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<?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 = 8 * 1024;
/**
* @param \SplFileInfo|string $file The file to stream
* @param int $status The response status code
* @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;
}
/**
* {@inheritdoc}
*/
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] = $part;
if (substr($path, 0, \strlen($pathPrefix)) === $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) + [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' === $header;
}
/**
* {@inheritdoc}
*/
public function sendContent(): static
{
try {
if (!$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) ? $this->chunkSize : $length;
$length -= $read;
stream_copy_to_stream($file, $out, $read);
if (connection_aborted()) {
break;
}
}
fclose($out);
fclose($file);
} finally {
if ($this->deleteFileAfterSend && is_file($this->file->getPathname())) {
unlink($this->file->getPathname());
}
}
return $this;
}
/**
* {@inheritdoc}
*
* @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 $this;
}
/**
* {@inheritdoc}
*/
public function getContent(): string|false
{
return false;
}
/**
* Trust X-Sendfile-Type header.
*/
public static function trustXSendfileTypeHeader()
{
self::$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;
}
}
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