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<?php |
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declare(strict_types=1); |
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namespace Application\Handler; |
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use Application\Repository\CardRepository; |
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use Application\Service\ImageResizer; |
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use Ecodev\Felix\Handler\AbstractHandler; |
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use Laminas\Diactoros\Response; |
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use Laminas\Diactoros\Response\RedirectResponse; |
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use Psr\Http\Message\ResponseInterface; |
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use Psr\Http\Message\ServerRequestInterface; |
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class ImageHandler extends AbstractHandler |
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{ |
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public function __construct( |
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private readonly CardRepository $cardRepository, |
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private readonly ImageResizer $imageResizer, |
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) { |
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} |
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/** |
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* Serve an image from disk, with optional dynamic resizing. |
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*/ |
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public function handle(ServerRequestInterface $request): ResponseInterface |
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{ |
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$id = $request->getAttribute('id'); |
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$card = $this->cardRepository->findOneById($id); |
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if (!$card) { |
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return $this->createError("Card $id not found in database"); |
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} |
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$path = $card->getPath(); |
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if (!is_readable($path)) { |
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return $this->createError("Image for card $id not found on disk, or not readable"); |
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} |
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$maxHeight = (int) $request->getAttribute('maxHeight'); |
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if ($maxHeight) { |
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$accept = $request->getHeaderLine('accept'); |
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$useWebp = str_contains($accept, 'image/webp'); |
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$resizeNeeded = $this->imageResizer->isResizeNeeded($card, $maxHeight, $useWebp); |
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$resizeSpecified = array_key_exists('resize', $request->getQueryParams()); |
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if ($resizeNeeded && !$resizeSpecified) { |
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// If resize is needed, user must specify a specific query params. |
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// This allow to configure server load balance, but also work |
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// without any special configuration if not needed. |
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// Resizing operation is ressource intensive and could lead to block |
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// the server if not properly configured. |
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return new RedirectResponse($this->constructRedirectURI(), 302); |
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} |
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$path = $this->imageResizer->resize($card, $maxHeight, $useWebp); |
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} |
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$queryParams = $request->getQueryParams(); |
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$resource = fopen($path, 'rb'); |
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$type = mime_content_type($path); |
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$extension = pathinfo($path, PATHINFO_EXTENSION); |
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$filename = $id . '.' . $extension; |
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$disposition = isset($queryParams['inline']) ? 'inline' : 'attachment'; |
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$response = new Response($resource, 200, [ |
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'content-type' => $type, |
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'content-disposition' => $disposition . '; filename=' . $filename, |
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'cache-control' => 'max-age=' . (24 * 60 * 60), // 24 hours cache |
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]); |
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return $response; |
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} |
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/** |
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* Construct a new URI for the current request with the resize query |
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* parameter set to true. |
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*/ |
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protected function constructRedirectURI(): string |
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{ |
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$currentUrl = $_SERVER['REQUEST_URI']; |
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$queryString = $_SERVER['QUERY_STRING']; |
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// Build the new query string |
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parse_str($queryString, $queryArray); |
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$queryArray['resize'] = 'true'; |
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$newQueryString = http_build_query($queryArray); |
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// Reconstruct the URL with the new query string |
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$baseUrl = strtok($currentUrl, '?'); |
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return $baseUrl . '?' . $newQueryString; |
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} |
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} |
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unil-lettres /
dilps-tiresias
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