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OpenStack Study: versions.py**** CubicPower OpenStack Study ****
# Copyright 2010-2011 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. import copy import os
**** CubicPower OpenStack Study **** def get_view_builder(req): base_url = req.application_url return ViewBuilder(base_url)
**** CubicPower OpenStack Study **** class ViewBuilder(object):
**** CubicPower OpenStack Study **** def __init__(self, base_url): """Initialize ViewBuilder. :param base_url: url of the root wsgi application """ self.base_url = base_url
**** CubicPower OpenStack Study **** def build_choices(self, VERSIONS, req): version_objs = [] for version in VERSIONS: version = VERSIONS[version] version_objs.append({ "id": version['id'], "status": version['status'], "links": [{"rel": "self", "href": self.generate_href(version['id'], req.path), }, ], "media-types": version['media-types'], }) return dict(choices=version_objs)
**** CubicPower OpenStack Study **** def build_versions(self, versions): version_objs = [] for version in sorted(versions.keys()): version = versions[version] version_objs.append({ "id": version['id'], "status": version['status'], "updated": version['updated'], "links": self._build_links(version), }) return dict(versions=version_objs)
**** CubicPower OpenStack Study **** def build_version(self, version): reval = copy.deepcopy(version) reval['links'].insert(0, { "rel": "self", "href": self.base_url.rstrip('/') + '/', }) return dict(version=reval)
**** CubicPower OpenStack Study **** def _build_links(self, version_data): """Generate a container of links that refer to the provided version.""" href = self.generate_href(version_data['id']) links = [{'rel': 'self', 'href': href, }, ] return links
**** CubicPower OpenStack Study **** def generate_href(self, version, path=None): """Create an url that refers to a specific version_number.""" if version.find('v1.') == 0: version_number = 'v1' else: version_number = 'v2' if path: path = path.strip('/') return os.path.join(self.base_url, version_number, path) else: return os.path.join(self.base_url, version_number) + '/'
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