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# Copyright 2012 OpenStack Foundation
#
# 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 oslo_serialization import jsonutils
import webob
from keystone.common import extension
from keystone.common import json_home
from keystone.common import wsgi
from keystone import exception
MEDIA_TYPE_JSON = 'application/vnd.openstack.identity-%s+json'
_VERSIONS = []
# NOTE(blk-u): latest_app will be set by keystone.version.service.loadapp(). It
# gets set to the application that was just loaded. In the case of keystone-all
# loadapp() gets called twice, once for the public app and once for the admin
# app. In the case of httpd/keystone, loadapp() gets called once for the public
# app if this is the public instance or loadapp() gets called for the admin app
# if it's the admin instance.
# This is used to fetch the /v3 JSON Home response. The /v3 JSON Home response
# is the same whether it's the admin or public service so either admin or
# public works.
latest_app = None
def request_v3_json_home(new_prefix):
if 'v3' not in _VERSIONS:
# No V3 support, so return an empty JSON Home document.
return {'resources': {}}
req = webob.Request.blank(
'/v3', headers={'Accept': 'application/json-home'})
v3_json_home_str = req.get_response(latest_app).body
v3_json_home = jsonutils.loads(v3_json_home_str)
json_home.translate_urls(v3_json_home, new_prefix)
return v3_json_home
class Extensions(wsgi.Application):
"""Base extensions controller to be extended by public and admin API's."""
# extend in subclass to specify the set of extensions
@property
def extensions(self):
return None
def get_extensions_info(self, context):
return {'extensions': {'values': list(self.extensions.values())}}
def get_extension_info(self, context, extension_alias):
try:
return {'extension': self.extensions[extension_alias]}
except KeyError:
raise exception.NotFound(target=extension_alias)
class AdminExtensions(Extensions):
@property
def extensions(self):
return extension.ADMIN_EXTENSIONS
class PublicExtensions(Extensions):
@property
def extensions(self):
return extension.PUBLIC_EXTENSIONS
def register_version(version):
_VERSIONS.append(version)
class MimeTypes(object):
JSON = 'application/json'
JSON_HOME = 'application/json-home'
def v3_mime_type_best_match(context):
# accept_header is a WebOb MIMEAccept object so supports best_match.
accept_header = context['accept_header']
if not accept_header:
return MimeTypes.JSON
SUPPORTED_TYPES = [MimeTypes.JSON, MimeTypes.JSON_HOME]
return accept_header.best_match(SUPPORTED_TYPES)
class Version(wsgi.Application):
def __init__(self, version_type, routers=None):
self.endpoint_url_type = version_type
self._routers = routers
super(Version, self).__init__()
def _get_identity_url(self, context, version):
"""Returns a URL to keystone's own endpoint."""
url = self.base_url(context, self.endpoint_url_type)
return '%s/%s/' % (url, version)
def _get_versions_list(self, context):
"""The list of versions is dependent on the context."""
versions = {}
if 'v2.0' in _VERSIONS:
versions['v2.0'] = {
'id': 'v2.0',
'status': 'stable',
'updated': '2014-04-17T00:00:00Z',
'links': [
{
'rel': 'self',
'href': self._get_identity_url(context, 'v2.0'),
}, {
'rel': 'describedby',
'type': 'text/html',
'href': 'http://docs.openstack.org/'
}
],
'media-types': [
{
'base': 'application/json',
'type': MEDIA_TYPE_JSON % 'v2.0'
}
]
}
if 'v3' in _VERSIONS:
versions['v3'] = {
'id': 'v3.6',
'status': 'stable',
'updated': '2016-04-04T00:00:00Z',
'links': [
{
'rel': 'self',
'href': self._get_identity_url(context, 'v3'),
}
],
'media-types': [
{
'base': 'application/json',
'type': MEDIA_TYPE_JSON % 'v3'
}
]
}
return versions
def get_versions(self, context):
req_mime_type = v3_mime_type_best_match(context)
if req_mime_type == MimeTypes.JSON_HOME:
v3_json_home = request_v3_json_home('/v3')
return wsgi.render_response(
body=v3_json_home,
headers=(('Content-Type', MimeTypes.JSON_HOME),))
versions = self._get_versions_list(context)
return wsgi.render_response(status=(300, 'Multiple Choices'), body={
'versions': {
'values': list(versions.values())
}
})
def get_version_v2(self, context):
versions = self._get_versions_list(context)
if 'v2.0' in _VERSIONS:
return wsgi.render_response(body={
'version': versions['v2.0']
})
else:
raise exception.VersionNotFound(version='v2.0')
def _get_json_home_v3(self):
def all_resources():
for router in self._routers:
for resource in router.v3_resources:
yield resource
return {
'resources': dict(all_resources())
}
def get_version_v3(self, context):
versions = self._get_versions_list(context)
if 'v3' in _VERSIONS:
req_mime_type = v3_mime_type_best_match(context)
if req_mime_type == MimeTypes.JSON_HOME:
return wsgi.render_response(
body=self._get_json_home_v3(),
headers=(('Content-Type', MimeTypes.JSON_HOME),))
return wsgi.render_response(body={
'version': versions['v3']
})
else:
raise exception.VersionNotFound(version='v3')
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