312 lines
9.4 KiB
Go
312 lines
9.4 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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"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/dendrite/clientapi/jsonerror"
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keyapi "github.com/matrix-org/dendrite/keyserver/api"
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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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"github.com/matrix-org/util"
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"github.com/prometheus/client_golang/prometheus"
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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.UserInternalAPI
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keyAPI keyapi.KeyInternalAPI
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rsAPI roomserverAPI.RoomserverInternalAPI
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lastseen sync.Map
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streams *streams.Streams
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Notifier *notifier.Notifier
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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.UserInternalAPI, keyAPI keyapi.KeyInternalAPI,
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rsAPI roomserverAPI.RoomserverInternalAPI,
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streams *streams.Streams, notifier *notifier.Notifier,
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) *RequestPool {
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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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keyAPI: keyAPI,
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rsAPI: rsAPI,
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lastseen: sync.Map{},
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streams: streams,
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Notifier: notifier,
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}
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go rp.cleanLastSeen()
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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) 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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}
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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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func init() {
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prometheus.MustRegister(
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activeSyncRequests, waitingSyncRequests,
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)
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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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return util.JSONResponse{
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Code: http.StatusBadRequest,
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JSON: jsonerror.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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waitingSyncRequests.Inc()
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defer waitingSyncRequests.Dec()
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currentPos := rp.Notifier.CurrentPosition()
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if !rp.shouldReturnImmediately(syncReq) {
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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.Response.NextBatch = syncReq.Since
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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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syncReq.Log.Debugln("Responding to sync after wake-up")
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currentPos.ApplyUpdates(userStreamListener.GetSyncPosition())
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}
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} else {
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syncReq.Log.Debugln("Responding to sync immediately")
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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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PDUPosition: rp.streams.PDUStreamProvider.CompleteSync(
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syncReq.Context, syncReq,
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),
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TypingPosition: rp.streams.TypingStreamProvider.CompleteSync(
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syncReq.Context, syncReq,
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),
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ReceiptPosition: rp.streams.ReceiptStreamProvider.CompleteSync(
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syncReq.Context, syncReq,
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),
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InvitePosition: rp.streams.InviteStreamProvider.CompleteSync(
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syncReq.Context, syncReq,
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),
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SendToDevicePosition: rp.streams.SendToDeviceStreamProvider.CompleteSync(
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syncReq.Context, syncReq,
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),
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AccountDataPosition: rp.streams.AccountDataStreamProvider.CompleteSync(
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syncReq.Context, syncReq,
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),
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DeviceListPosition: rp.streams.DeviceListStreamProvider.CompleteSync(
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syncReq.Context, syncReq,
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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: rp.streams.PDUStreamProvider.IncrementalSync(
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syncReq.Context, syncReq,
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syncReq.Since.PDUPosition, currentPos.PDUPosition,
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),
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TypingPosition: rp.streams.TypingStreamProvider.IncrementalSync(
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syncReq.Context, syncReq,
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syncReq.Since.TypingPosition, currentPos.TypingPosition,
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),
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ReceiptPosition: rp.streams.ReceiptStreamProvider.IncrementalSync(
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syncReq.Context, syncReq,
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syncReq.Since.ReceiptPosition, currentPos.ReceiptPosition,
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),
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InvitePosition: rp.streams.InviteStreamProvider.IncrementalSync(
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syncReq.Context, syncReq,
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syncReq.Since.InvitePosition, currentPos.InvitePosition,
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),
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SendToDevicePosition: rp.streams.SendToDeviceStreamProvider.IncrementalSync(
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syncReq.Context, syncReq,
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syncReq.Since.SendToDevicePosition, currentPos.SendToDevicePosition,
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),
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AccountDataPosition: rp.streams.AccountDataStreamProvider.IncrementalSync(
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syncReq.Context, syncReq,
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syncReq.Since.AccountDataPosition, currentPos.AccountDataPosition,
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),
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DeviceListPosition: rp.streams.DeviceListStreamProvider.IncrementalSync(
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syncReq.Context, syncReq,
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syncReq.Since.DeviceListPosition, currentPos.DeviceListPosition,
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),
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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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func (rp *RequestPool) OnIncomingKeyChangeRequest(req *http.Request, device *userapi.Device) util.JSONResponse {
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from := req.URL.Query().Get("from")
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to := req.URL.Query().Get("to")
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if from == "" || to == "" {
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return util.JSONResponse{
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Code: 400,
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JSON: jsonerror.InvalidArgumentValue("missing ?from= or ?to="),
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}
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}
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fromToken, err := types.NewStreamTokenFromString(from)
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if err != nil {
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return util.JSONResponse{
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Code: 400,
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JSON: jsonerror.InvalidArgumentValue("bad 'from' value"),
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}
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}
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toToken, err := types.NewStreamTokenFromString(to)
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if err != nil {
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return util.JSONResponse{
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Code: 400,
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JSON: jsonerror.InvalidArgumentValue("bad 'to' value"),
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}
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}
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syncReq, err := newSyncRequest(req, *device, rp.db)
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if err != nil {
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util.GetLogger(req.Context()).WithError(err).Error("newSyncRequest failed")
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return jsonerror.InternalServerError()
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}
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rp.streams.PDUStreamProvider.IncrementalSync(req.Context(), syncReq, fromToken.PDUPosition, toToken.PDUPosition)
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_, _, err = internal.DeviceListCatchup(
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req.Context(), rp.keyAPI, rp.rsAPI, syncReq.Device.UserID,
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syncReq.Response, fromToken.DeviceListPosition, toToken.DeviceListPosition,
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)
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if err != nil {
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util.GetLogger(req.Context()).WithError(err).Error("Failed to DeviceListCatchup info")
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return jsonerror.InternalServerError()
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}
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return util.JSONResponse{
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Code: 200,
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JSON: struct {
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Changed []string `json:"changed"`
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Left []string `json:"left"`
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}{
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Changed: syncReq.Response.DeviceLists.Changed,
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Left: syncReq.Response.DeviceLists.Left,
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},
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}
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}
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// shouldReturnImmediately returns whether the /sync request is an initial sync,
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// or timeout=0, or full_state=true, in any of the cases the request should
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// return immediately.
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func (rp *RequestPool) shouldReturnImmediately(syncReq *types.SyncRequest) bool {
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if syncReq.Since.IsEmpty() || syncReq.Timeout == 0 || syncReq.WantFullState {
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return true
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}
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return false
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}
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