www.gusucode.com > CKFinder 文件管理器PHP版 v3.0源码程序 > code/core/connector/php/vendor/symfony/http-foundation/Symfony/Component/HttpFoundation/BinaryFileResponse.php
<?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\File;
use Symfony\Component\HttpFoundation\File\Exception\FileException;
/**
* 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;
protected $file;
protected $offset;
protected $maxlen;
/**
* Constructor.
*
* @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 null|string $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, $status = 200, $headers = array(), $public = true, $contentDisposition = null, $autoEtag = false, $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 null|string $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 $autoLastModified Whether the Last-Modified header should be automatically set
*
* @return BinaryFileResponse The created response
*/
public static function create($file = null, $status = 200, $headers = array(), $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 $autoLastModified
*
* @return BinaryFileResponse
*
* @throws FileException
*/
public function setFile($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()
{
$this->setEtag(sha1_file($this->file->getPathname()));
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 filename instead of the real name of the file
* @param string $filenameFallback A fallback filename, containing only ASCII characters. Defaults to an automatically encoded filename
*
* @return BinaryFileResponse
*/
public function setContentDisposition($disposition, $filename = '', $filenameFallback = '')
{
if ($filename === '') {
$filename = $this->file->getFilename();
}
$dispositionHeader = $this->headers->makeDisposition($disposition, $filename, $filenameFallback);
$this->headers->set('Content-Disposition', $dispositionHeader);
return $this;
}
/**
* {@inheritdoc}
*/
public function prepare(Request $request)
{
$this->headers->set('Content-Length', $this->file->getSize());
if (!$this->headers->has('Accept-Ranges')) {
// Only accept ranges on safe HTTP methods
$this->headers->set('Accept-Ranges', $request->isMethodSafe() ? 'bytes' : 'none');
}
if (!$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;
$this->maxlen = -1;
if (self::$trustXSendfileTypeHeader && $request->headers->has('X-Sendfile-Type')) {
// Use X-Sendfile, do not send any content.
$type = $request->headers->get('X-Sendfile-Type');
$path = $this->file->getRealPath();
if (strtolower($type) == 'x-accel-redirect') {
// Do X-Accel-Mapping substitutions.
foreach (explode(',', $request->headers->get('X-Accel-Mapping', '')) as $mapping) {
$mapping = explode('=', $mapping, 2);
if (2 == count($mapping)) {
$location = trim($mapping[0]);
$pathPrefix = trim($mapping[1]);
if (substr($path, 0, strlen($pathPrefix)) == $pathPrefix) {
$path = $location.substr($path, strlen($pathPrefix));
break;
}
}
}
}
$this->headers->set($type, $path);
$this->maxlen = 0;
} elseif ($request->headers->has('Range')) {
// Process the range headers.
if (!$request->headers->has('If-Range') || $this->getEtag() == $request->headers->get('If-Range')) {
$range = $request->headers->get('Range');
$fileSize = $this->file->getSize();
list($start, $end) = explode('-', substr($range, 6), 2) + array(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) {
$this->setStatusCode(416);
} elseif ($start !== 0 || $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 $this;
}
/**
* Sends the file.
*/
public function sendContent()
{
if (!$this->isSuccessful()) {
parent::sendContent();
return;
}
if (0 === $this->maxlen) {
return;
}
$out = fopen('php://output', 'wb');
$file = fopen($this->file->getPathname(), 'rb');
stream_copy_to_stream($file, $out, $this->maxlen, $this->offset);
fclose($out);
fclose($file);
}
/**
* {@inheritdoc}
*
* @throws \LogicException when the content is not null
*/
public function setContent($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;
}
}