don't marshal frame values

client/rpc_codec.go

@@ -186,32 +186,30 @@ func (c *rpcCodec) Write(m *codec.Message, body interface{}) error {
 
 	// if body is bytes Frame don't encode
 	if body != nil {
-		b, ok := body.(*raw.Frame)
-		if ok {
+		if b, ok := body.(*raw.Frame); ok {
 			// set body
 			m.Body = b.Data
-			body = nil
+		} else {
+			// write to codec
+			if err := c.codec.Write(m, body); err != nil {
+				return errors.InternalServerError("go.micro.client.codec", err.Error())
+			}
+			// set body
+			m.Body = c.buf.wbuf.Bytes()
 		}
 	}
 
-	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
-		m.Body = c.buf.wbuf.Bytes()
-	}
-
 	// create new transport message
 	msg := transport.Message{
 		Header: m.Header,
 		Body:   m.Body,
 	}
+
 	// send the request
 	if err := c.client.Send(&msg); err != nil {
 		return errors.InternalServerError("go.micro.client.transport", err.Error())
 	}
+
 	return nil
 }