68 lines
2.1 KiB
Python
68 lines
2.1 KiB
Python
#
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# Copyright (C) 2012, Red Hat, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Middleware for authenticating against custom backends."""
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from oslo_context import context
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from oslo_log import log as logging
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import webob.exc
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from heat.common.i18n import _
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from heat.rpc import client as rpc_client
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LOG = logging.getLogger(__name__)
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class AuthProtocol(object):
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def __init__(self, app, conf):
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self.conf = conf
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self.app = app
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self.rpc_client = rpc_client.EngineClient()
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def __call__(self, env, start_response):
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"""Handle incoming request.
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Authenticate send downstream on success. Reject request if
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we can't authenticate.
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"""
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LOG.debug('Authenticating user token')
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ctx = context.get_current()
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authenticated = self.rpc_client.authenticated_to_backend(ctx)
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if authenticated:
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return self.app(env, start_response)
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else:
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return self._reject_request(env, start_response)
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def _reject_request(self, env, start_response):
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"""Redirect client to auth server.
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:param env: wsgi request environment
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:param start_response: wsgi response callback
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:returns: HTTPUnauthorized http response
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"""
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resp = webob.exc.HTTPUnauthorized(_("Backend authentication failed"),
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[])
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return resp(env, start_response)
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def filter_factory(global_conf, **local_conf):
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conf = global_conf.copy()
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conf.update(local_conf)
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def auth_filter(app):
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return AuthProtocol(app, conf)
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return auth_filter
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