This code should help you for a simple file download.
public function downloadAction() {
$fileName = 'somefile';
if(!is_file($fileName)) {
//do something
}
$fileContents = file_get_contents($fileName);
$response = $this->getResponse();
$response->setContent($fileContents);
$headers = $response->getHeaders();
$headers->clearHeaders()
->addHeaderLine('Content-Type', 'whatever your content type is')
->addHeaderLine('Content-Disposition', 'attachment; filename="' . $fileName . '"')
->addHeaderLine('Content-Length', strlen($fileContents));
return $this->response;
}
I imagine this code leaves a lot to be desired, but should work in simple cases, as was mine. I'm not sure how you might handle reading the file in chunks. Maybe somebody else could shed some light?
Edit - Sending streams
I've added this here for informational purposes. It is probably the better way to force downloads as it will use much less memory.
public function downloadAction() {
$fileName = 'somefile';
$response = new \Zend\Http\Response\Stream();
$response->setStream(fopen($fileName, 'r'));
$response->setStatusCode(200);
$headers = new \Zend\Http\Headers();
$headers->addHeaderLine('Content-Type', 'whatever your content type is')
->addHeaderLine('Content-Disposition', 'attachment; filename="' . $fileName . '"')
->addHeaderLine('Content-Length', filesize($fileName));
$response->setHeaders($headers);
return $response;