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Merge pull request #6145 from matrix-org/erikj/fix_censored_redactions

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Fix fetching censored redactions from DB
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Erik Johnston 2019-10-02 10:57:30 +01:00 committed by GitHub
commit 35f392bb29
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3 changed files with 51 additions and 0 deletions
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1
changelog.d/6145.bugfix Normal file
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@ -0,0 +1 @@
Fix fetching censored redactions from DB, which caused APIs like initial sync to fail if it tried to include the censored redaction.

14
synapse/storage/events_worker.py
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@ -238,6 +238,20 @@ class EventsWorkerStore(SQLBaseStore):
# we have to recheck auth now.
if not allow_rejected and entry.event.type == EventTypes.Redaction:
if not hasattr(entry.event, "redacts"):
# A redacted redaction doesn't have a `redacts` key, in
# which case lets just withhold the event.
#
# Note: Most of the time if the redactions has been
# redacted we still have the un-redacted event in the DB
# and so we'll still see the `redacts` key. However, this
# isn't always true e.g. if we have censored the event.
logger.debug(
"Withholding redaction event %s as we don't have redacts key",
event_id,
)
continue
redacted_event_id = entry.event.redacts
event_map = yield self._get_events_from_cache_or_db([redacted_event_id])
original_event_entry = event_map.get(redacted_event_id)

36
tests/storage/test_redaction.py
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@ -118,6 +118,8 @@ class RedactionTestCase(unittest.HomeserverTestCase):
self.get_success(self.store.persist_event(event, context))
return event
def test_redact(self):
self.get_success(
self.inject_room_member(self.room1, self.u_alice, Membership.JOIN)
@ -361,3 +363,37 @@ class RedactionTestCase(unittest.HomeserverTestCase):
)
self.assert_dict({"content": {}}, json.loads(event_json))
def test_redact_redaction(self):
"""Tests that we can redact a redaction and can fetch it again.
"""
self.get_success(
self.inject_room_member(self.room1, self.u_alice, Membership.JOIN)
)
msg_event = self.get_success(self.inject_message(self.room1, self.u_alice, "t"))
first_redact_event = self.get_success(
self.inject_redaction(
self.room1, msg_event.event_id, self.u_alice, "Redacting message"
)
)
self.get_success(
self.inject_redaction(
self.room1,
first_redact_event.event_id,
self.u_alice,
"Redacting redaction",
)
)
# Now lets jump to the future where we have censored the redaction event
# in the DB.
self.reactor.advance(60 * 60 * 24 * 31)
# We just want to check that fetching the event doesn't raise an exception.
self.get_success(
self.store.get_event(first_redact_event.event_id, allow_none=True)
)