commit c8f076c2ab1f0429ec07ab05ae66dd82bbd45f7f Author: Torjus Håkestad Date: Thu Nov 30 19:32:38 2023 +0100 Initial commit diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..600d2d3 --- /dev/null +++ b/.gitignore @@ -0,0 +1 @@ +.vscode \ No newline at end of file diff --git a/Dockerfile b/Dockerfile new file mode 100644 index 0000000..28aba1c --- /dev/null +++ b/Dockerfile @@ -0,0 +1,11 @@ +FROM golang:alpine as builder +WORKDIR /app +COPY go.mod /app/go.mod +COPY go.sum /app/go.sum +RUN go mod download +COPY . /app +RUN go build -o ministream main.go + +FROM alpine:latest +COPY --from=builder /app/ministream /usr/bin/ministream +CMD ["/usr/bin/ministream", "serve"] diff --git a/README.md b/README.md new file mode 100644 index 0000000..4b919dc --- /dev/null +++ b/README.md @@ -0,0 +1,2 @@ +# ministream + diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..b937ea7 --- /dev/null +++ b/go.mod @@ -0,0 +1,39 @@ +module git.t-juice.club/torjus/ministream + +go 1.21.3 + +require ( + github.com/go-chi/chi/v5 v5.0.10 + github.com/urfave/cli/v2 v2.25.7 + golang.org/x/crypto v0.15.0 +) + +require ( + github.com/cpuguy83/go-md2man/v2 v2.0.3 // indirect + github.com/davecgh/go-spew v1.1.1 // indirect + github.com/google/uuid v1.4.0 // indirect + github.com/pion/datachannel v1.5.5 // indirect + github.com/pion/dtls/v2 v2.2.8 // indirect + github.com/pion/ice/v3 v3.0.2 // indirect + github.com/pion/interceptor v0.1.25 // indirect + github.com/pion/logging v0.2.2 // indirect + github.com/pion/mdns v0.0.9 // indirect + github.com/pion/randutil v0.1.0 // indirect + github.com/pion/rtcp v1.2.12 // indirect + github.com/pion/rtp v1.8.3 // indirect + github.com/pion/sctp v1.8.9 // indirect + github.com/pion/sdp/v3 v3.0.6 // indirect + github.com/pion/srtp/v3 v3.0.1 // indirect + github.com/pion/stun/v2 v2.0.0 // indirect + github.com/pion/transport/v2 v2.2.4 // indirect + github.com/pion/transport/v3 v3.0.1 // indirect + github.com/pion/turn/v3 v3.0.1 // indirect + github.com/pion/webrtc/v4 v4.0.0-beta.7 // indirect + github.com/pmezard/go-difflib v1.0.0 // indirect + github.com/russross/blackfriday/v2 v2.1.0 // indirect + github.com/stretchr/testify v1.8.4 // indirect + github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673 // indirect + golang.org/x/net v0.18.0 // indirect + golang.org/x/sys v0.14.0 // indirect + gopkg.in/yaml.v3 v3.0.1 // indirect +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..a6b1dff --- /dev/null +++ b/go.sum @@ -0,0 +1,206 @@ +github.com/cpuguy83/go-md2man/v2 v2.0.3 h1:qMCsGGgs+MAzDFyp9LpAe1Lqy/fY/qCovCm0qnXZOBM= +github.com/cpuguy83/go-md2man/v2 v2.0.3/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o= +github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= +github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c= +github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= 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"github.com/urfave/cli/v2" +) + +const Version = "v0.1.0" + +func main() { + app := cli.App{ + Name: "ministream", + Usage: "Small livestreaming platform.", + Commands: []*cli.Command{ + { + Name: "serve", + Usage: "Start livestreaming server.", + Action: func(ctx *cli.Context) error { + store := server.NewUserStore() + + srv := server.NewServer(store) + srv.Addr = ":8080" + srv.ListenAndServe() + return nil + }, + }, + }, + Version: Version, + } + + err := app.RunContext(context.Background(), os.Args) + if err != nil { + fmt.Println(err) + } +} diff --git a/server/server.go b/server/server.go new file mode 100644 index 0000000..9226ff0 --- /dev/null +++ b/server/server.go @@ -0,0 +1,157 @@ +package server + +import ( + "bytes" + "embed" + "encoding/json" + "fmt" + "io" + "log/slog" + "net/http" + "strings" + + "github.com/go-chi/chi/v5" + "github.com/pion/sdp/v3" + "github.com/pion/webrtc/v4" +) + +//go:embed static +var static embed.FS + +type Server struct { + users *UserStore + streams *StreamStore + http.Server +} + +func NewServer(store *UserStore) *Server { + srv := &Server{ + users: store, + streams: NewStreamStore(), + } + + r := chi.NewRouter() + r.Get("/", srv.StaticHandler) + r.Get("/{name}", srv.StaticHandler) + r.Post("/whip", http.HandlerFunc(srv.WhipHandler)) + r.Get("/whip", srv.ListHandler) + r.Delete("/whip/{streamKey}", srv.DeleteHandler) + r.Post("/whip/{streamKey}", srv.PostOfferHandler) + + srv.Handler = r + + return srv +} + +func (s *Server) StaticHandler(w http.ResponseWriter, r *http.Request) { + name := chi.URLParam(r, "name") + if name == "" { + name = "index.html" + } + + path := fmt.Sprintf("static/%s", name) + + if strings.Contains(name, ".js") { + w.Header().Add("Content-Type", "text/javascript") + } + if strings.Contains(name, ".css") { + w.Header().Add("Content-Type", "text/css") + } + + f, err := static.Open(path) + if err != nil { + w.WriteHeader(http.StatusInternalServerError) + return + } + defer f.Close() + + io.Copy(w, f) +} + +func (s *Server) PostOfferHandler(w http.ResponseWriter, r *http.Request) { + defer r.Body.Close() + streamKey := chi.URLParam(r, "streamKey") + + stream, err := s.streams.Get(streamKey) + if err != nil { + slog.Warn("Unable to fetch stream.", "error", err, "stream_key", streamKey) + w.WriteHeader(http.StatusNotFound) + return + } + + var buf bytes.Buffer + io.Copy(&buf, r.Body) + + offer := &webrtc.SessionDescription{Type: webrtc.SDPTypeOffer, SDP: buf.String()} + + answer, err := stream.AddListener(offer) + if err != nil { + slog.Warn("Unable to add peer.", "error", err, "stream_key", streamKey, "buf", buf.String()) + w.WriteHeader(http.StatusBadRequest) + return + } + + io.WriteString(w, answer.SDP) + + slog.Info("Got offer.", "stream", stream) +} + +func (s *Server) DeleteHandler(w http.ResponseWriter, r *http.Request) { + streamKey := chi.URLParam(r, "streamKey") + s.streams.Delete(streamKey) + slog.Info("Deleted stream.", "streamKey", streamKey) + w.WriteHeader(http.StatusOK) +} + +func (s *Server) ListHandler(w http.ResponseWriter, r *http.Request) { + streams := s.streams.List() + enc := json.NewEncoder(w) + enc.Encode(&streams) +} + +func (s *Server) WhipHandler(w http.ResponseWriter, r *http.Request) { + defer r.Body.Close() + + streamKey, err := streamKeyFromHeader(r.Header.Get("Authorization")) + if err != nil { + slog.Warn("Incoming request with invalid auth header.") + w.WriteHeader(http.StatusInternalServerError) + return + } + + var buf bytes.Buffer + + io.Copy(&buf, r.Body) + + offer := &webrtc.SessionDescription{Type: webrtc.SDPTypeOffer, SDP: buf.String()} + + offerSdp := sdp.SessionDescription{} + if err := offerSdp.Unmarshal(buf.Bytes()); err != nil { + panic(err) + } + + slog.Info("Got SDP.", "id", offerSdp.Origin.SessionID, "ip", offerSdp.Origin.UnicastAddress) + + answer, err := s.streams.Add(streamKey, offer) + if err != nil { + slog.Error("Error adding stream.", "error", err) + w.WriteHeader(http.StatusInternalServerError) + return + } + + w.Header().Add("Location", fmt.Sprintf("/whip/%s", streamKey)) + w.WriteHeader(http.StatusCreated) + if _, err := io.WriteString(w, answer.SDP); err != nil { + slog.Error("Error writing response.", "error", err) + } + slog.Info("Wrote answer.") +} + +func streamKeyFromHeader(header string) (string, error) { + split := strings.Split(header, " ") + if len(split) != 2 { + return "", fmt.Errorf("invalid header") + } + + return split[1], nil +} diff --git a/server/static/index.html b/server/static/index.html new file mode 100644 index 0000000..0ce8593 --- /dev/null +++ b/server/static/index.html @@ -0,0 +1,15 @@ + + + + + title + + + + +

HELLO!

+
    +
+ + + \ No newline at end of file diff --git a/server/static/script.js b/server/static/script.js new file mode 100644 index 0000000..cdf4b1b --- /dev/null +++ b/server/static/script.js @@ -0,0 +1,66 @@ +const startStream = function (streamKey) { + const pc = new RTCPeerConnection({ + iceServers: [{ urls: 'stun:stun.l.google.com:19302' }] + }) + + pc.oniceconnectionstatechange = e => console.log(e) + pc.addTransceiver('video') + pc.addTransceiver('audio') + pc.createOffer().then(offer => { + fetch("/whip/tjuice", { + method: "POST", + body: offer.sdp + }).then(resp => { + resp.text().then(text => { + var answer = { + type: "answer", + sdp: text + } + try { + pc.setLocalDescription(offer).then( + pc.setRemoteDescription(answer) + ) + } catch (e) { + console.log("Error setting remote description: " + e) + } + }) + }); + }) + + pc.ontrack = function (event) { + console.log(event) + const el = document.getElementById('video1') + var ms = new MediaStream() + event.streams.forEach(s => { + const tracks = s.getTracks() + tracks.forEach( t => { + ms.addTrack(t) + }) + }) + + el.srcObject = ms + el.autoplay = true + el.controls = true + } +} + +displayStreams = function () { + fetch("/whip").then(resp => { + resp.json().then(streamList => { + for (const element of streamList) { + const ol = document.getElementById("streamList") + var entry = document.createElement("li") + var a = document.createElement("a") + a.onclick = _ => startStream(element) + a.append(document.createTextNode(element)) + entry.appendChild(a) + ol.appendChild(entry) + } + }) + }) +} + +window.onload = function ( ev ) { + console.log(ev) + displayStreams() +} \ No newline at end of file diff --git a/server/static/style.css b/server/static/style.css new file mode 100644 index 0000000..4f3cde2 --- /dev/null +++ b/server/static/style.css @@ -0,0 +1,3 @@ +body { + color: #ff5722; +} \ No newline at end of file diff --git a/server/stream.go b/server/stream.go new file mode 100644 index 0000000..7bbb64e --- /dev/null +++ b/server/stream.go @@ -0,0 +1,249 @@ +package server + +import ( + "errors" + "fmt" + "io" + "log/slog" + "sync" + "time" + + "github.com/pion/interceptor" + "github.com/pion/interceptor/pkg/intervalpli" + "github.com/pion/webrtc/v4" +) + +var ErrNoSuchStream error = fmt.Errorf("no such stream") + +type StreamStore struct { + Streams map[string]*Stream + mu sync.Mutex +} + +func NewStreamStore() *StreamStore { + s := &StreamStore{ + Streams: make(map[string]*Stream), + } + + return s +} + +type Stream struct { + peerConnection *webrtc.PeerConnection + lastUpdate time.Time + localTracks []*webrtc.TrackLocalStaticRTP + peers []*webrtc.PeerConnection + mu sync.Mutex +} + +func (s *Stream) AddListener(sd *webrtc.SessionDescription) (*webrtc.SessionDescription, error) { + peerConnectionConfig := webrtc.Configuration{ + ICEServers: []webrtc.ICEServer{ + { + URLs: []string{"stun:stun.l.google.com:19302"}, + }, + }, + } + + peerConnection, err := webrtc.NewPeerConnection(peerConnectionConfig) + if err != nil { + return nil, err + } + + for _, ltrack := range s.localTracks { + rtpSender, err := peerConnection.AddTrack(ltrack) + if err != nil { + // TODO, stop peerconn + return nil, err + } + go func() { + rtcpBuf := make([]byte, 1500) + for { + if _, _, err := rtpSender.Read(rtcpBuf); err != nil { + peerConnection.Close() + return + } + } + }() + } + + err = peerConnection.SetRemoteDescription(*sd) + if err != nil { + return nil, err + } + answer, err := peerConnection.CreateAnswer(nil) + if err != nil { + return nil, err + } + gatherComplete := webrtc.GatheringCompletePromise(peerConnection) + + // Sets the LocalDescription, and starts our UDP listeners + err = peerConnection.SetLocalDescription(answer) + if err != nil { + panic(err) + } + + // Block until ICE Gathering is complete, disabling trickle ICE + // we do this because we only can exchange one signaling message + // in a production application you should exchange ICE Candidates via OnICECandidate + <-gatherComplete + s.mu.Lock() + s.peers = append(s.peers, peerConnection) + + defer s.mu.Unlock() + + // Get the LocalDescription and take it to base64 so we can paste in browser + return peerConnection.LocalDescription(), nil +} + +func (s *StreamStore) Add(streamKey string, sd *webrtc.SessionDescription) (*webrtc.SessionDescription, error) { + answerChan := make(chan *webrtc.SessionDescription) + + go func() { + stream := &Stream{ + lastUpdate: time.Now(), + } + m := &webrtc.MediaEngine{} + if err := m.RegisterDefaultCodecs(); err != nil { + panic(err) + } + + i := &interceptor.Registry{} + if err := webrtc.RegisterDefaultInterceptors(m, i); err != nil { + panic(err) + } + intervalPliFactory, err := intervalpli.NewReceiverInterceptor() + if err != nil { + panic(err) + } + i.Add(intervalPliFactory) + + peerConnectionConfig := webrtc.Configuration{ + ICEServers: []webrtc.ICEServer{ + { + URLs: []string{"stun:stun.l.google.com:19302"}, + }, + }, + } + + // Create a new RTCPeerConnection + peerConnection, err := webrtc.NewAPI(webrtc.WithMediaEngine(m), webrtc.WithInterceptorRegistry(i)).NewPeerConnection(peerConnectionConfig) + if err != nil { + panic(err) + } + + stream.peerConnection = peerConnection + + // Allow us to receive 1 video track + if _, err := peerConnection.AddTransceiverFromKind(webrtc.RTPCodecTypeVideo, webrtc.RTPTransceiverInit{Direction: webrtc.RTPTransceiverDirectionRecvonly}); err != nil { + panic(err) + } + if _, err := peerConnection.AddTransceiverFromKind(webrtc.RTPCodecTypeAudio, webrtc.RTPTransceiverInit{Direction: webrtc.RTPTransceiverDirectionRecvonly}); err != nil { + panic(err) + } + + // Set a handler for when a new remote track starts, this just distributes all our packets + // to connected peers + peerConnection.OnTrack(func(remoteTrack *webrtc.TrackRemote, receiver *webrtc.RTPReceiver) { + // Create a local track, all our SFU clients will be fed via this track + slog.Info("Got track!", "type", remoteTrack.Codec().MimeType, "id", remoteTrack.ID()) + localTrack, newTrackErr := webrtc.NewTrackLocalStaticRTP(remoteTrack.Codec().RTPCodecCapability, "video", "pion") + if newTrackErr != nil { + panic(newTrackErr) + } + + stream.mu.Lock() + stream.localTracks = append(stream.localTracks, localTrack) + stream.mu.Unlock() + + rtpBuf := make([]byte, 1400) + for { + i, _, readErr := remoteTrack.Read(rtpBuf) + if readErr != nil { + if errors.Is(readErr, io.EOF) { + slog.Warn("EOF from track.", "id", remoteTrack.ID()) + return + } + panic(readErr) + } + + // ErrClosedPipe means we don't have any subscribers, this is ok if no peers have connected yet + if _, err = localTrack.Write(rtpBuf[:i]); err != nil && !errors.Is(err, io.ErrClosedPipe) { + panic(err) + } + } + }) + + // Set the remote SessionDescription + offer := webrtc.SessionDescription{Type: webrtc.SDPTypeOffer, SDP: sd.SDP} + + err = peerConnection.SetRemoteDescription(offer) + if err != nil { + panic(err) + } + + // Create answer + answer, err := peerConnection.CreateAnswer(nil) + if err != nil { + panic(err) + } + + // Create channel that is blocked until ICE Gathering is complete + gatherComplete := webrtc.GatheringCompletePromise(peerConnection) + + // Sets the LocalDescription, and starts our UDP listeners + err = peerConnection.SetLocalDescription(answer) + if err != nil { + panic(err) + } + + // Block until ICE Gathering is complete, disabling trickle ICE + // we do this because we only can exchange one signaling message + // in a production application you should exchange ICE Candidates via OnICECandidate + <-gatherComplete + slog.Info("ICE Gathering complete.", "answer", answer) + answerChan <- &answer + + s.Streams[streamKey] = stream + slog.Info("Added stream.", "stream_key", streamKey) + }() + answer := <-answerChan + return answer, nil +} + +func (s *StreamStore) Get(streamKey string) (*Stream, error) { + stream, ok := s.Streams[streamKey] + if !ok { + return nil, ErrNoSuchStream + } + + return stream, nil +} + +func (s *StreamStore) Delete(streamKey string) error { + stream, ok := s.Streams[streamKey] + if !ok { + return nil + } + + s.mu.Lock() + defer s.mu.Unlock() + delete(s.Streams, streamKey) + + for _, peer := range stream.peers { + if err := peer.Close(); err != nil { + slog.Warn("Error closing peer.", "error", err) + } + } + + return stream.peerConnection.Close() +} + +func (s *StreamStore) List() []string { + streams := []string{} + for key := range s.Streams { + streams = append(streams, key) + } + + return streams +} diff --git a/server/users.go b/server/users.go new file mode 100644 index 0000000..8661e86 --- /dev/null +++ b/server/users.go @@ -0,0 +1,100 @@ +package server + +import ( + "encoding/json" + "fmt" + "io" + "os" + + "golang.org/x/crypto/bcrypt" +) + +type User struct { + Username string `json:"username"` + HashedPassword []byte `json:"hashed_password"` + IsAdmin bool `json:"is_admin"` +} + +func (u *User) SetPassword(password string) error { + hash, err := bcrypt.GenerateFromPassword([]byte(password), bcrypt.DefaultCost) + if err != nil { + return err + } + + u.HashedPassword = hash + + return nil +} + +func (u *User) VerifyPassword(password string) error { + return bcrypt.CompareHashAndPassword([]byte(u.HashedPassword), []byte(password)) +} + +type UserStore struct { + users map[string]*User +} + +func NewUserStore() *UserStore { + return &UserStore{ + users: make(map[string]*User), + } +} + +var ErrNoSuchUser = fmt.Errorf("no such user") + +func (s *UserStore) Put(u *User) error { + s.users[u.Username] = u + + return nil +} + +func (s *UserStore) Get(username string) (*User, error) { + u, ok := s.users[username] + if !ok { + return nil, ErrNoSuchUser + } + + return u, nil +} + +func (s *UserStore) ToWriter(w io.Writer) error { + enc := json.NewEncoder(w) + + if err := enc.Encode(&s.users); err != nil { + return err + } + + return nil +} + +func (s *UserStore) ToFile(path string) error { + f, err := os.Create(path) + if err != nil { + return err + } + defer f.Close() + + return s.ToWriter(f) +} + +func StoreFromReader(r io.Reader) (*UserStore, error) { + dec := json.NewDecoder(r) + + s := &UserStore{} + + if err := dec.Decode(&s.users); err != nil { + return nil, err + } + + return s, nil +} + +func StoreFromFile(path string) (*UserStore, error) { + f, err := os.Open(path) + if err != nil { + return nil, err + } + defer f.Close() + + return StoreFromReader(f) +} diff --git a/server/users_test.go b/server/users_test.go new file mode 100644 index 0000000..1db224c --- /dev/null +++ b/server/users_test.go @@ -0,0 +1,89 @@ +package server_test + +import ( + "bytes" + "testing" + + "git.t-juice.club/torjus/ministream/server" +) + +func TestPassword(t *testing.T) { + t.Run("SetAndVerify", func(t *testing.T) { + user := &server.User{} + password := "i L0ve K1tt3ns" + if err := user.SetPassword(password); err != nil { + t.Fatalf("Error setting password: %s", err) + } + + if err := user.VerifyPassword(password); err != nil { + t.Fatalf("Error verifying with correct password: %s", err) + } + + if err := user.VerifyPassword("wrong"); err == nil { + t.Errorf("Verifying with wrong password did not return error") + } + }) +} + +func TestUserStore(t *testing.T) { + t.Run("SaveLoad", func(t *testing.T) { + data := []struct { + Username string + Passord string + Admin bool + }{ + { + Username: "admin", + Passord: "adminpw", + Admin: true, + }, + { + Username: "dave", + Passord: "dave", + }, + } + + users := make(map[string]*server.User) + for _, item := range data { + u := &server.User{Username: item.Username, IsAdmin: item.Admin} + err := u.SetPassword(item.Passord) + if err != nil { + t.Fatalf("Error setting password: %s", err) + } + users[item.Username] = u + } + + s := server.NewUserStore() + for _, u := range users { + if err := s.Put(u); err != nil { + t.Fatalf("Error storing user: %s", err) + } + } + + // Write to buffer + var buf bytes.Buffer + if err := s.ToWriter(&buf); err != nil { + t.Fatalf("Error writing store to buffer: %s", err) + } + + loaded, err := server.StoreFromReader(&buf) + if err != nil { + t.Fatalf("Error loading store: %s", err) + } + + for _, item := range data { + u, err := loaded.Get(item.Username) + if err != nil { + t.Fatalf("Error getting user after load: %s", err) + } + + if u.IsAdmin != item.Admin { + t.Fatalf("IsAdmin value changed.") + } + + if err := u.VerifyPassword(item.Passord); err != nil { + t.Fatalf("Verifying password after load failed: %s", err) + } + } + }) +}