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Return the previous stream token if a non-member event is a duplicate. (#8093)
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changelog.d/8093.bugfix
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1
changelog.d/8093.bugfix
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@ -0,0 +1 @@
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Return the previous stream token if a non-member event is a duplicate.
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@ -667,14 +667,14 @@ class EventCreationHandler(object):
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assert self.hs.is_mine(user), "User must be our own: %s" % (user,)
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if event.is_state():
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prev_state = await self.deduplicate_state_event(event, context)
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if prev_state is not None:
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prev_event = await self.deduplicate_state_event(event, context)
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if prev_event is not None:
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logger.info(
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"Not bothering to persist state event %s duplicated by %s",
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event.event_id,
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prev_state.event_id,
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prev_event.event_id,
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)
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return prev_state
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return await self.store.get_stream_token_for_event(prev_event.event_id)
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return await self.handle_new_client_event(
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requester=requester, event=event, context=context, ratelimit=ratelimit
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@ -682,27 +682,32 @@ class EventCreationHandler(object):
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async def deduplicate_state_event(
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self, event: EventBase, context: EventContext
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) -> None:
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) -> Optional[EventBase]:
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"""
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Checks whether event is in the latest resolved state in context.
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If so, returns the version of the event in context.
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Otherwise, returns None.
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Args:
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event: The event to check for duplication.
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context: The event context.
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Returns:
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The previous verion of the event is returned, if it is found in the
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event context. Otherwise, None is returned.
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"""
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prev_state_ids = await context.get_prev_state_ids()
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prev_event_id = prev_state_ids.get((event.type, event.state_key))
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if not prev_event_id:
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return
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return None
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prev_event = await self.store.get_event(prev_event_id, allow_none=True)
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if not prev_event:
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return
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return None
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if prev_event and event.user_id == prev_event.user_id:
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prev_content = encode_canonical_json(prev_event.content)
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next_content = encode_canonical_json(event.content)
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if prev_content == next_content:
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return prev_event
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return
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return None
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async def create_and_send_nonmember_event(
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self,
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