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![Mark Haines](/assets/img/avatar_default.png)
Access it directly from the homeserver itself. It already wasn't inheriting from BaseHandler storing it on the Handlers object was already somewhat dubious.
191 lines
6.8 KiB
Python
191 lines
6.8 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.api.constants import EventTypes
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from synapse.appservice import ApplicationService
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import logging
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logger = logging.getLogger(__name__)
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def log_failure(failure):
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logger.error(
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"Application Services Failure",
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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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)
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class ApplicationServicesHandler(object):
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def __init__(self, hs):
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self.store = hs.get_datastore()
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self.is_mine_id = hs.is_mine_id
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self.appservice_api = hs.get_application_service_api()
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self.scheduler = hs.get_application_service_scheduler()
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self.started_scheduler = False
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@defer.inlineCallbacks
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def notify_interested_services(self, event):
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"""Notifies (pushes) all application services interested in this event.
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Pushing is done asynchronously, so this method won't block for any
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prolonged length of time.
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Args:
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event(Event): The event to push out to interested services.
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"""
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# Gather interested services
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services = yield self._get_services_for_event(event)
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if len(services) == 0:
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return # no services need notifying
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# Do we know this user exists? If not, poke the user query API for
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# all services which match that user regex. This needs to block as these
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# user queries need to be made BEFORE pushing the event.
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yield self._check_user_exists(event.sender)
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if event.type == EventTypes.Member:
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yield self._check_user_exists(event.state_key)
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if not self.started_scheduler:
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self.scheduler.start().addErrback(log_failure)
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self.started_scheduler = True
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# Fork off pushes to these services
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for service in services:
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self.scheduler.submit_event_for_as(service, event)
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@defer.inlineCallbacks
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def query_user_exists(self, user_id):
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"""Check if any application service knows this user_id exists.
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Args:
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user_id(str): The user to query if they exist on any AS.
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Returns:
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True if this user exists on at least one application service.
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"""
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user_query_services = yield self._get_services_for_user(
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user_id=user_id
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)
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for user_service in user_query_services:
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is_known_user = yield self.appservice_api.query_user(
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user_service, user_id
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)
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if is_known_user:
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defer.returnValue(True)
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defer.returnValue(False)
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@defer.inlineCallbacks
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def query_room_alias_exists(self, room_alias):
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"""Check if an application service knows this room alias exists.
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Args:
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room_alias(RoomAlias): The room alias to query.
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Returns:
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namedtuple: with keys "room_id" and "servers" or None if no
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association can be found.
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"""
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room_alias_str = room_alias.to_string()
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alias_query_services = yield self._get_services_for_event(
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event=None,
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restrict_to=ApplicationService.NS_ALIASES,
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alias_list=[room_alias_str]
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)
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for alias_service in alias_query_services:
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is_known_alias = yield self.appservice_api.query_alias(
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alias_service, room_alias_str
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)
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if is_known_alias:
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# the alias exists now so don't query more ASes.
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result = yield self.store.get_association_from_room_alias(
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room_alias
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)
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defer.returnValue(result)
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@defer.inlineCallbacks
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def _get_services_for_event(self, event, restrict_to="", alias_list=None):
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"""Retrieve a list of application services interested in this event.
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Args:
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event(Event): The event to check. Can be None if alias_list is not.
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restrict_to(str): The namespace to restrict regex tests to.
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alias_list: A list of aliases to get services for. If None, this
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list is obtained from the database.
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Returns:
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list<ApplicationService>: A list of services interested in this
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event based on the service regex.
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"""
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member_list = None
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if hasattr(event, "room_id"):
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# We need to know the aliases associated with this event.room_id,
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# if any.
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if not alias_list:
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alias_list = yield self.store.get_aliases_for_room(
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event.room_id
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)
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# We need to know the members associated with this event.room_id,
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# if any.
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member_list = yield self.store.get_users_in_room(event.room_id)
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services = yield self.store.get_app_services()
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interested_list = [
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s for s in services if (
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s.is_interested(event, restrict_to, alias_list, member_list)
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)
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]
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defer.returnValue(interested_list)
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@defer.inlineCallbacks
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def _get_services_for_user(self, user_id):
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services = yield self.store.get_app_services()
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interested_list = [
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s for s in services if (
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s.is_interested_in_user(user_id)
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)
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]
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defer.returnValue(interested_list)
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@defer.inlineCallbacks
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def _is_unknown_user(self, user_id):
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if not self.is_mine_id(user_id):
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# we don't know if they are unknown or not since it isn't one of our
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# users. We can't poke ASes.
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defer.returnValue(False)
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return
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user_info = yield self.store.get_user_by_id(user_id)
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if user_info:
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defer.returnValue(False)
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return
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# user not found; could be the AS though, so check.
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services = yield self.store.get_app_services()
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service_list = [s for s in services if s.sender == user_id]
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defer.returnValue(len(service_list) == 0)
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@defer.inlineCallbacks
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def _check_user_exists(self, user_id):
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unknown_user = yield self._is_unknown_user(user_id)
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if unknown_user:
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exists = yield self.query_user_exists(user_id)
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defer.returnValue(exists)
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defer.returnValue(True)
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