text: # Copyright 2012 Hewlett-Packard Development Company, L.P. All Rights Reserved.
  #
  # Author: Kiall Mac Innes <kiall@hpe.com>
  #
  # 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 flask
  from oslo_config import cfg
  
  cfg.CONF.import_opt('enable_host_header', 'designate.api', group='service:api')
  
  
  def factory(global_config, **local_conf):
      app = flask.Flask('designate.api.versions')
  
      @app.route('/', methods=['GET'])
      def version_list():
          if cfg.CONF['service:api'].enable_host_header:
              url_root = flask.request.url_root
          else:
              url_root = cfg.CONF['service:api'].api_base_uri
  
          return flask.jsonify({
              "versions": {
                  "values": [{
                      'id': 'v2',
                      'status': 'CURRENT',
                      'links': [
                          {
                              'href': url_root.rstrip('/') + '/v2',
                              'rel': 'self',
                          }, {
                              'rel': 'help',
                              'href': 'https://docs.openstack.org/api-ref/dns'
                          }
                      ]
                  }]
              }
          })
  
      return app
  