Add client response

client/client.go

@@ -62,11 +62,19 @@ type Response interface {
 
 // Stream is the inteface for a bidirectional synchronous stream
 type Stream interface {
+	// Context for the stream
 	Context() context.Context
+	// The request made
 	Request() Request
+	// The response read
+	Response() Response
+	// Send will encode and send a request
 	Send(interface{}) error
+	// Recv will decode and read a response
 	Recv(interface{}) error
+	// Error returns the stream error
 	Error() error
+	// Close closes the stream
 	Close() error
 }
 

client/rpc_client.go

@@ -92,12 +92,19 @@ func (r *rpcClient) call(ctx context.Context, address string, req Request, resp
 
 	seq := atomic.LoadUint64(&r.seq)
 	atomic.AddUint64(&r.seq, 1)
+	codec := newRpcCodec(msg, c, cf)
+
+	rsp := &rpcResponse{
+		socket: c,
+		codec:  codec,
+	}
 
 	stream := &rpcStream{
 		context:  ctx,
 		request:  req,
+		response: rsp,
+		codec:    codec,
 		closed:   make(chan bool),
-		codec:   newRpcCodec(msg, c, cf),
 		id:       fmt.Sprintf("%v", seq),
 	}
 	defer stream.Close()
@@ -174,9 +181,17 @@ func (r *rpcClient) stream(ctx context.Context, address string, req Request, opt
 		return nil, errors.InternalServerError("go.micro.client", "connection error: %v", err)
 	}
 
+	codec := newRpcCodec(msg, c, cf)
+
+	rsp := &rpcResponse{
+		socket: c,
+		codec:  codec,
+	}
+
 	stream := &rpcStream{
 		context:  ctx,
 		request:  req,
+		response: rsp,
 		closed:   make(chan bool),
 		codec:    newRpcCodec(msg, c, cf),
 	}

client/rpc_codec.go

@@ -88,41 +88,54 @@ func newRpcCodec(req *transport.Message, client transport.Client, c codec.NewCod
 	return r
 }
 
-func (c *rpcCodec) Write(wm *codec.Message, body interface{}) error {
+func (c *rpcCodec) Write(m *codec.Message, body interface{}) error {
 	c.buf.wbuf.Reset()
 
-	m := &codec.Message{
-		Id:       wm.Id,
-		Target:   wm.Target,
-		Endpoint: wm.Endpoint,
-		Type:     codec.Request,
-		Header: map[string]string{
-			"X-Micro-Id":       wm.Id,
-			"X-Micro-Service":  wm.Target,
-			"X-Micro-Endpoint": wm.Endpoint,
-		},
+	// create header
+	if m.Header == nil {
+		m.Header = map[string]string{}
 	}
 
+	// copy original header
+	for k, v := range c.req.Header {
+		m.Header[k] = v
+	}
+
+	// set the mucp headers
+	m.Header["X-Micro-Id"] = m.Id
+	m.Header["X-Micro-Service"] = m.Target
+	m.Header["X-Micro-Endpoint"] = m.Endpoint
+
+	// if body is bytes don't encode
+	if body != nil {
+		b, ok := body.([]byte)
+		if ok {
+			// set body
+			m.Body = b
+			body = nil
+		}
+	}
+
+	if len(m.Body) == 0 {
+		// write to codec
 		if err := c.codec.Write(m, body); err != nil {
 			return errors.InternalServerError("go.micro.client.codec", err.Error())
 		}
-
 		// set body
-	if len(wm.Body) > 0 {
-		c.req.Body = wm.Body
-	} else {
-		c.req.Body = c.buf.wbuf.Bytes()
+		m.Body = c.buf.wbuf.Bytes()
 	}
 
-	// set header
-	for k, v := range m.Header {
-		c.req.Header[k] = v
+	// create new transport message
+	msg := transport.Message{
+		Header: m.Header,
+		Body:   m.Body,
 	}
 
 	// send the request
-	if err := c.client.Send(c.req); err != nil {
+	if err := c.client.Send(&msg); err != nil {
 		return errors.InternalServerError("go.micro.client.transport", err.Error())
 	}
+
 	return nil
 }
 

client/rpc_response.go

@@ -12,7 +12,7 @@ type rpcResponse struct {
 	codec  codec.Codec
 }
 
-func (r *rpcResponse) Codec() codec.Writer {
+func (r *rpcResponse) Codec() codec.Reader {
 	return r.codec
 }
 

client/rpc_stream.go

@@ -15,6 +15,7 @@ type rpcStream struct {
 	closed   chan bool
 	err      error
 	request  Request
+	response Response
 	codec    codec.Codec
 	context  context.Context
 }
@@ -36,6 +37,10 @@ func (r *rpcStream) Request() Request {
 	return r.request
 }
 
+func (r *rpcStream) Response() Response {
+	return r.response
+}
+
 func (r *rpcStream) Send(msg interface{}) error {
 	r.Lock()
 	defer r.Unlock()

codec/bytes/bytes.go

@@ -35,11 +35,17 @@ func (c *Codec) ReadBody(b interface{}) error {
 }
 
 func (c *Codec) Write(m *codec.Message, b interface{}) error {
-	v, ok := b.(*[]byte)
-	if !ok {
-		return fmt.Errorf("failed to write: %v is not type of *[]byte", b)
+	var v []byte
+	switch b.(type) {
+	case *[]byte:
+		ve := b.(*[]byte)
+		v = *ve
+	case []byte:
+		v = b.([]byte)
+	default:
+		return fmt.Errorf("failed to write: %v is not type of *[]byte or []byte", b)
 	}
-	_, err := c.Conn.Write(*v)
+	_, err := c.Conn.Write(v)
 	return err
 }
 

codec/bytes/marshaler.go

@@ -13,6 +13,9 @@ type Message struct {
 
 func (n Marshaler) Marshal(v interface{}) ([]byte, error) {
 	switch v.(type) {
+	case *[]byte:
+		ve := v.(*[]byte)
+		return *ve, nil
 	case []byte:
 		return v.([]byte), nil
 	case *Message:

server/rpc_codec.go

@@ -99,6 +99,9 @@ func (c *rpcCodec) ReadHeader(r *codec.Message, t codec.MessageType) error {
 		m.Header = tm.Header
 		// set the message body
 		m.Body = tm.Body
+
+		// set req
+		c.req = &tm
 	}
 
 	// no longer first read
@@ -120,6 +123,10 @@ func (c *rpcCodec) ReadHeader(r *codec.Message, t codec.MessageType) error {
 }
 
 func (c *rpcCodec) ReadBody(b interface{}) error {
+	// don't read empty body
+	if len(c.req.Body) == 0 {
+		return nil
+	}
 	return c.codec.ReadBody(b)
 }
 
@@ -132,7 +139,11 @@ func (c *rpcCodec) Write(r *codec.Message, b interface{}) error {
 		Id:       r.Id,
 		Error:    r.Error,
 		Type:     r.Type,
-		Header:   map[string]string{},
+		Header:   r.Header,
+	}
+
+	if m.Header == nil {
+		m.Header = map[string]string{}
 	}
 
 	// set request id
@@ -160,7 +171,7 @@ func (c *rpcCodec) Write(r *codec.Message, b interface{}) error {
 	// if we have encoded data just send it
 	if len(r.Body) > 0 {
 		body = r.Body
-		// write to the body
+		// write the body to codec
 	} else if err := c.codec.Write(m, b); err != nil {
 		c.buf.wbuf.Reset()