3 namespace BookStack\Http;
5 use Illuminate\Http\Request;
6 use Illuminate\Http\Response;
7 use Symfony\Component\HttpFoundation\StreamedResponse;
9 class DownloadResponseFactory
11 public function __construct(
12 protected Request $request,
17 * Create a response that directly forces a download in the browser.
19 public function directly(string $content, string $fileName): Response
21 return response()->make($content, 200, $this->getHeaders($fileName, strlen($content)));
25 * Create a response that forces a download, from a given stream of content.
27 public function streamedDirectly($stream, string $fileName, int $fileSize): StreamedResponse
29 $rangeStream = new RangeSupportedStream($stream, $fileSize, $this->request);
30 $headers = array_merge($this->getHeaders($fileName, $fileSize), $rangeStream->getResponseHeaders());
31 return response()->stream(
32 fn() => $rangeStream->outputAndClose(),
33 $rangeStream->getResponseStatus(),
39 * Create a response that downloads the given file via a stream.
40 * Has the option to delete the provided file once the stream is closed.
42 public function streamedFileDirectly(string $filePath, string $fileName, int $fileSize, bool $deleteAfter = false): StreamedResponse
44 $stream = fopen($filePath, 'r');
47 // Delete the given file if it still exists after the app terminates
48 $callback = function () use ($filePath) {
49 if (file_exists($filePath)) {
54 // We watch both app terminate and php shutdown to cover both normal app termination
55 // as well as other potential scenarios (connection termination).
56 app()->terminating($callback);
57 register_shutdown_function($callback);
60 return $this->streamedDirectly($stream, $fileName, $fileSize);
65 * Create a file download response that provides the file with a content-type
66 * correct for the file, in a way so the browser can show the content in browser,
67 * for a given content stream.
69 public function streamedInline($stream, string $fileName, int $fileSize): StreamedResponse
71 $rangeStream = new RangeSupportedStream($stream, $fileSize, $this->request);
72 $mime = $rangeStream->sniffMime();
73 $headers = array_merge($this->getHeaders($fileName, $fileSize, $mime), $rangeStream->getResponseHeaders());
75 return response()->stream(
76 fn() => $rangeStream->outputAndClose(),
77 $rangeStream->getResponseStatus(),
83 * Get the common headers to provide for a download response.
85 protected function getHeaders(string $fileName, int $fileSize, string $mime = 'application/octet-stream'): array
87 $disposition = ($mime === 'application/octet-stream') ? 'attachment' : 'inline';
88 $downloadName = str_replace('"', '', $fileName);
91 'Content-Type' => $mime,
92 'Content-Length' => $fileSize,
93 'Content-Disposition' => "{$disposition}; filename=\"{$downloadName}\"",
94 'X-Content-Type-Options' => 'nosniff',