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b/server/Cargo.toml new file mode 100644 index 0000000..d4dcbb7 --- /dev/null +++ b/server/Cargo.toml @@ -0,0 +1,9 @@ +[package] +name = "warp-server" +version = "0.1.0" +edition = "2021" + +# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html + +[dependencies] +quiche = { git = "https://github.com/n8o/quiche.git", branch = "master" } # WebTransport fork diff --git a/server/go.mod b/server/go.mod deleted file mode 100644 index 7e5b4fb..0000000 --- a/server/go.mod +++ /dev/null @@ -1,30 +0,0 @@ -module github.com/kixelated/warp/server - -go 1.18 - -require ( - github.com/abema/go-mp4 v0.7.2 - github.com/kixelated/invoker v1.0.0 - github.com/kixelated/quic-go v1.31.0 - github.com/kixelated/webtransport-go v1.4.1 - github.com/zencoder/go-dash/v3 v3.0.2 -) - -require ( - github.com/francoispqt/gojay v1.2.13 // indirect - github.com/go-task/slim-sprig v0.0.0-20210107165309-348f09dbbbc0 // indirect - github.com/golang/mock v1.6.0 // indirect - github.com/google/pprof v0.0.0-20210407192527-94a9f03dee38 // indirect - github.com/google/uuid v1.1.2 // indirect - github.com/marten-seemann/qpack v0.3.0 // indirect - github.com/marten-seemann/qtls-go1-18 v0.1.3 // indirect - github.com/marten-seemann/qtls-go1-19 v0.1.1 // indirect - github.com/onsi/ginkgo/v2 v2.2.0 // indirect - golang.org/x/crypto v0.0.0-20220331220935-ae2d96664a29 // indirect - golang.org/x/exp v0.0.0-20220722155223-a9213eeb770e // indirect - golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4 // indirect - golang.org/x/net v0.0.0-20220722155237-a158d28d115b // indirect - golang.org/x/sys v0.1.1-0.20221102194838-fc697a31fa06 // indirect - golang.org/x/text v0.3.7 // indirect - golang.org/x/tools v0.1.12 // indirect -) diff --git a/server/go.sum b/server/go.sum deleted file mode 100644 index fed92be..0000000 --- a/server/go.sum +++ /dev/null @@ -1,264 +0,0 @@ -cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= 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v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= -honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= -honnef.co/go/tools v0.0.1-2020.1.6/go.mod h1:pyyisuGw24ruLjrr1ddx39WE0y9OooInRzEYLhQB2YY= -sourcegraph.com/sourcegraph/go-diff v0.5.0/go.mod h1:kuch7UrkMzY0X+p9CRK03kfuPQ2zzQcaEFbx8wA8rck= -sourcegraph.com/sqs/pbtypes v0.0.0-20180604144634-d3ebe8f20ae4/go.mod h1:ketZ/q3QxT9HOBeFhu6RdvsftgpsbFHBF5Cas6cDKZ0= diff --git a/server/internal/warp/media.go b/server/internal/warp/media.go deleted file mode 100644 index 86d6f93..0000000 --- a/server/internal/warp/media.go +++ /dev/null @@ -1,380 +0,0 @@ -package warp - -import ( - "bytes" - "context" - "encoding/binary" - "errors" - "fmt" - "io" - "io/fs" - "os" - "path/filepath" - "strings" - "time" - - "github.com/abema/go-mp4" - "github.com/kixelated/invoker" - "github.com/zencoder/go-dash/v3/mpd" -) - -// This is a demo; you should actually fetch media from a live backend. -// It's just much easier to read from disk and "fake" being live. -type Media struct { - base fs.FS - inits map[string]*MediaInit - video []*mpd.Representation - audio []*mpd.Representation -} - -func NewMedia(playlistPath string) (m *Media, err error) { - m = new(Media) - - // Create a fs.FS out of the folder holding the playlist - m.base = os.DirFS(filepath.Dir(playlistPath)) - - // Read the playlist file - playlist, err := mpd.ReadFromFile(playlistPath) - if err != nil { - return nil, fmt.Errorf("failed to open playlist: %w", err) - } - - if len(playlist.Periods) > 1 { - return nil, fmt.Errorf("multiple periods not supported") - } - - period := playlist.Periods[0] - - for _, adaption := range period.AdaptationSets { - representation := adaption.Representations[0] - - if representation.MimeType == nil { - return nil, fmt.Errorf("missing representation mime type") - } - - if representation.Bandwidth == nil { - return nil, fmt.Errorf("missing representation bandwidth") - } - - switch *representation.MimeType { - case "video/mp4": - m.video = append(m.video, representation) - case "audio/mp4": - m.audio = append(m.audio, representation) - } - } - - if len(m.video) == 0 { - return nil, fmt.Errorf("no video representation found") - } - - if len(m.audio) == 0 { - return nil, fmt.Errorf("no audio representation found") - } - - m.inits = make(map[string]*MediaInit) - - var reps []*mpd.Representation - reps = append(reps, m.audio...) - reps = append(reps, m.video...) - - for _, rep := range reps { - path := *rep.SegmentTemplate.Initialization - - // TODO Support the full template engine - path = strings.ReplaceAll(path, "$RepresentationID$", *rep.ID) - - f, err := fs.ReadFile(m.base, path) - if err != nil { - return nil, fmt.Errorf("failed to read init file: %w", err) - } - - init, err := newMediaInit(*rep.ID, f) - if err != nil { - return nil, fmt.Errorf("failed to create init segment: %w", err) - } - - m.inits[*rep.ID] = init - } - - return m, nil -} - -func (m *Media) Start(bitrate func() uint64) (inits map[string]*MediaInit, audio *MediaStream, video *MediaStream, err error) { - start := time.Now() - - audio, err = newMediaStream(m, m.audio, start, bitrate) - if err != nil { - return nil, nil, nil, err - } - - video, err = newMediaStream(m, m.video, start, bitrate) - if err != nil { - return nil, nil, nil, err - } - - return m.inits, audio, video, nil -} - -type MediaStream struct { - Media *Media - - start time.Time - reps []*mpd.Representation - sequence int - bitrate func() uint64 // returns the current estimated bitrate -} - -func newMediaStream(m *Media, reps []*mpd.Representation, start time.Time, bitrate func() uint64) (ms *MediaStream, err error) { - ms = new(MediaStream) - ms.Media = m - ms.reps = reps - ms.start = start - ms.bitrate = bitrate - return ms, nil -} - -func (ms *MediaStream) chooseRepresentation() (choice *mpd.Representation) { - bitrate := ms.bitrate() - - // Loop over the renditions and pick the highest bitrate we can support - for _, r := range ms.reps { - if uint64(*r.Bandwidth) <= bitrate && (choice == nil || *r.Bandwidth > *choice.Bandwidth) { - choice = r - } - } - - if choice != nil { - return choice - } - - // We can't support any of the bitrates, so find the lowest one. - for _, r := range ms.reps { - if choice == nil || *r.Bandwidth < *choice.Bandwidth { - choice = r - } - } - - return choice -} - -// Returns the next segment in the stream -func (ms *MediaStream) Next(ctx context.Context) (segment *MediaSegment, err error) { - rep := ms.chooseRepresentation() - - if rep.SegmentTemplate == nil { - return nil, fmt.Errorf("missing segment template") - } - - if rep.SegmentTemplate.Media == nil { - return nil, fmt.Errorf("no media template") - } - - if rep.SegmentTemplate.StartNumber == nil { - return nil, fmt.Errorf("missing start number") - } - - path := *rep.SegmentTemplate.Media - sequence := ms.sequence + int(*rep.SegmentTemplate.StartNumber) - - // TODO Support the full template engine - path = strings.ReplaceAll(path, "$RepresentationID$", *rep.ID) - path = strings.ReplaceAll(path, "$Number%05d$", fmt.Sprintf("%05d", sequence)) // TODO TODO - - // Try openning the file - f, err := ms.Media.base.Open(path) - if errors.Is(err, os.ErrNotExist) && ms.sequence != 0 { - // Return EOF if the next file is missing - return nil, nil - } else if err != nil { - return nil, fmt.Errorf("failed to open segment file: %w", err) - } - - duration := time.Duration(*rep.SegmentTemplate.Duration) / time.Nanosecond - timestamp := time.Duration(ms.sequence) * duration - - init := ms.Media.inits[*rep.ID] - - segment, err = newMediaSegment(ms, init, f, timestamp) - if err != nil { - return nil, fmt.Errorf("failed to create segment: %w", err) - } - - ms.sequence += 1 - - return segment, nil -} - -type MediaInit struct { - ID string - Raw []byte - Timescale int -} - -func newMediaInit(id string, raw []byte) (mi *MediaInit, err error) { - mi = new(MediaInit) - mi.ID = id - mi.Raw = raw - - err = mi.parse() - if err != nil { - return nil, fmt.Errorf("failed to parse init segment: %w", err) - } - - return mi, nil -} - -// Parse through the init segment, literally just to populate the timescale -func (mi *MediaInit) parse() (err error) { - r := bytes.NewReader(mi.Raw) - - _, err = mp4.ReadBoxStructure(r, func(h *mp4.ReadHandle) (interface{}, error) { - if !h.BoxInfo.IsSupportedType() { - return nil, nil - } - - payload, _, err := h.ReadPayload() - if err != nil { - return nil, err - } - - switch box := payload.(type) { - case *mp4.Mdhd: // Media Header; moov -> trak -> mdia > mdhd - if mi.Timescale != 0 { - // verify only one track - return nil, fmt.Errorf("multiple mdhd atoms") - } - - mi.Timescale = int(box.Timescale) - } - - // Expands children - return h.Expand() - }) - - if err != nil { - return fmt.Errorf("failed to parse MP4 file: %w", err) - } - - return nil -} - -type MediaSegment struct { - Stream *MediaStream - Init *MediaInit - - file fs.File - timestamp time.Duration -} - -func newMediaSegment(s *MediaStream, init *MediaInit, file fs.File, timestamp time.Duration) (ms *MediaSegment, err error) { - ms = new(MediaSegment) - ms.Stream = s - ms.Init = init - - ms.file = file - ms.timestamp = timestamp - - return ms, nil -} - -// Return the next atom, sleeping based on the PTS to simulate a live stream -func (ms *MediaSegment) Read(ctx context.Context) (chunk []byte, err error) { - // Read the next top-level box - var header [8]byte - - _, err = io.ReadFull(ms.file, header[:]) - if err != nil { - return nil, fmt.Errorf("failed to read header: %w", err) - } - - size := int(binary.BigEndian.Uint32(header[0:4])) - if size < 8 { - return nil, fmt.Errorf("box is too small") - } - - buf := make([]byte, size) - n := copy(buf, header[:]) - - _, err = io.ReadFull(ms.file, buf[n:]) - if err != nil { - return nil, fmt.Errorf("failed to read atom: %w", err) - } - - sample, err := ms.parseAtom(ctx, buf) - if err != nil { - return nil, fmt.Errorf("failed to parse atom: %w", err) - } - - if sample != nil { - // Simulate a live stream by sleeping before we write this sample. - // Figure out how much time has elapsed since the start - elapsed := time.Since(ms.Stream.start) - delay := sample.Timestamp - elapsed - - if delay > 0 { - // Sleep until we're supposed to see these samples - err = invoker.Sleep(delay)(ctx) - if err != nil { - return nil, err - } - } - } - - return buf, nil -} - -// Parse through the MP4 atom, returning infomation about the next fragmented sample -func (ms *MediaSegment) parseAtom(ctx context.Context, buf []byte) (sample *mediaSample, err error) { - r := bytes.NewReader(buf) - - _, err = mp4.ReadBoxStructure(r, func(h *mp4.ReadHandle) (interface{}, error) { - if !h.BoxInfo.IsSupportedType() { - return nil, nil - } - - payload, _, err := h.ReadPayload() - if err != nil { - return nil, err - } - - switch box := payload.(type) { - case *mp4.Moof: - sample = new(mediaSample) - case *mp4.Tfdt: // Track Fragment Decode Timestamp; moof -> traf -> tfdt - // TODO This box isn't required - // TODO we want the last PTS if there are multiple samples - var dts time.Duration - if box.FullBox.Version == 0 { - dts = time.Duration(box.BaseMediaDecodeTimeV0) - } else { - dts = time.Duration(box.BaseMediaDecodeTimeV1) - } - - if ms.Init.Timescale == 0 { - return nil, fmt.Errorf("missing timescale") - } - - // Convert to seconds - // TODO What about PTS? - sample.Timestamp = dts * time.Second / time.Duration(ms.Init.Timescale) - } - - // Expands children - return h.Expand() - }) - - if err != nil { - return nil, fmt.Errorf("failed to parse MP4 file: %w", err) - } - - return sample, nil -} - -func (ms *MediaSegment) Close() (err error) { - return ms.file.Close() -} - -type mediaSample struct { - Timestamp time.Duration // The timestamp of the first sample -} diff --git a/server/internal/warp/message.go b/server/internal/warp/message.go deleted file mode 100644 index 5514b78..0000000 --- a/server/internal/warp/message.go +++ /dev/null @@ -1,20 +0,0 @@ -package warp - -type Message struct { - Init *MessageInit `json:"init,omitempty"` - Segment *MessageSegment `json:"segment,omitempty"` - Debug *MessageDebug `json:"debug,omitempty"` -} - -type MessageInit struct { - Id string `json:"id"` // ID of the init segment -} - -type MessageSegment struct { - Init string `json:"init"` // ID of the init segment to use for this segment - Timestamp int `json:"timestamp"` // PTS of the first frame in milliseconds -} - -type MessageDebug struct { - MaxBitrate int `json:"max_bitrate"` // Artificially limit the QUIC max bitrate -} diff --git a/server/internal/warp/server.go b/server/internal/warp/server.go deleted file mode 100644 index 9ad6f18..0000000 --- a/server/internal/warp/server.go +++ /dev/null @@ -1,132 +0,0 @@ -package warp - -import ( - "context" - "crypto/tls" - "encoding/hex" - "fmt" - "io" - "log" - "net/http" - "os" - "path/filepath" - - "github.com/kixelated/invoker" - "github.com/kixelated/quic-go" - "github.com/kixelated/quic-go/http3" - "github.com/kixelated/quic-go/logging" - "github.com/kixelated/quic-go/qlog" - "github.com/kixelated/webtransport-go" -) - -type Server struct { - inner *webtransport.Server - media *Media - sessions invoker.Tasks - cert *tls.Certificate -} - -type Config struct { - Addr string - Cert *tls.Certificate - LogDir string - Media *Media -} - -func New(config Config) (s *Server, err error) { - s = new(Server) - s.cert = config.Cert - s.media = config.Media - - quicConfig := &quic.Config{} - - if config.LogDir != "" { - quicConfig.Tracer = qlog.NewTracer(func(p logging.Perspective, connectionID []byte) io.WriteCloser { - path := fmt.Sprintf("%s-%s.qlog", p, hex.EncodeToString(connectionID)) - - f, err := os.Create(filepath.Join(config.LogDir, path)) - if err != nil { - // lame - panic(err) - } - - return f - }) - } - - tlsConfig := &tls.Config{ - Certificates: []tls.Certificate{*s.cert}, - } - - // Host a HTTP/3 server to serve the WebTransport endpoint - mux := http.NewServeMux() - mux.HandleFunc("/watch", s.handleWatch) - - s.inner = &webtransport.Server{ - H3: http3.Server{ - TLSConfig: tlsConfig, - QuicConfig: quicConfig, - Addr: config.Addr, - Handler: mux, - }, - CheckOrigin: func(r *http.Request) bool { return true }, - } - - return s, nil -} - -func (s *Server) runServe(ctx context.Context) (err error) { - return s.inner.ListenAndServe() -} - -func (s *Server) runShutdown(ctx context.Context) (err error) { - <-ctx.Done() - s.inner.Close() // close on context shutdown - return ctx.Err() -} - -func (s *Server) Run(ctx context.Context) (err error) { - return invoker.Run(ctx, s.runServe, s.runShutdown, s.sessions.Repeat) -} - -func (s *Server) handleWatch(w http.ResponseWriter, r *http.Request) { - hijacker, ok := w.(http3.Hijacker) - if !ok { - panic("unable to hijack connection: must use kixelated/quic-go") - } - - conn := hijacker.Connection() - - sess, err := s.inner.Upgrade(w, r) - if err != nil { - http.Error(w, "failed to upgrade session", 500) - return - } - - err = s.serveSession(r.Context(), conn, sess) - if err != nil { - log.Println(err) - } -} - -func (s *Server) serveSession(ctx context.Context, conn quic.Connection, sess *webtransport.Session) (err error) { - defer func() { - if err != nil { - sess.CloseWithError(1, err.Error()) - } else { - sess.CloseWithError(0, "end of broadcast") - } - }() - - ss, err := NewSession(conn, sess, s.media) - if err != nil { - return fmt.Errorf("failed to create session: %w", err) - } - - err = ss.Run(ctx) - if err != nil { - return fmt.Errorf("terminated session: %w", err) - } - - return nil -} diff --git a/server/internal/warp/session.go b/server/internal/warp/session.go deleted file mode 100644 index a267619..0000000 --- a/server/internal/warp/session.go +++ /dev/null @@ -1,279 +0,0 @@ -package warp - -import ( - "context" - "encoding/binary" - "encoding/json" - "errors" - "fmt" - "io" - "log" - "math" - "time" - - "github.com/kixelated/invoker" - "github.com/kixelated/quic-go" - "github.com/kixelated/webtransport-go" -) - -// A single WebTransport session -type Session struct { - conn quic.Connection - inner *webtransport.Session - - media *Media - inits map[string]*MediaInit - audio *MediaStream - video *MediaStream - - streams invoker.Tasks -} - -func NewSession(connection quic.Connection, session *webtransport.Session, media *Media) (s *Session, err error) { - s = new(Session) - s.conn = connection - s.inner = session - s.media = media - return s, nil -} - -func (s *Session) Run(ctx context.Context) (err error) { - s.inits, s.audio, s.video, err = s.media.Start(s.conn.GetMaxBandwidth) - if err != nil { - return fmt.Errorf("failed to start media: %w", err) - } - - // Once we've validated the session, now we can start accessing the streams - return invoker.Run(ctx, s.runAccept, s.runAcceptUni, s.runInit, s.runAudio, s.runVideo, s.streams.Repeat) -} - -func (s *Session) runAccept(ctx context.Context) (err error) { - for { - stream, err := s.inner.AcceptStream(ctx) - if err != nil { - return fmt.Errorf("failed to accept bidirectional stream: %w", err) - } - - // Warp doesn't utilize bidirectional streams so just close them immediately. - // We might use them in the future so don't close the connection with an error. - stream.CancelRead(1) - } -} - -func (s *Session) runAcceptUni(ctx context.Context) (err error) { - for { - stream, err := s.inner.AcceptUniStream(ctx) - if err != nil { - return fmt.Errorf("failed to accept unidirectional stream: %w", err) - } - - s.streams.Add(func(ctx context.Context) (err error) { - return s.handleStream(ctx, stream) - }) - } -} - -func (s *Session) handleStream(ctx context.Context, stream webtransport.ReceiveStream) (err error) { - defer func() { - if err != nil { - stream.CancelRead(1) - } - }() - - var header [8]byte - for { - _, err = io.ReadFull(stream, header[:]) - if errors.Is(io.EOF, err) { - return nil - } else if err != nil { - return fmt.Errorf("failed to read atom header: %w", err) - } - - size := binary.BigEndian.Uint32(header[0:4]) - name := string(header[4:8]) - - if size < 8 { - return fmt.Errorf("atom size is too small") - } else if size > 42069 { // arbitrary limit - return fmt.Errorf("atom size is too large") - } else if name != "warp" { - return fmt.Errorf("only warp atoms are supported") - } - - payload := make([]byte, size-8) - - _, err = io.ReadFull(stream, payload) - if err != nil { - return fmt.Errorf("failed to read atom payload: %w", err) - } - - log.Println("received message:", string(payload)) - - msg := Message{} - - err = json.Unmarshal(payload, &msg) - if err != nil { - return fmt.Errorf("failed to decode json payload: %w", err) - } - - if msg.Debug != nil { - s.setDebug(msg.Debug) - } - } -} - -func (s *Session) runInit(ctx context.Context) (err error) { - for _, init := range s.inits { - err = s.writeInit(ctx, init) - if err != nil { - return fmt.Errorf("failed to write init stream: %w", err) - } - } - - return nil -} - -func (s *Session) runAudio(ctx context.Context) (err error) { - for { - segment, err := s.audio.Next(ctx) - if err != nil { - return fmt.Errorf("failed to get next segment: %w", err) - } - - if segment == nil { - return nil - } - - err = s.writeSegment(ctx, segment) - if err != nil { - return fmt.Errorf("failed to write segment stream: %w", err) - } - } -} - -func (s *Session) runVideo(ctx context.Context) (err error) { - for { - segment, err := s.video.Next(ctx) - if err != nil { - return fmt.Errorf("failed to get next segment: %w", err) - } - - if segment == nil { - return nil - } - - err = s.writeSegment(ctx, segment) - if err != nil { - return fmt.Errorf("failed to write segment stream: %w", err) - } - } -} - -// Create a stream for an INIT segment and write the container. -func (s *Session) writeInit(ctx context.Context, init *MediaInit) (err error) { - temp, err := s.inner.OpenUniStreamSync(ctx) - if err != nil { - return fmt.Errorf("failed to create stream: %w", err) - } - - if temp == nil { - // Not sure when this happens, perhaps when closing a connection? - return fmt.Errorf("received a nil stream from quic-go") - } - - // Wrap the stream in an object that buffers writes instead of blocking. - stream := NewStream(temp) - s.streams.Add(stream.Run) - - defer func() { - if err != nil { - stream.WriteCancel(1) - } - }() - - stream.SetPriority(math.MaxInt) - - err = stream.WriteMessage(Message{ - Init: &MessageInit{Id: init.ID}, - }) - if err != nil { - return fmt.Errorf("failed to write init header: %w", err) - } - - _, err = stream.Write(init.Raw) - if err != nil { - return fmt.Errorf("failed to write init data: %w", err) - } - - err = stream.Close() - if err != nil { - return fmt.Errorf("failed to close init stream: %w", err) - } - - return nil -} - -// Create a stream for a segment and write the contents, chunk by chunk. -func (s *Session) writeSegment(ctx context.Context, segment *MediaSegment) (err error) { - temp, err := s.inner.OpenUniStreamSync(ctx) - if err != nil { - return fmt.Errorf("failed to create stream: %w", err) - } - - if temp == nil { - // Not sure when this happens, perhaps when closing a connection? - return fmt.Errorf("received a nil stream from quic-go") - } - - // Wrap the stream in an object that buffers writes instead of blocking. - stream := NewStream(temp) - s.streams.Add(stream.Run) - - defer func() { - if err != nil { - stream.WriteCancel(1) - } - }() - - ms := int(segment.timestamp / time.Millisecond) - - // newer segments take priority - stream.SetPriority(ms) - - err = stream.WriteMessage(Message{ - Segment: &MessageSegment{ - Init: segment.Init.ID, - Timestamp: ms, - }, - }) - if err != nil { - return fmt.Errorf("failed to write segment header: %w", err) - } - - for { - // Get the next fragment - buf, err := segment.Read(ctx) - if errors.Is(err, io.EOF) { - break - } else if err != nil { - return fmt.Errorf("failed to read segment data: %w", err) - } - - // NOTE: This won't block because of our wrapper - _, err = stream.Write(buf) - if err != nil { - return fmt.Errorf("failed to write segment data: %w", err) - } - } - - err = stream.Close() - if err != nil { - return fmt.Errorf("failed to close segemnt stream: %w", err) - } - - return nil -} - -func (s *Session) setDebug(msg *MessageDebug) { - s.conn.SetMaxBandwidth(uint64(msg.MaxBitrate)) -} diff --git a/server/internal/warp/stream.go b/server/internal/warp/stream.go deleted file mode 100644 index 2ba56b6..0000000 --- a/server/internal/warp/stream.go +++ /dev/null @@ -1,144 +0,0 @@ -package warp - -import ( - "context" - "encoding/binary" - "encoding/json" - "fmt" - "sync" - - "github.com/kixelated/webtransport-go" -) - -// Wrapper around quic.SendStream to make Write non-blocking. -// Otherwise we can't write to multiple concurrent streams in the same goroutine. -type Stream struct { - inner webtransport.SendStream - - chunks [][]byte - closed bool - err error - - notify chan struct{} - mutex sync.Mutex -} - -func NewStream(inner webtransport.SendStream) (s *Stream) { - s = new(Stream) - s.inner = inner - s.notify = make(chan struct{}) - return s -} - -func (s *Stream) Run(ctx context.Context) (err error) { - defer func() { - s.mutex.Lock() - s.err = err - s.mutex.Unlock() - }() - - for { - s.mutex.Lock() - - chunks := s.chunks - notify := s.notify - closed := s.closed - - s.chunks = s.chunks[len(s.chunks):] - s.mutex.Unlock() - - for _, chunk := range chunks { - _, err = s.inner.Write(chunk) - if err != nil { - return err - } - } - - if closed { - return s.inner.Close() - } - - if len(chunks) == 0 { - select { - case <-ctx.Done(): - return ctx.Err() - case <-notify: - } - } - } -} - -func (s *Stream) Write(buf []byte) (n int, err error) { - s.mutex.Lock() - defer s.mutex.Unlock() - - if s.err != nil { - return 0, s.err - } - - if s.closed { - return 0, fmt.Errorf("closed") - } - - // Make a copy of the buffer so it's long lived - buf = append([]byte{}, buf...) - s.chunks = append(s.chunks, buf) - - // Wake up the writer - close(s.notify) - s.notify = make(chan struct{}) - - return len(buf), nil -} - -func (s *Stream) WriteMessage(msg Message) (err error) { - payload, err := json.Marshal(msg) - if err != nil { - return fmt.Errorf("failed to marshal message: %w", err) - } - - var size [4]byte - binary.BigEndian.PutUint32(size[:], uint32(len(payload)+8)) - - _, err = s.Write(size[:]) - if err != nil { - return fmt.Errorf("failed to write size: %w", err) - } - - _, err = s.Write([]byte("warp")) - if err != nil { - return fmt.Errorf("failed to write atom header: %w", err) - } - - _, err = s.Write(payload) - if err != nil { - return fmt.Errorf("failed to write payload: %w", err) - } - - return nil -} - -func (s *Stream) WriteCancel(code webtransport.StreamErrorCode) { - s.inner.CancelWrite(code) -} - -func (s *Stream) SetPriority(prio int) { - s.inner.SetPriority(prio) -} - -func (s *Stream) Close() (err error) { - s.mutex.Lock() - defer s.mutex.Unlock() - - if s.err != nil { - return s.err - } - - s.closed = true - - // Wake up the writer - close(s.notify) - s.notify = make(chan struct{}) - - return nil -} diff --git a/server/internal/web/web.go b/server/internal/web/web.go deleted file mode 100644 index dfd766b..0000000 --- a/server/internal/web/web.go +++ /dev/null @@ -1,64 +0,0 @@ -package web - -import ( - "context" - "log" - "net/http" - "time" - - "github.com/kixelated/invoker" -) - -type Server struct { - inner http.Server - config Config -} - -type Config struct { - Addr string - CertFile string - KeyFile string - Fingerprint string // the TLS certificate fingerprint -} - -func New(config Config) (s *Server) { - s = new(Server) - s.config = config - - s.inner = http.Server{ - Addr: config.Addr, - } - - http.HandleFunc("/fingerprint", s.handleFingerprint) - - return s -} - -func (s *Server) Run(ctx context.Context) (err error) { - return invoker.Run(ctx, s.runServe, s.runShutdown) -} - -func (s *Server) runServe(context.Context) (err error) { - // NOTE: Doesn't support context, which is why we need runShutdown - err = s.inner.ListenAndServeTLS(s.config.CertFile, s.config.KeyFile) - log.Println(err) - return err -} - -// Gracefully shut down the server when the context is cancelled -func (s *Server) runShutdown(ctx context.Context) (err error) { - <-ctx.Done() - - timeout, cancel := context.WithTimeout(context.Background(), 5*time.Second) - defer cancel() - _ = s.inner.Shutdown(timeout) - - return ctx.Err() -} - -// Return the sha256 of the certificate as a temporary work-around for local development. -// TODO remove this when WebTransport uses the system CA -func (s *Server) handleFingerprint(w http.ResponseWriter, r *http.Request) { - w.Header().Set("Access-Control-Allow-Origin", "*") - _, _ = w.Write([]byte(s.config.Fingerprint)) -} diff --git a/server/main.go b/server/main.go deleted file mode 100644 index a0b5f9b..0000000 --- a/server/main.go +++ /dev/null @@ -1,71 +0,0 @@ -package main - -import ( - "context" - "crypto/sha256" - "crypto/tls" - "encoding/hex" - "flag" - "fmt" - "log" - - "github.com/kixelated/invoker" - "github.com/kixelated/warp/server/internal/warp" - "github.com/kixelated/warp/server/internal/web" -) - -func main() { - err := run(context.Background()) - if err != nil { - log.Fatal(err) - } -} - -func run(ctx context.Context) (err error) { - addr := flag.String("addr", ":4443", "HTTPS server address") - cert := flag.String("tls-cert", "../cert/localhost.crt", "TLS certificate file path") - key := flag.String("tls-key", "../cert/localhost.key", "TLS certificate file path") - logDir := flag.String("log-dir", "", "logs will be written to the provided directory") - - dash := flag.String("dash", "../media/playlist.mpd", "DASH playlist path") - - flag.Parse() - - media, err := warp.NewMedia(*dash) - if err != nil { - return fmt.Errorf("failed to open media: %w", err) - } - - tlsCert, err := tls.LoadX509KeyPair(*cert, *key) - if err != nil { - return fmt.Errorf("failed to load TLS certificate: %w", err) - } - - warpConfig := warp.Config{ - Addr: *addr, - Cert: &tlsCert, - LogDir: *logDir, - Media: media, - } - - warpServer, err := warp.New(warpConfig) - if err != nil { - return fmt.Errorf("failed to create warp server: %w", err) - } - - hash := sha256.Sum256(tlsCert.Certificate[0]) - fingerprint := hex.EncodeToString(hash[:]) - - webConfig := web.Config{ - Addr: *addr, - CertFile: *cert, - KeyFile: *key, - Fingerprint: fingerprint, - } - - webServer := web.New(webConfig) - - log.Printf("listening on %s", *addr) - - return invoker.Run(ctx, invoker.Interrupt, warpServer.Run, webServer.Run) -} diff --git a/server/src/main.rs b/server/src/main.rs new file mode 100644 index 0000000..e7a11a9 --- /dev/null +++ b/server/src/main.rs @@ -0,0 +1,3 @@ +fn main() { + println!("Hello, world!"); +}