43 lines
No EOL
1.1 KiB
Go
43 lines
No EOL
1.1 KiB
Go
// Copyright (c) 2023-2024 Onur Cinar.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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// https://github.com/cinar/checker
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package v2
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import (
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"reflect"
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"regexp"
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)
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const (
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// nameFQDN is the name of the FQDN check.
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nameFQDN = "fqdn"
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)
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var (
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// ErrNotFQDN indicates that the given value is not a valid FQDN.
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ErrNotFQDN = NewCheckError("FQDN")
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// fqdnRegex is the regular expression for validating FQDN.
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fqdnRegex = regexp.MustCompile(`^(?:[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?\.)+[a-zA-Z]{2,}$`)
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)
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// IsFQDN checks if the value is a valid fully qualified domain name (FQDN).
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func IsFQDN(value string) (string, error) {
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if !fqdnRegex.MatchString(value) {
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return value, ErrNotFQDN
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}
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return value, nil
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}
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// checkFQDN checks if the value is a valid fully qualified domain name (FQDN).
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func checkFQDN(value reflect.Value) (reflect.Value, error) {
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_, err := IsFQDN(value.Interface().(string))
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return value, err
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}
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// makeFQDN makes a checker function for the FQDN checker.
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func makeFQDN(_ string) CheckFunc[reflect.Value] {
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return checkFQDN
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} |