Container Infrastructure Management Service for OpenStack
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#
# 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.i18n import _
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)
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 not manifest_str:
msg = _("'manifest' can't be empty")
raise ValueError(msg)
if manifest_str.startswith('{'):
manifest = json.loads(manifest_str)
else:
try:
manifest = yaml.safe_load(manifest_str)
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