Get http content
        :param url: contents url
        :param headers: http header
        :return: BeautifulSoup object

def _get_content(cls, url, headers=HTTP_HEADERS):
        """
        Get http content
        :param url: contents url
        :param headers: http header
        :return: BeautifulSoup object
        """
        session = requests.Session()
        return session.get(url, headers=headers)