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Diffstat (limited to 'synapse/handlers/appservice.py')
| -rw-r--r-- | synapse/handlers/appservice.py | 211 |
1 files changed, 211 insertions, 0 deletions
diff --git a/synapse/handlers/appservice.py b/synapse/handlers/appservice.py new file mode 100644 index 0000000000..2c488a46f6 --- /dev/null +++ b/synapse/handlers/appservice.py @@ -0,0 +1,211 @@ +# -*- 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.api.constants import EventTypes, Membership +from synapse.api.errors import Codes, StoreError, SynapseError +from synapse.appservice import ApplicationService +from synapse.types import UserID +import synapse.util.stringutils as stringutils + +import logging + +logger = logging.getLogger(__name__) + + +# NB: Purposefully not inheriting BaseHandler since that contains way too much +# setup code which this handler does not need or use. This makes testing a lot +# easier. +class ApplicationServicesHandler(object): + + def __init__(self, hs, appservice_api): + self.store = hs.get_datastore() + self.hs = hs + self.appservice_api = appservice_api + + @defer.inlineCallbacks + def register(self, app_service): + logger.info("Register -> %s", app_service) + # check the token is recognised + try: + stored_service = yield self.store.get_app_service_by_token( + app_service.token + ) + if not stored_service: + raise StoreError(404, "Application service not found") + except StoreError: + raise SynapseError( + 403, "Unrecognised application services token. " + "Consult the home server admin.", + errcode=Codes.FORBIDDEN + ) + + app_service.hs_token = self._generate_hs_token() + + # create a sender for this application service which is used when + # creating rooms, etc.. + account = yield self.hs.get_handlers().registration_handler.register() + app_service.sender = account[0] + + yield self.store.update_app_service(app_service) + defer.returnValue(app_service) + + @defer.inlineCallbacks + def unregister(self, token): + logger.info("Unregister as_token=%s", token) + yield self.store.unregister_app_service(token) + + @defer.inlineCallbacks + def notify_interested_services(self, event): + """Notifies (pushes) all application services interested in this event. + + Pushing is done asynchronously, so this method won't block for any + prolonged length of time. + + Args: + event(Event): The event to push out to interested services. + """ + # Gather interested services + services = yield self._get_services_for_event(event) + if len(services) == 0: + return # no services need notifying + + # Do we know this user exists? If not, poke the user query API for + # all services which match that user regex. This needs to block as these + # user queries need to be made BEFORE pushing the event. + yield self._check_user_exists(event.sender) + if event.type == EventTypes.Member: + yield self._check_user_exists(event.state_key) + + # Fork off pushes to these services - XXX First cut, best effort + for service in services: + self.appservice_api.push(service, event) + + @defer.inlineCallbacks + def query_user_exists(self, user_id): + """Check if any application service knows this user_id exists. + + Args: + user_id(str): The user to query if they exist on any AS. + Returns: + True if this user exists on at least one application service. + """ + user_query_services = yield self._get_services_for_user( + user_id=user_id + ) + for user_service in user_query_services: + is_known_user = yield self.appservice_api.query_user( + user_service, user_id + ) + if is_known_user: + defer.returnValue(True) + defer.returnValue(False) + + @defer.inlineCallbacks + def query_room_alias_exists(self, room_alias): + """Check if an application service knows this room alias exists. + + Args: + room_alias(RoomAlias): The room alias to query. + Returns: + namedtuple: with keys "room_id" and "servers" or None if no + association can be found. + """ + room_alias_str = room_alias.to_string() + alias_query_services = yield self._get_services_for_event( + event=None, + restrict_to=ApplicationService.NS_ALIASES, + alias_list=[room_alias_str] + ) + for alias_service in alias_query_services: + is_known_alias = yield self.appservice_api.query_alias( + alias_service, room_alias_str + ) + if is_known_alias: + # the alias exists now so don't query more ASes. + result = yield self.store.get_association_from_room_alias( + room_alias + ) + defer.returnValue(result) + + @defer.inlineCallbacks + def _get_services_for_event(self, event, restrict_to="", alias_list=None): + """Retrieve a list of application services interested in this event. + + Args: + event(Event): The event to check. Can be None if alias_list is not. + restrict_to(str): The namespace to restrict regex tests to. + alias_list: A list of aliases to get services for. If None, this + list is obtained from the database. + Returns: + list<ApplicationService>: A list of services interested in this + event based on the service regex. + """ + member_list = None + if hasattr(event, "room_id"): + # We need to know the aliases associated with this event.room_id, + # if any. + if not alias_list: + alias_list = yield self.store.get_aliases_for_room( + event.room_id + ) + # We need to know the members associated with this event.room_id, + # if any. + member_list = yield self.store.get_room_members( + room_id=event.room_id, + membership=Membership.JOIN + ) + + services = yield self.store.get_app_services() + interested_list = [ + s for s in services if ( + s.is_interested(event, restrict_to, alias_list, member_list) + ) + ] + defer.returnValue(interested_list) + + @defer.inlineCallbacks + def _get_services_for_user(self, user_id): + services = yield self.store.get_app_services() + interested_list = [ + s for s in services if ( + s.is_interested_in_user(user_id) + ) + ] + defer.returnValue(interested_list) + + @defer.inlineCallbacks + def _is_unknown_user(self, user_id): + user = UserID.from_string(user_id) + if not self.hs.is_mine(user): + # we don't know if they are unknown or not since it isn't one of our + # users. We can't poke ASes. + defer.returnValue(False) + return + + user_info = yield self.store.get_user_by_id(user_id) + defer.returnValue(len(user_info) == 0) + + @defer.inlineCallbacks + def _check_user_exists(self, user_id): + unknown_user = yield self._is_unknown_user(user_id) + if unknown_user: + exists = yield self.query_user_exists(user_id) + defer.returnValue(exists) + defer.returnValue(True) + + def _generate_hs_token(self): + return stringutils.random_string(24) |