Golang一个简单的密码强度验证

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^((?=.*\d)|(?=.*[\\\^\$\.\*\+\?\{\}\(\)\[\]\|]+))(?=.*[a-z])(?=.*[A-Z]).{6, 14}$

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func main() {
	reg := `^((?=.*\d)|(?=.*[\\\^\$\.\*\+\?\{\}\(\)\[\]\|]+))(?=.*[a-z])(?=.*[A-Z]).{6, 14}$`

	matchString, err := regexp.MatchString(reg, "123456")
	if err != nil {
		log.Println("err is ", err)
	}
	log.Println("Res is ", matchString)
}

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2020/09/15 21:51:46 err is  error parsing regexp: invalid or unsupported Perl syntax: `(?=`

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func VerifyPasswordRule(str string, minLen, maxLen int) error {
	var (
		isUpper   = false
		isLower   = false
		isNumber  = false
		isSpecial = false
	)

	if len(str) < minLen || len(str) > maxLen {
		return errors.New("The password must contain uppercase and lowercase letters, numbers or punctuation, and must be 6-14 digits long. ")
	}

	for _, s := range str {
		switch {
		case unicode.IsUpper(s):
			isUpper = true
		case unicode.IsLower(s):
			isLower = true
		case unicode.IsNumber(s):
			isNumber = true
		case unicode.IsPunct(s) || unicode.IsSymbol(s):
			isSpecial = true
		default:
		}
	}

	if (isUpper && isLower) && (isNumber || isSpecial) {
		return nil
	}
	return errors.New("The password must contain uppercase and lowercase letters, numbers or punctuation, and must be 6-14 digits long. ")
}

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// 正序环视
(?<=\d)(?=(\d{3})+$)

// 逆序环视
(?=(\d{3})+$)(?<=\d)