package utils
import (
"crypto/md5"
"encoding/base64"
"encoding/hex"
"strings"
)
// DecodeBase64 解密 Base64 编码的字符串
func DecodeBase64(encoded string) (string, error) {
decodedBytes, err := base64.StdEncoding.DecodeString(encoded)
if err != nil {
return "", err
}
return string(decodedBytes), nil
}
func MustDecodeBase64(encoded string) string {
decodedBytes, err := base64.StdEncoding.DecodeString(encoded)
if err != nil {
return ""
}
// 去除多余的换行符
decodedString := strings.TrimSpace(string(decodedBytes))
return decodedString
}
func EncodeBase64(str string) string {
return base64.StdEncoding.EncodeToString([]byte(str))
}
func UrlSafeBase64Encode(s string) string {
encoded := base64.URLEncoding.EncodeToString([]byte(s))
// 去掉填充的等号，使其更URL安全
encoded = strings.TrimRight(encoded, "=")
return encoded
}
func UrlSafeBase64Decode(s string) (string, error) {
// 补等号
if m := len(s) % 4; m != 0 {
s += strings.Repeat("=", 4-m)
}
decodedBytes, err := base64.URLEncoding.DecodeString(s)
if err != nil {
return "", err
}
return string(decodedBytes), nil
}
// MD5Hex 中文函数注释：对输入字符串计算 MD5，并返回 32 位小写十六进制字符串。
func MD5Hex(s string) string {
sum := md5.Sum([]byte(s))
return hex.EncodeToString(sum[:])
}
