139 lines
5.3 KiB
Python
139 lines
5.3 KiB
Python
# Copyright 2011 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 http import HTTPStatus
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import webob
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from webob import exc
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from cinder.api.openstack import wsgi
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from cinder import exception
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from cinder.i18n import _
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from cinder import volume
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class Controller(wsgi.Controller):
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"""The snapshot metadata API controller for the OpenStack API."""
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def __init__(self):
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self.volume_api = volume.API()
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super(Controller, self).__init__()
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def _get_metadata(self, context, snapshot_id):
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return self._get_snapshot_and_metadata(context, snapshot_id)[1]
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def _get_snapshot_and_metadata(self, context, snapshot_id):
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# Not found exception will be handled at the wsgi level
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snapshot = self.volume_api.get_snapshot(context, snapshot_id)
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meta = self.volume_api.get_snapshot_metadata(context, snapshot)
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return snapshot, meta
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def index(self, req, snapshot_id):
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"""Returns the list of metadata for a given snapshot."""
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context = req.environ['cinder.context']
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return {'metadata': self._get_metadata(context, snapshot_id)}
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def create(self, req, snapshot_id, body):
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self.assert_valid_body(body, 'metadata')
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context = req.environ['cinder.context']
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metadata = body['metadata']
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new_metadata = self._update_snapshot_metadata(context,
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snapshot_id,
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metadata,
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delete=False)
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return {'metadata': new_metadata}
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def update(self, req, snapshot_id, id, body):
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self.assert_valid_body(body, 'meta')
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meta_item = body['meta']
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if id not in meta_item:
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expl = _('Request body and URI mismatch')
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raise exc.HTTPBadRequest(explanation=expl)
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if len(meta_item) > 1:
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expl = _('Request body contains too many items')
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raise exc.HTTPBadRequest(explanation=expl)
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context = req.environ['cinder.context']
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self._update_snapshot_metadata(context,
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snapshot_id,
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meta_item,
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delete=False)
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return {'meta': meta_item}
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def update_all(self, req, snapshot_id, body):
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self.assert_valid_body(body, 'metadata')
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context = req.environ['cinder.context']
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metadata = body['metadata']
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new_metadata = self._update_snapshot_metadata(context,
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snapshot_id,
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metadata,
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delete=True)
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return {'metadata': new_metadata}
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def _update_snapshot_metadata(self, context,
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snapshot_id, metadata,
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delete=False):
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try:
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snapshot = self.volume_api.get_snapshot(context, snapshot_id)
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return self.volume_api.update_snapshot_metadata(context,
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snapshot,
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metadata,
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delete)
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# Not found exception will be handled at the wsgi level
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except (ValueError, AttributeError):
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msg = _("Malformed request body")
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raise exc.HTTPBadRequest(explanation=msg)
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except exception.InvalidVolumeMetadata as error:
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raise exc.HTTPBadRequest(explanation=error.msg)
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except exception.InvalidVolumeMetadataSize as error:
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raise exc.HTTPRequestEntityTooLarge(explanation=error.msg)
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def show(self, req, snapshot_id, id):
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"""Return a single metadata item."""
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context = req.environ['cinder.context']
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data = self._get_metadata(context, snapshot_id)
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try:
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return {'meta': {id: data[id]}}
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except KeyError:
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raise exception.SnapshotMetadataNotFound(snapshot_id=snapshot_id,
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metadata_key=id)
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def delete(self, req, snapshot_id, id):
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"""Deletes an existing metadata."""
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context = req.environ['cinder.context']
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snapshot, metadata = self._get_snapshot_and_metadata(context,
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snapshot_id)
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if id not in metadata:
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raise exception.SnapshotMetadataNotFound(snapshot_id=snapshot_id,
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metadata_key=id)
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self.volume_api.delete_snapshot_metadata(context, snapshot, id)
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return webob.Response(status_int=HTTPStatus.OK)
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def create_resource():
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return wsgi.Resource(Controller())
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