the rooms_to_listeners set, but
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# that isn't enough. They need to be checked here in order to
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# receive *invites* for users they are interested in. Does this
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# make the rooms_to_listeners check somewhat obselete?
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if appservice.is_interested(event):
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listeners |= self.appservice_to_listeners.get(
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appservice, set()
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).copy()
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logger.debug("on_new_room_event listeners %s", listeners)
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# TODO (erikj): Can we make this more efficient by hitting the
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# db once?
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@defer.inlineCallbacks
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def notify(listener):
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events, end_key = yield room_source.get_new_events_for_user(
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listener.user,
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listener.from_token.room_key,
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listener.limit,
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)
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if events:
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end_token = listener.from_token.copy_and_replace(
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"room_key", end_key
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)
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listener.notify(
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self, events, listener.from_token, end_token
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)
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def eb(failure):
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logger.exception("Failed to notify listener", failure)
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with PreserveLoggingContext():
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yield defer.DeferredList(
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[notify(l).addErrback(eb) for l in listeners],
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consumeErrors=True,
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)
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@defer.inlineCallbacks
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@log_function
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def on_new_user_event(self, users=[], rooms=[]):
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""" Used to inform listeners that something has happend
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presence/user event wise.
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Will wake up all listeners for the given users and rooms.
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"""
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yield run_on_reactor()
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# TODO(paul): This is horrible, having to manually list every event
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# source here individually
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presence_source = self.event_sources.sources["presence"]
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typing_source = self.event_sources.sources["typing"]
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listeners = set()
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for user in users:
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listeners |= self.user_to_listeners.get(user, set()).copy()
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for room in rooms:
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listeners |= self.rooms_to_listeners.get(room, set()).copy()
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@defer.inlineCallbacks
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def notify(listener):
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presence_events, presence_end_key = (
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yield presence_source.get_new_events_for_user(
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listener.user,
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listener.from_token.presence_key,
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listener.limit,
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)
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)
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typing_events, typing_end_key = (
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yield typing_source.get_new_events_for_user(
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listener.user,
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listener.from_token.typing_key,
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listener.limit,
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)
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)
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if presence_events or typing_events:
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end_token = listener.from_token.copy_and_replace(
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"presence_key", presence_end_key
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).copy_and_replace(
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"typing_key", typing_end_key
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)
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listener.notify(
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self,
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presence_events + typing_events,
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listener.from_token,
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end_token
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)
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def eb(failure):
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logger.error(
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"Failed to notify listener",
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exc_info=(
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failure.type,
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failure.value,
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failure.getTracebackObject())
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)
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with PreserveLoggingContext():
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yield defer.DeferredList(
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[notify(l).addErrback(eb) for l in listeners],
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consumeErrors=True,
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)
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@defer.inlineCallbacks
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def wait_for_events(self, user, rooms, filter, timeout, callback):
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"""Wait until the callback returns a non empty response or the
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timeout fires.
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"""
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deferred = defer.Deferred()
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from_token = StreamToken("s0", "0", "0")
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listener = [_NotificationListener(
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user=user,
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rooms=rooms,
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from_token=from_token,
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limit=1,
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timeout=timeout,
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deferred=deferred,
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)]
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if timeout:
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self._register_with_keys(listener[0])
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result = yield callback()
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if timeout:
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timed_out = [False]
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def _timeout_listener():
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timed_out[0] = True
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listener[0].notify(self, [], from_token, from_token)
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self.clock.call_later(timeout/1000., _timeout_listener)
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while not result and not timed_out[0]:
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yield deferred
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deferred = defer.Deferred()
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listener[0] = _NotificationListener(
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user=user,
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rooms=rooms,
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from_token=from_token,
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limit=1,
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timeout=timeout,
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deferred=deferred,
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)
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self._register_with_keys(listener[0])
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result = yield callback()
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defer.returnValue(result)
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def get_events_for(self, user, rooms, pagination_config, timeout):
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""" For the given user and rooms, return any new events for them. If
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there are no new events wait for up to `timeout` milliseconds for any
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new events to happen before returning.
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"""
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deferred = defer.Deferred()
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self._get_events(
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deferred, user, rooms, pagination_config.from_token,
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pagination_config.limit, timeout
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).addErrback(deferred.errback)
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return deferred
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@defer.inlineCallbacks
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def _get_events(self, deferred, user, rooms, from_token, limit, timeout):
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if not from_token:
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from_token = yield self.event_sources.get_current_token()
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appservice = yield self.hs.get_datastore().get_app_service_by_user_id(
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user.to_string()
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)
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listener = _NotificationListener(
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user,
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rooms,
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from_token,
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limit,
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timeout,
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deferred,
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appservice=appservice
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)
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def _timeout_listener():
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# TODO (erikj): We should probably set to_token to the current
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# max rather than reusing from_token.
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listener.notify(
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self,
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[],
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listener.from_token,
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listener.from_token,
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)
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if timeout:
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self._register_with_keys(listener)
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yield self._check_for_updates(listener)
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if not timeout:
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_timeout_listener()
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else:
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self.clock.call_later(timeout/1000.0, _timeout_listener)
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return
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@log_function
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def _register_with_keys(self, listener):
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for room in listener.rooms:
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s = self.rooms_to_listeners.setdefault(room, set())
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s.add(listener)
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self.user_to_listeners.setdefault(listener.user, set()).add(listener)
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if listener.appservice:
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self.appservice_to_listeners.setdefault(
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listener.appservice, set()
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).add(listener)
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@defer.inlineCallbacks
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@log_function
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def _check_for_updates(self, listener):
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# TODO (erikj): We need to think about limits across multiple sources
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events = []
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from_token = listener.from_token
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limit = listener.limit
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# TODO (erikj): DeferredList?
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for name, source in self.event_sources.sources.items():
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keyname = "%s_key" % name
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stuff, new_key = yield source.get_new_events_for_user(
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listener.user,
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getattr(from_token, keyname),
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limit,
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)
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events.extend(stuff)
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from_token = from_token.copy_and_replace(keyname, new_key)
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end_token = from_token
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if events:
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listener.notify(self, events, listener.from_token, end_token)
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defer.returnValue(listener)
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def _user_joined_room(self, user, room_id):
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new_listeners = self.user_to_listeners.get(user, set())
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listeners = self.rooms_to_listeners.setdefault(room_id, set())
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listeners |= new_listeners
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