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<?php |
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declare(strict_types=1); |
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namespace Shlinkio\Shlink\Core\Util; |
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use Fig\Http\Message\RequestMethodInterface; |
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use Fig\Http\Message\StatusCodeInterface; |
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use GuzzleHttp\ClientInterface; |
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use GuzzleHttp\Exception\GuzzleException; |
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use GuzzleHttp\RequestOptions; |
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use Shlinkio\Shlink\Core\Exception\InvalidUrlException; |
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use Zend\Diactoros\Uri; |
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use function Functional\contains; |
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use function idn_to_ascii; |
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use const IDNA_DEFAULT; |
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use const INTL_IDNA_VARIANT_UTS46; |
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class UrlValidator implements UrlValidatorInterface, RequestMethodInterface, StatusCodeInterface |
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{ |
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private const MAX_REDIRECTS = 15; |
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/** @var ClientInterface */ |
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private $httpClient; |
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public function __construct(ClientInterface $httpClient) |
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{ |
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$this->httpClient = $httpClient; |
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} |
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/** |
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* @throws InvalidUrlException |
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*/ |
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public function validateUrl(string $url): void |
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{ |
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$this->doValidateUrl($url); |
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} |
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/** |
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* @throws InvalidUrlException |
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*/ |
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private function doValidateUrl(string $url, int $redirectNum = 1): void |
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{ |
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// FIXME Guzzle is about to add support for this https://github.com/guzzle/guzzle/pull/2286 |
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// Remove custom implementation and manual redirect handling when Guzzle's PR is merged |
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$uri = new Uri($url); |
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$originalHost = $uri->getHost(); |
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$normalizedHost = idn_to_ascii($originalHost, IDNA_DEFAULT, INTL_IDNA_VARIANT_UTS46); |
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if ($originalHost !== $normalizedHost) { |
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$uri = $uri->withHost($normalizedHost); |
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} |
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try { |
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$resp = $this->httpClient->request(self::METHOD_GET, (string) $uri, [ |
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// RequestOptions::ALLOW_REDIRECTS => ['max' => self::MAX_REDIRECTS], |
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RequestOptions::ALLOW_REDIRECTS => false, |
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]); |
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if ($redirectNum < self::MAX_REDIRECTS && $this->statusIsRedirect($resp->getStatusCode())) { |
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$this->doValidateUrl($resp->getHeaderLine('Location'), $redirectNum + 1); |
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} |
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} catch (GuzzleException $e) { |
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throw InvalidUrlException::fromUrl($url, $e); |
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} |
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} |
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private function statusIsRedirect(int $statusCode): bool |
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{ |
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return contains([self::STATUS_MOVED_PERMANENTLY, self::STATUS_FOUND], $statusCode); |
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} |
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} |
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shlinkio /
shlink
