text: # Copyright 2010 United States Government as represented by the
  # Administrator of the National Aeronautics and Space Administration.
  # All Rights Reserved.
  # Copyright 2012 Red Hat, Inc.
  #
  #    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 oslo_config import cfg
  from oslo_middleware import cors
  
  from magnum.common import rpc
  from magnum import version
  
  
  def parse_args(argv, default_config_files=None):
      rpc.set_defaults(control_exchange='magnum')
      cfg.CONF(argv[1:],
               project='magnum',
               version=version.version_info.release_string(),
               default_config_files=default_config_files)
      rpc.init(cfg.CONF)
  
  
  def set_config_defaults():
      """This method updates all configuration default values."""
      set_cors_middleware_defaults()
  
  
  def set_cors_middleware_defaults():
      """Update default configuration options for oslo.middleware."""
      # CORS Defaults
      # TODO(krotscheck): Update with https://review.openstack.org/#/c/285368/
      cfg.set_defaults(cors.CORS_OPTS,
                       allow_headers=['X-Auth-Token',
                                      'X-Identity-Status',
                                      'X-Roles',
                                      'X-Service-Catalog',
                                      'X-User-Id',
                                      'X-Tenant-Id',
                                      'X-OpenStack-Request-ID',
                                      'X-Server-Management-Url'],
                       expose_headers=['X-Auth-Token',
                                       'X-Subject-Token',
                                       'X-Service-Token',
                                       'X-OpenStack-Request-ID',
                                       'X-Server-Management-Url'],
                       allow_methods=['GET',
                                      'PUT',
                                      'POST',
                                      'DELETE',
                                      'PATCH']
                       )
  