/**
* Redirect (mean read from file and output) to CSS-file of current map.
* Almost generate header-values.
*
* @param array $map_cfg map-config array
*
* @return bool is redirect done
*/
public static function redirect($map_cfg)
{
$filename = self::get_valid_css_source($map_cfg, isset($map_cfg['attach']));
if ($filename === false) {
return false;
}
//---------------------------------------------------------------------
$cache_timeout = qpimg_config::get_option('cache_time_expire');
$headers = array();
$headers['Expires'] = gmdate('D, d M Y H:i:s \\G\\M\\T', time() + $cache_timeout);
$headers['Last-Modified'] = gmdate('D, d M Y H:i:s \\G\\M\\T', filemtime($filename));
$headers['ETag'] = "\"qpimg-{$map_cfg['id']}-{$map_cfg['hash']}\"";
//---------------------------------------------------------------------
$if_none_match = isset($_SERVER['HTTP_IF_NONE_MATCH']) ? stripslashes($_SERVER['HTTP_IF_NONE_MATCH']) : false;
$if_modified_since = isset($_SERVER['HTTP_IF_MODIFIED_SINCE']) ? stripslashes($_SERVER['HTTP_IF_MODIFIED_SINCE']) : false;
if ($if_none_match && $if_none_match == $headers['ETag']) {
$headers[':Response-Code'] = 304;
$filename = false;
} elseif ($if_modified_since && $if_modified_since == $headers['Last-Modified']) {
$headers[':Response-Code'] = 304;
$filename = false;
} else {
$headers['Content-Type'] = 'text/css';
$headers['Cache-Control'] = "max-age={$cache_timeout}, public, must-revalidate";
}
qpimg_utils::send_headers($headers);
if ($filename !== false) {
@readfile($filename);
}
return true;
}
