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# Copyright 2011 OpenStack Foundation
# All Rights Reserved.
#
# 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.
from webob import exc
from nova.api.openstack import common
from nova.api.openstack import wsgi
from nova import exception
from nova.image import glance
from nova.openstack.common.gettextutils import _
class Controller(object):
"""The image metadata API controller for the OpenStack API."""
def __init__(self):
self.image_service = glance.get_default_image_service()
def _get_image(self, context, image_id):
try:
return self.image_service.show(context, image_id)
except exception.NotFound:
msg = _("Image not found.")
raise exc.HTTPNotFound(explanation=msg)
@wsgi.serializers(xml=common.MetadataTemplate)
def index(self, req, image_id):
"""Returns the list of metadata for a given instance."""
context = req.environ['nova.context']
metadata = self._get_image(context, image_id)['properties']
return dict(metadata=metadata)
@wsgi.serializers(xml=common.MetaItemTemplate)
def show(self, req, image_id, id):
context = req.environ['nova.context']
metadata = self._get_image(context, image_id)['properties']
if id in metadata:
return {'meta': {id: metadata[id]}}
else:
raise exc.HTTPNotFound()
@wsgi.serializers(xml=common.MetadataTemplate)
@wsgi.deserializers(xml=common.MetadataDeserializer)
def create(self, req, image_id, body):
context = req.environ['nova.context']
image = self._get_image(context, image_id)
if 'metadata' in body:
for key, value in body['metadata'].iteritems():
image['properties'][key] = value
common.check_img_metadata_properties_quota(context,
image['properties'])
try:
image = self.image_service.update(context, image_id, image, None)
except exception.ImageNotAuthorized as e:
raise exc.HTTPForbidden(explanation=e.format_message())
return dict(metadata=image['properties'])
@wsgi.serializers(xml=common.MetaItemTemplate)
@wsgi.deserializers(xml=common.MetaItemDeserializer)
def update(self, req, image_id, id, body):
context = req.environ['nova.context']
try:
meta = body['meta']
except KeyError:
expl = _('Incorrect request body format')
raise exc.HTTPBadRequest(explanation=expl)
if id not in meta:
expl = _('Request body and URI mismatch')
raise exc.HTTPBadRequest(explanation=expl)
if len(meta) > 1:
expl = _('Request body contains too many items')
raise exc.HTTPBadRequest(explanation=expl)
image = self._get_image(context, image_id)
image['properties'][id] = meta[id]
common.check_img_metadata_properties_quota(context,
image['properties'])
try:
self.image_service.update(context, image_id, image, None)
except exception.ImageNotAuthorized as e:
raise exc.HTTPForbidden(explanation=e.format_message())
return dict(meta=meta)
@wsgi.serializers(xml=common.MetadataTemplate)
@wsgi.deserializers(xml=common.MetadataDeserializer)
def update_all(self, req, image_id, body):
context = req.environ['nova.context']
image = self._get_image(context, image_id)
metadata = body.get('metadata', {})
common.check_img_metadata_properties_quota(context, metadata)
image['properties'] = metadata
try:
self.image_service.update(context, image_id, image, None)
except exception.ImageNotAuthorized as e:
raise exc.HTTPForbidden(explanation=e.format_message())
return dict(metadata=metadata)
@wsgi.response(204)
def delete(self, req, image_id, id):
context = req.environ['nova.context']
image = self._get_image(context, image_id)
if id not in image['properties']:
msg = _("Invalid metadata key")
raise exc.HTTPNotFound(explanation=msg)
image['properties'].pop(id)
try:
self.image_service.update(context, image_id, image, None)
except exception.ImageNotAuthorized as e:
raise exc.HTTPForbidden(explanation=e.format_message())
def create_resource():
return wsgi.Resource(Controller())
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