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Allow room creator to send MSC2716 related events in existing room versions (#10566)
* Allow room creator to send MSC2716 related events in existing room versions
Discussed at https://github.com/matrix-org/matrix-doc/pull/2716/#discussion_r682474869
Restoring `get_create_event_for_room_txn` from,
44bb3f0cf5
* Add changelog
* Stop people from trying to redact MSC2716 events in unsupported room versions
* Populate rooms.creator column for easy lookup
> From some [out of band discussion](https://matrix.to/#/!UytJQHLQYfvYWsGrGY:jki.re/$p2fKESoFst038x6pOOmsY0C49S2gLKMr0jhNMz_JJz0?via=jki.re&via=matrix.org), my plan is to use `rooms.creator`. But currently, we don't fill in `creator` for remote rooms when a user is invited to a room for example. So we need to add some code to fill in `creator` wherever we add to the `rooms` table. And also add a background update to fill in the rows missing `creator` (we can use the same logic that `get_create_event_for_room_txn` is doing by looking in the state events to get the `creator`).
>
> https://github.com/matrix-org/synapse/pull/10566#issuecomment-901616642
* Remove and switch away from get_create_event_for_room_txn
* Fix no create event being found because no state events persisted yet
* Fix and add tests for rooms creator bg update
* Populate rooms.creator field for easy lookup
Part of https://github.com/matrix-org/synapse/pull/10566
- Fill in creator whenever we insert into the rooms table
- Add background update to backfill any missing creator values
* Add changelog
* Fix usage
* Remove extra delta already included in #10697
* Don't worry about setting creator for invite
* Only iterate over rows missing the creator
See https://github.com/matrix-org/synapse/pull/10697#discussion_r695940898
* Use constant to fetch room creator field
See https://github.com/matrix-org/synapse/pull/10697#discussion_r696803029
* More protection from other random types
See https://github.com/matrix-org/synapse/pull/10697#discussion_r696806853
* Move new background update to end of list
See https://github.com/matrix-org/synapse/pull/10697#discussion_r696814181
* Fix query casing
* Fix ambiguity iterating over cursor instead of list
Fix `psycopg2.ProgrammingError: no results to fetch` error
when tests run with Postgres.
```
SYNAPSE_POSTGRES=1 SYNAPSE_TEST_LOG_LEVEL=INFO python -m twisted.trial tests.storage.databases.main.test_room
```
---
We use `txn.fetchall` because it will return the results as a
list or an empty list when there are no results.
Docs:
> `cursor` objects are iterable, so, instead of calling explicitly fetchone() in a loop, the object itself can be used:
>
> https://www.psycopg.org/docs/cursor.html#cursor-iterable
And I'm guessing iterating over a raw cursor does something weird when there are no results.
---
Test CI failure: https://github.com/matrix-org/synapse/pull/10697/checks?check_run_id=3468916530
```
tests.test_visibility.FilterEventsForServerTestCase.test_large_room
===============================================================================
[FAIL]
Traceback (most recent call last):
File "/home/runner/work/synapse/synapse/tests/storage/databases/main/test_room.py", line 85, in test_background_populate_rooms_creator_column
self.get_success(
File "/home/runner/work/synapse/synapse/tests/unittest.py", line 500, in get_success
return self.successResultOf(d)
File "/home/runner/work/synapse/synapse/.tox/py/lib/python3.9/site-packages/twisted/trial/_synctest.py", line 700, in successResultOf
self.fail(
twisted.trial.unittest.FailTest: Success result expected on <Deferred at 0x7f4022f3eb50 current result: None>, found failure result instead:
Traceback (most recent call last):
File "/home/runner/work/synapse/synapse/.tox/py/lib/python3.9/site-packages/twisted/internet/defer.py", line 701, in errback
self._startRunCallbacks(fail)
File "/home/runner/work/synapse/synapse/.tox/py/lib/python3.9/site-packages/twisted/internet/defer.py", line 764, in _startRunCallbacks
self._runCallbacks()
File "/home/runner/work/synapse/synapse/.tox/py/lib/python3.9/site-packages/twisted/internet/defer.py", line 858, in _runCallbacks
current.result = callback( # type: ignore[misc]
File "/home/runner/work/synapse/synapse/.tox/py/lib/python3.9/site-packages/twisted/internet/defer.py", line 1751, in gotResult
current_context.run(_inlineCallbacks, r, gen, status)
--- <exception caught here> ---
File "/home/runner/work/synapse/synapse/.tox/py/lib/python3.9/site-packages/twisted/internet/defer.py", line 1657, in _inlineCallbacks
result = current_context.run(
File "/home/runner/work/synapse/synapse/.tox/py/lib/python3.9/site-packages/twisted/python/failure.py", line 500, in throwExceptionIntoGenerator
return g.throw(self.type, self.value, self.tb)
File "/home/runner/work/synapse/synapse/synapse/storage/background_updates.py", line 224, in do_next_background_update
await self._do_background_update(desired_duration_ms)
File "/home/runner/work/synapse/synapse/synapse/storage/background_updates.py", line 261, in _do_background_update
items_updated = await update_handler(progress, batch_size)
File "/home/runner/work/synapse/synapse/synapse/storage/databases/main/room.py", line 1399, in _background_populate_rooms_creator_column
end = await self.db_pool.runInteraction(
File "/home/runner/work/synapse/synapse/synapse/storage/database.py", line 686, in runInteraction
result = await self.runWithConnection(
File "/home/runner/work/synapse/synapse/synapse/storage/database.py", line 791, in runWithConnection
return await make_deferred_yieldable(
File "/home/runner/work/synapse/synapse/.tox/py/lib/python3.9/site-packages/twisted/internet/defer.py", line 858, in _runCallbacks
current.result = callback( # type: ignore[misc]
File "/home/runner/work/synapse/synapse/tests/server.py", line 425, in <lambda>
d.addCallback(lambda x: function(*args, **kwargs))
File "/home/runner/work/synapse/synapse/.tox/py/lib/python3.9/site-packages/twisted/enterprise/adbapi.py", line 293, in _runWithConnection
compat.reraise(excValue, excTraceback)
File "/home/runner/work/synapse/synapse/.tox/py/lib/python3.9/site-packages/twisted/python/deprecate.py", line 298, in deprecatedFunction
return function(*args, **kwargs)
File "/home/runner/work/synapse/synapse/.tox/py/lib/python3.9/site-packages/twisted/python/compat.py", line 404, in reraise
raise exception.with_traceback(traceback)
File "/home/runner/work/synapse/synapse/.tox/py/lib/python3.9/site-packages/twisted/enterprise/adbapi.py", line 284, in _runWithConnection
result = func(conn, *args, **kw)
File "/home/runner/work/synapse/synapse/synapse/storage/database.py", line 786, in inner_func
return func(db_conn, *args, **kwargs)
File "/home/runner/work/synapse/synapse/synapse/storage/database.py", line 554, in new_transaction
r = func(cursor, *args, **kwargs)
File "/home/runner/work/synapse/synapse/synapse/storage/databases/main/room.py", line 1375, in _background_populate_rooms_creator_column_txn
for room_id, event_json in txn:
psycopg2.ProgrammingError: no results to fetch
```
* Move code not under the MSC2716 room version underneath an experimental config option
See https://github.com/matrix-org/synapse/pull/10566#issuecomment-906437909
* Add ordering to rooms creator background update
See https://github.com/matrix-org/synapse/pull/10697#discussion_r696815277
* Add comment to better document constant
See https://github.com/matrix-org/synapse/pull/10697#discussion_r699674458
* Use constant field
This commit is contained in:
Eric Eastwood
GitHub
parent
92b6ac31b2
commit
1ca70fd312
1
changelog.d/10566.feature
Normal file
1
changelog.d/10566.feature
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@ -0,0 +1 @@
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Allow room creators to send historical events specified by [MSC2716](https://github.com/matrix-org/matrix-doc/pull/2716) in existing room versions.
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@ -1023,9 +1023,15 @@ class FederationEventHandler(BaseHandler):
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return
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# Skip processing a marker event if the room version doesn't
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# support it.
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# support it or the event is not from the room creator.
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room_version = await self.store.get_room_version(marker_event.room_id)
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if not room_version.msc2716_historical:
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create_event = await self.store.get_create_event_for_room(marker_event.room_id)
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room_creator = create_event.content.get(EventContentFields.ROOM_CREATOR)
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if (
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not room_version.msc2716_historical
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or not self.hs.config.experimental.msc2716_enabled
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or marker_event.sender != room_creator
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):
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return
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logger.debug("_handle_marker_event: received %s", marker_event)
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@ -1393,6 +1393,9 @@ class EventCreationHandler:
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allow_none=True,
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)
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room_version = await self.store.get_room_version_id(event.room_id)
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room_version_obj = KNOWN_ROOM_VERSIONS[room_version]
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# we can make some additional checks now if we have the original event.
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if original_event:
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if original_event.type == EventTypes.Create:
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@ -1404,6 +1407,28 @@ class EventCreationHandler:
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if original_event.type == EventTypes.ServerACL:
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raise AuthError(403, "Redacting server ACL events is not permitted")
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# Add a little safety stop-gap to prevent people from trying to
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# redact MSC2716 related events when they're in a room version
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# which does not support it yet. We allow people to use MSC2716
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# events in existing room versions but only from the room
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# creator since it does not require any changes to the auth
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# rules and in effect, the redaction algorithm . In the
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# supported room version, we add the `historical` power level to
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# auth the MSC2716 related events and adjust the redaction
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# algorthim to keep the `historical` field around (redacting an
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# event should only strip fields which don't affect the
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# structural protocol level).
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is_msc2716_event = (
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original_event.type == EventTypes.MSC2716_INSERTION
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or original_event.type == EventTypes.MSC2716_CHUNK
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or original_event.type == EventTypes.MSC2716_MARKER
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)
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if not room_version_obj.msc2716_historical and is_msc2716_event:
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raise AuthError(
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403,
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"Redacting MSC2716 events is not supported in this room version",
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)
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prev_state_ids = await context.get_prev_state_ids()
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auth_events_ids = self._event_auth_handler.compute_auth_events(
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event, prev_state_ids, for_verification=True
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@ -1411,9 +1436,6 @@ class EventCreationHandler:
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auth_events_map = await self.store.get_events(auth_events_ids)
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auth_events = {(e.type, e.state_key): e for e in auth_events_map.values()}
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room_version = await self.store.get_room_version_id(event.room_id)
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room_version_obj = KNOWN_ROOM_VERSIONS[room_version]
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if event_auth.check_redaction(
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room_version_obj, event, auth_events=auth_events
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):
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@ -1776,10 +1776,21 @@ class PersistEventsStore:
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# Not a insertion event
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return
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# Skip processing a insertion event if the room version doesn't
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# support it.
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# Skip processing an insertion event if the room version doesn't
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# support it or the event is not from the room creator.
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room_version = self.store.get_room_version_txn(txn, event.room_id)
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if not room_version.msc2716_historical:
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room_creator = self.db_pool.simple_select_one_onecol_txn(
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txn,
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table="rooms",
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keyvalues={"room_id": event.room_id},
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retcol="creator",
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allow_none=True,
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)
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if (
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not room_version.msc2716_historical
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or not self.hs.config.experimental.msc2716_enabled
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or event.sender != room_creator
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):
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return
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next_chunk_id = event.content.get(EventContentFields.MSC2716_NEXT_CHUNK_ID)
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@ -1828,9 +1839,20 @@ class PersistEventsStore:
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return
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# Skip processing a chunk event if the room version doesn't
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# support it.
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# support it or the event is not from the room creator.
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room_version = self.store.get_room_version_txn(txn, event.room_id)
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if not room_version.msc2716_historical:
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room_creator = self.db_pool.simple_select_one_onecol_txn(
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txn,
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table="rooms",
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keyvalues={"room_id": event.room_id},
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retcol="creator",
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allow_none=True,
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)
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if (
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not room_version.msc2716_historical
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or not self.hs.config.experimental.msc2716_enabled
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or event.sender != room_creator
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):
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return
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chunk_id = event.content.get(EventContentFields.MSC2716_CHUNK_ID)
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