add vendor

vendor/github.com/gin-gonic/gin/render/json.go

@@ -0,0 +1,41 @@
+// Copyright 2014 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 (
+	"encoding/json"
+	"net/http"
+)
+
+type (
+	JSON struct {
+		Data interface{}
+	}
+
+	IndentedJSON struct {
+		Data interface{}
+	}
+)
+
+var jsonContentType = []string{"application/json; charset=utf-8"}
+
+func (r JSON) Render(w http.ResponseWriter) error {
+	return WriteJSON(w, r.Data)
+}
+
+func (r IndentedJSON) Render(w http.ResponseWriter) error {
+	writeContentType(w, jsonContentType)
+	jsonBytes, err := json.MarshalIndent(r.Data, "", "    ")
+	if err != nil {
+		return err
+	}
+	w.Write(jsonBytes)
+	return nil
+}
+
+func WriteJSON(w http.ResponseWriter, obj interface{}) error {
+	writeContentType(w, jsonContentType)
+	return json.NewEncoder(w).Encode(obj)
+}