Previously we were mashing everything together as RoomAccountDataEvent,
even the global events. This technically worked, because of the hidden
custom fields on the ruma event types, but it's confusing and easy to
mess up. Separate methods with appropriate types are preferable.
Previously, read receipts would only be forwarded via federation
incidentally when some PDU was later sent to the destination server.
Trigger a send without any event to collect EDUs and get read receipts
out directly.
Previously we required every alias in a canonical alias event sent by a
client to be valid, and would only validate local aliases. This
prevented clients from adding/removing canonical aliases if there were
existing remote or invalid aliases.
Previously, we would only attempt to validate the aliases in the event
content if we were able to parse the event, and would silently allow it
otherwise.
The previous logic would increment the backoff counter both when a
request actually fails and when we do not make a request because the
server was already in backoff. This lead to a positive feedback loop
where every request made while a server is in backoff increases the
backoff delay, making it impossible to recover from backoff unless the
entire backoff delay elapses with zero requests.
Failing to reset the backoff state resulted in a monotonically
increasing backoff delay. If a remote server was temporarily
unavailable, we would have a persistently increased rate of key query
failures until the backoff state was reset by a server restart. If
enough key queries were attempted while the remote was unavailable, it
can accumulate an arbitrarily long backoff delay and effectively block
all future key queries to this server.
This is pure code-motion, with no behavior changes. The new structure
will make it easier to fix the backoff behavior, and makes the code
somewhat less of a nightmare to follow.
This became a problem because #foundation-office:matrix.org has a
malformed create event with its `predecessor` set to a string instead of
a map.
The solution to this is, unfortunately, to do more shotgun parsing to
extract only the desired fields rather than trying to parse the entire
content every time. To prevent this kind of problem from happening
again, `RoomCreateEventContent` must only be used for creating new PDUs,
existing PDUs must be shotgun-parsed.
If all join requests to resident servers fail or if the joining server
is the only resident server (i.e. the room is local-only), we would
previously send a 500 error, even if the more correct response would be
M_UNAUTHORIZED (e.g. if the user tries to join an invite-only room).
To fix this, we now return the error generated by attempting the join
locally, which correctly informs the client about why their request
failed.
Fixes a set of bugs introduced by 00b77144c1,
where we replaced explicit `RoomVersionId` matches with `version < V11`
comparisons. The `Ord` impl on `RoomVersionId` does not work like that,
and is in fact a lexicographic string comparison[1]. The most visible
effect of these bugs is that incoming redaction events would sometimes
be ignored.
Instead of reverting to the explicit matches, which were quite verbose,
I implemented a `RoomVersion` struct that has flags for each property
that we care about. This is similar to the approach used by ruma[2] and
synapse[3].
[1]: 7cfa3be0c6/crates/ruma-common/src/identifiers/room_version_id.rs (L136)
[2]: 7cfa3be0c6/crates/ruma-state-res/src/room_version.rs
[3]: c856ae4724/synapse/api/room_versions.py
