Added support for MessagePack binding and rendering (#808)

Added deps to vendor.json and fixed rendering bug

render/msgpack.go

@@ -0,0 +1,31 @@
+// Copyright 2017 Manu Martinez-Almeida.  All rights reserved.
+// Use of this source code is governed by a MIT style
+// license that can be found in the LICENSE file.
+
+package render
+
+import (
+	"net/http"
+
+	"github.com/ugorji/go/codec"
+)
+
+type MsgPack struct {
+	Data interface{}
+}
+
+var msgpackContentType = []string{"application/msgpack; charset=utf-8"}
+
+func (r MsgPack) WriteContentType(w http.ResponseWriter) {
+	writeContentType(w, msgpackContentType)
+}
+
+func (r MsgPack) Render(w http.ResponseWriter) error {
+	return WriteMsgPack(w, r.Data)
+}
+
+func WriteMsgPack(w http.ResponseWriter, obj interface{}) error {
+	writeContentType(w, msgpackContentType)
+	var h codec.Handle = new(codec.MsgpackHandle)
+	return codec.NewEncoder(w, h).Encode(obj)
+}

render/render.go

@@ -22,6 +22,8 @@ var (
 	_ HTMLRender = HTMLDebug{}
 	_ HTMLRender = HTMLProduction{}
 	_ Render     = YAML{}
+	_ Render     = MsgPack{}
+	_ Render     = MsgPack{}
 )
 
 func writeContentType(w http.ResponseWriter, value []string) {

render/render_test.go

@@ -5,17 +5,40 @@
 package render
 
 import (
+	"bytes"
 	"encoding/xml"
 	"html/template"
 	"net/http/httptest"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
+	"github.com/ugorji/go/codec"
 )
 
 // TODO unit tests
 // test errors
 
+func TestRenderMsgPack(t *testing.T) {
+	w := httptest.NewRecorder()
+	data := map[string]interface{}{
+		"foo": "bar",
+	}
+
+	err := (MsgPack{data}).Render(w)
+
+	assert.NoError(t, err)
+
+	h := new(codec.MsgpackHandle)
+	assert.NotNil(t, h)
+	buf := bytes.NewBuffer([]byte{})
+	assert.NotNil(t, buf)
+	err = codec.NewEncoder(buf, h).Encode(data)
+
+	assert.NoError(t, err)
+	assert.Equal(t, w.Body.String(), string(buf.Bytes()))
+	assert.Equal(t, w.Header().Get("Content-Type"), "application/msgpack; charset=utf-8")
+}
+
 func TestRenderJSON(t *testing.T) {
 	w := httptest.NewRecorder()
 	data := map[string]interface{}{