add a Write method for Streams

session.go

@@ -160,7 +160,7 @@ func (s *Session) handleStreamFrame(r *bytes.Reader) error {
 	} else {
 		stream, ok := s.Streams[frame.StreamID]
 		if !ok {
-			stream = NewStream(frame.StreamID)
+			stream = NewStream(s, frame.StreamID)
 			s.Streams[frame.StreamID] = stream
 		}
 		err := stream.AddStreamFrame(frame)

stream.go

@@ -8,15 +8,18 @@ import (
 
 // A Stream assembles the data from StreamFrames and provides a super-convenient Read-Interface
 type Stream struct {
+	Session        *Session
 	StreamID       protocol.StreamID
 	StreamFrames   chan *frames.StreamFrame
 	CurrentFrame   *frames.StreamFrame
 	ReadPosInFrame int
+	WriteOffset    uint64
 }
 
 // NewStream creates a new Stream
-func NewStream(StreamID protocol.StreamID) *Stream {
+func NewStream(session *Session, StreamID protocol.StreamID) *Stream {
 	return &Stream{
+		Session:      session,
 		StreamID:     StreamID,
 		StreamFrames: make(chan *frames.StreamFrame, 8), // ToDo: add config option for this number
 	}
@@ -50,6 +53,20 @@ func (s *Stream) Read(p []byte) (int, error) {
 	return bytesRead, nil
 }
 
+func (s *Stream) Write(p []byte) (int, error) {
+	frame := &frames.StreamFrame{
+		StreamID: s.StreamID,
+		Offset:   s.WriteOffset,
+		Data:     p,
+	}
+	err := s.Session.SendFrames([]frames.Frame{frame})
+	if err != nil {
+		return 0, err
+	}
+	s.WriteOffset += uint64(len(p))
+	return len(p), nil
+}
+
 // AddStreamFrame adds a new stream frame
 func (s *Stream) AddStreamFrame(frame *frames.StreamFrame) error {
 	s.StreamFrames <- frame