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# Copyright 2016 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.
import jsonschema
from oslo_serialization import base64
from oslo_utils import timeutils
# JSON Schema validator and format checker used for JSON Schema validation
JSONSCHEMA_VALIDATOR = jsonschema.Draft4Validator
FORMAT_CHECKER = jsonschema.draft4_format_checker
# NOTE(gmann): Add customized format checker for 'date-time' format because:
# 1. jsonschema needs strict_rfc3339 or isodate module to be installed
# for proper date-time checking as per rfc3339.
# 2. Nova or other OpenStack components handle the date time format as
# ISO 8601 which is defined in oslo_utils.timeutils
# so this checker will validate the date-time as defined in
# oslo_utils.timeutils
@FORMAT_CHECKER.checks('iso8601-date-time')
def _validate_datetime_format(instance):
try:
if instance is not None:
timeutils.parse_isotime(instance)
except ValueError:
return False
else:
return True
@jsonschema.FormatChecker.cls_checks('base64')
def _validate_base64_format(instance):
try:
if isinstance(instance, str):
instance = instance.encode('utf-8')
base64.decode_as_bytes(instance)
except TypeError:
# The name must be string type. If instance isn't string type, the
# TypeError will be raised at here.
return False
return True
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