vendor/symfony/http-foundation/BinaryFileResponse.php line 48
<?php/** This file is part of the Symfony package.** (c) Fabien Potencier <fabien@symfony.com>** For the full copyright and license information, please view the LICENSE* file that was distributed with this source code.*/namespace Symfony\Component\HttpFoundation;use Symfony\Component\HttpFoundation\File\Exception\FileException;use Symfony\Component\HttpFoundation\File\File;/*** BinaryFileResponse represents an HTTP response delivering a file.** @author Niklas Fiekas <niklas.fiekas@tu-clausthal.de>* @author stealth35 <stealth35-php@live.fr>* @author Igor Wiedler <igor@wiedler.ch>* @author Jordan Alliot <jordan.alliot@gmail.com>* @author Sergey Linnik <linniksa@gmail.com>*/class BinaryFileResponse extends Response{protected static $trustXSendfileTypeHeader = false;/*** @var File*/protected $file;protected $offset = 0;protected $maxlen = -1;protected $deleteFileAfterSend = false;protected $chunkSize = 16 * 1024;/*** @param \SplFileInfo|string $file The file to stream* @param int $status The response status code (200 "OK" by default)* @param array $headers An array of response headers* @param bool $public Files are public by default* @param string|null $contentDisposition The type of Content-Disposition to set automatically with the filename* @param bool $autoEtag Whether the ETag header should be automatically set* @param bool $autoLastModified Whether the Last-Modified header should be automatically set*/public function __construct(\SplFileInfo|string $file, int $status = 200, array $headers = [], bool $public = true, string $contentDisposition = null, bool $autoEtag = false, bool $autoLastModified = true){parent::__construct(null, $status, $headers);$this->setFile($file, $contentDisposition, $autoEtag, $autoLastModified);if ($public) {$this->setPublic();}}/*** Sets the file to stream.** @return $this** @throws FileException*/public function setFile(\SplFileInfo|string $file, string $contentDisposition = null, bool $autoEtag = false, bool $autoLastModified = true): static{if (!$file instanceof File) {if ($file instanceof \SplFileInfo) {$file = new File($file->getPathname());} else {$file = new File((string) $file);}}if (!$file->isReadable()) {throw new FileException('File must be readable.');}$this->file = $file;if ($autoEtag) {$this->setAutoEtag();}if ($autoLastModified) {$this->setAutoLastModified();}if ($contentDisposition) {$this->setContentDisposition($contentDisposition);}return $this;}/*** Gets the file.*/public function getFile(): File{return $this->file;}/*** Sets the response stream chunk size.** @return $this*/public function setChunkSize(int $chunkSize): static{if ($chunkSize < 1 || $chunkSize > \PHP_INT_MAX) {throw new \LogicException('The chunk size of a BinaryFileResponse cannot be less than 1 or greater than PHP_INT_MAX.');}$this->chunkSize = $chunkSize;return $this;}/*** Automatically sets the Last-Modified header according the file modification date.** @return $this*/public function setAutoLastModified(): static{$this->setLastModified(\DateTime::createFromFormat('U', $this->file->getMTime()));return $this;}/*** Automatically sets the ETag header according to the checksum of the file.** @return $this*/public function setAutoEtag(): static{$this->setEtag(base64_encode(hash_file('sha256', $this->file->getPathname(), true)));return $this;}/*** Sets the Content-Disposition header with the given filename.** @param string $disposition ResponseHeaderBag::DISPOSITION_INLINE or ResponseHeaderBag::DISPOSITION_ATTACHMENT* @param string $filename Optionally use this UTF-8 encoded filename instead of the real name of the file* @param string $filenameFallback A fallback filename, containing only ASCII characters. Defaults to an automatically encoded filename** @return $this*/public function setContentDisposition(string $disposition, string $filename = '', string $filenameFallback = ''): static{if ('' === $filename) {$filename = $this->file->getFilename();}if ('' === $filenameFallback && (!preg_match('/^[\x20-\x7e]*$/', $filename) || str_contains($filename, '%'))) {$encoding = mb_detect_encoding($filename, null, true) ?: '8bit';for ($i = 0, $filenameLength = mb_strlen($filename, $encoding); $i < $filenameLength; ++$i) {$char = mb_substr($filename, $i, 1, $encoding);if ('%' === $char || \ord($char) < 32 || \ord($char) > 126) {$filenameFallback .= '_';} else {$filenameFallback .= $char;}}}$dispositionHeader = $this->headers->makeDisposition($disposition, $filename, $filenameFallback);$this->headers->set('Content-Disposition', $dispositionHeader);return $this;}public function prepare(Request $request): static{if ($this->isInformational() || $this->isEmpty()) {parent::prepare($request);$this->maxlen = 0;return $this;}if (!$this->headers->has('Content-Type')) {$this->headers->set('Content-Type', $this->file->getMimeType() ?: 'application/octet-stream');}parent::prepare($request);$this->offset = 0;$this->maxlen = -1;if (false === $fileSize = $this->file->getSize()) {return $this;}$this->headers->remove('Transfer-Encoding');$this->headers->set('Content-Length', $fileSize);if (!$this->headers->has('Accept-Ranges')) {// Only accept ranges on safe HTTP methods$this->headers->set('Accept-Ranges', $request->isMethodSafe() ? 'bytes' : 'none');}if (self::$trustXSendfileTypeHeader && $request->headers->has('X-Sendfile-Type')) {// Use X-Sendfile, do not send any content.$type = $request->headers->get('X-Sendfile-Type');$path = $this->file->getRealPath();// Fall back to scheme://path for stream wrapped locations.if (false === $path) {$path = $this->file->getPathname();}if ('x-accel-redirect' === strtolower($type)) {// Do X-Accel-Mapping substitutions.// @link https://www.nginx.com/resources/wiki/start/topics/examples/x-accel/#x-accel-redirect$parts = HeaderUtils::split($request->headers->get('X-Accel-Mapping', ''), ',=');foreach ($parts as $part) {[$pathPrefix, $location] = $part;if (str_starts_with($path, $pathPrefix)) {$path = $location.substr($path, \strlen($pathPrefix));// Only set X-Accel-Redirect header if a valid URI can be produced// as nginx does not serve arbitrary file paths.$this->headers->set($type, $path);$this->maxlen = 0;break;}}} else {$this->headers->set($type, $path);$this->maxlen = 0;}} elseif ($request->headers->has('Range') && $request->isMethod('GET')) {// Process the range headers.if (!$request->headers->has('If-Range') || $this->hasValidIfRangeHeader($request->headers->get('If-Range'))) {$range = $request->headers->get('Range');if (str_starts_with($range, 'bytes=')) {[$start, $end] = explode('-', substr($range, 6), 2) + [1 => 0];$end = ('' === $end) ? $fileSize - 1 : (int) $end;if ('' === $start) {$start = $fileSize - $end;$end = $fileSize - 1;} else {$start = (int) $start;}if ($start <= $end) {$end = min($end, $fileSize - 1);if ($start < 0 || $start > $end) {$this->setStatusCode(416);$this->headers->set('Content-Range', sprintf('bytes */%s', $fileSize));} elseif ($end - $start < $fileSize - 1) {$this->maxlen = $end < $fileSize ? $end - $start + 1 : -1;$this->offset = $start;$this->setStatusCode(206);$this->headers->set('Content-Range', sprintf('bytes %s-%s/%s', $start, $end, $fileSize));$this->headers->set('Content-Length', $end - $start + 1);}}}}}if ($request->isMethod('HEAD')) {$this->maxlen = 0;}return $this;}private function hasValidIfRangeHeader(?string $header): bool{if ($this->getEtag() === $header) {return true;}if (null === $lastModified = $this->getLastModified()) {return false;}return $lastModified->format('D, d M Y H:i:s').' GMT' === $header;}public function sendContent(): static{try {if (!$this->isSuccessful()) {return parent::sendContent();}if (0 === $this->maxlen) {return $this;}$out = fopen('php://output', 'w');$file = fopen($this->file->getPathname(), 'r');ignore_user_abort(true);if (0 !== $this->offset) {fseek($file, $this->offset);}$length = $this->maxlen;while ($length && !feof($file)) {$read = $length > $this->chunkSize || 0 > $length ? $this->chunkSize : $length;if (false === $data = fread($file, $read)) {break;}while ('' !== $data) {$read = fwrite($out, $data);if (false === $read || connection_aborted()) {break 2;}if (0 < $length) {$length -= $read;}$data = substr($data, $read);}}fclose($out);fclose($file);} finally {if ($this->deleteFileAfterSend && is_file($this->file->getPathname())) {unlink($this->file->getPathname());}}return $this;}/*** @throws \LogicException when the content is not null*/public function setContent(?string $content): static{if (null !== $content) {throw new \LogicException('The content cannot be set on a BinaryFileResponse instance.');}return $this;}public function getContent(): string|false{return false;}/*** Trust X-Sendfile-Type header.*/public static function trustXSendfileTypeHeader(){self::$trustXSendfileTypeHeader = true;}/*** If this is set to true, the file will be unlinked after the request is sent* Note: If the X-Sendfile header is used, the deleteFileAfterSend setting will not be used.** @return $this*/public function deleteFileAfterSend(bool $shouldDelete = true): static{$this->deleteFileAfterSend = $shouldDelete;return $this;}}