Brian Waldon
133 lines
4.8 KiB
Python
133 lines
4.8 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2011 OpenStack LLC.
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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 webob import exc
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from nova import compute
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from nova.api.openstack import faults
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from nova.api.openstack import wsgi
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from nova import exception
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from nova import quota
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class Controller(object):
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""" The server metadata API controller for the Openstack API """
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def __init__(self):
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self.compute_api = compute.API()
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super(Controller, self).__init__()
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def _get_metadata(self, context, server_id):
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metadata = self.compute_api.get_instance_metadata(context, server_id)
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meta_dict = {}
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for key, value in metadata.iteritems():
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meta_dict[key] = value
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return dict(metadata=meta_dict)
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def _check_body(self, body):
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if body == None or body == "":
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expl = _('No Request Body')
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raise exc.HTTPBadRequest(explanation=expl)
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def index(self, req, server_id):
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""" Returns the list of metadata for a given instance """
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context = req.environ['nova.context']
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try:
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return self._get_metadata(context, server_id)
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except exception.InstanceNotFound:
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msg = _('Server %(server_id)s does not exist') % locals()
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raise exc.HTTPNotFound(explanation=msg)
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def create(self, req, server_id, body):
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self._check_body(body)
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context = req.environ['nova.context']
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metadata = body.get('metadata')
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try:
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self.compute_api.update_or_create_instance_metadata(context,
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server_id,
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metadata)
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except exception.InstanceNotFound:
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msg = _('Server %(server_id)s does not exist') % locals()
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raise exc.HTTPNotFound(explanation=msg)
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except quota.QuotaError as error:
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self._handle_quota_error(error)
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return body
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def update(self, req, server_id, id, body):
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self._check_body(body)
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context = req.environ['nova.context']
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if not id in body:
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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(body) > 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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try:
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self.compute_api.update_or_create_instance_metadata(context,
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server_id,
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body)
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except exception.InstanceNotFound:
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msg = _('Server %(server_id)s does not exist') % locals()
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raise exc.HTTPNotFound(explanation=msg)
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except quota.QuotaError as error:
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self._handle_quota_error(error)
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return body
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def show(self, req, server_id, id):
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""" Return a single metadata item """
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context = req.environ['nova.context']
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try:
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data = self._get_metadata(context, server_id)
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except exception.InstanceNotFound:
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msg = _('Server %(server_id)s does not exist') % locals()
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raise exc.HTTPNotFound(explanation=msg)
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try:
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return {id: data['metadata'][id]}
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except KeyError:
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msg = _("metadata item %s was not found" % (id))
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raise exc.HTTPNotFound(explanation=msg)
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def delete(self, req, server_id, id):
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""" Deletes an existing metadata """
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context = req.environ['nova.context']
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try:
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self.compute_api.delete_instance_metadata(context, server_id, id)
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except exception.InstanceNotFound:
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msg = _('Server %(server_id)s does not exist') % locals()
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raise exc.HTTPNotFound(explanation=msg)
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def _handle_quota_error(self, error):
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"""Reraise quota errors as api-specific http exceptions."""
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if error.code == "MetadataLimitExceeded":
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raise exc.HTTPBadRequest(explanation=error.message)
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raise error
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def create_resource():
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body_serializers = {
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'application/xml': wsgi.XMLDictSerializer(xmlns=wsgi.XMLNS_V11),
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}
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serializer = wsgi.ResponseSerializer(body_serializers)
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return wsgi.Resource(Controller(), serializer=serializer)
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