webrtc: return 404 when a stream is not present (#1805)

README.md

@@ -4,7 +4,7 @@
 
 <br>
 
-_MediaMTX_/ [_rtsp-simple-server_](#note-about-rtsp-simple-server) is a ready-to-use and zero-dependency server and proxy that allows users to publish, read and proxy live video and audio streams.
+_MediaMTX_ / [_rtsp-simple-server_](#note-about-rtsp-simple-server) is a ready-to-use and zero-dependency server and proxy that allows users to publish, read and proxy live video and audio streams.
 
 Live streams can be published to the server with:
 

go.mod

@@ -8,7 +8,7 @@ require (
 	github.com/alecthomas/kong v0.7.1
 	github.com/asticode/go-astits v1.11.0
 	github.com/bluenviron/gohlslib v0.2.4
-	github.com/bluenviron/gortsplib/v3 v3.6.1
+	github.com/bluenviron/gortsplib/v3 v3.6.2
 	github.com/bluenviron/mediacommon v0.5.0
 	github.com/fsnotify/fsnotify v1.6.0
 	github.com/gin-gonic/gin v1.9.0

go.sum

@@ -12,8 +12,8 @@ github.com/asticode/go-astits v1.11.0 h1:GTHUXht0ZXAJXsVbsLIcyfHr1Bchi4QQwMARw2Z
 github.com/asticode/go-astits v1.11.0/go.mod h1:QSHmknZ51pf6KJdHKZHJTLlMegIrhega3LPWz3ND/iI=
 github.com/bluenviron/gohlslib v0.2.4 h1:I0J6b9jVSYWL8paaC/h/r8Fyrq6SQSQj2DGnhHSi4K4=
 github.com/bluenviron/gohlslib v0.2.4/go.mod h1:PghpVEkRW003EqzSny2mUhl/5w7R0w9aAYgTIRCoaTg=
-github.com/bluenviron/gortsplib/v3 v3.6.1 h1:+/kPiwmdRwUasU5thOBATJQ4/yD+vrIEutJyRTB/f+0=
-github.com/bluenviron/gortsplib/v3 v3.6.1/go.mod h1:gc6Z8pBUMC9QBqYxcOY9eVxjDPOrmFcwVH61Xs3Gu2A=
+github.com/bluenviron/gortsplib/v3 v3.6.2 h1:rbMcohs6h3HwToJAyYcvUJm/m3PzWK5bYkNLZPVkjF8=
+github.com/bluenviron/gortsplib/v3 v3.6.2/go.mod h1:U9oODQzfy3xHaWUScGwcGUHxAQWr4b7FpAo7qzu+REE=
 github.com/bluenviron/mediacommon v0.5.0 h1:YsVFlEknaXWhZGfz+Y1QbuzXLMVSmHODc7OnRqZoITY=
 github.com/bluenviron/mediacommon v0.5.0/go.mod h1:t0dqPsWUTchyvib0MhixIwXEgvDX4V9G+I0GzWLQRb8=
 github.com/bytedance/sonic v1.5.0/go.mod h1:ED5hyg4y6t3/9Ku1R6dU/4KyJ48DZ4jPhfY1O2AihPM=

internal/core/webrtc_http_server.go

@@ -109,7 +109,7 @@ func marshalICEFragment(offer *webrtc.SessionDescription, candidates []*webrtc.I
 type webRTCHTTPServerParent interface {
 	logger.Writer
 	genICEServers() []webrtc.ICEServer
-	sessionNew(req webRTCSessionNewReq) webRTCNewSessionRes
+	sessionNew(req webRTCSessionNewReq) webRTCSessionNewRes
 	sessionAddCandidates(req webRTCSessionAddCandidatesReq) webRTCSessionAddCandidatesRes
 }
 
@@ -315,7 +315,9 @@ func (s *webRTCHTTPServer) onRequest(ctx *gin.Context) {
 				videoBitrate: ctx.Query("video_bitrate"),
 			})
 			if res.err != nil {
-				ctx.Writer.WriteHeader(http.StatusInternalServerError)
+				if res.errStatusCode != 0 {
+					ctx.Writer.WriteHeader(res.errStatusCode)
+				}
 				return
 			}
 

internal/core/webrtc_manager.go

@@ -8,6 +8,7 @@ import (
 	"fmt"
 	"math/rand"
 	"net"
+	"net/http"
 	"regexp"
 	"strconv"
 	"strings"
@@ -96,10 +97,11 @@ type webRTCManagerAPISessionsKickReq struct {
 	res  chan webRTCManagerAPISessionsKickRes
 }
 
-type webRTCNewSessionRes struct {
-	sx     *webRTCSession
-	answer []byte
-	err    error
+type webRTCSessionNewRes struct {
+	sx            *webRTCSession
+	answer        []byte
+	err           error
+	errStatusCode int
 }
 
 type webRTCSessionNewReq struct {
@@ -110,7 +112,7 @@ type webRTCSessionNewReq struct {
 	videoCodec   string
 	audioCodec   string
 	videoBitrate string
-	res          chan webRTCNewSessionRes
+	res          chan webRTCSessionNewRes
 }
 
 type webRTCSessionAddCandidatesRes struct {
@@ -289,7 +291,7 @@ outer:
 			)
 			m.sessions[sx] = struct{}{}
 			m.sessionsBySecret[sx.secret] = sx
-			req.res <- webRTCNewSessionRes{sx: sx}
+			req.res <- webRTCSessionNewRes{sx: sx}
 
 		case sx := <-m.chSessionClose:
 			delete(m.sessions, sx)
@@ -429,8 +431,8 @@ func (m *webRTCManager) genICEServers() []webrtc.ICEServer {
 }
 
 // sessionNew is called by webRTCHTTPServer.
-func (m *webRTCManager) sessionNew(req webRTCSessionNewReq) webRTCNewSessionRes {
-	req.res = make(chan webRTCNewSessionRes)
+func (m *webRTCManager) sessionNew(req webRTCSessionNewReq) webRTCSessionNewRes {
+	req.res = make(chan webRTCSessionNewRes)
 
 	select {
 	case m.chSessionNew <- req:
@@ -441,11 +443,11 @@ func (m *webRTCManager) sessionNew(req webRTCSessionNewReq) webRTCNewSessionRes
 			return res2
 
 		case <-res1.sx.ctx.Done():
-			return webRTCNewSessionRes{err: fmt.Errorf("terminated")}
+			return webRTCSessionNewRes{err: fmt.Errorf("terminated"), errStatusCode: http.StatusInternalServerError}
 		}
 
 	case <-m.ctx.Done():
-		return webRTCNewSessionRes{err: fmt.Errorf("terminated")}
+		return webRTCSessionNewRes{err: fmt.Errorf("terminated"), errStatusCode: http.StatusInternalServerError}
 	}
 }
 

internal/core/webrtc_manager_test.go

@@ -295,6 +295,41 @@ func TestWebRTCRead(t *testing.T) {
 	}, pkt)
 }
 
+func TestWebRTCReadNotFound(t *testing.T) {
+	p, ok := newInstance("paths:\n" +
+		"  all:\n")
+	require.Equal(t, true, ok)
+	defer p.Close()
+
+	iceServers := whipGetICEServers(t, "http://localhost:8889/stream/whep")
+
+	pc, err := webrtc.NewPeerConnection(webrtc.Configuration{
+		ICEServers: iceServers,
+	})
+	require.NoError(t, err)
+	defer pc.Close()
+
+	_, err = pc.AddTransceiverFromKind(webrtc.RTPCodecTypeVideo)
+	require.NoError(t, err)
+
+	offer, err := pc.CreateOffer(nil)
+	require.NoError(t, err)
+
+	enc, err := json.Marshal(offer)
+	require.NoError(t, err)
+
+	req, err := http.NewRequest("POST", "http://localhost:8889/stream/whep", bytes.NewReader(enc))
+	require.NoError(t, err)
+
+	req.Header.Set("Content-Type", "application/sdp")
+
+	res, err := http.DefaultClient.Do(req)
+	require.NoError(t, err)
+	defer res.Body.Close()
+
+	require.Equal(t, http.StatusNotFound, res.StatusCode)
+}
+
 func TestWebRTCPublish(t *testing.T) {
 	p, ok := newInstance("paths:\n" +
 		"  all:\n")

internal/core/webrtc_session.go

@@ -5,7 +5,9 @@ import (
 	"encoding/hex"
 	"encoding/json"
 	"fmt"
+	"net/http"
 	"strconv"
+	"strings"
 	"sync"
 	"time"
 
@@ -155,9 +157,9 @@ type webRTCSession struct {
 	created    time.Time
 	uuid       uuid.UUID
 	secret     uuid.UUID
-	answerSent bool
 	pcMutex    sync.RWMutex
 	pc         *peerConnection
+	answerSent bool
 
 	chAddRemoteCandidates chan webRTCSessionAddCandidatesReq
 }
@@ -218,12 +220,13 @@ func (s *webRTCSession) safePC() *peerConnection {
 func (s *webRTCSession) run() {
 	defer s.wg.Done()
 
-	err := s.runInner()
+	errStatusCode, err := s.runInner()
 
 	if !s.answerSent {
 		select {
-		case s.req.res <- webRTCNewSessionRes{
-			err: err,
+		case s.req.res <- webRTCSessionNewRes{
+			err:           err,
+			errStatusCode: errStatusCode,
 		}:
 		case <-s.ctx.Done():
 		}
@@ -234,28 +237,28 @@ func (s *webRTCSession) run() {
 	s.Log(logger.Info, "closed (%v)", err)
 }
 
-func (s *webRTCSession) runInner() error {
+func (s *webRTCSession) runInner() (int, error) {
 	if s.req.publish {
 		return s.runPublish()
 	}
 	return s.runRead()
 }
 
-func (s *webRTCSession) runPublish() error {
+func (s *webRTCSession) runPublish() (int, error) {
 	res := s.pathManager.publisherAdd(pathPublisherAddReq{
 		author:   s,
 		pathName: s.req.pathName,
 		skipAuth: true,
 	})
 	if res.err != nil {
-		return res.err
+		return http.StatusInternalServerError, res.err
 	}
 
 	defer res.path.publisherRemove(pathPublisherRemoveReq{author: s})
 
 	offer, err := s.decodeOffer()
 	if err != nil {
-		return err
+		return http.StatusBadRequest, err
 	}
 
 	pc, err := newPeerConnection(
@@ -267,7 +270,7 @@ func (s *webRTCSession) runPublish() error {
 		s.iceTCPMux,
 		s)
 	if err != nil {
-		return err
+		return http.StatusBadRequest, err
 	}
 	defer pc.close()
 
@@ -275,14 +278,14 @@ func (s *webRTCSession) runPublish() error {
 		Direction: webrtc.RTPTransceiverDirectionRecvonly,
 	})
 	if err != nil {
-		return err
+		return http.StatusBadRequest, err
 	}
 
 	_, err = pc.AddTransceiverFromKind(webrtc.RTPCodecTypeAudio, webrtc.RtpTransceiverInit{
 		Direction: webrtc.RTPTransceiverDirectionRecvonly,
 	})
 	if err != nil {
-		return err
+		return http.StatusBadRequest, err
 	}
 
 	trackRecv := make(chan trackRecvPair)
@@ -296,23 +299,23 @@ func (s *webRTCSession) runPublish() error {
 
 	err = pc.SetRemoteDescription(*offer)
 	if err != nil {
-		return err
+		return http.StatusBadRequest, err
 	}
 
 	answer, err := pc.CreateAnswer(nil)
 	if err != nil {
-		return err
+		return http.StatusBadRequest, err
 	}
 
 	err = pc.SetLocalDescription(answer)
 	if err != nil {
-		return err
+		return http.StatusBadRequest, err
 	}
 
 	if s.req.videoBitrate != "" {
 		tmp, err := strconv.ParseUint(s.req.videoBitrate, 10, 31)
 		if err != nil {
-			return err
+			return http.StatusBadRequest, err
 		}
 
 		insertTias(&answer, tmp*1024)
@@ -320,24 +323,24 @@ func (s *webRTCSession) runPublish() error {
 
 	err = s.waitGatheringDone(pc)
 	if err != nil {
-		return err
+		return http.StatusBadRequest, err
 	}
 
 	err = s.writeAnswer(pc.LocalDescription())
 	if err != nil {
-		return err
+		return http.StatusBadRequest, err
 	}
 
 	go s.readRemoteCandidates(pc)
 
 	err = s.waitUntilConnected(pc)
 	if err != nil {
-		return err
+		return 0, err
 	}
 
 	tracks, err := gatherIncomingTracks(s.ctx, pc, trackRecv)
 	if err != nil {
-		return err
+		return 0, err
 	}
 	medias := mediasOfIncomingTracks(tracks)
 
@@ -347,7 +350,7 @@ func (s *webRTCSession) runPublish() error {
 		generateRTPPackets: false,
 	})
 	if rres.err != nil {
-		return rres.err
+		return 0, rres.err
 	}
 
 	s.Log(logger.Info, "is publishing to path '%s', %s",
@@ -360,33 +363,36 @@ func (s *webRTCSession) runPublish() error {
 
 	select {
 	case <-pc.disconnected:
-		return fmt.Errorf("peer connection closed")
+		return 0, fmt.Errorf("peer connection closed")
 
 	case <-s.ctx.Done():
-		return fmt.Errorf("terminated")
+		return 0, fmt.Errorf("terminated")
 	}
 }
 
-func (s *webRTCSession) runRead() error {
+func (s *webRTCSession) runRead() (int, error) {
 	res := s.pathManager.readerAdd(pathReaderAddReq{
 		author:   s,
 		pathName: s.req.pathName,
 		skipAuth: true,
 	})
 	if res.err != nil {
-		return res.err
+		if strings.HasPrefix(res.err.Error(), "no one is publishing") {
+			return http.StatusNotFound, res.err
+		}
+		return http.StatusInternalServerError, res.err
 	}
 
 	defer res.path.readerRemove(pathReaderRemoveReq{author: s})
 
 	tracks, err := gatherOutgoingTracks(res.stream.medias())
 	if err != nil {
-		return err
+		return http.StatusBadRequest, err
 	}
 
 	offer, err := s.decodeOffer()
 	if err != nil {
-		return err
+		return http.StatusBadRequest, err
 	}
 
 	pc, err := newPeerConnection(
@@ -398,7 +404,7 @@ func (s *webRTCSession) runRead() error {
 		s.iceTCPMux,
 		s)
 	if err != nil {
-		return err
+		return http.StatusBadRequest, err
 	}
 	defer pc.close()
 
@@ -406,40 +412,40 @@ func (s *webRTCSession) runRead() error {
 		var err error
 		track.sender, err = pc.AddTrack(track.track)
 		if err != nil {
-			return err
+			return http.StatusBadRequest, err
 		}
 	}
 
 	err = pc.SetRemoteDescription(*offer)
 	if err != nil {
-		return err
+		return http.StatusBadRequest, err
 	}
 
 	answer, err := pc.CreateAnswer(nil)
 	if err != nil {
-		return err
+		return http.StatusBadRequest, err
 	}
 
 	err = pc.SetLocalDescription(answer)
 	if err != nil {
-		return err
+		return http.StatusBadRequest, err
 	}
 
 	err = s.waitGatheringDone(pc)
 	if err != nil {
-		return err
+		return http.StatusBadRequest, err
 	}
 
 	err = s.writeAnswer(pc.LocalDescription())
 	if err != nil {
-		return err
+		return http.StatusBadRequest, err
 	}
 
 	go s.readRemoteCandidates(pc)
 
 	err = s.waitUntilConnected(pc)
 	if err != nil {
-		return err
+		return 0, err
 	}
 
 	ringBuffer, _ := ringbuffer.New(uint64(s.readBufferCount))
@@ -468,13 +474,13 @@ func (s *webRTCSession) runRead() error {
 
 	select {
 	case <-pc.disconnected:
-		return fmt.Errorf("peer connection closed")
+		return 0, fmt.Errorf("peer connection closed")
 
 	case err := <-writeError:
-		return err
+		return 0, err
 
 	case <-s.ctx.Done():
-		return fmt.Errorf("terminated")
+		return 0, fmt.Errorf("terminated")
 	}
 }
 
@@ -511,7 +517,7 @@ func (s *webRTCSession) writeAnswer(answer *webrtc.SessionDescription) error {
 	}
 
 	select {
-	case s.req.res <- webRTCNewSessionRes{
+	case s.req.res <- webRTCSessionNewRes{
 		sx:     s,
 		answer: enc,
 	}: