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# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import abc
import six
@six.add_metaclass(abc.ABCMeta)
class BaseAuthPlugin(object):
"""The basic structure of an authentication plugin."""
@abc.abstractmethod
def get_token(self, session, **kwargs):
"""Obtain a token.
How the token is obtained is up to the plugin. If it is still valid
it may be re-used, retrieved from cache or invoke an authentication
request against a server.
There are no required kwargs. They are passed directly to the auth
plugin and they are implementation specific.
Returning None will indicate that no token was able to be retrieved.
:param session: A session object so the plugin can make HTTP calls.
:return string: A token to use.
"""