diff options
Diffstat (limited to 'synapse/federation/federation_server.py')
| -rw-r--r-- | synapse/federation/federation_server.py | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/synapse/federation/federation_server.py b/synapse/federation/federation_server.py index 8fbc75aa65..cce85526e7 100644 --- a/synapse/federation/federation_server.py +++ b/synapse/federation/federation_server.py @@ -110,6 +110,7 @@ class FederationServer(FederationBase): super().__init__(hs) self.handler = hs.get_federation_handler() + self.storage = hs.get_storage() self._federation_event_handler = hs.get_federation_event_handler() self.state = hs.get_state_handler() self._event_auth_handler = hs.get_event_auth_handler() @@ -200,6 +201,48 @@ class FederationServer(FederationBase): return 200, res + async def on_timestamp_to_event_request( + self, origin: str, room_id: str, timestamp: int, direction: str + ) -> Tuple[int, Dict[str, Any]]: + """When we receive a federated `/timestamp_to_event` request, + handle all of the logic for validating and fetching the event. + + Args: + origin: The server we received the event from + room_id: Room to fetch the event from + timestamp: The point in time (inclusive) we should navigate from in + the given direction to find the closest event. + direction: ["f"|"b"] to indicate whether we should navigate forward + or backward from the given timestamp to find the closest event. + + Returns: + Tuple indicating the response status code and dictionary response + body including `event_id`. + """ + with (await self._server_linearizer.queue((origin, room_id))): + origin_host, _ = parse_server_name(origin) + await self.check_server_matches_acl(origin_host, room_id) + + # We only try to fetch data from the local database + event_id = await self.store.get_event_id_for_timestamp( + room_id, timestamp, direction + ) + if event_id: + event = await self.store.get_event( + event_id, allow_none=False, allow_rejected=False + ) + + return 200, { + "event_id": event_id, + "origin_server_ts": event.origin_server_ts, + } + + raise SynapseError( + 404, + "Unable to find event from %s in direction %s" % (timestamp, direction), + errcode=Codes.NOT_FOUND, + ) + async def on_incoming_transaction( self, origin: str, |