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# -*- coding: utf-8 -*-
# Copyright 2018 New Vector 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
from typing import TYPE_CHECKING, List, Optional, Tuple
from twisted.web.http import Request
from synapse.http.servlet import parse_json_object_from_request
from synapse.replication.http._base import ReplicationEndpoint
from synapse.types import JsonDict, Requester, UserID
from synapse.util.distributor import user_left_room
if TYPE_CHECKING:
from synapse.server import HomeServer
logger = logging.getLogger(__name__)
class ReplicationRemoteJoinRestServlet(ReplicationEndpoint):
"""Does a remote join for the given user to the given room
Request format:
POST /_synapse/replication/remote_join/:room_id/:user_id
{
"requester": ...,
"remote_room_hosts": [...],
"content": { ... }
}
"""
NAME = "remote_join"
PATH_ARGS = ("room_id", "user_id")
def __init__(self, hs):
super().__init__(hs)
self.federation_handler = hs.get_federation_handler()
self.store = hs.get_datastore()
self.clock = hs.get_clock()
@staticmethod
async def _serialize_payload( # type: ignore
requester: Requester,
room_id: str,
user_id: str,
remote_room_hosts: List[str],
content: JsonDict,
) -> JsonDict:
"""
Args:
requester: The user making the request according to the access token
room_id: The ID of the room.
user_id: The ID of the user.
remote_room_hosts: Servers to try and join via
content: The event content to use for the join event
Returns:
A dict representing the payload of the request.
"""
return {
"requester": requester.serialize(),
"remote_room_hosts": remote_room_hosts,
"content": content,
}
async def _handle_request( # type: ignore
self, request: Request, room_id: str, user_id: str
) -> Tuple[int, JsonDict]:
content = parse_json_object_from_request(request)
remote_room_hosts = content["remote_room_hosts"]
event_content = content["content"]
requester = Requester.deserialize(self.store, content["requester"])
request.requester = requester
logger.info("remote_join: %s into room: %s", user_id, room_id)
event_id, stream_id = await self.federation_handler.do_invite_join(
remote_room_hosts, room_id, user_id, event_content
)
return 200, {"event_id": event_id, "stream_id": stream_id}
class ReplicationRemoteRejectInviteRestServlet(ReplicationEndpoint):
"""Rejects an out-of-band invite we have received from a remote server
Request format:
POST /_synapse/replication/remote_reject_invite/:event_id
{
"txn_id": ...,
"requester": ...,
"content": { ... }
}
"""
NAME = "remote_reject_invite"
PATH_ARGS = ("invite_event_id",)
def __init__(self, hs: "HomeServer"):
super().__init__(hs)
self.store = hs.get_datastore()
self.clock = hs.get_clock()
self.member_handler = hs.get_room_member_handler()
@staticmethod
async def _serialize_payload( # type: ignore
invite_event_id: str,
txn_id: Optional[str],
requester: Requester,
content: JsonDict,
) -> JsonDict:
"""
Args:
invite_event_id: The ID of the invite to be rejected.
txn_id: Optional transaction ID supplied by the client
requester: User making the rejection request, according to the access token
content: Additional content to include in the rejection event.
Normally an empty dict.
Returns:
A dict representing the payload of the request.
"""
return {
"txn_id": txn_id,
"requester": requester.serialize(),
"content": content,
}
async def _handle_request( # type: ignore
self, request: Request, invite_event_id: str
) -> Tuple[int, JsonDict]:
content = parse_json_object_from_request(request)
txn_id = content["txn_id"]
event_content = content["content"]
requester = Requester.deserialize(self.store, content["requester"])
request.requester = requester
# hopefully we're now on the master, so this won't recurse!
event_id, stream_id = await self.member_handler.remote_reject_invite(
invite_event_id, txn_id, requester, event_content,
)
return 200, {"event_id": event_id, "stream_id": stream_id}
class ReplicationUserJoinedLeftRoomRestServlet(ReplicationEndpoint):
"""Notifies that a user has joined or left the room
Request format:
POST /_synapse/replication/membership_change/:room_id/:user_id/:change
{}
"""
NAME = "membership_change"
PATH_ARGS = ("room_id", "user_id", "change")
CACHE = False # No point caching as should return instantly.
def __init__(self, hs):
super().__init__(hs)
self.registeration_handler = hs.get_registration_handler()
self.store = hs.get_datastore()
self.clock = hs.get_clock()
self.distributor = hs.get_distributor()
@staticmethod
async def _serialize_payload( # type: ignore
room_id: str, user_id: str, change: str
) -> JsonDict:
"""
Args:
room_id: The ID of the room.
user_id: The ID of the user.
change: "left"
Returns:
A dict representing the payload of the request.
"""
assert change == "left"
return {}
def _handle_request( # type: ignore
self, request: Request, room_id: str, user_id: str, change: str
) -> Tuple[int, JsonDict]:
logger.info("user membership change: %s in %s", user_id, room_id)
user = UserID.from_string(user_id)
if change == "left":
user_left_room(self.distributor, user, room_id)
else:
raise Exception("Unrecognized change: %r", change)
return 200, {}
def register_servlets(hs, http_server):
ReplicationRemoteJoinRestServlet(hs).register(http_server)
ReplicationRemoteRejectInviteRestServlet(hs).register(http_server)
ReplicationUserJoinedLeftRoomRestServlet(hs).register(http_server)
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