I am trying to do force download using ZF2. Here is the snippet to my code 

 use Zend\Http\Request;
 .....
   public function downloadAction() {
     $response = new Request();
    $response->setHeaders(Request::fromString("Content-Type: application/octet-stream\r\nContent-Length: 9\r\nContent-Disposition: attachment; filename=\"ultimate_remedy_readme.txt\""));


}

now i am getting this error 

/var/www/whowantsmymoney/vendor/zendframework/zendframework/library/Zend/Http/Request.php:88

Message:

A valid request line was not found in the provided string

Stack trace:

#0 /var/www/whowantsmymoney/module/Admin/src/Admin/Controller/LanguageController.php(93): Zend\Http\Request::fromString('Content-Type: a...')
zend-framework2 force-download
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