header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
header('Content-Type: ' . $mimeType);
header('Content-Disposition: attachment; filename="' . basename($absoluteFileName) . '"');
+ header('Content-Length: ' . filesize($absoluteFileName));
+ \TYPO3\CMS\Core\Utility\GeneralUtility::flushOutputBuffers();
readfile($absoluteFileName);
die;
} else {