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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | /** @license For full copyright and license information, please see the LICENSE.md file. */ |
| 6 | |
| 7 | namespace App\Modules\Documents\Presentation\Web; |
| 8 | |
| 9 | defined('AMMONLY_APP') || exit('Direct script access is forbidden.'); |
| 10 | |
| 11 | use App\Core\Engine\Application\Service\UniversalCrudServiceInterface; |
| 12 | use App\Core\Engine\Domain\Exception\PermissionDeniedException; |
| 13 | use App\Core\Engine\Domain\Exception\RecordNotFoundException; |
| 14 | use App\Core\Engine\Domain\Model\PermissionContext; |
| 15 | use App\Core\Security\Path\SafeStoragePathResolver; |
| 16 | use App\Modules\Documents\Application\Service\DocumentUploadService; |
| 17 | use App\Modules\Documents\Domain\Model\DocumentFile; |
| 18 | use Nyholm\Psr7\Response; |
| 19 | use Nyholm\Psr7\Stream; |
| 20 | use Psr\Http\Message\ResponseInterface; |
| 21 | use Throwable; |
| 22 | |
| 23 | /** |
| 24 | * Web controller handling authorized document file download and streaming. |
| 25 | * |
| 26 | * @package App\Modules\Documents\Presentation\Web |
| 27 | */ |
| 28 | final readonly class DocumentDownloadWebController |
| 29 | { |
| 30 | private const string CONTENT_TYPE_PLAIN = 'text/plain'; |
| 31 | |
| 32 | /** |
| 33 | * DocumentDownloadWebController constructor. |
| 34 | * |
| 35 | * @param DocumentUploadService $uploadService Document file upload service. |
| 36 | * @param UniversalCrudServiceInterface|null $crudService Optional CRUD engine service for authorization. |
| 37 | */ |
| 38 | public function __construct( |
| 39 | private DocumentUploadService $uploadService, |
| 40 | private ?UniversalCrudServiceInterface $crudService = null, |
| 41 | ) { |
| 42 | } |
| 43 | |
| 44 | /** |
| 45 | * Downloads an attached document file by document ID and file ID with permission enforcement. |
| 46 | * |
| 47 | * @param int $documentId Document identifier. |
| 48 | * @param int $fileId Attached file identifier. |
| 49 | * @param PermissionContext|null $context Actor permission context. |
| 50 | * @return ResponseInterface File download response or error response. |
| 51 | */ |
| 52 | public function actionDownload( |
| 53 | int $documentId, |
| 54 | int $fileId, |
| 55 | ?PermissionContext $context = null |
| 56 | ): ResponseInterface { |
| 57 | $accessError = $this->checkDocumentAccess($documentId, $context); |
| 58 | if ($accessError !== null) { |
| 59 | return $accessError; |
| 60 | } |
| 61 | |
| 62 | $file = $this->uploadService->getFile($documentId, $fileId); |
| 63 | $absPath = $file !== null ? $this->resolveFileAbsolutePath($file->filePath) : null; |
| 64 | if ($file === null || $absPath === null) { |
| 65 | return $this->textResponse(404, 'File not found or missing on storage server.'); |
| 66 | } |
| 67 | |
| 68 | return $this->streamFileResponse($file, $absPath); |
| 69 | } |
| 70 | |
| 71 | private function checkDocumentAccess(int $documentId, ?PermissionContext $context): ?ResponseInterface |
| 72 | { |
| 73 | if ($context !== null && !$context->isAuthenticated()) { |
| 74 | return $this->textResponse(401, 'Unauthorized: Authentication required.'); |
| 75 | } |
| 76 | |
| 77 | if ($this->crudService !== null && $context !== null) { |
| 78 | try { |
| 79 | $this->crudService->read('documents', $documentId, $context); |
| 80 | } catch (Throwable $e) { |
| 81 | $status = $e instanceof PermissionDeniedException ? 403 : 404; |
| 82 | $msg = $status === 403 ? 'Forbidden: Insufficient permissions.' : 'Document not found.'; |
| 83 | return $this->textResponse($status, $msg); |
| 84 | } |
| 85 | } |
| 86 | |
| 87 | return null; |
| 88 | } |
| 89 | |
| 90 | private function resolveFileAbsolutePath(string $relativePath): ?string |
| 91 | { |
| 92 | return SafeStoragePathResolver::resolve($this->uploadService->resolveStorageBase(), $relativePath); |
| 93 | } |
| 94 | |
| 95 | private function streamFileResponse(DocumentFile $file, string $absPath): ResponseInterface |
| 96 | { |
| 97 | $handle = fopen($absPath, 'rb'); |
| 98 | if ($handle === false) { |
| 99 | return $this->textResponse(500, 'Unable to open file resource.'); |
| 100 | } |
| 101 | |
| 102 | $stream = Stream::create($handle); |
| 103 | $contentDisposition = $this->buildContentDisposition($file->fileName); |
| 104 | |
| 105 | return new Response(200, [ |
| 106 | 'Content-Type' => $file->mimeType ?: 'application/octet-stream', |
| 107 | 'Content-Disposition' => $contentDisposition, |
| 108 | 'Content-Length' => (string) filesize($absPath), |
| 109 | 'Cache-Control' => 'private, no-cache, no-store, must-revalidate', |
| 110 | 'Pragma' => 'no-cache', |
| 111 | 'Expires' => '0', |
| 112 | 'X-Content-Type-Options' => 'nosniff', |
| 113 | ], $stream); |
| 114 | } |
| 115 | |
| 116 | /** |
| 117 | * Builds RFC 5987 / RFC 6266 compliant Content-Disposition header resilient to CRLF injection. |
| 118 | */ |
| 119 | private function buildContentDisposition(string $fileName): string |
| 120 | { |
| 121 | $stripped = str_replace(["\r", "\n", "\0", '"'], '', $fileName); |
| 122 | $ascii = preg_replace('/[^a-zA-Z0-9_\.\-]/', '_', $stripped); |
| 123 | $fallback = ($ascii !== null && $ascii !== '') ? $ascii : 'download.bin'; |
| 124 | $encoded = rawurlencode($stripped !== '' ? $stripped : 'download.bin'); |
| 125 | |
| 126 | return sprintf('attachment; filename="%s"; filename*=UTF-8\'\'%s', $fallback, $encoded); |
| 127 | } |
| 128 | |
| 129 | private function textResponse(int $status, string $message): ResponseInterface |
| 130 | { |
| 131 | return new Response($status, ['Content-Type' => self::CONTENT_TYPE_PLAIN], $message); |
| 132 | } |
| 133 | } |