def do_sess_get(self, url):
        """get url by requests synchronized

        :param url:
        :type url:
        :return:
        :rtype:
        """
        try:
            res = self.sess.get(url, headers=self.headers['get'], timeout=self.timeout)
            if res.status_code == 200:
                return res.content
        except (requests.ReadTimeout, requests.ConnectTimeout, requests.ConnectionError) as _:
            zlog.error('failed of: {} with error: {}'.format(url, _))
get url by requests synchronized

        :param url:
        :type url:
        :return:
        :rtype: