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OpenStack Study: validators.py**** CubicPower OpenStack Study ****
# Copyright 2013 NEC Corporation. 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. """ Internal implementation of request Body validating middleware. """ import jsonschema from nova import exception from nova.openstack.common.gettextutils import _ from nova.openstack.common import uuidutils @jsonschema.FormatChecker.cls_checks('uuid')
**** CubicPower OpenStack Study **** def _validate_uuid_format(instance): return uuidutils.is_uuid_like(instance)
**** CubicPower OpenStack Study **** class _SchemaValidator(object): """A validator class This class is changed from Draft4Validator to validate minimum/maximum value of a string number(e.g. '10'). This changes can be removed when we tighten up the API
**** CubicPower OpenStack Study **** def __init__(self, schema): validators = { 'minimum': self._validate_minimum, 'maximum': self._validate_maximum, } validator_cls = jsonschema.validators.extend(self.validator_org, validators) format_checker = jsonschema.FormatChecker() self.validator = validator_cls(schema, format_checker=format_checker)
**** CubicPower OpenStack Study **** def validate(self, *args, **kwargs): try: self.validator.validate(*args, **kwargs) except jsonschema.ValidationError as ex: # NOTE: For whole OpenStack message consistency, this error # message has been written as the similar format of WSME. if len(ex.path) > 0: detail = _("Invalid input for field/attribute %(path)s." " Value: %(value)s. %(message)s") % { 'path': ex.path.pop(), 'value': ex.instance, 'message': ex.message } else: detail = ex.message raise exception.ValidationError(detail=detail)
**** CubicPower OpenStack Study **** def _number_from_str(self, instance): try: value = int(instance) except (ValueError, TypeError): try: value = float(instance) except (ValueError, TypeError): return None return value
**** CubicPower OpenStack Study **** def _validate_minimum(self, validator, minimum, instance, schema): instance = self._number_from_str(instance) if instance is None: return return self.validator_org.VALIDATORS['minimum'](validator, minimum, instance, schema)
**** CubicPower OpenStack Study **** def _validate_maximum(self, validator, maximum, instance, schema): instance = self._number_from_str(instance) if instance is None: return return self.validator_org.VALIDATORS['maximum'](validator, maximum, instance, schema)
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