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https://mau.dev/maunium/synapse.git
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c626fc576a
Access it directly from the homeserver itself. It already wasn't inheriting from BaseHandler storing it on the Handlers object was already somewhat dubious.
343 lines
12 KiB
Python
343 lines
12 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014-2016 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 ._base import BaseHandler
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from synapse.api.errors import SynapseError, Codes, CodeMessageException, AuthError
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from synapse.api.constants import EventTypes
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from synapse.types import RoomAlias, UserID
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import logging
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import string
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logger = logging.getLogger(__name__)
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class DirectoryHandler(BaseHandler):
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def __init__(self, hs):
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super(DirectoryHandler, self).__init__(hs)
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self.state = hs.get_state_handler()
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self.appservice_handler = hs.get_application_service_handler()
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self.federation = hs.get_replication_layer()
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self.federation.register_query_handler(
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"directory", self.on_directory_query
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)
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@defer.inlineCallbacks
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def _create_association(self, room_alias, room_id, servers=None, creator=None):
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# general association creation for both human users and app services
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for wchar in string.whitespace:
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if wchar in room_alias.localpart:
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raise SynapseError(400, "Invalid characters in room alias")
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if not self.hs.is_mine(room_alias):
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raise SynapseError(400, "Room alias must be local")
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# TODO(erikj): Change this.
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# TODO(erikj): Add transactions.
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# TODO(erikj): Check if there is a current association.
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if not servers:
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servers = yield self.store.get_joined_hosts_for_room(room_id)
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if not servers:
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raise SynapseError(400, "Failed to get server list")
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yield self.store.create_room_alias_association(
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room_alias,
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room_id,
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servers,
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creator=creator,
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)
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@defer.inlineCallbacks
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def create_association(self, user_id, room_alias, room_id, servers=None):
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# association creation for human users
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# TODO(erikj): Do user auth.
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can_create = yield self.can_modify_alias(
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room_alias,
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user_id=user_id
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)
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if not can_create:
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raise SynapseError(
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400, "This alias is reserved by an application service.",
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errcode=Codes.EXCLUSIVE
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)
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yield self._create_association(room_alias, room_id, servers, creator=user_id)
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@defer.inlineCallbacks
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def create_appservice_association(self, service, room_alias, room_id,
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servers=None):
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if not service.is_interested_in_alias(room_alias.to_string()):
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raise SynapseError(
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400, "This application service has not reserved"
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" this kind of alias.", errcode=Codes.EXCLUSIVE
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)
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# association creation for app services
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yield self._create_association(room_alias, room_id, servers)
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@defer.inlineCallbacks
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def delete_association(self, requester, user_id, room_alias):
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# association deletion for human users
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can_delete = yield self._user_can_delete_alias(room_alias, user_id)
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if not can_delete:
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raise AuthError(
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403, "You don't have permission to delete the alias.",
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)
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can_delete = yield self.can_modify_alias(
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room_alias,
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user_id=user_id
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)
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if not can_delete:
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raise SynapseError(
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400, "This alias is reserved by an application service.",
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errcode=Codes.EXCLUSIVE
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)
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room_id = yield self._delete_association(room_alias)
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try:
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yield self.send_room_alias_update_event(
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requester,
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requester.user.to_string(),
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room_id
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)
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yield self._update_canonical_alias(
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requester,
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requester.user.to_string(),
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room_id,
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room_alias,
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)
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except AuthError as e:
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logger.info("Failed to update alias events: %s", e)
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defer.returnValue(room_id)
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@defer.inlineCallbacks
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def delete_appservice_association(self, service, room_alias):
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if not service.is_interested_in_alias(room_alias.to_string()):
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raise SynapseError(
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400,
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"This application service has not reserved this kind of alias",
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errcode=Codes.EXCLUSIVE
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)
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yield self._delete_association(room_alias)
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@defer.inlineCallbacks
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def _delete_association(self, room_alias):
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if not self.hs.is_mine(room_alias):
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raise SynapseError(400, "Room alias must be local")
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room_id = yield self.store.delete_room_alias(room_alias)
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defer.returnValue(room_id)
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@defer.inlineCallbacks
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def get_association(self, room_alias):
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room_id = None
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if self.hs.is_mine(room_alias):
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result = yield self.get_association_from_room_alias(
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room_alias
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)
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if result:
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room_id = result.room_id
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servers = result.servers
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else:
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try:
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result = yield self.federation.make_query(
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destination=room_alias.domain,
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query_type="directory",
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args={
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"room_alias": room_alias.to_string(),
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},
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retry_on_dns_fail=False,
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)
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except CodeMessageException as e:
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logging.warn("Error retrieving alias")
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if e.code == 404:
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result = None
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else:
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raise
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if result and "room_id" in result and "servers" in result:
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room_id = result["room_id"]
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servers = result["servers"]
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if not room_id:
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raise SynapseError(
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404,
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"Room alias %s not found" % (room_alias.to_string(),),
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Codes.NOT_FOUND
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)
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extra_servers = yield self.store.get_joined_hosts_for_room(room_id)
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servers = set(extra_servers) | set(servers)
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# If this server is in the list of servers, return it first.
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if self.server_name in servers:
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servers = (
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[self.server_name] +
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[s for s in servers if s != self.server_name]
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)
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else:
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servers = list(servers)
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defer.returnValue({
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"room_id": room_id,
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"servers": servers,
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})
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return
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@defer.inlineCallbacks
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def on_directory_query(self, args):
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room_alias = RoomAlias.from_string(args["room_alias"])
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if not self.hs.is_mine(room_alias):
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raise SynapseError(
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400, "Room Alias is not hosted on this Home Server"
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)
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result = yield self.get_association_from_room_alias(
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room_alias
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)
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if result is not None:
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defer.returnValue({
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"room_id": result.room_id,
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"servers": result.servers,
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})
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else:
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raise SynapseError(
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404,
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"Room alias %r not found" % (room_alias.to_string(),),
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Codes.NOT_FOUND
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)
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@defer.inlineCallbacks
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def send_room_alias_update_event(self, requester, user_id, room_id):
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aliases = yield self.store.get_aliases_for_room(room_id)
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msg_handler = self.hs.get_handlers().message_handler
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yield msg_handler.create_and_send_nonmember_event(
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requester,
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{
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"type": EventTypes.Aliases,
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"state_key": self.hs.hostname,
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"room_id": room_id,
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"sender": user_id,
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"content": {"aliases": aliases},
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},
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ratelimit=False
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)
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@defer.inlineCallbacks
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def _update_canonical_alias(self, requester, user_id, room_id, room_alias):
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alias_event = yield self.state.get_current_state(
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room_id, EventTypes.CanonicalAlias, ""
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)
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alias_str = room_alias.to_string()
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if not alias_event or alias_event.content.get("alias", "") != alias_str:
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return
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msg_handler = self.hs.get_handlers().message_handler
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yield msg_handler.create_and_send_nonmember_event(
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requester,
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{
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"type": EventTypes.CanonicalAlias,
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"state_key": "",
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"room_id": room_id,
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"sender": user_id,
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"content": {},
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},
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ratelimit=False
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)
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@defer.inlineCallbacks
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def get_association_from_room_alias(self, room_alias):
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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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if not result:
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# Query AS to see if it exists
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as_handler = self.appservice_handler
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result = yield as_handler.query_room_alias_exists(room_alias)
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defer.returnValue(result)
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@defer.inlineCallbacks
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def can_modify_alias(self, alias, user_id=None):
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# Any application service "interested" in an alias they are regexing on
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# can modify the alias.
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# Users can only modify the alias if ALL the interested services have
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# non-exclusive locks on the alias (or there are no interested services)
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services = yield self.store.get_app_services()
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interested_services = [
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s for s in services if s.is_interested_in_alias(alias.to_string())
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]
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for service in interested_services:
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if user_id == service.sender:
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# this user IS the app service so they can do whatever they like
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defer.returnValue(True)
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return
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elif service.is_exclusive_alias(alias.to_string()):
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# another service has an exclusive lock on this alias.
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defer.returnValue(False)
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return
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# either no interested services, or no service with an exclusive lock
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defer.returnValue(True)
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@defer.inlineCallbacks
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def _user_can_delete_alias(self, alias, user_id):
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creator = yield self.store.get_room_alias_creator(alias.to_string())
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if creator and creator == user_id:
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defer.returnValue(True)
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is_admin = yield self.auth.is_server_admin(UserID.from_string(user_id))
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defer.returnValue(is_admin)
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@defer.inlineCallbacks
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def edit_published_room_list(self, requester, room_id, visibility):
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"""Edit the entry of the room in the published room list.
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requester
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room_id (str)
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visibility (str): "public" or "private"
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"""
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if requester.is_guest:
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raise AuthError(403, "Guests cannot edit the published room list")
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if visibility not in ["public", "private"]:
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raise SynapseError(400, "Invalid visibility setting")
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room = yield self.store.get_room(room_id)
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if room is None:
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raise SynapseError(400, "Unknown room")
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yield self.auth.check_can_change_room_list(room_id, requester.user)
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yield self.store.set_room_is_public(room_id, visibility == "public")
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