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# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Copyright 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.
from lxml import etree
from nova.api.openstack.compute.views import versions as views_versions
from nova.api.openstack import wsgi
from nova.api.openstack import xmlutil
from nova.openstack.common import timeutils
LINKS = {
'v2.0': {
'pdf': 'http://docs.openstack.org/'
'api/openstack-compute/2/os-compute-devguide-2.pdf',
'wadl': 'http://docs.openstack.org/'
'api/openstack-compute/2/wadl/os-compute-2.wadl'
},
}
VERSIONS = {
"v2.0": {
"id": "v2.0",
"status": "CURRENT",
"updated": "2011-01-21T11:33:21Z",
"links": [
{
"rel": "describedby",
"type": "application/pdf",
"href": LINKS['v2.0']['pdf'],
},
{
"rel": "describedby",
"type": "application/vnd.sun.wadl+xml",
"href": LINKS['v2.0']['wadl'],
},
],
"media-types": [
{
"base": "application/xml",
"type": "application/vnd.openstack.compute+xml;version=2",
},
{
"base": "application/json",
"type": "application/vnd.openstack.compute+json;version=2",
}
],
}
}
class MediaTypesTemplateElement(xmlutil.TemplateElement):
def will_render(self, datum):
return 'media-types' in datum
def make_version(elem):
elem.set('id')
elem.set('status')
elem.set('updated')
mts = MediaTypesTemplateElement('media-types')
elem.append(mts)
mt = xmlutil.SubTemplateElement(mts, 'media-type', selector='media-types')
mt.set('base')
mt.set('type')
xmlutil.make_links(elem, 'links')
version_nsmap = {None: xmlutil.XMLNS_COMMON_V10, 'atom': xmlutil.XMLNS_ATOM}
class VersionTemplate(xmlutil.TemplateBuilder):
def construct(self):
root = xmlutil.TemplateElement('version', selector='version')
make_version(root)
return xmlutil.MasterTemplate(root, 1, nsmap=version_nsmap)
class VersionsTemplate(xmlutil.TemplateBuilder):
def construct(self):
root = xmlutil.TemplateElement('versions')
elem = xmlutil.SubTemplateElement(root, 'version', selector='versions')
make_version(elem)
return xmlutil.MasterTemplate(root, 1, nsmap=version_nsmap)
class ChoicesTemplate(xmlutil.TemplateBuilder):
def construct(self):
root = xmlutil.TemplateElement('choices')
elem = xmlutil.SubTemplateElement(root, 'version', selector='choices')
make_version(elem)
return xmlutil.MasterTemplate(root, 1, nsmap=version_nsmap)
class AtomSerializer(wsgi.XMLDictSerializer):
NSMAP = {None: xmlutil.XMLNS_ATOM}
def __init__(self, metadata=None, xmlns=None):
self.metadata = metadata or {}
if not xmlns:
self.xmlns = wsgi.XMLNS_ATOM
else:
self.xmlns = xmlns
def _get_most_recent_update(self, versions):
recent = None
for version in versions:
updated = timeutils.parse_strtime(version['updated'],
'%Y-%m-%dT%H:%M:%SZ')
if not recent:
recent = updated
elif updated > recent:
recent = updated
return recent.strftime('%Y-%m-%dT%H:%M:%SZ')
def _get_base_url(self, link_href):
# Make sure no trailing /
link_href = link_href.rstrip('/')
return link_href.rsplit('/', 1)[0] + '/'
def _create_feed(self, versions, feed_title, feed_id):
feed = etree.Element('feed', nsmap=self.NSMAP)
title = etree.SubElement(feed, 'title')
title.set('type', 'text')
title.text = feed_title
# Set this updated to the most recently updated version
recent = self._get_most_recent_update(versions)
etree.SubElement(feed, 'updated').text = recent
etree.SubElement(feed, 'id').text = feed_id
link = etree.SubElement(feed, 'link')
link.set('rel', 'self')
link.set('href', feed_id)
author = etree.SubElement(feed, 'author')
etree.SubElement(author, 'name').text = 'Rackspace'
etree.SubElement(author, 'uri').text = 'http://www.rackspace.com/'
for version in versions:
feed.append(self._create_version_entry(version))
return feed
def _create_version_entry(self, version):
entry = etree.Element('entry')
etree.SubElement(entry, 'id').text = version['links'][0]['href']
title = etree.SubElement(entry, 'title')
title.set('type', 'text')
title.text = 'Version %s' % version['id']
etree.SubElement(entry, 'updated').text = version['updated']
for link in version['links']:
link_elem = etree.SubElement(entry, 'link')
link_elem.set('rel', link['rel'])
link_elem.set('href', link['href'])
if 'type' in link:
link_elem.set('type', link['type'])
content = etree.SubElement(entry, 'content')
content.set('type', 'text')
content.text = 'Version %s %s (%s)' % (version['id'],
version['status'],
version['updated'])
return entry
class VersionsAtomSerializer(AtomSerializer):
def default(self, data):
versions = data['versions']
feed_id = self._get_base_url(versions[0]['links'][0]['href'])
feed = self._create_feed(versions, 'Available API Versions', feed_id)
return self._to_xml(feed)
class VersionAtomSerializer(AtomSerializer):
def default(self, data):
version = data['version']
feed_id = version['links'][0]['href']
feed = self._create_feed([version], 'About This Version', feed_id)
return self._to_xml(feed)
class Versions(wsgi.Resource):
def __init__(self):
super(Versions, self).__init__(None)
@wsgi.serializers(xml=VersionsTemplate,
atom=VersionsAtomSerializer)
def index(self, req):
"""Return all versions."""
builder = views_versions.get_view_builder(req)
return builder.build_versions(VERSIONS)
@wsgi.serializers(xml=ChoicesTemplate)
@wsgi.response(300)
def multi(self, req):
"""Return multiple choices."""
builder = views_versions.get_view_builder(req)
return builder.build_choices(VERSIONS, req)
def get_action_args(self, request_environment):
"""Parse dictionary created by routes library."""
args = {}
if request_environment['PATH_INFO'] == '/':
args['action'] = 'index'
else:
args['action'] = 'multi'
return args
class VersionV2(object):
@wsgi.serializers(xml=VersionTemplate,
atom=VersionAtomSerializer)
def show(self, req):
builder = views_versions.get_view_builder(req)
return builder.build_version(VERSIONS['v2.0'])
def create_resource():
return wsgi.Resource(VersionV2())
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