function advagg_file_download

Implements hook_file_download().

Return the correct headers for advagg bundles.

Fichier

./advagg.module, line 3348

Code

function advagg_file_download($file, $type = '') {
    // Do nothing if not an AdvAgg File.
    if (strpos($file, '/advagg_') === FALSE || empty($type)) {
        return;
    }
    // Set the headers.
    $return = array();
    $return[] = 'Content-Length: ' . filesize($file);
    // Set a far future Cache-Control header (480 weeks), which prevents
    // intermediate caches from transforming the data and allows any
    // intermediate cache to cache it, since it's marked as a public resource.
    $return[] = "Cache-Control: max-age=290304000, no-transform, public";
    // Set a far future Expires header. The maximum UNIX timestamp is somewhere
    // in 2038. Set it to a date in 2037, just to be safe.
    $return[] = 'Expires: Tue, 20 Jan 2037 04:20:42 GMT';
    // Pretend the file was last modified a long time ago in the past, this will
    // prevent browsers that don't support Cache-Control nor Expires headers to
    // still request a new version too soon (these browsers calculate a
    // heuristic to determine when to request a new version, based on the last
    // time the resource has been modified).
    // Also see http://code.google.com/speed/page-speed/docs/caching.html.
    $return[] = 'Last-Modified: Wed, 20 Jan 1988 04:20:42 GMT';
    if ($type == 'css') {
        $return[] = 'Content-Type: text/css';
    }
    if ($type == 'js') {
        $return[] = 'Content-Type: text/javascript';
    }
    return $return;
}