anonymousland-synapse/synapse/rest/client/events.py
Patrick Cloke 6bf81a7a61
Bundle aggregations outside of the serialization method. (#11612)
This makes the serialization of events synchronous (and it no
longer access the database), but we must manually calculate and
provide the bundled aggregations.

Overall this should cause no change in behavior, but is prep work
for other improvements.
2022-01-07 09:10:46 -05:00

103 lines
3.7 KiB
Python

# 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.
"""This module contains REST servlets to do with event streaming, /events."""
import logging
from typing import TYPE_CHECKING, Dict, List, Tuple, Union
from synapse.api.errors import SynapseError
from synapse.http.server import HttpServer
from synapse.http.servlet import RestServlet, parse_string
from synapse.http.site import SynapseRequest
from synapse.rest.client._base import client_patterns
from synapse.streams.config import PaginationConfig
from synapse.types import JsonDict
if TYPE_CHECKING:
from synapse.server import HomeServer
logger = logging.getLogger(__name__)
class EventStreamRestServlet(RestServlet):
PATTERNS = client_patterns("/events$", v1=True)
DEFAULT_LONGPOLL_TIME_MS = 30000
def __init__(self, hs: "HomeServer"):
super().__init__()
self.event_stream_handler = hs.get_event_stream_handler()
self.auth = hs.get_auth()
self.store = hs.get_datastore()
async def on_GET(self, request: SynapseRequest) -> Tuple[int, JsonDict]:
requester = await self.auth.get_user_by_req(request, allow_guest=True)
is_guest = requester.is_guest
args: Dict[bytes, List[bytes]] = request.args # type: ignore
if is_guest:
if b"room_id" not in args:
raise SynapseError(400, "Guest users must specify room_id param")
room_id = parse_string(request, "room_id")
pagin_config = await PaginationConfig.from_request(self.store, request)
timeout = EventStreamRestServlet.DEFAULT_LONGPOLL_TIME_MS
if b"timeout" in args:
try:
timeout = int(args[b"timeout"][0])
except ValueError:
raise SynapseError(400, "timeout must be in milliseconds.")
as_client_event = b"raw" not in args
chunk = await self.event_stream_handler.get_stream(
requester.user.to_string(),
pagin_config,
timeout=timeout,
as_client_event=as_client_event,
affect_presence=(not is_guest),
room_id=room_id,
is_guest=is_guest,
)
return 200, chunk
class EventRestServlet(RestServlet):
PATTERNS = client_patterns("/events/(?P<event_id>[^/]*)$", v1=True)
def __init__(self, hs: "HomeServer"):
super().__init__()
self.clock = hs.get_clock()
self.event_handler = hs.get_event_handler()
self.auth = hs.get_auth()
self._event_serializer = hs.get_event_client_serializer()
async def on_GET(
self, request: SynapseRequest, event_id: str
) -> Tuple[int, Union[str, JsonDict]]:
requester = await self.auth.get_user_by_req(request)
event = await self.event_handler.get_event(requester.user, None, event_id)
time_now = self.clock.time_msec()
if event:
result = self._event_serializer.serialize_event(event, time_now)
return 200, result
else:
return 404, "Event not found."
def register_servlets(hs: "HomeServer", http_server: HttpServer) -> None:
EventStreamRestServlet(hs).register(http_server)
EventRestServlet(hs).register(http_server)