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Return a 404 from /state for an outlier #12087

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merged 8 commits into from
Mar 21, 2022
Merged

Return a 404 from /state for an outlier #12087

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e4138c1
Replace `get_state_for_pdu`
richvdh Feb 25, 2022
662c6da
Return a 404 from `/state` and `/state_ids` for an outlier
richvdh Feb 25, 2022
c09f032
Remove redundant condition
richvdh Feb 25, 2022
962da90
Rename variable
richvdh Feb 25, 2022
ba17bae
Skip conversion to list
richvdh Feb 25, 2022
2daf131
Only remove `event` if it was in the result in the first place.
richvdh Feb 25, 2022
961dfc7
newsfile
richvdh Mar 3, 2022
59273a7
Assume that the state at an event includes that event
richvdh Mar 11, 2022
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13 changes: 8 additions & 5 deletions synapse/handlers/federation.py
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Original file line number Diff line number Diff line change
Expand Up @@ -963,14 +963,17 @@ async def get_state_ids_for_pdu(self, room_id: str, event_id: str) -> List[str]:

state_map = next(iter(state_groups.values()))

if event.is_state():
# Get previous state
# we need the state *before* event.
state_key = event.get_state_key()
if (
state_key is not None
and state_map.get((event.type, state_key)) == event.event_id
):
if "replaces_state" in event.unsigned:
prev_id = event.unsigned["replaces_state"]
if prev_id != event.event_id:
state_map[(event.type, event.state_key)] = prev_id
state_map[(event.type, state_key)] = prev_id
else:
state_map.pop((event.type, event.state_key), None)
del state_map[(event.type, state_key)]

return list(state_map.values())

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