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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 codecs
import urllib
import yaml
from collections import OrderedDict
from toscaparser.common.exception import ExceptionCollector
from toscaparser.common.exception import URLException
from toscaparser.utils.gettextutils import _
if hasattr(yaml, 'CSafeLoader'):
yaml_loader = yaml.CSafeLoader
else:
yaml_loader = yaml.SafeLoader
def load_yaml(path, a_file=True):
f = None
try:
if a_file:
f = codecs.open(path, encoding='utf-8', errors='strict')
else:
f = urllib.request.urlopen(path)
contents = f.read()
f.close()
return yaml.load(contents, Loader=yaml_loader)
except urllib.error.URLError as e:
if hasattr(e, 'reason'):
msg = (_('Failed to reach server "%(path)s". Reason is: '
'%(reason)s.')
% {'path': path, 'reason': e.reason})
ExceptionCollector.appendException(URLException(what=msg))
return
elif hasattr(e, 'code'):
msg = (_('The server "%(path)s" couldn\'t fulfill the request. '
'Error code: "%(code)s".')
% {'path': path, 'code': e.code})
ExceptionCollector.appendException(URLException(what=msg))
return
except Exception:
raise
def simple_parse(tmpl_str):
try:
tpl = yaml.load(tmpl_str, Loader=yaml_loader)
except yaml.YAMLError as yea:
ExceptionCollector.appendException(ValueError(yea))
else:
if tpl is None:
tpl = {}
return tpl
def ordered_load(stream, Loader=yaml.Loader, object_pairs_hook=OrderedDict):
class OrderedLoader(Loader):
pass
def construct_mapping(loader, node):
loader.flatten_mapping(node)
return object_pairs_hook(loader.construct_pairs(node))
OrderedLoader.add_constructor(
yaml.resolver.BaseResolver.DEFAULT_MAPPING_TAG,
construct_mapping)
return yaml.load(stream, OrderedLoader)
def simple_ordered_parse(tmpl_str):
try:
tpl = ordered_load(tmpl_str)
except yaml.YAMLError as yea:
ExceptionCollector.appendException(ValueError(yea))
else:
if tpl is None:
tpl = {}
return tpl
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