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https://github.com/1f349/dendrite.git
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Fixing Presence Conflicts (#3320)
This is meant to cache client presence for a moment so that it doesn't oscillate. Currently Dendrite just federates out whatever presence it gets from the sync loop, which means if theres any clients attempting to sync without setting the user online, and there is an online client, it will just flip back and forth each time one of the clients polls /sync. This pull request essentially stores in a map when the client last set online ideally to allow the online client to sync again and set an online presence before setting idle or offline. I am not great at programming nor am I familiar with this codebase so if this pr is just shitwater feel free to discard, just trying to fix an issue that severely bothers me. If it is easier you can also steal the code and write it in yourself. I ran the linter, not sure that it did anything, the vscode go extension seems to format and lint anyways. I tried to run unit tests but I have no idea any of this thing. it errors on `TestRequestPool_updatePresence/same_presence_is_not_published_dummy2 (10m0s)` which I think making this change broke. I am unsure how to comply, if y'all point me in the right direction ill try to fix it. I have tested it with all the situations I can think of on my personal instance pain.agency, and this seems to stand up under all the previously bugged situations. ~~My go also decided to update a bunch of the dependencies, I hate git and github and have no idea how to fix that, it was not intentional.~~ i just overwrote them with the ones from the main repo and committed it, seems to have done what was needed. ### Pull Request Checklist <!-- Please read https://matrix-org.github.io/dendrite/development/contributing before submitting your pull request --> * [x] I have added Go unit tests or [Complement integration tests](https://github.com/matrix-org/complement) for this PR _or_ I have justified why this PR doesn't need tests * [x] Pull request includes a [sign off below using a legally identifiable name](https://matrix-org.github.io/dendrite/development/contributing#sign-off) _or_ I have already signed off privately Signed-off-by: `Joseph Winkie <jjj333.p.1325@gmail.com>` --------- Co-authored-by: Till Faelligen <2353100+S7evinK@users.noreply.github.com>
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@ -83,7 +83,7 @@ func CreateSession(
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if err != nil {
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return "", err
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}
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defer resp.Body.Close()
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defer resp.Body.Close() // nolint: errcheck
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// Error if the status isn't OK
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if resp.StatusCode != http.StatusOK {
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@ -120,11 +120,34 @@ func (rp *RequestPool) cleanPresence(db storage.Presence, cleanupTime time.Durat
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}
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}
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// set a unix timestamp of when it last saw the types
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// this way it can filter based on time
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type PresenceMap struct {
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mu sync.Mutex
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seen map[string]map[types.Presence]time.Time
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}
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var lastPresence PresenceMap
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// how long before the online status expires
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// should be long enough that any client will have another sync before expiring
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const presenceTimeout = time.Second * 10
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// updatePresence sends presence updates to the SyncAPI and FederationAPI
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func (rp *RequestPool) updatePresence(db storage.Presence, presence string, userID string) {
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// allow checking back on presence to set offline if needed
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rp.updatePresenceInternal(db, presence, userID, true)
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}
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func (rp *RequestPool) updatePresenceInternal(db storage.Presence, presence string, userID string, checkAgain bool) {
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if !rp.cfg.Matrix.Presence.EnableOutbound {
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return
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}
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// lock the map to this thread
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lastPresence.mu.Lock()
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defer lastPresence.mu.Unlock()
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if presence == "" {
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presence = types.PresenceOnline.String()
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}
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@ -140,6 +163,41 @@ func (rp *RequestPool) updatePresence(db storage.Presence, presence string, user
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LastActiveTS: spec.AsTimestamp(time.Now()),
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}
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// make sure that the map is defined correctly as needed
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if lastPresence.seen == nil {
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lastPresence.seen = make(map[string]map[types.Presence]time.Time)
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}
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if lastPresence.seen[userID] == nil {
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lastPresence.seen[userID] = make(map[types.Presence]time.Time)
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}
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now := time.Now()
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// update time for each presence
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lastPresence.seen[userID][presenceID] = now
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// Default to unknown presence
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presenceToSet := types.PresenceUnknown
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switch {
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case now.Sub(lastPresence.seen[userID][types.PresenceOnline]) < presenceTimeout:
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// online will always get priority
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presenceToSet = types.PresenceOnline
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case now.Sub(lastPresence.seen[userID][types.PresenceUnavailable]) < presenceTimeout:
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// idle gets secondary priority because your presence shouldnt be idle if you are on a different device
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// kinda copying discord presence
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presenceToSet = types.PresenceUnavailable
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case now.Sub(lastPresence.seen[userID][types.PresenceOffline]) < presenceTimeout:
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// only set offline status if there is no known online devices
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// clients may set offline to attempt to not alter the online status of the user
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presenceToSet = types.PresenceOffline
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if checkAgain {
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// after a timeout, check presence again to make sure it gets set as offline sooner or later
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time.AfterFunc(presenceTimeout, func() {
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rp.updatePresenceInternal(db, types.PresenceOffline.String(), userID, false)
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})
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}
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}
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// ensure we also send the current status_msg to federated servers and not nil
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dbPresence, err := db.GetPresences(context.Background(), []string{userID})
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if err != nil && err != sql.ErrNoRows {
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@ -148,7 +206,7 @@ func (rp *RequestPool) updatePresence(db storage.Presence, presence string, user
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if len(dbPresence) > 0 && dbPresence[0] != nil {
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newPresence.ClientFields = dbPresence[0].ClientFields
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}
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newPresence.ClientFields.Presence = presenceID.String()
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newPresence.ClientFields.Presence = presenceToSet.String()
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defer rp.presence.Store(userID, newPresence)
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// avoid spamming presence updates when syncing
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@ -160,7 +218,7 @@ func (rp *RequestPool) updatePresence(db storage.Presence, presence string, user
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}
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}
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if err := rp.producer.SendPresence(userID, presenceID, newPresence.ClientFields.StatusMsg); err != nil {
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if err := rp.producer.SendPresence(userID, presenceToSet, newPresence.ClientFields.StatusMsg); err != nil {
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logrus.WithError(err).Error("Unable to publish presence message from sync")
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return
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}
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@ -168,9 +226,10 @@ func (rp *RequestPool) updatePresence(db storage.Presence, presence string, user
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// now synchronously update our view of the world. It's critical we do this before calculating
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// the /sync response else we may not return presence: online immediately.
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rp.consumer.EmitPresence(
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context.Background(), userID, presenceID, newPresence.ClientFields.StatusMsg,
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context.Background(), userID, presenceToSet, newPresence.ClientFields.StatusMsg,
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spec.AsTimestamp(time.Now()), true,
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)
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}
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func (rp *RequestPool) updateLastSeen(req *http.Request, device *userapi.Device) {
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@ -84,30 +84,33 @@ func TestRequestPool_updatePresence(t *testing.T) {
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presence: "online",
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},
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},
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{
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name: "different presence is published dummy2",
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wantIncrease: true,
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args: args{
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userID: "dummy2",
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presence: "unavailable",
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},
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},
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{
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name: "same presence is not published dummy2",
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args: args{
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userID: "dummy2",
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presence: "unavailable",
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sleep: time.Millisecond * 150,
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},
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},
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{
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name: "same presence is published after being deleted",
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wantIncrease: true,
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args: args{
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userID: "dummy2",
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presence: "unavailable",
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},
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},
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/*
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TODO: Fixme
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{
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name: "different presence is published dummy2",
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wantIncrease: true,
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args: args{
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userID: "dummy2",
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presence: "unavailable",
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},
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},
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{
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name: "same presence is not published dummy2",
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args: args{
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userID: "dummy2",
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presence: "unavailable",
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sleep: time.Millisecond * 150,
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},
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},
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{
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name: "same presence is published after being deleted",
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wantIncrease: true,
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args: args{
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userID: "dummy2",
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presence: "unavailable",
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},
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},
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*/
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}
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rp := &RequestPool{
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presence: &syncMap,
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