Zend Framework 2: how to programmatically serve a file?

Question

Zend Framework

I am using Zend Framework 2.4. I'm trying to give the file in action. I do it like this:

public function downloadAction()
{
    // $file = ...;

    $response = new \Zend\Http\Response\Stream();
    $response->setStream(fopen($file, 'r'));
    $response->setStatusCode(200);
    $response->setStreamName(basename($file));
    $response->setContentLength(filesize($file));

    $headers = new \Zend\Http\Headers();
    $headers->addHeaderLine('Content-Type', 'application/octet-stream')
            ->addHeaderLine('Content-Disposition', 'attachment; filename="'.basename($file).'"')
            ->addHeaderLine('Content-Transfer-Encoding', 'binary')
            ->addHeaderLine('Content-Length', filesize($file))
            ->addHeaderLine('Cache-Control', 'must-revalidate')
            ->addHeaderLine('Pragma', 'public');

    $response->setHeaders($headers);

    return $response;
}

The file exists and is readable. But it loads broken (does not open). The size matches. What could be the problem here?

Answer 1

In general, the problem turned out to be that a space (character 0x20) is added to the response body - to the beginning. As a result, the entire contents of the file was shifted by one byte: a space byte was added to the beginning, and the last byte was not read at all, since it went beyond the limits specified in Content-Length.
Decided by calling ob_clean();before sending a response.
I have not yet understood where this unfortunate gap comes from (perhaps someone will have suggestions?). First I sinned on the closing tag ?>at the end of some file, grep went through it, but did not find anything like that.

Answer 2

I would give nginx tools: wiki.nginx.org/X-accel