82 lines
2.9 KiB
Python
82 lines
2.9 KiB
Python
# Copyright 2016 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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"""The volume metadata V3 api."""
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import hashlib
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from oslo_serialization import jsonutils
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import six
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from six.moves import http_client
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import webob
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from cinder.api.openstack import wsgi
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from cinder.api.v2 import volume_metadata as volume_meta_v2
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from cinder import exception
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METADATA_MICRO_VERSION = '3.15'
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class Controller(volume_meta_v2.Controller):
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"""The volume metadata API controller for the OpenStack API."""
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def _validate_etag(self, req, volume_id):
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if not req.if_match:
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return True
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context = req.environ['cinder.context']
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metadata = self._get_metadata(context, volume_id)
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data = jsonutils.dumps({"metadata": metadata})
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if six.PY3:
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data = data.encode('utf-8')
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checksum = hashlib.md5(data).hexdigest()
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return checksum in req.if_match.etags
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def _ensure_min_version(self, req, allowed_version):
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version = req.api_version_request
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if not version.matches(allowed_version, None):
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raise exception.VersionNotFoundForAPIMethod(version=version)
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@wsgi.extends
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def index(self, req, volume_id):
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self._ensure_min_version(req, METADATA_MICRO_VERSION)
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metadata = super(Controller, self).index(req, volume_id)
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resp = webob.Response()
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data = jsonutils.dumps(metadata)
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if six.PY3:
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data = data.encode('utf-8')
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resp.headers['Etag'] = hashlib.md5(data).hexdigest()
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resp.body = data
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return resp
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@wsgi.extends
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def update(self, req, volume_id, id, body):
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self._ensure_min_version(req, METADATA_MICRO_VERSION)
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if not self._validate_etag(req, volume_id):
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return webob.Response(status_int=http_client.PRECONDITION_FAILED)
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return super(Controller, self).update(req, volume_id,
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id, body)
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@wsgi.extends
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def update_all(self, req, volume_id, body):
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self._ensure_min_version(req, METADATA_MICRO_VERSION)
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if not self._validate_etag(req, volume_id):
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return webob.Response(status_int=http_client.PRECONDITION_FAILED)
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return super(Controller, self).update_all(req, volume_id,
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body)
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def create_resource():
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return wsgi.Resource(Controller())
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