122 lines
3.7 KiB
Python
122 lines
3.7 KiB
Python
# Copyright 2013 OpenStack Foundation.
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# All Rights Reserved
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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from oslo_serialization import jsonutils
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import six
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from neutronclient._i18n import _
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from neutronclient.common import exceptions as exception
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class ActionDispatcher(object):
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"""Maps method name to local methods through action name."""
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def dispatch(self, *args, **kwargs):
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"""Find and call local method."""
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action = kwargs.pop('action', 'default')
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action_method = getattr(self, str(action), self.default)
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return action_method(*args, **kwargs)
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def default(self, data):
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raise NotImplementedError()
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class DictSerializer(ActionDispatcher):
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"""Default request body serialization."""
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def serialize(self, data, action='default'):
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return self.dispatch(data, action=action)
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def default(self, data):
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return ""
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class JSONDictSerializer(DictSerializer):
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"""Default JSON request body serialization."""
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def default(self, data):
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def sanitizer(obj):
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return six.text_type(obj)
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return jsonutils.dumps(data, default=sanitizer)
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class TextDeserializer(ActionDispatcher):
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"""Default request body deserialization."""
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def deserialize(self, datastring, action='default'):
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return self.dispatch(datastring, action=action)
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def default(self, datastring):
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return {}
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class JSONDeserializer(TextDeserializer):
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def _from_json(self, datastring):
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try:
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return jsonutils.loads(datastring)
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except ValueError:
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msg = _("Cannot understand JSON")
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raise exception.MalformedResponseBody(reason=msg)
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def default(self, datastring):
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return {'body': self._from_json(datastring)}
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# NOTE(maru): this class is duplicated from neutron.wsgi
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class Serializer(object):
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"""Serializes and deserializes dictionaries to certain MIME types."""
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def __init__(self, metadata=None):
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"""Create a serializer based on the given WSGI environment.
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'metadata' is an optional dict mapping MIME types to information
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needed to serialize a dictionary to that type.
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"""
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self.metadata = metadata or {}
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def _get_serialize_handler(self, content_type):
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handlers = {
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'application/json': JSONDictSerializer(),
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}
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try:
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return handlers[content_type]
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except Exception:
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raise exception.InvalidContentType(content_type=content_type)
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def serialize(self, data):
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"""Serialize a dictionary into the specified content type."""
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return self._get_serialize_handler("application/json").serialize(data)
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def deserialize(self, datastring):
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"""Deserialize a string to a dictionary.
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The string must be in the format of a supported MIME type.
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"""
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return self.get_deserialize_handler("application/json").deserialize(
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datastring)
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def get_deserialize_handler(self, content_type):
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handlers = {
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'application/json': JSONDeserializer(),
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}
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try:
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return handlers[content_type]
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except Exception:
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raise exception.InvalidContentType(content_type=content_type)
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