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# Copyright 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
from typing import TYPE_CHECKING, Tuple
from synapse.api.errors import Codes, ShadowBanError, SynapseError
from synapse.api.room_versions import KNOWN_ROOM_VERSIONS
from synapse.handlers.worker_lock import NEW_EVENT_DURING_PURGE_LOCK_NAME
from synapse.http.server import HttpServer
from synapse.http.servlet import (
RestServlet,
assert_params_in_dict,
parse_json_object_from_request,
)
from synapse.http.site import SynapseRequest
from synapse.types import JsonDict
from synapse.util import stringutils
from ._base import client_patterns
if TYPE_CHECKING:
from synapse.server import HomeServer
logger = logging.getLogger(__name__)
class RoomUpgradeRestServlet(RestServlet):
"""Handler for room upgrade requests.
Handles requests of the form:
POST /_matrix/client/r0/rooms/$roomid/upgrade HTTP/1.1
Content-Type: application/json
{
"new_version": "2",
}
Creates a new room and shuts down the old one. Returns the ID of the new room.
"""
PATTERNS = client_patterns(
# /rooms/$roomid/upgrade
"/rooms/(?P<room_id>[^/]*)/upgrade$"
)
def __init__(self, hs: "HomeServer"):
super().__init__()
self._hs = hs
self._room_creation_handler = hs.get_room_creation_handler()
self._auth = hs.get_auth()
self._worker_lock_handler = hs.get_worker_locks_handler()
async def on_POST(
self, request: SynapseRequest, room_id: str
) -> Tuple[int, JsonDict]:
requester = await self._auth.get_user_by_req(request)
content = parse_json_object_from_request(request)
assert_params_in_dict(content, ("new_version",))
new_version = KNOWN_ROOM_VERSIONS.get(content["new_version"])
if new_version is None:
raise SynapseError(
400,
"Your homeserver does not support this room version",
Codes.UNSUPPORTED_ROOM_VERSION,
)
try:
async with self._worker_lock_handler.acquire_read_write_lock(
NEW_EVENT_DURING_PURGE_LOCK_NAME, room_id, write=False
):
new_room_id = await self._room_creation_handler.upgrade_room(
requester, room_id, new_version
)
except ShadowBanError:
# Generate a random room ID.
new_room_id = stringutils.random_string(18)
ret = {"replacement_room": new_room_id}
return 200, ret
def register_servlets(hs: "HomeServer", http_server: HttpServer) -> None:
RoomUpgradeRestServlet(hs).register(http_server)
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