mirror of
https://git.anonymousland.org/anonymousland/synapse.git
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549 lines
20 KiB
Python
549 lines
20 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 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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import logging
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from simplejson import JSONDecodeError
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import simplejson as json
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from twisted.internet import defer
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from synapse.api.constants import Membership
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from synapse.api.errors import StoreError
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from synapse.appservice import ApplicationService, AppServiceTransaction
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from synapse.storage.roommember import RoomsForUser
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from ._base import SQLBaseStore
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logger = logging.getLogger(__name__)
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def log_failure(failure):
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logger.error("Failed to detect application services: %s", failure.value)
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logger.error(failure.getTraceback())
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class ApplicationServiceStore(SQLBaseStore):
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def __init__(self, hs):
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super(ApplicationServiceStore, self).__init__(hs)
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self.services_cache = []
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self.cache_defer = self._populate_appservice_cache()
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self.cache_defer.addErrback(log_failure)
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@defer.inlineCallbacks
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def unregister_app_service(self, token):
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"""Unregisters this service.
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This removes all AS specific regex and the base URL. The token is the
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only thing preserved for future registration attempts.
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"""
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yield self.cache_defer # make sure the cache is ready
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yield self.runInteraction(
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"unregister_app_service",
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self._unregister_app_service_txn,
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token,
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)
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# update cache TODO: Should this be in the txn?
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for service in self.services_cache:
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if service.token == token:
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service.url = None
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service.namespaces = None
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service.hs_token = None
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def _unregister_app_service_txn(self, txn, token):
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# kill the url to prevent pushes
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txn.execute(
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"UPDATE application_services SET url=NULL WHERE token=?",
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(token,)
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)
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# cleanup regex
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as_id = self._get_as_id_txn(txn, token)
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if not as_id:
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logger.warning(
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"unregister_app_service_txn: Failed to find as_id for token=",
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token
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)
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return False
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txn.execute(
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"DELETE FROM application_services_regex WHERE as_id=?",
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(as_id,)
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)
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return True
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@defer.inlineCallbacks
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def update_app_service(self, service):
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"""Update an application service, clobbering what was previously there.
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Args:
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service(ApplicationService): The updated service.
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"""
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yield self.cache_defer # make sure the cache is ready
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# NB: There is no "insert" since we provide no public-facing API to
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# allocate new ASes. It relies on the server admin inserting the AS
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# token into the database manually.
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if not service.token or not service.url:
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raise StoreError(400, "Token and url must be specified.")
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if not service.hs_token:
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raise StoreError(500, "No HS token")
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as_id = yield self.runInteraction(
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"update_app_service",
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self._update_app_service_txn,
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service
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)
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service.id = as_id
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# update cache TODO: Should this be in the txn?
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for (index, cache_service) in enumerate(self.services_cache):
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if service.token == cache_service.token:
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self.services_cache[index] = service
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logger.info("Updated: %s", service)
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return
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# new entry
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self.services_cache.append(service)
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logger.info("Updated(new): %s", service)
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def _update_app_service_txn(self, txn, service):
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as_id = self._get_as_id_txn(txn, service.token)
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if not as_id:
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logger.warning(
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"update_app_service_txn: Failed to find as_id for token=",
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service.token
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)
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return
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txn.execute(
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"UPDATE application_services SET url=?, hs_token=?, sender=? "
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"WHERE id=?",
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(service.url, service.hs_token, service.sender, as_id,)
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)
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# cleanup regex
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txn.execute(
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"DELETE FROM application_services_regex WHERE as_id=?",
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(as_id,)
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)
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for (ns_int, ns_str) in enumerate(ApplicationService.NS_LIST):
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if ns_str in service.namespaces:
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for regex_obj in service.namespaces[ns_str]:
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txn.execute(
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"INSERT INTO application_services_regex("
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"as_id, namespace, regex) values(?,?,?)",
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(as_id, ns_int, json.dumps(regex_obj))
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)
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return as_id
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def _get_as_id_txn(self, txn, token):
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cursor = txn.execute(
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"SELECT id FROM application_services WHERE token=?",
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(token,)
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)
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res = cursor.fetchone()
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if res:
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return res[0]
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@defer.inlineCallbacks
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def get_app_services(self):
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yield self.cache_defer # make sure the cache is ready
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defer.returnValue(self.services_cache)
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@defer.inlineCallbacks
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def get_app_service_by_user_id(self, user_id):
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"""Retrieve an application service from their user ID.
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All application services have associated with them a particular user ID.
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There is no distinguishing feature on the user ID which indicates it
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represents an application service. This function allows you to map from
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a user ID to an application service.
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Args:
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user_id(str): The user ID to see if it is an application service.
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Returns:
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synapse.appservice.ApplicationService or None.
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"""
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yield self.cache_defer # make sure the cache is ready
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for service in self.services_cache:
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if service.sender == user_id:
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defer.returnValue(service)
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return
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defer.returnValue(None)
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@defer.inlineCallbacks
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def get_app_service_by_token(self, token, from_cache=True):
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"""Get the application service with the given appservice token.
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Args:
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token (str): The application service token.
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from_cache (bool): True to get this service from the cache, False to
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check the database.
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Raises:
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StoreError if there was a problem retrieving this service.
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"""
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yield self.cache_defer # make sure the cache is ready
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if from_cache:
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for service in self.services_cache:
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if service.token == token:
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defer.returnValue(service)
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return
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defer.returnValue(None)
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# TODO: The from_cache=False impl
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# TODO: This should be JOINed with the application_services_regex table.
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def get_app_service_rooms(self, service):
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"""Get a list of RoomsForUser for this application service.
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Application services may be "interested" in lots of rooms depending on
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the room ID, the room aliases, or the members in the room. This function
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takes all of these into account and returns a list of RoomsForUser which
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represent the entire list of room IDs that this application service
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wants to know about.
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Args:
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service: The application service to get a room list for.
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Returns:
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A list of RoomsForUser.
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"""
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return self.runInteraction(
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"get_app_service_rooms",
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self._get_app_service_rooms_txn,
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service,
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)
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def _get_app_service_rooms_txn(self, txn, service):
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# get all rooms matching the room ID regex.
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room_entries = self._simple_select_list_txn(
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txn=txn, table="rooms", keyvalues=None, retcols=["room_id"]
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)
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matching_room_list = set([
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r["room_id"] for r in room_entries if
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service.is_interested_in_room(r["room_id"])
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])
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# resolve room IDs for matching room alias regex.
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room_alias_mappings = self._simple_select_list_txn(
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txn=txn, table="room_aliases", keyvalues=None,
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retcols=["room_id", "room_alias"]
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)
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matching_room_list |= set([
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r["room_id"] for r in room_alias_mappings if
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service.is_interested_in_alias(r["room_alias"])
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])
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# get all rooms for every user for this AS. This is scoped to users on
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# this HS only.
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user_list = self._simple_select_list_txn(
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txn=txn, table="users", keyvalues=None, retcols=["name"]
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)
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user_list = [
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u["name"] for u in user_list if
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service.is_interested_in_user(u["name"])
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]
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rooms_for_user_matching_user_id = set() # RoomsForUser list
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for user_id in user_list:
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# FIXME: This assumes this store is linked with RoomMemberStore :(
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rooms_for_user = self._get_rooms_for_user_where_membership_is_txn(
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txn=txn,
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user_id=user_id,
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membership_list=[Membership.JOIN]
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)
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rooms_for_user_matching_user_id |= set(rooms_for_user)
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# make RoomsForUser tuples for room ids and aliases which are not in the
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# main rooms_for_user_list - e.g. they are rooms which do not have AS
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# registered users in it.
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known_room_ids = [r.room_id for r in rooms_for_user_matching_user_id]
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missing_rooms_for_user = [
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RoomsForUser(r, service.sender, "join") for r in
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matching_room_list if r not in known_room_ids
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]
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rooms_for_user_matching_user_id |= set(missing_rooms_for_user)
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return rooms_for_user_matching_user_id
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def _parse_services_dict(self, results):
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# SQL results in the form:
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# [
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# {
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# 'regex': "something",
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# 'url': "something",
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# 'namespace': enum,
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# 'as_id': 0,
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# 'token': "something",
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# 'hs_token': "otherthing",
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# 'id': 0
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# }
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# ]
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services = {}
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for res in results:
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as_token = res["token"]
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if as_token is None:
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continue
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if as_token not in services:
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# add the service
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services[as_token] = {
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"id": res["id"],
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"url": res["url"],
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"token": as_token,
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"hs_token": res["hs_token"],
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"sender": res["sender"],
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"namespaces": {
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ApplicationService.NS_USERS: [],
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ApplicationService.NS_ALIASES: [],
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ApplicationService.NS_ROOMS: []
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}
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}
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# add the namespace regex if one exists
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ns_int = res["namespace"]
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if ns_int is None:
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continue
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try:
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services[as_token]["namespaces"][
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ApplicationService.NS_LIST[ns_int]].append(
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json.loads(res["regex"])
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)
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except IndexError:
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logger.error("Bad namespace enum '%s'. %s", ns_int, res)
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except JSONDecodeError:
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logger.error("Bad regex object '%s'", res["regex"])
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service_list = []
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for service in services.values():
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service_list.append(ApplicationService(
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token=service["token"],
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url=service["url"],
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namespaces=service["namespaces"],
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hs_token=service["hs_token"],
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sender=service["sender"],
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id=service["id"]
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))
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return service_list
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@defer.inlineCallbacks
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def _populate_appservice_cache(self):
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"""Populates the ApplicationServiceCache from the database."""
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sql = ("SELECT r.*, a.* FROM application_services AS a LEFT JOIN "
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"application_services_regex AS r ON a.id = r.as_id")
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results = yield self._execute_and_decode("appservice_cache", sql)
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services = self._parse_services_dict(results)
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for service in services:
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logger.info("Found application service: %s", service)
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self.services_cache.append(service)
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class ApplicationServiceTransactionStore(SQLBaseStore):
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def __init__(self, hs):
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super(ApplicationServiceTransactionStore, self).__init__(hs)
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@defer.inlineCallbacks
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def get_appservices_by_state(self, state):
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"""Get a list of application services based on their state.
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Args:
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state(ApplicationServiceState): The state to filter on.
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Returns:
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A Deferred which resolves to a list of ApplicationServices, which
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may be empty.
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"""
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sql = (
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"SELECT r.*, a.* FROM application_services_state AS s LEFT JOIN"
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" application_services AS a ON a.id=s.as_id LEFT JOIN"
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" application_services_regex AS r ON r.as_id=a.id WHERE state = ?"
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)
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results = yield self._execute_and_decode(
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"get_appservices_by_state", sql, state
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)
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# NB: This assumes this class is linked with ApplicationServiceStore
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defer.returnValue(self._parse_services_dict(results))
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@defer.inlineCallbacks
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def get_appservice_state(self, service):
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"""Get the application service state.
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Args:
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service(ApplicationService): The service whose state to set.
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Returns:
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A Deferred which resolves to ApplicationServiceState.
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"""
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result = yield self._simple_select_one(
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"application_services_state",
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dict(as_id=service.id),
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["state"],
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allow_none=True
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)
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if result:
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defer.returnValue(result.get("state"))
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return
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defer.returnValue(None)
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def set_appservice_state(self, service, state):
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"""Set the application service state.
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Args:
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service(ApplicationService): The service whose state to set.
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state(ApplicationServiceState): The connectivity state to apply.
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Returns:
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A Deferred which resolves when the state was set successfully.
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"""
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return self._simple_upsert(
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"application_services_state",
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dict(as_id=service.id),
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dict(state=state)
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)
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def create_appservice_txn(self, service, events):
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"""Atomically creates a new transaction for this application service
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with the given list of events.
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Args:
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service(ApplicationService): The service who the transaction is for.
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events(list<Event>): A list of events to put in the transaction.
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Returns:
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AppServiceTransaction: A new transaction.
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"""
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return self.runInteraction(
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"create_appservice_txn",
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self._create_appservice_txn,
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service, events
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)
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def _create_appservice_txn(self, txn, service, events):
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# work out new txn id (highest txn id for this service += 1)
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# The highest id may be the last one sent (in which case it is last_txn)
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# or it may be the highest in the txns list (which are waiting to be/are
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# being sent)
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last_txn_id = self._get_last_txn(txn, service.id)
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result = txn.execute(
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"SELECT MAX(txn_id) FROM application_services_txns WHERE as_id=?",
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(service.id,)
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)
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highest_txn_id = result.fetchone()[0]
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if highest_txn_id is None:
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highest_txn_id = 0
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new_txn_id = max(highest_txn_id, last_txn_id) + 1
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# Insert new txn into txn table
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event_ids = [e.event_id for e in events]
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txn.execute(
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"INSERT INTO application_services_txns(as_id, txn_id, event_ids) "
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"VALUES(?,?,?)",
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(service.id, new_txn_id, json.dumps(event_ids))
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)
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return AppServiceTransaction(
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service=service, id=new_txn_id, events=events
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)
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def complete_appservice_txn(self, txn_id, service):
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"""Completes an application service transaction.
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Args:
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txn_id(str): The transaction ID being completed.
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service(ApplicationService): The application service which was sent
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this transaction.
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Returns:
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A Deferred which resolves if this transaction was stored
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successfully.
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"""
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return self.runInteraction(
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"complete_appservice_txn",
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self._complete_appservice_txn,
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txn_id, service
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)
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def _complete_appservice_txn(self, txn, txn_id, service):
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txn_id = int(txn_id)
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# Debugging query: Make sure the txn being completed is EXACTLY +1 from
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# what was there before. If it isn't, we've got problems (e.g. the AS
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# has probably missed some events), so whine loudly but still continue,
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# since it shouldn't fail completion of the transaction.
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last_txn_id = self._get_last_txn(txn, service.id)
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if (last_txn_id + 1) != txn_id:
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logger.error(
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"appservice: Completing a transaction which has an ID > 1 from "
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"the last ID sent to this AS. We've either dropped events or "
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"sent it to the AS out of order. FIX ME. last_txn=%s "
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"completing_txn=%s service_id=%s", last_txn_id, txn_id,
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service.id
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)
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# Set current txn_id for AS to 'txn_id'
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self._simple_upsert_txn(
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txn, "application_services_state", dict(as_id=service.id),
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dict(last_txn=txn_id)
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)
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# Delete txn
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self._simple_delete_txn(
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txn, "application_services_txns",
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dict(txn_id=txn_id, as_id=service.id)
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)
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def get_oldest_unsent_txn(self, service):
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"""Get the oldest transaction which has not been sent for this
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service.
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Args:
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service(ApplicationService): The app service to get the oldest txn.
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Returns:
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A Deferred which resolves to an AppServiceTransaction or
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None.
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"""
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return self.runInteraction(
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"get_oldest_unsent_appservice_txn",
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self._get_oldest_unsent_txn,
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service
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)
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def _get_oldest_unsent_txn(self, txn, service):
|
|
# Monotonically increasing txn ids, so just select the smallest
|
|
# one in the txns table (we delete them when they are sent)
|
|
result = txn.execute(
|
|
"SELECT MIN(txn_id), * FROM application_services_txns WHERE as_id=?",
|
|
(service.id,)
|
|
)
|
|
entry = self.cursor_to_dict(result)[0]
|
|
if not entry or entry["txn_id"] is None:
|
|
# the min(txn_id) part will force a row, so entry may not be None
|
|
return None
|
|
|
|
event_ids = json.loads(entry["event_ids"])
|
|
events = self._get_events_txn(txn, event_ids)
|
|
|
|
return AppServiceTransaction(
|
|
service=service, id=entry["txn_id"], events=events
|
|
)
|
|
|
|
def _get_last_txn(self, txn, service_id):
|
|
result = txn.execute(
|
|
"SELECT last_txn FROM application_services_state WHERE as_id=?",
|
|
(service_id,)
|
|
)
|
|
last_txn_id = result.fetchone()
|
|
if last_txn_id is None or last_txn_id[0] is None: # no row exists
|
|
return 0
|
|
else:
|
|
return int(last_txn_id[0]) # select 'last_txn' col
|