[Cherokee] Transfer file via php not including content-length when gzip compression active

[David Becerril]

Hi,
I have been experiencing problems with gzip compression and php, and I kind
of isolate the problem by transfering a file via php.

I set up the headers and send a file like this (implementing private file
system):

  $headers = array(
    'Pragma: public',
    'Expires: 0',
    'Cache-Control: must-revalidate, post-check=0, pre-check=0, private',
    'Content-Type: '. mime_header_encode($filemime),
    'Content-Length: '. $filesize,
    'Content-Disposition: inline;',
    'Content-Transfer-Encoding: binary',
  );

 foreach ($headers as $header) {
    // To prevent HTTP header injection, we delete new lines that are
    // not followed by a space or a tab.
    // See http://www.w3.org/Protocols/rfc2616/rfc2616-sec4.html#sec4.2
    $header = preg_replace('/\r?\n(?!\t| )/', '', $header);
    header($header);
  }


  // $source is the path to the file
  // Transfer file in 1024 byte chunks to save memory usage.
  if ($fd = fopen($source, 'rb')) {
    if (!ini_get('safe_mode')) {
      set_time_limit(0);
    }
    while (!feof($fd)) {
      print fread($fd, 1024);
    }
    fclose($fd);
  }

  exit();

Without gzip compression in encoding in the php behavior I get the correct
headers, for example:


   1. Cache-Control:
   post-check=0, pre-check=0, must-revalidate, post-check=0, pre-check=0,
   private
   2. Connection:
   Keep-Alive
   3. Content-Disposition:
   inline;
   4. Content-Length:
   6514014
   5. Content-Transfer-Encoding:
   binary
   6. Content-Type:
   application/octet-stream
   7. Date:
   Mon, 19 Oct 2009 18:31:55 GMT
   8. Expires:
   0
   9. Keep-Alive:
   timeout=1000
   10. Last-Modified:
   Mon, 19 Oct 2009 18:31:55 GMT
   11. Pragma:
   public
   12. Server:
   Cherokee/0.99.24 (Ubuntu)
   13. X-Powered-By:
   PHP/5.2.6-3ubuntu4.2


Adding gzip compression in encoding in the php behavior I do not get the
content-length when sending the file:


   1. Cache-Control:
   post-check=0, pre-check=0, must-revalidate, post-check=0, pre-check=0,
   private
   2. Connection:
   Keep-Alive
   3. Content-Disposition:
   inline;
   4. Content-Encoding:
   gzip
   5. Content-Transfer-Encoding:
   binary
   6. Content-Type:
   application/octet-stream
   7. Date:
   Mon, 19 Oct 2009 18:35:36 GMT
   8. Expires:
   0
   9. Keep-Alive:
   timeout=1000
   10. Last-Modified:
   Mon, 19 Oct 2009 18:35:36 GMT
   11. Pragma:
   public
   12. Server:
   Cherokee/0.99.24 (Ubuntu)
   13. Transfer-Encoding:
   Identity
   14. Vary:
   Accept-Encoding
   15. X-Powered-By:
   PHP/5.2.6-3ubuntu4.2


I do not know what is the real problem, and do not know how to "debug", if
this is cherokee issue, php, etc...

Thanks for the help!

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