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-rw-r--r--tosca2heat/tosca-parser/toscaparser/utils/yamlparser.py86
1 files changed, 86 insertions, 0 deletions
diff --git a/tosca2heat/tosca-parser/toscaparser/utils/yamlparser.py b/tosca2heat/tosca-parser/toscaparser/utils/yamlparser.py
new file mode 100644
index 0000000..713650d
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+++ b/tosca2heat/tosca-parser/toscaparser/utils/yamlparser.py
@@ -0,0 +1,86 @@
+# 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
+from collections import OrderedDict
+
+from six.moves import urllib
+import yaml
+
+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:
+ f = codecs.open(path, encoding='utf-8', errors='strict') if a_file \
+ else urllib.request.urlopen(path)
+ 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 as e:
+ raise
+ return yaml.load(f.read(), Loader=yaml_loader)
+
+
+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