131 lines
4.8 KiB
Python
131 lines
4.8 KiB
Python
# Copyright (c) 2013 OpenStack Foundation
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#
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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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"""
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WSGI middleware for OpenStack API controllers.
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"""
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from oslo_log import log as logging
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from oslo_service import wsgi as base_wsgi
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import routes
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from cinder.api.openstack import wsgi
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from cinder.i18n import _
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LOG = logging.getLogger(__name__)
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class APIMapper(routes.Mapper):
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def routematch(self, url=None, environ=None):
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if url == "":
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result = self._match("", environ)
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return result[0], result[1]
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return routes.Mapper.routematch(self, url, environ)
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def connect(self, *args, **kwargs):
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# NOTE(inhye): Default the format part of a route to only accept json
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# so it doesn't eat all characters after a '.'
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# in the url.
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kwargs.setdefault('requirements', {})
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if not kwargs['requirements'].get('format'):
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kwargs['requirements']['format'] = 'json'
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return routes.Mapper.connect(self, *args, **kwargs)
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class ProjectMapper(APIMapper):
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def resource(self, member_name, collection_name, **kwargs):
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if 'parent_resource' not in kwargs:
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kwargs['path_prefix'] = '{project_id}/'
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else:
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parent_resource = kwargs['parent_resource']
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p_collection = parent_resource['collection_name']
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p_member = parent_resource['member_name']
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kwargs['path_prefix'] = '{project_id}/%s/:%s_id' % (p_collection,
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p_member)
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routes.Mapper.resource(self,
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member_name,
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collection_name,
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**kwargs)
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class APIRouter(base_wsgi.Router):
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"""Routes requests on the API to the appropriate controller and method."""
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ExtensionManager = None # override in subclasses
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@classmethod
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def factory(cls, global_config, **local_config):
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"""Simple paste factory, :class:`cinder.wsgi.Router` doesn't have."""
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return cls()
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def __init__(self, ext_mgr=None):
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if ext_mgr is None:
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if self.ExtensionManager:
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ext_mgr = self.ExtensionManager()
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else:
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raise Exception(_("Must specify an ExtensionManager class"))
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mapper = ProjectMapper()
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self.resources = {}
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self._setup_routes(mapper, ext_mgr)
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self._setup_ext_routes(mapper, ext_mgr)
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self._setup_extensions(ext_mgr)
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super(APIRouter, self).__init__(mapper)
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def _setup_ext_routes(self, mapper, ext_mgr):
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for resource in ext_mgr.get_resources():
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LOG.debug('Extended resource: %s',
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resource.collection)
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wsgi_resource = wsgi.Resource(resource.controller)
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self.resources[resource.collection] = wsgi_resource
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kargs = dict(
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controller=wsgi_resource,
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collection=resource.collection_actions,
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member=resource.member_actions)
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if resource.parent:
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kargs['parent_resource'] = resource.parent
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mapper.resource(resource.collection, resource.collection, **kargs)
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if resource.custom_routes_fn:
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resource.custom_routes_fn(mapper, wsgi_resource)
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def _setup_extensions(self, ext_mgr):
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for extension in ext_mgr.get_controller_extensions():
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collection = extension.collection
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controller = extension.controller
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if collection not in self.resources:
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LOG.warning('Extension %(ext_name)s: Cannot extend '
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'resource %(collection)s: No such resource',
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{'ext_name': extension.extension.name,
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'collection': collection})
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continue
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LOG.debug('Extension %(ext_name)s extending resource: '
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'%(collection)s',
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{'ext_name': extension.extension.name,
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'collection': collection})
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resource = self.resources[collection]
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resource.register_actions(controller)
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resource.register_extensions(controller)
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def _setup_routes(self, mapper, ext_mgr):
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raise NotImplementedError
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