add bytes codec, still unused

codec/bytes/bytes.go

@@ -0,0 +1,58 @@
+// Package bytes provides a bytes codec which does not encode or decode anything
+package bytes
+
+import (
+	"fmt"
+	"io"
+	"io/ioutil"
+
+	"github.com/micro/go-micro/codec"
+)
+
+type Codec struct {
+	Conn io.ReadWriteCloser
+}
+
+func (c *Codec) ReadHeader(m *codec.Message, t codec.MessageType) error {
+	return nil
+}
+
+func (c *Codec) ReadBody(b interface{}) error {
+	v, ok := b.(*[]byte)
+	if !ok {
+		return fmt.Errorf("failed to read body: %v is not type of *[]byte", b)
+	}
+
+	// read bytes
+	buf, err := ioutil.ReadAll(c.Conn)
+	if err != nil {
+		return err
+	}
+
+	// set bytes
+	*v = buf
+	return nil
+}
+
+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)
+	}
+	_, err := c.Conn.Write(*v)
+	return err
+}
+
+func (c *Codec) Close() error {
+	return c.Conn.Close()
+}
+
+func (c *Codec) String() string {
+	return "bytes"
+}
+
+func NewCodec(c io.ReadWriteCloser) codec.Codec {
+	return &Codec{
+		Conn: c,
+	}
+}