PHP Fileproxy method

fileproxy.php

<?php

/**
 * @param string $file_name
 * @param string $mime
 * @param string/bool $download
 * @return void
 */
public function fileProxyAction($file_name, $mime, $download = false) {

	if(basename($file_name) != $file_name) return 'Filename not valid!';

	$path = 'fileadmin/ftp.docs/';
	$file = $path.$file_name;
	if (!(file_exists($file) && is_readable($file))) return 'The file "'.$file_name.'" could not be found!';


	// echo $file.'<br>';
	// echo $mime.'<br>';
	// die;

	ob_clean();

	if($download === false) {
		
		header('Content-type: '.$mime);
		header('Content-length: '.filesize($file));

		$open = @ fopen($file, 'rb');
		if ($open) {
			fpassthru($open);
			exit;
		}
		
	} else {
		
		// download
		$path_parts = pathinfo($file);
		header("Content-Disposition: attachment; filename=\"".$path_parts["basename"]."\"");
		header("Content-type: application/octet-stream");
		header("Content-length: " . filesize($file));
		header("Content-Disposition: filename=\"".$path_parts["basename"]."\"");
		header("Cache-control: private"); // open files directly
		readfile($file);
		die;
	}

}