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<?php |
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namespace Nofw\Foundation\Http\Middleware; |
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use Interop\Http\Factory\StreamFactoryInterface; |
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use Interop\Http\ServerMiddleware\DelegateInterface; |
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use Interop\Http\ServerMiddleware\MiddlewareInterface; |
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use Psr\Http\Message\ResponseInterface; |
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use Psr\Http\Message\ServerRequestInterface; |
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/** |
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* @author Márk Sági-Kazár <[email protected]> |
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*/ |
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final class ErrorPageContent implements MiddlewareInterface |
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{ |
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/** |
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* @var \Twig_Environment |
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*/ |
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private $twig; |
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/** |
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* @var StreamFactoryInterface |
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*/ |
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private $streamFactory; |
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public function __construct(\Twig_Environment $twig, StreamFactoryInterface $streamFactory) |
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{ |
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$this->twig = $twig; |
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$this->streamFactory = $streamFactory; |
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} |
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public function process(ServerRequestInterface $request, DelegateInterface $delegate): ResponseInterface |
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{ |
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$response = $delegate->process($request); |
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// If there is an error, but there is no body |
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if ($this->isError($response) && $response->getBody()->getSize() < 1) { |
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if ($this->isHtml($request, $response)) { |
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switch ($response->getStatusCode()) { |
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case 404: |
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$html = $this->twig->render('error/error404.html.twig'); |
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break; |
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default: |
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$html = $this->twig->render('error/error.html.twig', [ |
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'status_code' => $response->getStatusCode(), |
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'reason_phrase' => $response->getReasonPhrase(), |
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]); |
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break; |
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} |
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$body = $this->streamFactory->createStream($html); |
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$body->rewind(); |
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return $response->withBody($body); |
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} |
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} |
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return $response; |
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} |
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/** |
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* Checks if the response is an error one based on the status code. |
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*/ |
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private function isError(ResponseInterface $response): bool |
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{ |
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return $response->getStatusCode() >= 400 && $response->getStatusCode() < 600; |
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} |
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/** |
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* Checks if HTML response is expected by the client. |
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*/ |
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private function isHtml(ServerRequestInterface $request, ResponseInterface $response): bool |
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{ |
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$accept = $request->getHeaderLine('Accept'); |
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$contentType = $response->getHeaderLine('Content-Type'); |
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// TODO: improve negotiation |
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return empty($accept) || |
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stripos($accept, '*') !== false || |
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stripos($accept, 'text/html') !== false || |
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stripos($contentType, 'text/html') !== false |
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; |
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} |
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} |
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nofw /
foundation
