mirror of
https://github.com/1f349/dendrite.git
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588 lines
20 KiB
Go
588 lines
20 KiB
Go
// Copyright 2017 Vector Creations Ltd
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// Copyright 2017-2018 New Vector Ltd
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// Copyright 2019-2020 The Matrix.org Foundation C.I.C.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package sync
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import (
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"context"
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"database/sql"
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"net"
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"net/http"
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"strings"
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"sync"
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"time"
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"github.com/matrix-org/gomatrixserverlib/spec"
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"github.com/matrix-org/util"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/sirupsen/logrus"
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"github.com/matrix-org/dendrite/internal/sqlutil"
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roomserverAPI "github.com/matrix-org/dendrite/roomserver/api"
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"github.com/matrix-org/dendrite/setup/config"
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"github.com/matrix-org/dendrite/syncapi/internal"
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"github.com/matrix-org/dendrite/syncapi/notifier"
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"github.com/matrix-org/dendrite/syncapi/storage"
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"github.com/matrix-org/dendrite/syncapi/streams"
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"github.com/matrix-org/dendrite/syncapi/types"
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userapi "github.com/matrix-org/dendrite/userapi/api"
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)
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// RequestPool manages HTTP long-poll connections for /sync
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type RequestPool struct {
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db storage.Database
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cfg *config.SyncAPI
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userAPI userapi.SyncUserAPI
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rsAPI roomserverAPI.SyncRoomserverAPI
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lastseen *sync.Map
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presence *sync.Map
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streams *streams.Streams
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Notifier *notifier.Notifier
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producer PresencePublisher
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consumer PresenceConsumer
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}
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type PresencePublisher interface {
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SendPresence(userID string, presence types.Presence, statusMsg *string) error
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}
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type PresenceConsumer interface {
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EmitPresence(ctx context.Context, userID string, presence types.Presence, statusMsg *string, ts spec.Timestamp, fromSync bool)
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}
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// NewRequestPool makes a new RequestPool
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func NewRequestPool(
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db storage.Database, cfg *config.SyncAPI,
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userAPI userapi.SyncUserAPI,
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rsAPI roomserverAPI.SyncRoomserverAPI,
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streams *streams.Streams, notifier *notifier.Notifier,
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producer PresencePublisher, consumer PresenceConsumer, enableMetrics bool,
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) *RequestPool {
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if enableMetrics {
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prometheus.MustRegister(
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activeSyncRequests, waitingSyncRequests,
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)
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}
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rp := &RequestPool{
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db: db,
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cfg: cfg,
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userAPI: userAPI,
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rsAPI: rsAPI,
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lastseen: &sync.Map{},
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presence: &sync.Map{},
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streams: streams,
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Notifier: notifier,
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producer: producer,
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consumer: consumer,
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}
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go rp.cleanLastSeen()
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go rp.cleanPresence(db, time.Minute*5)
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return rp
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}
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func (rp *RequestPool) cleanLastSeen() {
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for {
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rp.lastseen.Range(func(key interface{}, _ interface{}) bool {
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rp.lastseen.Delete(key)
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return true
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})
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time.Sleep(time.Minute)
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}
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}
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func (rp *RequestPool) cleanPresence(db storage.Presence, cleanupTime time.Duration) {
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if !rp.cfg.Matrix.Presence.EnableOutbound {
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return
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}
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for {
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rp.presence.Range(func(key interface{}, v interface{}) bool {
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p := v.(types.PresenceInternal)
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if time.Since(p.LastActiveTS.Time()) > cleanupTime {
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rp.updatePresence(db, types.PresenceUnavailable.String(), p.UserID)
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rp.presence.Delete(key)
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}
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return true
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})
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time.Sleep(cleanupTime)
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}
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}
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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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if !rp.cfg.Matrix.Presence.EnableOutbound {
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return
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}
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if presence == "" {
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presence = types.PresenceOnline.String()
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}
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presenceID, ok := types.PresenceFromString(presence)
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if !ok { // this should almost never happen
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return
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}
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newPresence := types.PresenceInternal{
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Presence: presenceID,
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UserID: userID,
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LastActiveTS: spec.AsTimestamp(time.Now()),
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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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return
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}
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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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defer rp.presence.Store(userID, newPresence)
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// avoid spamming presence updates when syncing
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existingPresence, ok := rp.presence.LoadOrStore(userID, newPresence)
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if ok {
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p := existingPresence.(types.PresenceInternal)
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if p.ClientFields.Presence == newPresence.ClientFields.Presence {
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return
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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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logrus.WithError(err).Error("Unable to publish presence message from sync")
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return
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}
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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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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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if _, ok := rp.lastseen.LoadOrStore(device.UserID+device.ID, struct{}{}); ok {
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return
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}
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remoteAddr := req.RemoteAddr
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if rp.cfg.RealIPHeader != "" {
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if header := req.Header.Get(rp.cfg.RealIPHeader); header != "" {
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// TODO: Maybe this isn't great but it will satisfy both X-Real-IP
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// and X-Forwarded-For (which can be a list where the real client
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// address is the first listed address). Make more intelligent?
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addresses := strings.Split(header, ",")
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if ip := net.ParseIP(addresses[0]); ip != nil {
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remoteAddr = addresses[0]
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}
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}
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}
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lsreq := &userapi.PerformLastSeenUpdateRequest{
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UserID: device.UserID,
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DeviceID: device.ID,
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RemoteAddr: remoteAddr,
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UserAgent: req.UserAgent(),
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}
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lsres := &userapi.PerformLastSeenUpdateResponse{}
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go rp.userAPI.PerformLastSeenUpdate(req.Context(), lsreq, lsres) // nolint:errcheck
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rp.lastseen.Store(device.UserID+device.ID, time.Now())
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}
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var activeSyncRequests = prometheus.NewGauge(
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prometheus.GaugeOpts{
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Namespace: "dendrite",
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Subsystem: "syncapi",
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Name: "active_sync_requests",
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Help: "The number of sync requests that are active right now",
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},
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)
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var waitingSyncRequests = prometheus.NewGauge(
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prometheus.GaugeOpts{
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Namespace: "dendrite",
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Subsystem: "syncapi",
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Name: "waiting_sync_requests",
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Help: "The number of sync requests that are waiting to be woken by a notifier",
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},
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)
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// OnIncomingSyncRequest is called when a client makes a /sync request. This function MUST be
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// called in a dedicated goroutine for this request. This function will block the goroutine
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// until a response is ready, or it times out.
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func (rp *RequestPool) OnIncomingSyncRequest(req *http.Request, device *userapi.Device) util.JSONResponse {
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// Extract values from request
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syncReq, err := newSyncRequest(req, *device, rp.db)
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if err != nil {
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if err == types.ErrMalformedSyncToken {
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return util.JSONResponse{
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Code: http.StatusBadRequest,
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JSON: spec.InvalidParam(err.Error()),
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}
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}
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return util.JSONResponse{
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Code: http.StatusBadRequest,
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JSON: spec.Unknown(err.Error()),
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}
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}
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activeSyncRequests.Inc()
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defer activeSyncRequests.Dec()
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rp.updateLastSeen(req, device)
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rp.updatePresence(rp.db, req.FormValue("set_presence"), device.UserID)
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waitingSyncRequests.Inc()
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defer waitingSyncRequests.Dec()
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// Clean up old send-to-device messages from before this stream position.
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// This is needed to avoid sending the same message multiple times
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if err = rp.db.CleanSendToDeviceUpdates(syncReq.Context, syncReq.Device.UserID, syncReq.Device.ID, syncReq.Since.SendToDevicePosition); err != nil {
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syncReq.Log.WithError(err).Error("p.DB.CleanSendToDeviceUpdates failed")
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}
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// loop until we get some data
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for {
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startTime := time.Now()
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currentPos := rp.Notifier.CurrentPosition()
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// if the since token matches the current positions, wait via the notifier
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if !rp.shouldReturnImmediately(syncReq, currentPos) {
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timer := time.NewTimer(syncReq.Timeout) // case of timeout=0 is handled above
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defer timer.Stop()
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userStreamListener := rp.Notifier.GetListener(*syncReq)
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defer userStreamListener.Close()
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giveup := func() util.JSONResponse {
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syncReq.Log.Debugln("Responding to sync since client gave up or timeout was reached")
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syncReq.Response.NextBatch = syncReq.Since
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// We should always try to include OTKs in sync responses, otherwise clients might upload keys
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// even if that's not required. See also:
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// https://github.com/matrix-org/synapse/blob/29f06704b8871a44926f7c99e73cf4a978fb8e81/synapse/rest/client/sync.py#L276-L281
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// Only try to get OTKs if the context isn't already done.
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if syncReq.Context.Err() == nil {
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err = internal.DeviceOTKCounts(syncReq.Context, rp.userAPI, syncReq.Device.UserID, syncReq.Device.ID, syncReq.Response)
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if err != nil && err != context.Canceled {
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syncReq.Log.WithError(err).Warn("failed to get OTK counts")
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}
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}
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return util.JSONResponse{
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Code: http.StatusOK,
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JSON: syncReq.Response,
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}
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}
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select {
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case <-syncReq.Context.Done(): // Caller gave up
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return giveup()
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case <-timer.C: // Timeout reached
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return giveup()
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case <-userStreamListener.GetNotifyChannel(syncReq.Since):
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currentPos.ApplyUpdates(userStreamListener.GetSyncPosition())
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syncReq.Log.WithField("currentPos", currentPos).Debugln("Responding to sync after wake-up")
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}
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} else {
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syncReq.Log.WithField("currentPos", currentPos).Debugln("Responding to sync immediately")
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}
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withTransaction := func(from types.StreamPosition, f func(snapshot storage.DatabaseTransaction) types.StreamPosition) types.StreamPosition {
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var succeeded bool
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snapshot, err := rp.db.NewDatabaseSnapshot(req.Context())
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if err != nil {
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logrus.WithError(err).Error("Failed to acquire database snapshot for sync request")
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return from
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}
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defer func() {
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succeeded = err == nil
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sqlutil.EndTransactionWithCheck(snapshot, &succeeded, &err)
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}()
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return f(snapshot)
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}
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if syncReq.Since.IsEmpty() {
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// Complete sync
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syncReq.Response.NextBatch = types.StreamingToken{
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// Get the current DeviceListPosition first, as the currentPosition
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// might advance while processing other streams, resulting in flakey
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// tests.
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DeviceListPosition: withTransaction(
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syncReq.Since.DeviceListPosition,
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func(txn storage.DatabaseTransaction) types.StreamPosition {
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return rp.streams.DeviceListStreamProvider.CompleteSync(
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syncReq.Context, txn, syncReq,
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)
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},
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),
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PDUPosition: withTransaction(
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syncReq.Since.PDUPosition,
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func(txn storage.DatabaseTransaction) types.StreamPosition {
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return rp.streams.PDUStreamProvider.CompleteSync(
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syncReq.Context, txn, syncReq,
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)
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},
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),
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TypingPosition: withTransaction(
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syncReq.Since.TypingPosition,
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func(txn storage.DatabaseTransaction) types.StreamPosition {
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return rp.streams.TypingStreamProvider.CompleteSync(
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syncReq.Context, txn, syncReq,
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)
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},
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),
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ReceiptPosition: withTransaction(
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syncReq.Since.ReceiptPosition,
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func(txn storage.DatabaseTransaction) types.StreamPosition {
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return rp.streams.ReceiptStreamProvider.CompleteSync(
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syncReq.Context, txn, syncReq,
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)
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},
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),
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InvitePosition: withTransaction(
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syncReq.Since.InvitePosition,
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func(txn storage.DatabaseTransaction) types.StreamPosition {
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return rp.streams.InviteStreamProvider.CompleteSync(
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syncReq.Context, txn, syncReq,
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)
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},
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),
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SendToDevicePosition: withTransaction(
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syncReq.Since.SendToDevicePosition,
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func(txn storage.DatabaseTransaction) types.StreamPosition {
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return rp.streams.SendToDeviceStreamProvider.CompleteSync(
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syncReq.Context, txn, syncReq,
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)
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},
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),
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AccountDataPosition: withTransaction(
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syncReq.Since.AccountDataPosition,
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func(txn storage.DatabaseTransaction) types.StreamPosition {
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return rp.streams.AccountDataStreamProvider.CompleteSync(
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syncReq.Context, txn, syncReq,
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)
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},
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),
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NotificationDataPosition: withTransaction(
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syncReq.Since.NotificationDataPosition,
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func(txn storage.DatabaseTransaction) types.StreamPosition {
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return rp.streams.NotificationDataStreamProvider.CompleteSync(
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syncReq.Context, txn, syncReq,
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)
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},
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),
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PresencePosition: withTransaction(
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syncReq.Since.PresencePosition,
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func(txn storage.DatabaseTransaction) types.StreamPosition {
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return rp.streams.PresenceStreamProvider.CompleteSync(
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syncReq.Context, txn, syncReq,
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)
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},
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),
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}
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} else {
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// Incremental sync
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syncReq.Response.NextBatch = types.StreamingToken{
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PDUPosition: withTransaction(
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syncReq.Since.PDUPosition,
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func(txn storage.DatabaseTransaction) types.StreamPosition {
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return rp.streams.PDUStreamProvider.IncrementalSync(
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syncReq.Context, txn, syncReq,
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syncReq.Since.PDUPosition, rp.Notifier.CurrentPosition().PDUPosition,
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)
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},
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),
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TypingPosition: withTransaction(
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syncReq.Since.TypingPosition,
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func(txn storage.DatabaseTransaction) types.StreamPosition {
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return rp.streams.TypingStreamProvider.IncrementalSync(
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syncReq.Context, txn, syncReq,
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syncReq.Since.TypingPosition, rp.Notifier.CurrentPosition().TypingPosition,
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)
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},
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),
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ReceiptPosition: withTransaction(
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syncReq.Since.ReceiptPosition,
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func(txn storage.DatabaseTransaction) types.StreamPosition {
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return rp.streams.ReceiptStreamProvider.IncrementalSync(
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syncReq.Context, txn, syncReq,
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syncReq.Since.ReceiptPosition, rp.Notifier.CurrentPosition().ReceiptPosition,
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)
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},
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),
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InvitePosition: withTransaction(
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syncReq.Since.InvitePosition,
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func(txn storage.DatabaseTransaction) types.StreamPosition {
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return rp.streams.InviteStreamProvider.IncrementalSync(
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syncReq.Context, txn, syncReq,
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syncReq.Since.InvitePosition, rp.Notifier.CurrentPosition().InvitePosition,
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)
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},
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),
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SendToDevicePosition: withTransaction(
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syncReq.Since.SendToDevicePosition,
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func(txn storage.DatabaseTransaction) types.StreamPosition {
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return rp.streams.SendToDeviceStreamProvider.IncrementalSync(
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syncReq.Context, txn, syncReq,
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syncReq.Since.SendToDevicePosition, rp.Notifier.CurrentPosition().SendToDevicePosition,
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)
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},
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),
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AccountDataPosition: withTransaction(
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syncReq.Since.AccountDataPosition,
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func(txn storage.DatabaseTransaction) types.StreamPosition {
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return rp.streams.AccountDataStreamProvider.IncrementalSync(
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syncReq.Context, txn, syncReq,
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syncReq.Since.AccountDataPosition, rp.Notifier.CurrentPosition().AccountDataPosition,
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)
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},
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),
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NotificationDataPosition: withTransaction(
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syncReq.Since.NotificationDataPosition,
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func(txn storage.DatabaseTransaction) types.StreamPosition {
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return rp.streams.NotificationDataStreamProvider.IncrementalSync(
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syncReq.Context, txn, syncReq,
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syncReq.Since.NotificationDataPosition, rp.Notifier.CurrentPosition().NotificationDataPosition,
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)
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},
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),
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DeviceListPosition: withTransaction(
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syncReq.Since.DeviceListPosition,
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func(txn storage.DatabaseTransaction) types.StreamPosition {
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return rp.streams.DeviceListStreamProvider.IncrementalSync(
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syncReq.Context, txn, syncReq,
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syncReq.Since.DeviceListPosition, rp.Notifier.CurrentPosition().DeviceListPosition,
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)
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},
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),
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PresencePosition: withTransaction(
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syncReq.Since.PresencePosition,
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func(txn storage.DatabaseTransaction) types.StreamPosition {
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return rp.streams.PresenceStreamProvider.IncrementalSync(
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syncReq.Context, txn, syncReq,
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syncReq.Since.PresencePosition, rp.Notifier.CurrentPosition().PresencePosition,
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)
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},
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),
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}
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// it's possible for there to be no updates for this user even though since < current pos,
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// e.g busy servers with a quiet user. In this scenario, we don't want to return a no-op
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// response immediately, so let's try this again but pretend they bumped their since token.
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// If the incremental sync was processed very quickly then we expect the next loop to block
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// with a notifier, but if things are slow it's entirely possible that currentPos is no
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// longer the current position so we will hit this code path again. We need to do this and
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// not return a no-op response because:
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// - It's an inefficient use of bandwidth.
|
|
// - Some sytests which test 'waking up' sync rely on some sync requests to block, which
|
|
// they weren't always doing, resulting in flakey tests.
|
|
if !syncReq.Response.HasUpdates() {
|
|
syncReq.Since = currentPos
|
|
// do not loop again if the ?timeout= is 0 as that means "return immediately"
|
|
if syncReq.Timeout > 0 {
|
|
syncReq.Timeout = syncReq.Timeout - time.Since(startTime)
|
|
if syncReq.Timeout < 0 {
|
|
syncReq.Timeout = 0
|
|
}
|
|
continue
|
|
}
|
|
}
|
|
}
|
|
|
|
return util.JSONResponse{
|
|
Code: http.StatusOK,
|
|
JSON: syncReq.Response,
|
|
}
|
|
}
|
|
}
|
|
|
|
func (rp *RequestPool) OnIncomingKeyChangeRequest(req *http.Request, device *userapi.Device) util.JSONResponse {
|
|
from := req.URL.Query().Get("from")
|
|
to := req.URL.Query().Get("to")
|
|
if from == "" || to == "" {
|
|
return util.JSONResponse{
|
|
Code: 400,
|
|
JSON: spec.InvalidParam("missing ?from= or ?to="),
|
|
}
|
|
}
|
|
fromToken, err := types.NewStreamTokenFromString(from)
|
|
if err != nil {
|
|
return util.JSONResponse{
|
|
Code: 400,
|
|
JSON: spec.InvalidParam("bad 'from' value"),
|
|
}
|
|
}
|
|
toToken, err := types.NewStreamTokenFromString(to)
|
|
if err != nil {
|
|
return util.JSONResponse{
|
|
Code: 400,
|
|
JSON: spec.InvalidParam("bad 'to' value"),
|
|
}
|
|
}
|
|
syncReq, err := newSyncRequest(req, *device, rp.db)
|
|
if err != nil {
|
|
util.GetLogger(req.Context()).WithError(err).Error("newSyncRequest failed")
|
|
return util.JSONResponse{
|
|
Code: http.StatusInternalServerError,
|
|
JSON: spec.InternalServerError{},
|
|
}
|
|
}
|
|
snapshot, err := rp.db.NewDatabaseSnapshot(req.Context())
|
|
if err != nil {
|
|
logrus.WithError(err).Error("Failed to acquire database snapshot for key change")
|
|
return util.JSONResponse{
|
|
Code: http.StatusInternalServerError,
|
|
JSON: spec.InternalServerError{},
|
|
}
|
|
}
|
|
var succeeded bool
|
|
defer sqlutil.EndTransactionWithCheck(snapshot, &succeeded, &err)
|
|
rp.streams.PDUStreamProvider.IncrementalSync(req.Context(), snapshot, syncReq, fromToken.PDUPosition, toToken.PDUPosition)
|
|
_, _, err = internal.DeviceListCatchup(
|
|
req.Context(), snapshot, rp.userAPI, rp.rsAPI, syncReq.Device.UserID,
|
|
syncReq.Response, fromToken.DeviceListPosition, toToken.DeviceListPosition,
|
|
)
|
|
if err != nil {
|
|
util.GetLogger(req.Context()).WithError(err).Error("Failed to DeviceListCatchup info")
|
|
return util.JSONResponse{
|
|
Code: http.StatusInternalServerError,
|
|
JSON: spec.InternalServerError{},
|
|
}
|
|
}
|
|
succeeded = true
|
|
return util.JSONResponse{
|
|
Code: 200,
|
|
JSON: struct {
|
|
Changed []string `json:"changed"`
|
|
Left []string `json:"left"`
|
|
}{
|
|
Changed: syncReq.Response.DeviceLists.Changed,
|
|
Left: syncReq.Response.DeviceLists.Left,
|
|
},
|
|
}
|
|
}
|
|
|
|
// shouldReturnImmediately returns whether the /sync request is an initial sync,
|
|
// or timeout=0, or full_state=true, in any of the cases the request should
|
|
// return immediately.
|
|
func (rp *RequestPool) shouldReturnImmediately(syncReq *types.SyncRequest, currentPos types.StreamingToken) bool {
|
|
if currentPos.IsAfter(syncReq.Since) || syncReq.Timeout == 0 || syncReq.WantFullState {
|
|
return true
|
|
}
|
|
return false
|
|
}
|