Merge pull request #273 from iamqizhao/master

handle empty data frame

transport/http2_client.go

@@ -529,6 +529,7 @@ func (t *http2Client) handleData(f *http2.DataFrame) {
 		return
 	}
 	size := len(f.Data())
+	if size > 0 {
 		if err := s.fc.onData(uint32(size)); err != nil {
 			if _, ok := err.(ConnectionError); ok {
 				t.notifyError(err)
@@ -553,7 +554,7 @@ func (t *http2Client) handleData(f *http2.DataFrame) {
 		data := make([]byte, size)
 		copy(data, f.Data())
 		s.write(recvMsg{data: data})
-
+	}
 	// The server has closed the stream without sending trailers.  Record that
 	// the read direction is closed, and set the status appropriately.
 	if f.FrameHeader.Flags.Has(http2.FlagDataEndStream) {

transport/http2_server.go

@@ -322,6 +322,7 @@ func (t *http2Server) handleData(f *http2.DataFrame) {
 		return
 	}
 	size := len(f.Data())
+	if size > 0 {
 		if err := s.fc.onData(uint32(size)); err != nil {
 			if _, ok := err.(ConnectionError); ok {
 				grpclog.Printf("transport: http2Server %v", err)
@@ -338,6 +339,7 @@ func (t *http2Server) handleData(f *http2.DataFrame) {
 		data := make([]byte, size)
 		copy(data, f.Data())
 		s.write(recvMsg{data: data})
+	}
 	if f.Header().Flags.Has(http2.FlagDataEndStream) {
 		// Received the end of stream from the client.
 		s.mu.Lock()