hoernschen/dendrite
1
0
Fork 0
mirror of https://github.com/hoernschen/dendrite.git synced 2025-07-29 12:42:46 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

Finish implementing redactions (#1189)

Browse source 
* Add a bit more logging to the fedsender

* bugfix: continue sending PDUs if ones are added whilst sending another PDU

Without this, the queue goes back to sleep on `<-oq.notifyPDUs` which won't
fire because `pendingPDUs` is already > 0. This should fix a flakey sytest.

* Break if no txn is sent

* WIP syncapi work

* More debugging

* Bump GMSL version to pull in working Event.Redact

* Remove logging

* Make redactions work on v3+

* Fix more tests
This commit is contained in:
Kegsay 2020-07-08 17:45:39 +01:00 • committed by GitHub
parent a5a51b4141
commit d9648b0615
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
14 changed files with 131 additions and 25 deletions
Download patch file Download diff file Expand all files Collapse all files

16
roomserver/api/output.go
View file

@ -29,6 +29,22 @@ const (
// OutputTypeRetireInviteEvent indicates that the event is an OutputRetireInviteEvent
OutputTypeRetireInviteEvent OutputType = "retire_invite_event"
// OutputTypeRedactedEvent indicates that the event is an OutputRedactedEvent
//
// This event is emitted when a redaction has been 'validated' (meaning both the redaction and the event to redact are known).
// Redaction validation happens when the roomserver receives either:
// - A redaction for which we have the event to redact.
// - Any event for which we have a redaction.
// When the roomserver receives an event, it will check against the redactions table to see if there is a matching redaction
// for the event. If there is, it will mark the redaction as validated and emit this event. In the common case of a redaction
// happening after receiving the event to redact, the roomserver will emit a OutputTypeNewRoomEvent of m.room.redaction
// immediately followed by a OutputTypeRedactedEvent. In the uncommon case of receiving the redaction BEFORE the event to redact,
// the roomserver will emit a OutputTypeNewRoomEvent of the event to redact immediately followed by a OutputTypeRedactedEvent.
//
// In order to honour redactions correctly, downstream components must ignore m.room.redaction events emitted via OutputTypeNewRoomEvent.
// When downstream components receive an OutputTypeRedactedEvent they must:
// - Pull out the event to redact from the database. They should have this because the redaction is validated.
// - Redact the event and set the corresponding `unsigned` fields to indicate it as redacted.
// - Replace the event in the database.
OutputTypeRedactedEvent OutputType = "redacted_event"
)

11
roomserver/internal/query.go
View file

@ -20,6 +20,7 @@ import (
"context"
"fmt"
"github.com/matrix-org/dendrite/internal/eventutil"
"github.com/matrix-org/dendrite/roomserver/api"
"github.com/matrix-org/dendrite/roomserver/auth"
"github.com/matrix-org/dendrite/roomserver/state"
@ -867,7 +868,7 @@ func getAuthChain(
func persistEvents(ctx context.Context, db storage.Database, events []gomatrixserverlib.HeaderedEvent) (types.RoomNID, map[string]types.Event) {
var roomNID types.RoomNID
backfilledEventMap := make(map[string]types.Event)
for _, ev := range events {
for j, ev := range events {
nidMap, err := db.EventNIDs(ctx, ev.AuthEventIDs())
if err != nil { // this shouldn't happen as RequestBackfill already found them
logrus.WithError(err).WithField("auth_events", ev.AuthEventIDs()).Error("Failed to find one or more auth events")
@ -891,12 +892,14 @@ func persistEvents(ctx context.Context, db storage.Database, events []gomatrixse
// It's also possible for this event to be a redaction which results in another event being
// redacted, which we don't care about since we aren't returning it in this backfill.
if redactedEventID == ev.EventID() {
ev = ev.Redact().Headered(ev.RoomVersion)
err = ev.SetUnsignedField("redacted_because", redactionEvent)
eventToRedact := ev.Unwrap()
redactedEvent, err := eventutil.RedactEvent(redactionEvent, &eventToRedact)
if err != nil {
logrus.WithError(err).WithField("event_id", ev.EventID()).Error("Failed to set unsigned field")
logrus.WithError(err).WithField("event_id", ev.EventID()).Error("Failed to redact event")
continue
}
ev = redactedEvent.Headered(ev.RoomVersion)
events[j] = ev
}
backfilledEventMap[ev.EventID()] = types.Event{
EventNID: stateAtEvent.StateEntry.EventNID,

4
roomserver/storage/shared/storage.go
View file

@ -563,6 +563,10 @@ func (d *Database) handleRedactions(
// we've seen this redaction before or there is nothing to redact
return nil, "", nil
}
if redactedEvent.RoomID() != redactionEvent.RoomID() {
// redactions across rooms aren't allowed
return nil, "", nil
}
// mark the event as redacted
err = redactedEvent.SetUnsignedField("redacted_because", redactionEvent)