Yiisoft\Validator\Rule\UrlHandler

Complexity

Total Complexity

10

Size/Duplication

Total Lines	46
Duplicated Lines	0 %

Test Coverage

Coverage

100%

Importance

Changes	1
Bugs	0	Features	0

3 Methods

Rating	Name	Duplication	Size	Complexity
A	convertIdn()	0	10	2
A	validate()	0	25	6
A	idnToAscii()	0	5	2

<?php

declare(strict_types=1);

namespace Yiisoft\Validator\Rule;

use Yiisoft\Validator\Exception\UnexpectedRuleException;
use Yiisoft\Validator\Result;
use Yiisoft\Validator\RuleHandlerInterface;
use Yiisoft\Validator\ValidationContext;

use function is_string;
use function strlen;

/**
 * Validates that the value is a valid HTTP or HTTPS URL.
 *
 * Note that this rule only checks if the URL scheme and host part are correct.
 * It does not check the remaining parts of a URL.
 */
final class UrlHandler implements RuleHandlerInterface
{
    public function validate(mixed $value, object $rule, ValidationContext $context): Result
    {
        if (!$rule instanceof Url) {
            throw new UnexpectedRuleException(Url::class, $rule);
        }

        $result = new Result();

        // make sure the length is limited to avoid DOS attacks
        if (is_string($value) && strlen($value) < 2000) {
            if ($rule->isEnableIDN()) {
                $value = $this->convertIdn($value);
            }

            if (preg_match($rule->getPattern(), $value)) {
                return $result;
            }
        }

        $result->addError(
            message: $rule->getMessage(),
            parameters: ['value' => $value]
        );

        return $result;
    }

    private function idnToAscii(string $idn): string
    {
        $result = idn_to_ascii($idn, 0, INTL_IDNA_VARIANT_UTS46);

        return $result === false ? '' : $result;
    }

    private function convertIdn(string $value): string
    {
        if (!str_contains($value, '://')) {
            return $this->idnToAscii($value);
        }

        return preg_replace_callback(
            '/:\/\/([^\/]+)/',
            fn ($matches) => '://' . $this->idnToAscii($matches[1]),
            $value
        );
    }
}