text: # Copyright 2017 AT&T Intellectual Property.  All other 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.
  import logging
  
  from promenade.config import Configuration
  from promenade.control import base
  from promenade import exceptions
  from promenade import policy
  from promenade.utils.validation_message import ValidationMessage
  from promenade import validation
  
  LOG = logging.getLogger(__name__)
  
  
  class ValidateDesignResource(base.BaseResource):
      @policy.ApiEnforcer('kubernetes_provisioner:post_validatedesign')
      def on_post(self, req, resp):
          result = ValidationMessage()
          try:
              json_data = self.req_json(req)
              href = json_data.get('href', None)
              config = Configuration.from_design_ref(
                  href, allow_missing_substitutions=False)
              result = validation.validate_all(config)
          except exceptions.InvalidFormatError as e:
              msg = "Invalid JSON Format: %s" % str(e)
              result.add_error_message(msg, name=e.title)
          except Exception as e:
              result.add_error_message(str(e), name=e.title)
  
          result.update_response(resp)
  