1. #urldecode
    2. failDesc := "55So5LqO5pS26ZO25Y%2Bw5Zue6LCD6YCa55%2BlLi4hL1xz"
    3. enEscapeUrl, _ := url.QueryUnescape(failDesc)
    6. #base64 decode
    7. base64.StdEncoding.DecodeString(enEscapeUrl)
    9. #字符串截取 支持中文
    10. func SubString(str string, begin, length int) string {
    11.     fmt.Println("Substring =", str)
    12.     rs := []rune(str)
    13.     lth := len(rs)
    14.     fmt.Printf("begin=%d, end=%d, lth=%d\n", begin, length, lth)
    15.     if begin < 0 {
    16.         begin = 0
    17.     }
    18.     if begin >= lth {
    19.         begin = lth
    20.     }
    21.     end := begin + length
    23.     if end > lth {
    24.         end = lth
    25.     }
    26.     fmt.Printf("begin=%d, end=%d, lth=%d\n", begin, length, lth)
    27.     return string(rs[begin:end])
    28. }