public function loadResource ( $key )
    {
        $key_bits = explode ( ".", $key );

        $id = UrlShortener::shortToInt ( $key_bits [ 0 ] );
        $type = $key_bits [ 1 ];

        $query = mysql_query ( "SELECT name, built FROM resources_v2 WHERE id = '$id' AND type = '$type' LIMIT 1" );

        if ( mysql_num_rows ( $query ) > 0 )
        {
            $row = mysql_fetch_assoc ( $query );

            if ( is_array ( $this -> packages [ $type ] [ $row [ 'name' ] ] ) )
            {
                header("Cache-Control: max-age=1209600, must-revalidate");
                //header("Last-Modified: " . gmdate('D, d M Y H:i:s', strtotime ( $row [ 'built' ] ) ) . ' GMT' );
                //header("HTTP/1.1 304 Not Modified");

                $path = $this -> getPath ( $type );

                $content = '';

                foreach ( $this -> packages [ $type ] [ $row [ 'name' ] ] [ 'files' ] as $file )
                {
                    $content .= file_get_contents ( $path . $file ) . "\n";
                }

                switch ( $type )
                {
                    case "js":
                        header ( "content-type: application/javascript" );
                        echo $this -> minifyJS ( $content );
                        break;
                    case "css":
                        header ( "content-type: text/css" );
                        echo $this -> minifyCSS ( $content );
                        break;
                }

                return;
            }
        }

        header ( 'HTTP/1.0 404 Not Found' );
        die ( "404, Not found" );
    }