string.go
func StringSHA1Base64(data string) string {
	hash := sha1.Sum([]byte(data))
	return base64.StdEncoding.EncodeToString(hash[:])
}
func StringSHA1Base64(data string) string {
	hash := sha1.Sum([]byte(data))
	return base64.StdEncoding.EncodeToString(hash[:])
}
// StringSHA1Base64 returns the base64 encoded SHA1 hash of data