major codec upgrade

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

codec/noop.go

@@ -0,0 +1,93 @@
+package codec
+
+import (
+	"io"
+	"io/ioutil"
+)
+
+type noopCodec struct {
+}
+
+// Frame gives us the ability to define raw data to send over the pipes
+type Frame struct {
+	Data []byte
+}
+
+func (c *noopCodec) ReadHeader(conn io.ReadWriter, m *Message, t MessageType) error {
+	return nil
+}
+
+func (c *noopCodec) ReadBody(conn io.ReadWriter, b interface{}) error {
+	// read bytes
+	buf, err := ioutil.ReadAll(conn)
+	if err != nil {
+		return err
+	}
+
+	if b == nil {
+		return nil
+	}
+
+	switch v := b.(type) {
+	case []byte:
+		v = buf
+	case *[]byte:
+		*v = buf
+	case *Frame:
+		v.Data = buf
+	default:
+		return ErrInvalidMessage
+	}
+
+	return nil
+}
+
+func (c *noopCodec) Write(conn io.ReadWriter, m *Message, b interface{}) error {
+	var v []byte
+	switch vb := b.(type) {
+	case nil:
+		return nil
+	case *Frame:
+		v = vb.Data
+	case *[]byte:
+		v = *vb
+	case []byte:
+		v = vb
+	default:
+		return ErrInvalidMessage
+	}
+	_, err := conn.Write(v)
+	return err
+}
+
+func (c *noopCodec) String() string {
+	return "noop"
+}
+
+func NewCodec() Codec {
+	return &noopCodec{}
+}
+
+func (n *noopCodec) Marshal(v interface{}) ([]byte, error) {
+	switch ve := v.(type) {
+	case *[]byte:
+		return *ve, nil
+	case []byte:
+		return ve, nil
+	case *Message:
+		return ve.Body, nil
+	}
+	return nil, ErrInvalidMessage
+}
+
+func (n *noopCodec) Unmarshal(d []byte, v interface{}) error {
+	switch ve := v.(type) {
+	case []byte:
+		ve = d
+	case *[]byte:
+		*ve = d
+	case *Message:
+		ve.Body = d
+	}
+	return ErrInvalidMessage
+}