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Add ephemeral messages support (MSC2228) (#6409)

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Implement part [MSC2228](https://github.com/matrix-org/matrix-doc/pull/2228). The parts that differ are:

* the feature is hidden behind a configuration flag (`enable_ephemeral_messages`)
* self-destruction doesn't happen for state events
* only implement support for the `m.self_destruct_after` field (not the `m.self_destruct` one)
* doesn't send synthetic redactions to clients because for this specific case we consider the clients to be able to destroy an event themselves, instead we just censor it (by pruning its JSON) in the database
This commit is contained in:
Brendan Abolivier 2019-12-03 19:19:45 +00:00 • committed by GitHub
parent 620f98b65b
commit 54dd5dc12b
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8 changed files with 379 additions and 7 deletions
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synapse/handlers/federation.py
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@ -121,6 +121,7 @@ class FederationHandler(BaseHandler):
self.pusher_pool = hs.get_pusherpool()
self.spam_checker = hs.get_spam_checker()
self.event_creation_handler = hs.get_event_creation_handler()
self._message_handler = hs.get_message_handler()
self._server_notices_mxid = hs.config.server_notices_mxid
self.config = hs.config
self.http_client = hs.get_simple_http_client()
@ -141,6 +142,8 @@ class FederationHandler(BaseHandler):
self.third_party_event_rules = hs.get_third_party_event_rules()
self._ephemeral_messages_enabled = hs.config.enable_ephemeral_messages
@defer.inlineCallbacks
def on_receive_pdu(self, origin, pdu, sent_to_us_directly=False):
""" Process a PDU received via a federation /send/ transaction, or
@ -2715,6 +2718,11 @@ class FederationHandler(BaseHandler):
event_and_contexts, backfilled=backfilled
)
if self._ephemeral_messages_enabled:
for (event, context) in event_and_contexts:
# If there's an expiry timestamp on the event, schedule its expiry.
self._message_handler.maybe_schedule_expiry(event)
if not backfilled: # Never notify for backfilled events
for event, _ in event_and_contexts:
yield self._notify_persisted_event(event, max_stream_id)