141 lines
4.3 KiB
Python
141 lines
4.3 KiB
Python
# Copyright (c) 2016 NTT DATA
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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 oslo_log import log as logging
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from six.moves import http_client
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import webob.exc
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from masakari.api.openstack import extensions
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from masakari.api.openstack import wsgi
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from masakari import exception
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from masakari.policies import base as base_policies
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from masakari.policies import extension_info as extension_policies
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ALIAS = 'extensions'
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LOG = logging.getLogger(__name__)
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class FakeExtension(object):
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def __init__(self, name, alias, description=""):
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self.name = name
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self.alias = alias
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self.__doc__ = description
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self.version = -1
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class ExtensionInfoController(wsgi.Controller):
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def __init__(self, extension_info):
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self.extension_info = extension_info
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def _translate(self, ext):
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ext_data = {"name": ext.name,
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"alias": ext.alias,
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"description": ext.__doc__,
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"namespace": "", "updated": "",
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"links": []}
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return ext_data
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def _create_fake_ext(self, name, alias, description=""):
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return FakeExtension(name, alias, description)
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def _get_extensions(self, context):
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"""Filter extensions list based on policy."""
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discoverable_extensions = dict()
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for alias, ext in self.extension_info.get_extensions().items():
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action = ':'.join([
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base_policies.MASAKARI_API, alias, 'discoverable'])
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if context.can(action, fatal=False):
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discoverable_extensions[alias] = ext
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else:
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LOG.debug("Filter out extension %s from discover list",
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alias)
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return discoverable_extensions
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@extensions.expected_errors(())
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def index(self, req):
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context = req.environ['masakari.context']
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context.can(extension_policies.EXTENSIONS % 'index')
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discoverable_extensions = self._get_extensions(context)
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sorted_ext_list = sorted(discoverable_extensions.items())
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extensions = []
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for _alias, ext in sorted_ext_list:
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extensions.append(self._translate(ext))
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return dict(extensions=extensions)
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@extensions.expected_errors(http_client.NOT_FOUND)
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def show(self, req, id):
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context = req.environ['masakari.context']
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context.can(extension_policies.EXTENSIONS % 'detail')
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try:
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ext = self._get_extensions(context)[id]
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except KeyError:
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raise webob.exc.HTTPNotFound()
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return dict(extension=self._translate(ext))
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class ExtensionInfo(extensions.V1APIExtensionBase):
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"""Extension information."""
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name = "Extensions"
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alias = ALIAS
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version = 1
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def get_resources(self):
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resources = [
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extensions.ResourceExtension(
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ALIAS, ExtensionInfoController(self.extension_info),
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member_name='extension')]
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return resources
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def get_controller_extensions(self):
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return []
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class LoadedExtensionInfo(object):
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"""Keep track of all loaded API extensions."""
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def __init__(self):
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self.extensions = {}
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def register_extension(self, ext):
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if not self._check_extension(ext):
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return False
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alias = ext.alias
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if alias in self.extensions:
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raise exception.MasakariException(
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"Found duplicate extension: %s" % alias)
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self.extensions[alias] = ext
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return True
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def _check_extension(self, extension):
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"""Checks for required methods in extension objects."""
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try:
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extension.is_valid()
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except AttributeError:
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LOG.exception("Exception loading extension")
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return False
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return True
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def get_extensions(self):
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return self.extensions
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