function getFile()
{
  if(!isset($_REQUEST['filename'])){
    $this->setMessage('Nieprawidowe wywoanie.');
    return ACTION_FAILED;
  }
  
  $filename = $_REQUEST['filename'];
  
  if(!file_exists($this->filespath.$filename)){
    $this->setMessage('Brak wskazanego pliku.');
    return ACTION_FAILED;
  }
  
  header('Content-Type: application/octet-stream');
  header('Content-Disposition: attachment; filename='.$filename);
  header('Content-Length: ' . filesize($this->filespath.$filename));
  readfile($this->filespath.$filename);
}