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# Copyright 2012 Managed I.T.
#
# Author: Kiall Mac Innes <kiall@managedit.ie>
#
# 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.
import abc
from stevedore import extension
from urllib import parse
from oslo_serialization import jsonutils
from designateclient import exceptions
class Controller(object, metaclass=abc.ABCMeta):
def __init__(self, client):
self.client = client
def build_url(self, url, criterion=None, marker=None, limit=None):
params = criterion or {}
if marker is not None:
params['marker'] = marker
if limit is not None:
params['limit'] = limit
q = parse.urlencode(params) if params else ''
return '%(url)s%(params)s' % {
'url': url,
'params': '?%s' % q
}
def _serialize(self, kwargs):
headers = kwargs.get('headers')
content_type = headers.get('Content-Type') if headers else None
if 'data' in kwargs and content_type in {None, 'application/json'}:
kwargs['data'] = jsonutils.dumps(kwargs['data'])
def _post(self, url, response_key=None, **kwargs):
self._serialize(kwargs)
resp, body = self.client.session.post(url, **kwargs)
if response_key is not None:
return body[response_key]
return body
def _get(self, url, response_key=None):
resp, body = self.client.session.get(url)
if response_key is not None:
return body[response_key]
return body
def _patch(self, url, response_key=None, **kwargs):
self._serialize(kwargs)
resp, body = self.client.session.patch(url, **kwargs)
if response_key is not None:
return body[response_key]
return body
def _put(self, url, response_key=None, **kwargs):
self._serialize(kwargs)
resp, body = self.client.session.put(url, **kwargs)
if response_key is not None:
return body[response_key]
return body
def _delete(self, url, response_key=None, **kwargs):
resp, body = self.client.session.delete(url, **kwargs)
if response_key is not None:
return body[response_key]
return body
class CrudController(Controller, metaclass=abc.ABCMeta):
@abc.abstractmethod
def list(self, *args, **kw):
"""
List a resource
"""
@abc.abstractmethod
def get(self, *args, **kw):
"""
Get a resource
"""
@abc.abstractmethod
def create(self, *args, **kw):
"""
Create a resource
"""
@abc.abstractmethod
def update(self, *args, **kw):
"""
Update a resource
"""
@abc.abstractmethod
def delete(self, *args, **kw):
"""
Delete a resource
"""
def get_versions():
mgr = extension.ExtensionManager('designateclient.versions')
return dict([(ep.name, ep.plugin) for ep in mgr.extensions])
def Client(version, *args, **kwargs): # noqa
versions = get_versions()
if version not in versions:
msg = 'Version %s is not supported, use one of (%s)' % (
version, list(versions.keys()))
raise exceptions.UnsupportedVersion(msg)
return versions[version](*args, **kwargs)
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