json.Marshal 特殊 html 字符被转义
go 语言提供了 json 的编解码包，json 字符串作为参数值传输时发现，json.Marshal 生成 json 特殊字符 <、>、&会被转义。
ype Test struct {
Content string
}
func main() {
t := new(Test)
t.Content = “http://www.baidu.com?id=123&test=1”
jsonByte, _ := json.Marshal(t)
fmt.Println(string(jsonByte))
}
{“Content”:”http://www.baidu.com?id=123\u0026test=1”}
Process finished with exit code 0
GoDoc 描述
String values encode as JSON strings coerced to valid UTF-8,
replacing invalid bytes with the Unicode replacement rune.
The angle brackets “<” and “>” are escaped to “\u003c” and “\u003e”
to keep some browsers from misinterpreting JSON output as HTML.
Ampersand “&” is also escaped to “\u0026” for the same reason.
This escaping can be disabled using an Encoder that had SetEscapeHTML(false) alled on it.
json.Marshal 默认 escapeHtml 为 true,会转义 <、>、&
func Marshal(v interface{}) ([]byte, error) {
e := &encodeState{}
err := e.marshal(v, encOpts{escapeHTML: true})
if err != nil {
return nil, err
}
return e.Bytes(), nil
}
解决方案
方法一：
content = strings.Replace(content, “\u003c”, “<”, -1)
content = strings.Replace(content, “\u003e”, “>”, -1)
content = strings.Replace(content, “\u0026”, “&”, -1)
这种方式比较直接，硬性字符串替换。比较憨厚
方法二：
文档中写到This escaping can be disabled using an Encoder that had SetEscapeHTML(false) alled on it.
我们先创建一个 buffer 用于存储 json
创建一个 jsonencoder
设置 html 编码为 false
type Test struct {
Content string
}
func main() {
t := new(Test)
t.Content = “http://www.baidu.com?id=123&test=1”
bf := bytes.NewBuffer([]byte{})
jsonEncoder := json.NewEncoder(bf)
jsonEncoder.SetEscapeHTML(false)
jsonEncoder.Encode(t)
fmt.Println(bf.String())
}
{“Content”:”http://www.baidu.com?id=123&test=1”}
Process finished with exit code 0
https://ld246.com/article/1524558037151
https://github.com/golang/go/issues/28453
encoding/json: add Encoder.DisableHTMLEscaping This provides a way to disable the escaping of <, >, and & in JSON strings.
The relevant function is
func (*Encoder) SetEscapeHTML
That should be applied to a Encoder.
enc := json.NewEncoder(os.Stdout)
enc.SetEscapeHTML(false)
https://stackoverflow.com/questions/24656624/how-to-display-a-character-instead-of-ascii
https://blog.csdn.net/lgh1700/article/details/104522878
https://blog.csdn.net/lgh1700/article/details/104522878
