gin/render/json.go

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// 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 (
"bytes"
"net/http"
"github.com/json-iterator/go"
)
var json = jsoniter.ConfigCompatibleWithStandardLibrary
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type JSON struct {
Data interface{}
}
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type IndentedJSON struct {
Data interface{}
}
type SecureJSON struct {
Prefix string
Data interface{}
}
type SecureJSONPrefix string
var jsonContentType = []string{"application/json; charset=utf-8"}
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func (r JSON) Render(w http.ResponseWriter) (err error) {
if err = WriteJSON(w, r.Data); err != nil {
panic(err)
}
return
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}
func (r JSON) WriteContentType(w http.ResponseWriter) {
writeContentType(w, jsonContentType)
}
func WriteJSON(w http.ResponseWriter, obj interface{}) error {
writeContentType(w, jsonContentType)
jsonBytes, err := json.Marshal(obj)
if err != nil {
return err
}
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w.Write(jsonBytes)
return nil
}
func (r IndentedJSON) Render(w http.ResponseWriter) error {
r.WriteContentType(w)
jsonBytes, err := json.MarshalIndent(r.Data, "", " ")
if err != nil {
return err
}
w.Write(jsonBytes)
return nil
}
func (r IndentedJSON) WriteContentType(w http.ResponseWriter) {
writeContentType(w, jsonContentType)
}
func (r SecureJSON) Render(w http.ResponseWriter) error {
r.WriteContentType(w)
jsonBytes, err := json.Marshal(r.Data)
if err != nil {
return err
}
// if the jsonBytes is array values
if bytes.HasPrefix(jsonBytes, []byte("[")) && bytes.HasSuffix(jsonBytes, []byte("]")) {
w.Write([]byte(r.Prefix))
}
w.Write(jsonBytes)
return nil
}
func (r SecureJSON) WriteContentType(w http.ResponseWriter) {
writeContentType(w, jsonContentType)
}