diff --git a/synapse/handlers/room.py b/synapse/handlers/room.py
index cc1e5c8f97..de97886ea9 100644
--- a/synapse/handlers/room.py
+++ b/synapse/handlers/room.py
@@ -49,7 +49,6 @@ from synapse.api.constants import (
from synapse.api.errors import (
AuthError,
Codes,
- HttpResponseException,
LimitExceededError,
NotFoundError,
StoreError,
@@ -60,7 +59,6 @@ from synapse.api.room_versions import KNOWN_ROOM_VERSIONS, RoomVersion
from synapse.event_auth import validate_event_for_room_version
from synapse.events import EventBase
from synapse.events.utils import copy_and_fixup_power_levels_contents
-from synapse.federation.federation_client import InvalidResponseError
from synapse.handlers.relations import BundledAggregations
from synapse.module_api import NOT_SPAM
from synapse.rest.admin._base import assert_user_is_admin
@@ -1472,7 +1470,12 @@ class TimestampLookupHandler:
Raises:
SynapseError if unable to find any event locally in the given direction
"""
-
+ logger.debug(
+ "get_event_for_timestamp(room_id=%s, timestamp=%s, direction=%s) Finding closest event...",
+ room_id,
+ timestamp,
+ direction,
+ )
local_event_id = await self.store.get_event_id_for_timestamp(
room_id, timestamp, direction
)
@@ -1524,85 +1527,54 @@ class TimestampLookupHandler:
)
)
- # Loop through each homeserver candidate until we get a succesful response
- for domain in likely_domains:
- # We don't want to ask our own server for information we don't have
- if domain == self.server_name:
- continue
+ remote_response = await self.federation_client.timestamp_to_event(
+ destinations=likely_domains,
+ room_id=room_id,
+ timestamp=timestamp,
+ direction=direction,
+ )
+ if remote_response is not None:
+ logger.debug(
+ "get_event_for_timestamp: remote_response=%s",
+ remote_response,
+ )
- try:
- remote_response = await self.federation_client.timestamp_to_event(
- domain, room_id, timestamp, direction
- )
- logger.debug(
- "get_event_for_timestamp: response from domain(%s)=%s",
- domain,
- remote_response,
- )
+ remote_event_id = remote_response.event_id
+ remote_origin_server_ts = remote_response.origin_server_ts
- remote_event_id = remote_response.event_id
- remote_origin_server_ts = remote_response.origin_server_ts
-
- # Backfill this event so we can get a pagination token for
- # it with `/context` and paginate `/messages` from this
- # point.
- #
- # TODO: The requested timestamp may lie in a part of the
- # event graph that the remote server *also* didn't have,
- # in which case they will have returned another event
- # which may be nowhere near the requested timestamp. In
- # the future, we may need to reconcile that gap and ask
- # other homeservers, and/or extend `/timestamp_to_event`
- # to return events on *both* sides of the timestamp to
- # help reconcile the gap faster.
- remote_event = (
- await self.federation_event_handler.backfill_event_id(
- domain, room_id, remote_event_id
- )
- )
+ # Backfill this event so we can get a pagination token for
+ # it with `/context` and paginate `/messages` from this
+ # point.
+ pulled_pdu_info = await self.federation_event_handler.backfill_event_id(
+ likely_domains, room_id, remote_event_id
+ )
+ remote_event = pulled_pdu_info.pdu
- # XXX: When we see that the remote server is not trustworthy,
- # maybe we should not ask them first in the future.
- if remote_origin_server_ts != remote_event.origin_server_ts:
- logger.info(
- "get_event_for_timestamp: Remote server (%s) claimed that remote_event_id=%s occured at remote_origin_server_ts=%s but that isn't true (actually occured at %s). Their claims are dubious and we should consider not trusting them.",
- domain,
- remote_event_id,
- remote_origin_server_ts,
- remote_event.origin_server_ts,
- )
-
- # Only return the remote event if it's closer than the local event
- if not local_event or (
- abs(remote_event.origin_server_ts - timestamp)
- < abs(local_event.origin_server_ts - timestamp)
- ):
- logger.info(
- "get_event_for_timestamp: returning remote_event_id=%s (%s) since it's closer to timestamp=%s than local_event=%s (%s)",
- remote_event_id,
- remote_event.origin_server_ts,
- timestamp,
- local_event.event_id if local_event else None,
- local_event.origin_server_ts if local_event else None,
- )
- return remote_event_id, remote_origin_server_ts
- except (HttpResponseException, InvalidResponseError) as ex:
- # Let's not put a high priority on some other homeserver
- # failing to respond or giving a random response
- logger.debug(
- "get_event_for_timestamp: Failed to fetch /timestamp_to_event from %s because of exception(%s) %s args=%s",
- domain,
- type(ex).__name__,
- ex,
- ex.args,
+ # XXX: When we see that the remote server is not trustworthy,
+ # maybe we should not ask them first in the future.
+ if remote_origin_server_ts != remote_event.origin_server_ts:
+ logger.info(
+ "get_event_for_timestamp: Remote server (%s) claimed that remote_event_id=%s occured at remote_origin_server_ts=%s but that isn't true (actually occured at %s). Their claims are dubious and we should consider not trusting them.",
+ pulled_pdu_info.pull_origin,
+ remote_event_id,
+ remote_origin_server_ts,
+ remote_event.origin_server_ts,
)
- except Exception:
- # But we do want to see some exceptions in our code
- logger.warning(
- "get_event_for_timestamp: Failed to fetch /timestamp_to_event from %s because of exception",
- domain,
- exc_info=True,
+
+ # Only return the remote event if it's closer than the local event
+ if not local_event or (
+ abs(remote_event.origin_server_ts - timestamp)
+ < abs(local_event.origin_server_ts - timestamp)
+ ):
+ logger.info(
+ "get_event_for_timestamp: returning remote_event_id=%s (%s) since it's closer to timestamp=%s than local_event=%s (%s)",
+ remote_event_id,
+ remote_event.origin_server_ts,
+ timestamp,
+ local_event.event_id if local_event else None,
+ local_event.origin_server_ts if local_event else None,
)
+ return remote_event_id, remote_origin_server_ts
# To appease mypy, we have to add both of these conditions to check for
# `None`. We only expect `local_event` to be `None` when
|
