diff options
Diffstat (limited to '')
-rw-r--r-- | synapse/federation/federation_client.py | 64 |
1 files changed, 55 insertions, 9 deletions
diff --git a/synapse/federation/federation_client.py b/synapse/federation/federation_client.py index 0af953a5d6..29979414e3 100644 --- a/synapse/federation/federation_client.py +++ b/synapse/federation/federation_client.py @@ -1364,13 +1364,59 @@ class FederationClient(FederationBase): return room, children, inaccessible_children - # TODO Fallback to the old federation API and translate the results. - return await self._try_destination_list( - "fetch room hierarchy", - destinations, - send_request, - failover_on_unknown_endpoint=True, - ) + try: + return await self._try_destination_list( + "fetch room hierarchy", + destinations, + send_request, + failover_on_unknown_endpoint=True, + ) + except SynapseError as e: + # Fallback to the old federation API and translate the results if + # no servers implement the new API. + # + # The algorithm below is a bit inefficient as it only attempts to + # get information for the requested room, but the legacy API may + # return additional layers. + if e.code == 502: + legacy_result = await self.get_space_summary( + destinations, + room_id, + suggested_only, + max_rooms_per_space=None, + exclude_rooms=[], + ) + + # Find the requested room in the response (and remove it). + for _i, room in enumerate(legacy_result.rooms): + if room.get("room_id") == room_id: + break + else: + # The requested room was not returned, nothing we can do. + raise + requested_room = legacy_result.rooms.pop(_i) + + # Find any children events of the requested room. + children_events = [] + children_room_ids = set() + for event in legacy_result.events: + if event.room_id == room_id: + children_events.append(event.data) + children_room_ids.add(event.state_key) + # And add them under the requested room. + requested_room["children_state"] = children_events + + # Find the children rooms. + children = [] + for room in legacy_result.rooms: + if room.get("room_id") in children_room_ids: + children.append(room) + + # It isn't clear from the response whether some of the rooms are + # not accessible. + return requested_room, children, () + + raise @attr.s(frozen=True, slots=True, auto_attribs=True) @@ -1430,7 +1476,7 @@ class FederationSpaceSummaryEventResult: class FederationSpaceSummaryResult: """Represents the data returned by a successful get_space_summary call.""" - rooms: Sequence[JsonDict] + rooms: List[JsonDict] events: Sequence[FederationSpaceSummaryEventResult] @classmethod @@ -1444,7 +1490,7 @@ class FederationSpaceSummaryResult: ValueError if d is not a valid /spaces/ response """ rooms = d.get("rooms") - if not isinstance(rooms, Sequence): + if not isinstance(rooms, List): raise ValueError("'rooms' must be a list") if any(not isinstance(r, dict) for r in rooms): raise ValueError("Invalid room in 'rooms' list") |