public function bellowSizeLimit($file)
    {
        $content = @file_get_contents($file['tmp_name']);
        $filesize = strlen($content);
        $uploadlimit = $this->_max_upload_limit * 1024 * 1024;

        if ($filesize > $uploadlimit) {
            throw new LibBaseControllerExceptionBadRequest('Exceed maximum size');
        }

        return true;
    }