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Implement history visibility on /messages, /context, /sync (#2511)

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* Add possibility to set history_visibility and user AccountType

* Add new DB queries

* Add actual history_visibility changes for /messages

* Add passing tests

* Extract check function

* Cleanup

* Cleanup

* Fix build on 386

* Move ApplyHistoryVisibilityFilter to internal

* Move queries to topology table

* Add filtering to /sync and /context
Some cleanup

* Add passing tests; Remove failing tests :(

* Re-add passing tests

* Move filtering to own function to avoid duplication

* Re-add passing test

* Use newly added GMSL HistoryVisibility

* Update gomatrixserverlib

* Set the visibility when creating events

* Default to shared history visibility

* Remove unused query

* Update history visibility checks to use gmsl
Update tests

* Remove unused statement

* Update migrations to set "correct" history visibility

* Add method to fetch the membership at a given event

* Tweaks and logging

* Use actual internal rsAPI, default to shared visibility in tests

* Revert "Move queries to topology table"

This reverts commit 4f0d41be9c194a46379796435ce73e79203edbd6.

* Remove noise/unneeded code

* More cleanup

* Try to optimize database requests

* Fix imports

* PR peview fixes/changes

* Move setting history visibility to own migration, be more restrictive

* Fix unit tests

* Lint

* Fix missing entries

* Tweaks for incremental syncs

* Adapt generic changes

Co-authored-by: Neil Alexander <neilalexander@users.noreply.github.com>
Co-authored-by: kegsay <kegan@matrix.org>
This commit is contained in:
Till 2022-08-11 18:23:35 +02:00 • committed by GitHub
parent 371336c6b5
commit 05cafbd197
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31 changed files with 1043 additions and 224 deletions
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123
syncapi/streams/stream_pdu.go
View file

@ -10,10 +10,13 @@ import (
"github.com/matrix-org/dendrite/internal/caching"
roomserverAPI "github.com/matrix-org/dendrite/roomserver/api"
"github.com/matrix-org/dendrite/syncapi/internal"
"github.com/matrix-org/dendrite/syncapi/storage"
"github.com/matrix-org/dendrite/syncapi/types"
userapi "github.com/matrix-org/dendrite/userapi/api"
"github.com/matrix-org/gomatrixserverlib"
"github.com/sirupsen/logrus"
"github.com/tidwall/gjson"
"go.uber.org/atomic"
@ -123,7 +126,7 @@ func (p *PDUStreamProvider) CompleteSync(
defer reqWaitGroup.Done()
jr, jerr := p.getJoinResponseForCompleteSync(
ctx, roomID, r, &stateFilter, &eventFilter, req.WantFullState, req.Device,
ctx, roomID, r, &stateFilter, &eventFilter, req.WantFullState, req.Device, false,
)
if jerr != nil {
req.Log.WithError(jerr).Error("p.getJoinResponseForCompleteSync failed")
@ -149,7 +152,7 @@ func (p *PDUStreamProvider) CompleteSync(
if !peek.Deleted {
var jr *types.JoinResponse
jr, err = p.getJoinResponseForCompleteSync(
ctx, peek.RoomID, r, &stateFilter, &eventFilter, req.WantFullState, req.Device,
ctx, peek.RoomID, r, &stateFilter, &eventFilter, req.WantFullState, req.Device, true,
)
if err != nil {
req.Log.WithError(err).Error("p.getJoinResponseForCompleteSync failed")
@ -281,12 +284,6 @@ func (p *PDUStreamProvider) addRoomDeltaToResponse(
}
}
}
if len(recentEvents) > 0 {
updateLatestPosition(recentEvents[len(recentEvents)-1].EventID())
}
if len(delta.StateEvents) > 0 {
updateLatestPosition(delta.StateEvents[len(delta.StateEvents)-1].EventID())
}
if stateFilter.LazyLoadMembers {
delta.StateEvents, err = p.lazyLoadMembers(
@ -306,6 +303,19 @@ func (p *PDUStreamProvider) addRoomDeltaToResponse(
}
}
// Applies the history visibility rules
events, err := applyHistoryVisibilityFilter(ctx, p.DB, p.rsAPI, delta.RoomID, device.UserID, eventFilter.Limit, recentEvents)
if err != nil {
logrus.WithError(err).Error("unable to apply history visibility filter")
}
if len(events) > 0 {
updateLatestPosition(events[len(events)-1].EventID())
}
if len(delta.StateEvents) > 0 {
updateLatestPosition(delta.StateEvents[len(delta.StateEvents)-1].EventID())
}
switch delta.Membership {
case gomatrixserverlib.Join:
jr := types.NewJoinResponse()
@ -313,14 +323,17 @@ func (p *PDUStreamProvider) addRoomDeltaToResponse(
p.addRoomSummary(ctx, jr, delta.RoomID, device.UserID, latestPosition)
}
jr.Timeline.PrevBatch = &prevBatch
jr.Timeline.Events = gomatrixserverlib.HeaderedToClientEvents(recentEvents, gomatrixserverlib.FormatSync)
jr.Timeline.Limited = limited
jr.Timeline.Events = gomatrixserverlib.HeaderedToClientEvents(events, gomatrixserverlib.FormatSync)
// If we are limited by the filter AND the history visibility filter
// didn't "remove" events, return that the response is limited.
jr.Timeline.Limited = limited && len(events) == len(recentEvents)
jr.State.Events = gomatrixserverlib.HeaderedToClientEvents(delta.StateEvents, gomatrixserverlib.FormatSync)
res.Rooms.Join[delta.RoomID] = *jr
case gomatrixserverlib.Peek:
jr := types.NewJoinResponse()
jr.Timeline.PrevBatch = &prevBatch
// TODO: Apply history visibility on peeked rooms
jr.Timeline.Events = gomatrixserverlib.HeaderedToClientEvents(recentEvents, gomatrixserverlib.FormatSync)
jr.Timeline.Limited = limited
jr.State.Events = gomatrixserverlib.HeaderedToClientEvents(delta.StateEvents, gomatrixserverlib.FormatSync)
@ -330,12 +343,12 @@ func (p *PDUStreamProvider) addRoomDeltaToResponse(
fallthrough // transitions to leave are the same as ban
case gomatrixserverlib.Ban:
// TODO: recentEvents may contain events that this user is not allowed to see because they are
// no longer in the room.
lr := types.NewLeaveResponse()
lr.Timeline.PrevBatch = &prevBatch
lr.Timeline.Events = gomatrixserverlib.HeaderedToClientEvents(recentEvents, gomatrixserverlib.FormatSync)
lr.Timeline.Limited = false // TODO: if len(events) >= numRecents + 1 and then set limited:true
lr.Timeline.Events = gomatrixserverlib.HeaderedToClientEvents(events, gomatrixserverlib.FormatSync)
// If we are limited by the filter AND the history visibility filter
// didn't "remove" events, return that the response is limited.
lr.Timeline.Limited = limited && len(events) == len(recentEvents)
lr.State.Events = gomatrixserverlib.HeaderedToClientEvents(delta.StateEvents, gomatrixserverlib.FormatSync)
res.Rooms.Leave[delta.RoomID] = *lr
}
@ -343,6 +356,41 @@ func (p *PDUStreamProvider) addRoomDeltaToResponse(
return latestPosition, nil
}
// applyHistoryVisibilityFilter gets the current room state and supplies it to ApplyHistoryVisibilityFilter, to make
// sure we always return the required events in the timeline.
func applyHistoryVisibilityFilter(
ctx context.Context,
db storage.Database,
rsAPI roomserverAPI.SyncRoomserverAPI,
roomID, userID string,
limit int,
recentEvents []*gomatrixserverlib.HeaderedEvent,
) ([]*gomatrixserverlib.HeaderedEvent, error) {
// We need to make sure we always include the latest states events, if they are in the timeline.
// We grep at least limit * 2 events, to ensure we really get the needed events.
stateEvents, err := db.CurrentState(ctx, roomID, &gomatrixserverlib.StateFilter{Limit: limit * 2}, nil)
if err != nil {
// Not a fatal error, we can continue without the stateEvents,
// they are only needed if there are state events in the timeline.
logrus.WithError(err).Warnf("failed to get current room state")
}
alwaysIncludeIDs := make(map[string]struct{}, len(stateEvents))
for _, ev := range stateEvents {
alwaysIncludeIDs[ev.EventID()] = struct{}{}
}
startTime := time.Now()
events, err := internal.ApplyHistoryVisibilityFilter(ctx, db, rsAPI, recentEvents, alwaysIncludeIDs, userID, "sync")
if err != nil {
return nil, err
}
logrus.WithFields(logrus.Fields{
"duration": time.Since(startTime),
"room_id": roomID,
}).Debug("applied history visibility (sync)")
return events, nil
}
func (p *PDUStreamProvider) addRoomSummary(ctx context.Context, jr *types.JoinResponse, roomID, userID string, latestPosition types.StreamPosition) {
// Work out how many members are in the room.
joinedCount, _ := p.DB.MembershipCount(ctx, roomID, gomatrixserverlib.Join, latestPosition)
@ -390,6 +438,7 @@ func (p *PDUStreamProvider) getJoinResponseForCompleteSync(
eventFilter *gomatrixserverlib.RoomEventFilter,
wantFullState bool,
device *userapi.Device,
isPeek bool,
) (jr *types.JoinResponse, err error) {
jr = types.NewJoinResponse()
// TODO: When filters are added, we may need to call this multiple times to get enough events.
@ -404,33 +453,6 @@ func (p *PDUStreamProvider) getJoinResponseForCompleteSync(
return
}
// TODO FIXME: We don't fully implement history visibility yet. To avoid leaking events which the
// user shouldn't see, we check the recent events and remove any prior to the join event of the user
// which is equiv to history_visibility: joined
joinEventIndex := -1
for i := len(recentStreamEvents) - 1; i >= 0; i-- {
ev := recentStreamEvents[i]
if ev.Type() == gomatrixserverlib.MRoomMember && ev.StateKeyEquals(device.UserID) {
membership, _ := ev.Membership()
if membership == "join" {
joinEventIndex = i
if i > 0 {
// the create event happens before the first join, so we should cut it at that point instead
if recentStreamEvents[i-1].Type() == gomatrixserverlib.MRoomCreate && recentStreamEvents[i-1].StateKeyEquals("") {
joinEventIndex = i - 1
break
}
}
break
}
}
}
if joinEventIndex != -1 {
// cut all events earlier than the join (but not the join itself)
recentStreamEvents = recentStreamEvents[joinEventIndex:]
limited = false // so clients know not to try to backpaginate
}
// Work our way through the timeline events and pick out the event IDs
// of any state events that appear in the timeline. We'll specifically
// exclude them at the next step, so that we don't get duplicate state
@ -474,6 +496,19 @@ func (p *PDUStreamProvider) getJoinResponseForCompleteSync(
recentEvents := p.DB.StreamEventsToEvents(device, recentStreamEvents)
stateEvents = removeDuplicates(stateEvents, recentEvents)
events := recentEvents
// Only apply history visibility checks if the response is for joined rooms
if !isPeek {
events, err = applyHistoryVisibilityFilter(ctx, p.DB, p.rsAPI, roomID, device.UserID, eventFilter.Limit, recentEvents)
if err != nil {
logrus.WithError(err).Error("unable to apply history visibility filter")
}
}
// If we are limited by the filter AND the history visibility filter
// didn't "remove" events, return that the response is limited.
limited = limited && len(events) == len(recentEvents)
if stateFilter.LazyLoadMembers {
if err != nil {
return nil, err
@ -488,8 +523,10 @@ func (p *PDUStreamProvider) getJoinResponseForCompleteSync(
}
jr.Timeline.PrevBatch = prevBatch
jr.Timeline.Events = gomatrixserverlib.HeaderedToClientEvents(recentEvents, gomatrixserverlib.FormatSync)
jr.Timeline.Limited = limited
jr.Timeline.Events = gomatrixserverlib.HeaderedToClientEvents(events, gomatrixserverlib.FormatSync)
// If we are limited by the filter AND the history visibility filter
// didn't "remove" events, return that the response is limited.
jr.Timeline.Limited = limited && len(events) == len(recentEvents)
jr.State.Events = gomatrixserverlib.HeaderedToClientEvents(stateEvents, gomatrixserverlib.FormatSync)
return jr, nil
}