public function url_stat($path, $flag)
    {
        $path = str_replace(array($this->_protocol.'://', '/'), array('', DIRECTORY_SEPARATOR), $path);

        $this->_path = $this->resolveFilePath($path);
        if (is_file($this->_path) && is_readable($this->_path)) {
            $fd = fopen($this->_path, 'rb');
            $this->_stat = fstat($fd);
            fclose($fd);

            return $this->_stat;
        }

        return;
    }