<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Validator\Constraints;
use Symfony\Component\Validator\Constraint;
use Symfony\Component\Validator\ConstraintValidator;
use Symfony\Component\Validator\Exception\UnexpectedTypeException;
use Symfony\Component\Validator\Exception\UnexpectedValueException;
/**
* @author Dmitrii Poddubnyi <dpoddubny@gmail.com>
*/
class HostnameValidator extends ConstraintValidator
{
/**
* https://tools.ietf.org/html/rfc2606.
*/
private const RESERVED_TLDS = [
'example',
'invalid',
'localhost',
'test',
];
public function validate($value, Constraint $constraint)
{
if (!$constraint instanceof Hostname) {
throw new UnexpectedTypeException($constraint, Hostname::class);
}
if (null === $value || '' === $value) {
return;
}
if (!is_scalar($value) && !(\is_object($value) && method_exists($value, '__toString'))) {
throw new UnexpectedValueException($value, 'string');
}
$value = (string) $value;
if ('' === $value) {
return;
}
if (!$this->isValid($value) || ($constraint->requireTld && !$this->hasValidTld($value))) {
$this->context->buildViolation($constraint->message)
->setParameter('{{ value }}', $this->formatValue($value))
->setCode(Hostname::INVALID_HOSTNAME_ERROR)
->addViolation();
}
}
private function isValid(string $domain): bool
{
return false !== filter_var($domain, \FILTER_VALIDATE_DOMAIN, \FILTER_FLAG_HOSTNAME);
}
private function hasValidTld(string $domain): bool
{
return false !== strpos($domain, '.') && !\in_array(substr($domain, strrpos($domain, '.') + 1), self::RESERVED_TLDS, true);
}
}