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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;
/**
* @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 $autoLastModified Whether the Last-Modified header should be automatically set
*/
public function __construct($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();
}
}
/**
* @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 $autoLastModified Whether the Last-Modified header should be automatically set
*
* @return static
*/
public static function create($file = null, $status = 200, $headers = [], $public = true, $contentDisposition = null, $autoEtag = false, $autoLastModified = true)
{
return new static($file, $status, $headers, $public, $contentDisposition, $autoEtag, $autoLastModified);
}
/**
* Sets the file to stream.
*
* @param \SplFileInfo|string $file The file to stream
* @param string $contentDisposition
* @param bool $autoEtag
* @param bool $autoLastModified
*
* @return $this
*
* @throws FileException
*/
public function setFile($file, $contentDisposition = null, $autoEtag = false, $autoLastModified = true)
{
if (!$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.
*
* @return File The file to stream
*/
public function getFile()
{
return $this->file;
}
/**
* Automatically sets the Last-Modified header according the file modification date.
*/
public function setAutoLastModified()
{
$this->setLastModified(\DateTime::createFromFormat('U', $this->file->getMTime()));
return $this;
}
/**
* Automatically sets the ETag header according to the checksum of the file.
*/
public function setAutoEtag()
{
$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 $this
*/
public function setContentDisposition($disposition, $filename = '', $filenameFallback = '')
{
if ('' === $filename) {
$filename = $this->file->getFilename();
}
if ('' === $filenameFallback && (!preg_match('/^[\x20-\x7e]*$/', $filename) || false !== strpos($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 $request)
{
if (!$this->headers->has('Content-Type')) {
$this->headers->set('Content-Type', $this->file->getMimeType() ?: 'application/octet-stream');
}
if ('HTTP/1.0' !== $request->server->get('SERVER_PROTOCOL')) {
$this->setProtocolVersion('1.1');
}
$this->ensureIEOverSSLCompatibility($request);
$this->offset = 0;
$this->maxlen = -1;
if (false === $fileSize = $this->file->getSize()) {
return $this;
}
$this->headers->set('Content-Length', $fileSize);
if (!$this->headers->has('Accept-Ranges')) {
// Only accept ranges on safe HTTP methods
$this->headers->set('Accept-Ranges', $request->isMethodSafe(false) ? 'bytes' : 'none');
}
if (self::$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 http://wiki.nginx.org/X-accel#X-Accel-Redirect
$parts = HeaderUtils::split($request->headers->get('X-Accel-Mapping', ''), ',=');
foreach ($parts as $part) {
list($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')) {
// Process the range headers.
if (!$request->headers->has('If-Range') || $this->hasValidIfRangeHeader($request->headers->get('If-Range'))) {
$range = $request->headers->get('Range');
list($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 <= $end) {
if ($start < 0 || $end > $fileSize - 1) {
$this->setStatusCode(416);
$this->headers->set('Content-Range', sprintf('bytes */%s', $fileSize));
} elseif (0 !== $start || $end !== $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);
}
}
}
}
return $this;
}
private function hasValidIfRangeHeader($header)
{
if ($this->getEtag() === $header) {
return true;
}
if (null === $lastModified = $this->getLastModified()) {
return false;
}
return $lastModified->format('D, d M Y H:i:s').' GMT' === $header;
}
/**
* Sends the file.
*
* {@inheritdoc}
*/
public function sendContent()
{
if (!$this->isSuccessful()) {
return parent::sendContent();
}
if (0 === $this->maxlen) {
return $this;
}
$out = fopen('php://output', 'wb');
$file = fopen($this->file->getPathname(), 'rb');
stream_copy_to_stream($file, $out, $this->maxlen, $this->offset);
fclose($out);
fclose($file);
if ($this->deleteFileAfterSend && file_exists($this->file->getPathname())) {
unlink($this->file->getPathname());
}
return $this;
}
/**
* {@inheritdoc}
*
* @throws \LogicException when the content is not null
*/
public function setContent($content)
{
if (null !== $content) {
throw new \LogicException('The content cannot be set on a BinaryFileResponse instance.');
}
}
/**
* {@inheritdoc}
*
* @return false
*/
public function getContent()
{
return false;
}
/**
* Trust X-Sendfile-Type header.
*/
public static function trustXSendfileTypeHeader()
{
self::$trustXSendfileTypeHeader = true;
}
/**
* If this is set to true, the file will be unlinked after the request is send
* Note: If the X-Sendfile header is used, the deleteFileAfterSend setting will not be used.
*
* @param bool $shouldDelete
*
* @return $this
*/
public function deleteFileAfterSend($shouldDelete = true)
{
$this->deleteFileAfterSend = $shouldDelete;
return $this;
}
}