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OpenStack Study: cache_manage.py**** CubicPower OpenStack Study ****
# 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. """ Image Cache Management API """ import routes from glance.api import cached_images from glance.common import wsgi import glance.openstack.common.log as logging LOG = logging.getLogger(__name__)
**** CubicPower OpenStack Study **** class CacheManageFilter(wsgi.Middleware):
**** CubicPower OpenStack Study **** def __init__(self, app): mapper = routes.Mapper() resource = cached_images.create_resource() mapper.connect("/v1/cached_images", controller=resource, action="get_cached_images", conditions=dict(method=["GET"])) mapper.connect("/v1/cached_images/{image_id}", controller=resource, action="delete_cached_image", conditions=dict(method=["DELETE"])) mapper.connect("/v1/cached_images", controller=resource, action="delete_cached_images", conditions=dict(method=["DELETE"])) mapper.connect("/v1/queued_images/{image_id}", controller=resource, action="queue_image", conditions=dict(method=["PUT"])) mapper.connect("/v1/queued_images", controller=resource, action="get_queued_images", conditions=dict(method=["GET"])) mapper.connect("/v1/queued_images/{image_id}", controller=resource, action="delete_queued_image", conditions=dict(method=["DELETE"])) mapper.connect("/v1/queued_images", controller=resource, action="delete_queued_images", conditions=dict(method=["DELETE"])) self._mapper = mapper self._resource = resource LOG.info(_("Initialized image cache management middleware")) super(CacheManageFilter, self).__init__(app)
**** CubicPower OpenStack Study **** def process_request(self, request): # Map request to our resource object if we can handle it match = self._mapper.match(request.path_info, request.environ) if match: request.environ['wsgiorg.routing_args'] = (None, match) return self._resource(request) # Pass off downstream if we don't match the request path else: return None
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