147 lines
2.8 KiB
Go
147 lines
2.8 KiB
Go
// Copyright 2014 Manu Martinez-Almeida. All rights reserved.
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// Use of this source code is governed by a MIT style
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// license that can be found in the LICENSE file.
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package render
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import (
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"bytes"
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"fmt"
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"html/template"
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"net/http"
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"github.com/gin-gonic/gin/json"
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)
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type JSON struct {
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Data interface{}
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}
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type IndentedJSON struct {
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Data interface{}
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}
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type SecureJSON struct {
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Prefix string
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Data interface{}
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}
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type JsonpJSON struct {
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Callback string
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Data interface{}
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}
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type AsciiJSON struct {
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Data interface{}
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}
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type SecureJSONPrefix string
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var jsonContentType = []string{"application/json; charset=utf-8"}
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var jsonpContentType = []string{"application/javascript; charset=utf-8"}
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var jsonAsciiContentType = []string{"application/json"}
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func (r JSON) Render(w http.ResponseWriter) (err error) {
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if err = WriteJSON(w, r.Data); err != nil {
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panic(err)
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}
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return
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}
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func (r JSON) WriteContentType(w http.ResponseWriter) {
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writeContentType(w, jsonContentType)
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}
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func WriteJSON(w http.ResponseWriter, obj interface{}) error {
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writeContentType(w, jsonContentType)
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jsonBytes, err := json.Marshal(obj)
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if err != nil {
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return err
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}
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w.Write(jsonBytes)
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return nil
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}
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func (r IndentedJSON) Render(w http.ResponseWriter) error {
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r.WriteContentType(w)
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jsonBytes, err := json.MarshalIndent(r.Data, "", " ")
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if err != nil {
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return err
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}
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w.Write(jsonBytes)
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return nil
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}
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func (r IndentedJSON) WriteContentType(w http.ResponseWriter) {
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writeContentType(w, jsonContentType)
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}
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func (r SecureJSON) Render(w http.ResponseWriter) error {
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r.WriteContentType(w)
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jsonBytes, err := json.Marshal(r.Data)
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if err != nil {
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return err
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}
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// if the jsonBytes is array values
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if bytes.HasPrefix(jsonBytes, []byte("[")) && bytes.HasSuffix(jsonBytes, []byte("]")) {
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w.Write([]byte(r.Prefix))
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}
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w.Write(jsonBytes)
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return nil
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}
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func (r SecureJSON) WriteContentType(w http.ResponseWriter) {
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writeContentType(w, jsonContentType)
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}
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func (r JsonpJSON) Render(w http.ResponseWriter) (err error) {
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r.WriteContentType(w)
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ret, err := json.Marshal(r.Data)
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if err != nil {
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return err
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}
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if r.Callback == "" {
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w.Write(ret)
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return nil
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}
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callback := template.JSEscapeString(r.Callback)
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w.Write([]byte(callback))
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w.Write([]byte("("))
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w.Write(ret)
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w.Write([]byte(")"))
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return nil
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}
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func (r JsonpJSON) WriteContentType(w http.ResponseWriter) {
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writeContentType(w, jsonpContentType)
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}
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func (r AsciiJSON) Render(w http.ResponseWriter) (err error) {
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r.WriteContentType(w)
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ret, err := json.Marshal(r.Data)
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if err != nil {
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return err
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}
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var buffer bytes.Buffer
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for _, r := range string(ret) {
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cvt := ""
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if r < 128 {
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cvt = string(r)
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} else {
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cvt = fmt.Sprintf("\\u%04x", int64(r))
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}
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buffer.WriteString(cvt)
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}
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w.Write(buffer.Bytes())
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return nil
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}
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func (r AsciiJSON) WriteContentType(w http.ResponseWriter) {
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writeContentType(w, jsonAsciiContentType)
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}
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