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# 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
from nova.api.openstack import common
def get_view_builder(req):
base_url = req.application_url
return ViewBuilder(base_url)
class ViewBuilder(common.ViewBuilder):
def __init__(self, base_url):
"""
:param base_url: url of the root wsgi application
"""
self.base_url = base_url
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)
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)
def build_version(self, version):
reval = copy.deepcopy(version)
reval['links'].insert(0, {
"rel": "self",
"href": self.base_url.rstrip('/') + '/',
})
return dict(version=reval)
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
def generate_href(self, version, path=None):
"""Create an url that refers to a specific version_number."""
prefix = self._update_compute_link_prefix(self.base_url)
if version.find('v3.') == 0:
version_number = 'v3'
else:
version_number = 'v2'
if path:
path = path.strip('/')
return os.path.join(prefix, version_number, path)
else:
return os.path.join(prefix, version_number) + '/'
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