horizon/openstack_dashboard/policy.py
David Lyle 39bd444a0c Moving policy engine implementation
This is the first step in moving the policy engine to
django_openstack_auth. It makes the policy check method pluggable
in openstack_dashboard as it is in horizon. To do this, the wrapper
around the policy engine is moved to a new file isolated from the
policy check method. A thin check method is left in policy.py to
allow the code and policy mix-ins to behave as now. The existing
policy test file is also moved for relocation. A new test file has
been added to exercise the simpler check method.

Once the actual engine is moved to django_openstack_auth, we'll be
able to remove policy_backend.py and the test version of
policy_backend.py as well.

Partially Implemenents: blueprint move-policy-engine

Change-Id: I591bcbe69bf255f1aa0346fdf869fac86d2e6d3d
2015-01-22 15:55:19 -07:00

53 lines
1.8 KiB
Python

#
# 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.
from django.conf import settings
def check(actions, request, target=None):
"""Wrapper of the configurable policy method."""
policy_check = getattr(settings, "POLICY_CHECK_FUNCTION", None)
if policy_check:
return policy_check(actions, request, target)
return True
class PolicyTargetMixin(object):
"""Mixin that adds the get_policy_target function
policy_target_attrs - a tuple of tuples which defines
the relationship between attributes in the policy
target dict and attributes in the passed datum object.
policy_target_attrs can be overwritten by sub-classes
which do not use the default, so they can neatly define
their policy target information, without overriding the
entire get_policy_target function.
"""
policy_target_attrs = (("project_id", "tenant_id"),
("user_id", "user_id"),
("domain_id", "domain_id"))
def get_policy_target(self, request, datum=None):
policy_target = {}
for policy_attr, datum_attr in self.policy_target_attrs:
if datum:
policy_target[policy_attr] = getattr(datum, datum_attr, None)
else:
policy_target[policy_attr] = None
return policy_target