http.py 文件源码

def _get_http_auth(response, url, auth_scheme):
    """Get authentication mechanism required by server

    :param response: requests.response
    :type response: requests.Response
    :param url: parsed request url
    :type url: str
    :param auth_scheme: str
    :type auth_scheme: str
    :returns: AuthBase
    :rtype: AuthBase
    """

    hostname = url.hostname
    username = url.username
    password = url.password

    if 'www-authenticate' in response.headers:
        if auth_scheme not in ['basic', 'acsjwt', 'oauthjwt']:
            msg = ("Server responded with an HTTP 'www-authenticate' field of "
                   "'{}', DCOS only supports 'Basic'".format(
                       response.headers['www-authenticate']))
            raise DCOSException(msg)

        if auth_scheme == 'basic':
            # for basic auth if username + password was present,
            # we'd already be authed by python requests module
            username, password = _get_auth_credentials(username, hostname)
            return HTTPBasicAuth(username, password)
        # dcos auth (acs or oauth)
        else:
            return _get_dcos_auth(auth_scheme, username, password, hostname)
    else:
        msg = ("Invalid HTTP response: server returned an HTTP 401 response "
               "with no 'www-authenticate' field")
        raise DCOSException(msg)