[Scummvm-devel] [Scummvm-cvs-logs] SF.net SVN: scummvm:[40038] web/trunk/downloads.php

[J. King]

On Tue, 21 Apr 2009 07:52:36 -0400, Travis Howell <kirben at optusnet.com.au>  
wrote:

> I'm not familiar with php scripting, so I didn't notice until commit. I
> was hoping another method could be used, so people could tell when
> exactly the last snapshots were generated, and the expected download  
> size.

Yeah, the HTTP wrapper doesn't support stat() functionality, so you can't  
get filesize() or filemtime() results (even though such data is usually  
available via a HEAD request in HTTP, at least on static resources.  You  
can, under normal circumstances, get the desired data, but it's rather on  
the convoluted side:

function url_get_meta($url) {
  $stream = fopen($url, "r", 0,
    stream_context_create(array('http' => array('method' => "HEAD"))));
  $header = stream_get_meta_data($stream);
  // We reverse because headers stack after redirections
  $header = array_reverse($header['wrapper_data']);
  fclose($stream);
  for ($a = 0; $a < sizeof($header); $a++) {
   if (preg_match("/^Last-Modified:\s+(.+)$/i", $header[$a], $match)) {
    $time = date("F j, Y, g:i a", strtotime($match[1]));
    break;
   }
  }
  for ($a = 0; $a < sizeof($header); $a++) {
   if (preg_match("/^Content-Length:\s+(\d+)$/i", $header[$a], $match)) {
   $size = ceil($match[1] / 1024);
    break;
   }
  }
  return array('size' => $size, 'time' => $time);
}


The amount of processing involved is a little much for advisory data,  
unfortunately.  There may be a better way, but if there is I've yet to  
find it---which is unfortunate since this sort of thing has been a common  
use case in my experience.



-- 
J. King