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OpenStack Study: context.py**** CubicPower OpenStack Study ****
# vim: tabstop=4 shiftwidth=4 softtabstop=4 # Copyright 2011 OpenStack Foundation. # All Rights Reserved. # # 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. """ Simple class that stores security context information in the web request. Projects should subclass this class if they wish to enhance the request context or provide additional information in their specific WSGI pipeline. """ import itertools from nova.openstack.common import uuidutils
**** CubicPower OpenStack Study **** def generate_request_id(): return 'req-%s' % uuidutils.generate_uuid()
**** CubicPower OpenStack Study **** class RequestContext(object): """Helper class to represent useful information about a request context. Stores information about the security context under which the user accesses the system, as well as additional request information. """
**** CubicPower OpenStack Study **** def __init__(self, auth_token=None, user=None, tenant=None, is_admin=False, read_only=False, show_deleted=False, request_id=None): self.auth_token = auth_token self.user = user self.tenant = tenant self.is_admin = is_admin self.read_only = read_only self.show_deleted = show_deleted if not request_id: request_id = generate_request_id() self.request_id = request_id
**** CubicPower OpenStack Study **** def to_dict(self): return {'user': self.user, 'tenant': self.tenant, 'is_admin': self.is_admin, 'read_only': self.read_only, 'show_deleted': self.show_deleted, 'auth_token': self.auth_token, 'request_id': self.request_id} def get_admin_context(show_deleted=False): context = RequestContext(None, tenant=None, is_admin=True, show_deleted=show_deleted) return context def get_context_from_function_and_args(function, args, kwargs): """Find an arg of type RequestContext and return it. This is useful in a couple of decorators where we don't know much about the function we're wrapping. """ for arg in itertools.chain(kwargs.values(), args): if isinstance(arg, RequestContext): return arg return None
**** CubicPower OpenStack Study **** def get_admin_context(show_deleted=False): context = RequestContext(None, tenant=None, is_admin=True, show_deleted=show_deleted) return context
**** CubicPower OpenStack Study **** def get_context_from_function_and_args(function, args, kwargs): """Find an arg of type RequestContext and return it. This is useful in a couple of decorators where we don't know much about the function we're wrapping. """ for arg in itertools.chain(kwargs.values(), args): if isinstance(arg, RequestContext): return arg return None
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