/**
* Outputs file Contents,
* clears output buffer first and sends headers accordingly.
*
* @param FileInterface $file
* @param bool $asDownload If set Content-Disposition attachment is sent, inline otherwise
* @param string $alternativeFilename the filename for the download (if $asDownload is set)
* @return void
*/
public function dumpFileContents(FileInterface $file, $asDownload = FALSE, $alternativeFilename = NULL)
{
$downloadName = $alternativeFilename ?: $file->getName();
$contentDisposition = $asDownload ? 'attachment' : 'inline';
header('Content-Disposition: ' . $contentDisposition . '; filename="' . $downloadName . '"');
header('Content-Type: ' . $file->getMimeType());
header('Content-Length: ' . $file->getSize());
// Cache-Control header is needed here to solve an issue with browser IE8 and lower
// See for more information: http://support.microsoft.com/kb/323308
header("Cache-Control: ''");
header('Last-Modified: ' . gmdate('D, d M Y H:i:s', array_pop($this->driver->getFileInfoByIdentifier($file->getIdentifier(), array('mtime')))) . ' GMT', TRUE, 200);
ob_clean();
flush();
$this->driver->dumpFileContents($file->getIdentifier());
}