465 lines
16 KiB
Python
465 lines
16 KiB
Python
# -*- coding: utf-8 -*-
|
|
# Copyright 2014-2016 OpenMarket Ltd
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
|
|
|
|
import logging
|
|
import string
|
|
|
|
from twisted.internet import defer
|
|
|
|
from synapse.api.constants import EventTypes
|
|
from synapse.api.errors import (
|
|
AuthError,
|
|
CodeMessageException,
|
|
Codes,
|
|
NotFoundError,
|
|
StoreError,
|
|
SynapseError,
|
|
)
|
|
from synapse.types import RoomAlias, UserID, get_domain_from_id
|
|
|
|
from ._base import BaseHandler
|
|
|
|
logger = logging.getLogger(__name__)
|
|
|
|
|
|
class DirectoryHandler(BaseHandler):
|
|
|
|
def __init__(self, hs):
|
|
super(DirectoryHandler, self).__init__(hs)
|
|
|
|
self.state = hs.get_state_handler()
|
|
self.appservice_handler = hs.get_application_service_handler()
|
|
self.event_creation_handler = hs.get_event_creation_handler()
|
|
self.config = hs.config
|
|
self.enable_room_list_search = hs.config.enable_room_list_search
|
|
|
|
self.federation = hs.get_federation_client()
|
|
hs.get_federation_registry().register_query_handler(
|
|
"directory", self.on_directory_query
|
|
)
|
|
|
|
self.spam_checker = hs.get_spam_checker()
|
|
|
|
@defer.inlineCallbacks
|
|
def _create_association(self, room_alias, room_id, servers=None, creator=None):
|
|
# general association creation for both human users and app services
|
|
|
|
for wchar in string.whitespace:
|
|
if wchar in room_alias.localpart:
|
|
raise SynapseError(400, "Invalid characters in room alias")
|
|
|
|
if not self.hs.is_mine(room_alias):
|
|
raise SynapseError(400, "Room alias must be local")
|
|
# TODO(erikj): Change this.
|
|
|
|
# TODO(erikj): Add transactions.
|
|
# TODO(erikj): Check if there is a current association.
|
|
if not servers:
|
|
users = yield self.state.get_current_user_in_room(room_id)
|
|
servers = set(get_domain_from_id(u) for u in users)
|
|
|
|
if not servers:
|
|
raise SynapseError(400, "Failed to get server list")
|
|
|
|
yield self.store.create_room_alias_association(
|
|
room_alias,
|
|
room_id,
|
|
servers,
|
|
creator=creator,
|
|
)
|
|
|
|
@defer.inlineCallbacks
|
|
def create_association(self, requester, room_alias, room_id, servers=None,
|
|
send_event=True):
|
|
"""Attempt to create a new alias
|
|
|
|
Args:
|
|
requester (Requester)
|
|
room_alias (RoomAlias)
|
|
room_id (str)
|
|
servers (list[str]|None): List of servers that others servers
|
|
should try and join via
|
|
send_event (bool): Whether to send an updated m.room.aliases event
|
|
|
|
Returns:
|
|
Deferred
|
|
"""
|
|
|
|
user_id = requester.user.to_string()
|
|
|
|
service = requester.app_service
|
|
if service:
|
|
if not service.is_interested_in_alias(room_alias.to_string()):
|
|
raise SynapseError(
|
|
400, "This application service has not reserved"
|
|
" this kind of alias.", errcode=Codes.EXCLUSIVE
|
|
)
|
|
else:
|
|
if not self.spam_checker.user_may_create_room_alias(user_id, room_alias):
|
|
raise AuthError(
|
|
403, "This user is not permitted to create this alias",
|
|
)
|
|
|
|
if not self.config.is_alias_creation_allowed(
|
|
user_id, room_id, room_alias.to_string(),
|
|
):
|
|
# Lets just return a generic message, as there may be all sorts of
|
|
# reasons why we said no. TODO: Allow configurable error messages
|
|
# per alias creation rule?
|
|
raise SynapseError(
|
|
403, "Not allowed to create alias",
|
|
)
|
|
|
|
can_create = yield self.can_modify_alias(
|
|
room_alias,
|
|
user_id=user_id
|
|
)
|
|
if not can_create:
|
|
raise AuthError(
|
|
400, "This alias is reserved by an application service.",
|
|
errcode=Codes.EXCLUSIVE
|
|
)
|
|
|
|
yield self._create_association(room_alias, room_id, servers, creator=user_id)
|
|
if send_event:
|
|
yield self.send_room_alias_update_event(
|
|
requester,
|
|
room_id
|
|
)
|
|
|
|
@defer.inlineCallbacks
|
|
def delete_association(self, requester, room_alias, send_event=True):
|
|
"""Remove an alias from the directory
|
|
|
|
(this is only meant for human users; AS users should call
|
|
delete_appservice_association)
|
|
|
|
Args:
|
|
requester (Requester):
|
|
room_alias (RoomAlias):
|
|
send_event (bool): Whether to send an updated m.room.aliases event.
|
|
Note that, if we delete the canonical alias, we will always attempt
|
|
to send an m.room.canonical_alias event
|
|
|
|
Returns:
|
|
Deferred[unicode]: room id that the alias used to point to
|
|
|
|
Raises:
|
|
NotFoundError: if the alias doesn't exist
|
|
|
|
AuthError: if the user doesn't have perms to delete the alias (ie, the user
|
|
is neither the creator of the alias, nor a server admin.
|
|
|
|
SynapseError: if the alias belongs to an AS
|
|
"""
|
|
user_id = requester.user.to_string()
|
|
|
|
try:
|
|
can_delete = yield self._user_can_delete_alias(room_alias, user_id)
|
|
except StoreError as e:
|
|
if e.code == 404:
|
|
raise NotFoundError("Unknown room alias")
|
|
raise
|
|
|
|
if not can_delete:
|
|
raise AuthError(
|
|
403, "You don't have permission to delete the alias.",
|
|
)
|
|
|
|
can_delete = yield self.can_modify_alias(
|
|
room_alias,
|
|
user_id=user_id
|
|
)
|
|
if not can_delete:
|
|
raise SynapseError(
|
|
400, "This alias is reserved by an application service.",
|
|
errcode=Codes.EXCLUSIVE
|
|
)
|
|
|
|
room_id = yield self._delete_association(room_alias)
|
|
|
|
try:
|
|
if send_event:
|
|
yield self.send_room_alias_update_event(
|
|
requester,
|
|
room_id
|
|
)
|
|
|
|
yield self._update_canonical_alias(
|
|
requester,
|
|
requester.user.to_string(),
|
|
room_id,
|
|
room_alias,
|
|
)
|
|
except AuthError as e:
|
|
logger.info("Failed to update alias events: %s", e)
|
|
|
|
defer.returnValue(room_id)
|
|
|
|
@defer.inlineCallbacks
|
|
def delete_appservice_association(self, service, room_alias):
|
|
if not service.is_interested_in_alias(room_alias.to_string()):
|
|
raise SynapseError(
|
|
400,
|
|
"This application service has not reserved this kind of alias",
|
|
errcode=Codes.EXCLUSIVE
|
|
)
|
|
yield self._delete_association(room_alias)
|
|
|
|
@defer.inlineCallbacks
|
|
def _delete_association(self, room_alias):
|
|
if not self.hs.is_mine(room_alias):
|
|
raise SynapseError(400, "Room alias must be local")
|
|
|
|
room_id = yield self.store.delete_room_alias(room_alias)
|
|
|
|
defer.returnValue(room_id)
|
|
|
|
@defer.inlineCallbacks
|
|
def get_association(self, room_alias):
|
|
room_id = None
|
|
if self.hs.is_mine(room_alias):
|
|
result = yield self.get_association_from_room_alias(
|
|
room_alias
|
|
)
|
|
|
|
if result:
|
|
room_id = result.room_id
|
|
servers = result.servers
|
|
else:
|
|
try:
|
|
result = yield self.federation.make_query(
|
|
destination=room_alias.domain,
|
|
query_type="directory",
|
|
args={
|
|
"room_alias": room_alias.to_string(),
|
|
},
|
|
retry_on_dns_fail=False,
|
|
ignore_backoff=True,
|
|
)
|
|
except CodeMessageException as e:
|
|
logging.warn("Error retrieving alias")
|
|
if e.code == 404:
|
|
result = None
|
|
else:
|
|
raise
|
|
|
|
if result and "room_id" in result and "servers" in result:
|
|
room_id = result["room_id"]
|
|
servers = result["servers"]
|
|
|
|
if not room_id:
|
|
raise SynapseError(
|
|
404,
|
|
"Room alias %s not found" % (room_alias.to_string(),),
|
|
Codes.NOT_FOUND
|
|
)
|
|
|
|
users = yield self.state.get_current_user_in_room(room_id)
|
|
extra_servers = set(get_domain_from_id(u) for u in users)
|
|
servers = set(extra_servers) | set(servers)
|
|
|
|
# If this server is in the list of servers, return it first.
|
|
if self.server_name in servers:
|
|
servers = (
|
|
[self.server_name] +
|
|
[s for s in servers if s != self.server_name]
|
|
)
|
|
else:
|
|
servers = list(servers)
|
|
|
|
defer.returnValue({
|
|
"room_id": room_id,
|
|
"servers": servers,
|
|
})
|
|
return
|
|
|
|
@defer.inlineCallbacks
|
|
def on_directory_query(self, args):
|
|
room_alias = RoomAlias.from_string(args["room_alias"])
|
|
if not self.hs.is_mine(room_alias):
|
|
raise SynapseError(
|
|
400, "Room Alias is not hosted on this Home Server"
|
|
)
|
|
|
|
result = yield self.get_association_from_room_alias(
|
|
room_alias
|
|
)
|
|
|
|
if result is not None:
|
|
defer.returnValue({
|
|
"room_id": result.room_id,
|
|
"servers": result.servers,
|
|
})
|
|
else:
|
|
raise SynapseError(
|
|
404,
|
|
"Room alias %r not found" % (room_alias.to_string(),),
|
|
Codes.NOT_FOUND
|
|
)
|
|
|
|
@defer.inlineCallbacks
|
|
def send_room_alias_update_event(self, requester, room_id):
|
|
aliases = yield self.store.get_aliases_for_room(room_id)
|
|
|
|
yield self.event_creation_handler.create_and_send_nonmember_event(
|
|
requester,
|
|
{
|
|
"type": EventTypes.Aliases,
|
|
"state_key": self.hs.hostname,
|
|
"room_id": room_id,
|
|
"sender": requester.user.to_string(),
|
|
"content": {"aliases": aliases},
|
|
},
|
|
ratelimit=False
|
|
)
|
|
|
|
@defer.inlineCallbacks
|
|
def _update_canonical_alias(self, requester, user_id, room_id, room_alias):
|
|
alias_event = yield self.state.get_current_state(
|
|
room_id, EventTypes.CanonicalAlias, ""
|
|
)
|
|
|
|
alias_str = room_alias.to_string()
|
|
if not alias_event or alias_event.content.get("alias", "") != alias_str:
|
|
return
|
|
|
|
yield self.event_creation_handler.create_and_send_nonmember_event(
|
|
requester,
|
|
{
|
|
"type": EventTypes.CanonicalAlias,
|
|
"state_key": "",
|
|
"room_id": room_id,
|
|
"sender": user_id,
|
|
"content": {},
|
|
},
|
|
ratelimit=False
|
|
)
|
|
|
|
@defer.inlineCallbacks
|
|
def get_association_from_room_alias(self, room_alias):
|
|
result = yield self.store.get_association_from_room_alias(
|
|
room_alias
|
|
)
|
|
if not result:
|
|
# Query AS to see if it exists
|
|
as_handler = self.appservice_handler
|
|
result = yield as_handler.query_room_alias_exists(room_alias)
|
|
defer.returnValue(result)
|
|
|
|
def can_modify_alias(self, alias, user_id=None):
|
|
# Any application service "interested" in an alias they are regexing on
|
|
# can modify the alias.
|
|
# Users can only modify the alias if ALL the interested services have
|
|
# non-exclusive locks on the alias (or there are no interested services)
|
|
services = self.store.get_app_services()
|
|
interested_services = [
|
|
s for s in services if s.is_interested_in_alias(alias.to_string())
|
|
]
|
|
|
|
for service in interested_services:
|
|
if user_id == service.sender:
|
|
# this user IS the app service so they can do whatever they like
|
|
return defer.succeed(True)
|
|
elif service.is_exclusive_alias(alias.to_string()):
|
|
# another service has an exclusive lock on this alias.
|
|
return defer.succeed(False)
|
|
# either no interested services, or no service with an exclusive lock
|
|
return defer.succeed(True)
|
|
|
|
@defer.inlineCallbacks
|
|
def _user_can_delete_alias(self, alias, user_id):
|
|
creator = yield self.store.get_room_alias_creator(alias.to_string())
|
|
|
|
if creator is not None and creator == user_id:
|
|
defer.returnValue(True)
|
|
|
|
is_admin = yield self.auth.is_server_admin(UserID.from_string(user_id))
|
|
defer.returnValue(is_admin)
|
|
|
|
@defer.inlineCallbacks
|
|
def edit_published_room_list(self, requester, room_id, visibility):
|
|
"""Edit the entry of the room in the published room list.
|
|
|
|
requester
|
|
room_id (str)
|
|
visibility (str): "public" or "private"
|
|
"""
|
|
user_id = requester.user.to_string()
|
|
|
|
if not self.spam_checker.user_may_publish_room(user_id, room_id):
|
|
raise AuthError(
|
|
403,
|
|
"This user is not permitted to publish rooms to the room list"
|
|
)
|
|
|
|
if requester.is_guest:
|
|
raise AuthError(403, "Guests cannot edit the published room list")
|
|
|
|
if visibility not in ["public", "private"]:
|
|
raise SynapseError(400, "Invalid visibility setting")
|
|
|
|
if visibility == "public" and not self.enable_room_list_search:
|
|
# The room list has been disabled.
|
|
raise AuthError(
|
|
403,
|
|
"This user is not permitted to publish rooms to the room list"
|
|
)
|
|
|
|
room = yield self.store.get_room(room_id)
|
|
if room is None:
|
|
raise SynapseError(400, "Unknown room")
|
|
|
|
yield self.auth.check_can_change_room_list(room_id, requester.user)
|
|
|
|
making_public = visibility == "public"
|
|
if making_public:
|
|
room_aliases = yield self.store.get_aliases_for_room(room_id)
|
|
canonical_alias = yield self.store.get_canonical_alias_for_room(room_id)
|
|
if canonical_alias:
|
|
room_aliases.append(canonical_alias)
|
|
|
|
if not self.config.is_publishing_room_allowed(
|
|
user_id, room_id, room_aliases,
|
|
):
|
|
# Lets just return a generic message, as there may be all sorts of
|
|
# reasons why we said no. TODO: Allow configurable error messages
|
|
# per alias creation rule?
|
|
raise SynapseError(
|
|
403, "Not allowed to publish room",
|
|
)
|
|
|
|
yield self.store.set_room_is_public(room_id, making_public)
|
|
|
|
@defer.inlineCallbacks
|
|
def edit_published_appservice_room_list(self, appservice_id, network_id,
|
|
room_id, visibility):
|
|
"""Add or remove a room from the appservice/network specific public
|
|
room list.
|
|
|
|
Args:
|
|
appservice_id (str): ID of the appservice that owns the list
|
|
network_id (str): The ID of the network the list is associated with
|
|
room_id (str)
|
|
visibility (str): either "public" or "private"
|
|
"""
|
|
if visibility not in ["public", "private"]:
|
|
raise SynapseError(400, "Invalid visibility setting")
|
|
|
|
yield self.store.set_room_is_public_appservice(
|
|
room_id, appservice_id, network_id, visibility == "public"
|
|
)
|