69 lines
2.3 KiB
Python
69 lines
2.3 KiB
Python
#
|
|
# 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 json
|
|
|
|
import six
|
|
import yaml
|
|
|
|
from magnum.openstack.common._i18n import _
|
|
|
|
|
|
if hasattr(yaml, 'CSafeLoader'):
|
|
yaml_loader = yaml.CSafeLoader
|
|
else:
|
|
yaml_loader = yaml.SafeLoader
|
|
|
|
if hasattr(yaml, 'CSafeDumper'):
|
|
yaml_dumper = yaml.CSafeDumper
|
|
else:
|
|
yaml_dumper = yaml.SafeDumper
|
|
|
|
|
|
def _construct_yaml_str(self, node):
|
|
# Override the default string handling function
|
|
# to always return unicode objects
|
|
return self.construct_scalar(node)
|
|
yaml_loader.add_constructor(u'tag:yaml.org,2002:str', _construct_yaml_str)
|
|
# Unquoted dates like 2013-05-23 in yaml files get loaded as objects of type
|
|
# datetime.data which causes problems in API layer when being processed by
|
|
# openstack.common.jsonutils. Therefore, make unicode string out of timestamps
|
|
# until jsonutils can handle dates.
|
|
yaml_loader.add_constructor(u'tag:yaml.org,2002:timestamp',
|
|
_construct_yaml_str)
|
|
|
|
|
|
def parse(manifest_str):
|
|
'''Takes a string and returns a dict containing the parsed structure.
|
|
This includes determination of whether the string is using the
|
|
JSON or YAML format.
|
|
'''
|
|
if manifest_str.startswith('{'):
|
|
manifest = json.loads(manifest_str)
|
|
else:
|
|
try:
|
|
manifest = yaml.load(manifest_str, Loader=yaml_loader)
|
|
except yaml.YAMLError as yea:
|
|
yea = six.text_type(yea)
|
|
msg = _('Error parsing manifest: %s') % yea
|
|
raise ValueError(msg)
|
|
else:
|
|
if manifest is None:
|
|
manifest = {}
|
|
|
|
if not isinstance(manifest, dict):
|
|
raise ValueError(_('The manifest is not a JSON object '
|
|
'or YAML mapping.'))
|
|
# TODO(yuanying): check manifest version
|
|
return manifest
|