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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"
- "fmt"
- "html/template"
- "net/http"
-
- "github.com/gin-gonic/gin/json"
- )
-
- type JSON struct {
- Data interface{}
- }
-
- type IndentedJSON struct {
- Data interface{}
- }
-
- type SecureJSON struct {
- Prefix string
- Data interface{}
- }
-
- type JsonpJSON struct {
- Callback string
- Data interface{}
- }
-
- type AsciiJSON struct {
- Data interface{}
- }
-
- type SecureJSONPrefix string
-
- var jsonContentType = []string{"application/json; charset=utf-8"}
- var jsonpContentType = []string{"application/javascript; charset=utf-8"}
- var jsonAsciiContentType = []string{"application/json"}
-
- func (r JSON) Render(w http.ResponseWriter) (err error) {
- if err = WriteJSON(w, r.Data); err != nil {
- panic(err)
- }
- return
- }
-
- 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
- }
- 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)
- }
-
- func (r JsonpJSON) Render(w http.ResponseWriter) (err error) {
- r.WriteContentType(w)
- ret, err := json.Marshal(r.Data)
- if err != nil {
- return err
- }
-
- if r.Callback == "" {
- w.Write(ret)
- return nil
- }
-
- callback := template.JSEscapeString(r.Callback)
- w.Write([]byte(callback))
- w.Write([]byte("("))
- w.Write(ret)
- w.Write([]byte(")"))
-
- return nil
- }
-
- func (r JsonpJSON) WriteContentType(w http.ResponseWriter) {
- writeContentType(w, jsonpContentType)
- }
-
- func (r AsciiJSON) Render(w http.ResponseWriter) (err error) {
- r.WriteContentType(w)
- ret, err := json.Marshal(r.Data)
- if err != nil {
- return err
- }
-
- var buffer bytes.Buffer
- for _, r := range string(ret) {
- cvt := ""
- if r < 128 {
- cvt = string(r)
- } else {
- cvt = fmt.Sprintf("\\u%04x", int64(r))
- }
- buffer.WriteString(cvt)
- }
-
- w.Write(buffer.Bytes())
- return nil
- }
-
- func (r AsciiJSON) WriteContentType(w http.ResponseWriter) {
- writeContentType(w, jsonAsciiContentType)
- }
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