convert []byte to ascii

byte_to_ascii.go

package main

import (
	"fmt"
	"strconv"
)

func main() {
	// a := map[string]interface{}{
	// "中文": map[string]interface{}{
	// "test\"": "aaa中文aaa",
	// },
	// "aaa": []string{
	// "中文", "english",
	// },
	// }

	// b, _ := json.Marshal(a)
	b := []byte(`
{
  "code": 200,
  "data": {
    "user_name": "测试\'用\"户"
  },
  "中文": ["中文"],
  "message": "ok",
}
	`)

	var bb []byte
	var start bool
	buffer := make([]byte, 0, 1024)
	for i := range b {
		if b[i] == '"' {
			if start && i != 0 {
				// check escape
				if b[i-1] != '\\' {
					// end
					s := strconv.QuoteToASCII(string(buffer))
					bbb := []byte(s)
					if len(bbb) > 0 {
						bbb = bbb[1:]
						bb = append(bb, bbb...)
						buffer = buffer[0:0]
					}
					start = false
					continue
				}
			} else {
				start = true
				bb = append(bb, b[i])
				continue
			}
		}
		if start {
			buffer = append(buffer, b[i])
		} else {
			bb = append(bb, b[i])
		}
	}
	fmt.Println(string(bb))
	fmt.Println(string(b))
}