438 lines
16 KiB
Python
438 lines
16 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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import logging
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import urllib
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import yaml
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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.appservice import ApplicationService, AppServiceTransaction
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from synapse.config._base import ConfigError
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from synapse.storage.roommember import RoomsForUser
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from synapse.types import UserID
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from ._base import SQLBaseStore
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logger = logging.getLogger(__name__)
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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.hostname = hs.hostname
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self.services_cache = []
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self._populate_appservice_cache(
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hs.config.app_service_config_files
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)
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def get_app_services(self):
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return defer.succeed(self.services_cache)
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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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for service in self.services_cache:
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if service.sender == user_id:
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return defer.succeed(service)
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return defer.succeed(None)
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def get_app_service_by_token(self, token):
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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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Returns:
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synapse.appservice.ApplicationService or None.
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"""
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for service in self.services_cache:
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if service.token == token:
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return defer.succeed(service)
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return defer.succeed(None)
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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 _load_appservice(self, as_info):
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required_string_fields = [
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# TODO: Add id here when it's stable to release
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"url", "as_token", "hs_token", "sender_localpart"
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]
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for field in required_string_fields:
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if not isinstance(as_info.get(field), basestring):
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raise KeyError("Required string field: '%s'", field)
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localpart = as_info["sender_localpart"]
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if urllib.quote(localpart) != localpart:
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raise ValueError(
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"sender_localpart needs characters which are not URL encoded."
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)
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user = UserID(localpart, self.hostname)
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user_id = user.to_string()
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# namespace checks
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if not isinstance(as_info.get("namespaces"), dict):
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raise KeyError("Requires 'namespaces' object.")
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for ns in ApplicationService.NS_LIST:
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# specific namespaces are optional
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if ns in as_info["namespaces"]:
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# expect a list of dicts with exclusive and regex keys
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for regex_obj in as_info["namespaces"][ns]:
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if not isinstance(regex_obj, dict):
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raise ValueError(
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"Expected namespace entry in %s to be an object,"
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" but got %s", ns, regex_obj
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)
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if not isinstance(regex_obj.get("regex"), basestring):
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raise ValueError(
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"Missing/bad type 'regex' key in %s", regex_obj
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)
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if not isinstance(regex_obj.get("exclusive"), bool):
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raise ValueError(
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"Missing/bad type 'exclusive' key in %s", regex_obj
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)
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return ApplicationService(
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token=as_info["as_token"],
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url=as_info["url"],
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namespaces=as_info["namespaces"],
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hs_token=as_info["hs_token"],
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sender=user_id,
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id=as_info["id"] if "id" in as_info else as_info["as_token"],
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)
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def _populate_appservice_cache(self, config_files):
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"""Populates a cache of Application Services from the config files."""
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if not isinstance(config_files, list):
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logger.warning(
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"Expected %s to be a list of AS config files.", config_files
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)
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return
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# Dicts of value -> filename
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seen_as_tokens = {}
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seen_ids = {}
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for config_file in config_files:
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try:
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with open(config_file, 'r') as f:
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appservice = self._load_appservice(yaml.load(f))
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if appservice.id in seen_ids:
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raise ConfigError(
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"Cannot reuse ID across application services: "
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"%s (files: %s, %s)" % (
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appservice.id, config_file, seen_ids[appservice.id],
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)
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)
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seen_ids[appservice.id] = config_file
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if appservice.token in seen_as_tokens:
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raise ConfigError(
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"Cannot reuse as_token across application services: "
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"%s (files: %s, %s)" % (
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appservice.token,
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config_file,
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seen_as_tokens[appservice.token],
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)
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)
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seen_as_tokens[appservice.token] = config_file
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logger.info("Loaded application service: %s", appservice)
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self.services_cache.append(appservice)
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except Exception as e:
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logger.error("Failed to load appservice from '%s'", config_file)
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logger.exception(e)
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raise
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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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results = yield self._simple_select_list(
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"application_services_state",
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dict(state=state),
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["as_id"]
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)
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# NB: This assumes this class is linked with ApplicationServiceStore
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as_list = yield self.get_app_services()
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services = []
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for res in results:
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for service in as_list:
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if service.id == res["as_id"]:
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services.append(service)
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defer.returnValue(services)
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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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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 = txn.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 = json.dumps([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, 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):
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# Monotonically increasing txn ids, so just select the smallest
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# one in the txns table (we delete them when they are sent)
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txn.execute(
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"SELECT * FROM application_services_txns WHERE as_id=?"
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" ORDER BY txn_id ASC LIMIT 1",
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(service.id,)
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)
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rows = self.cursor_to_dict(txn)
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if not rows:
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return None
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entry = rows[0]
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event_ids = json.loads(entry["event_ids"])
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events = self._get_events_txn(txn, event_ids)
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return AppServiceTransaction(
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service=service, id=entry["txn_id"], events=events
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)
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def _get_last_txn(self, txn, service_id):
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txn.execute(
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"SELECT last_txn FROM application_services_state WHERE as_id=?",
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(service_id,)
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)
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last_txn_id = txn.fetchone()
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if last_txn_id is None or last_txn_id[0] is None: # no row exists
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return 0
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else:
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return int(last_txn_id[0]) # select 'last_txn' col
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