OpenStack Identity (Keystone)
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# 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
# 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 flask
from flask import request
import http.client
from oslo_serialization import jsonutils
from keystone.common import json_home
import keystone.conf
from keystone.server import flask as ks_flask
CONF = keystone.conf.CONF
MEDIA_TYPE_JSON = 'application/vnd.openstack.identity-%s+json'
_DISCOVERY_BLUEPRINT = flask.Blueprint('Discovery', __name__)
def _get_versions_list(identity_url):
versions = {}
versions['v3'] = {
'id': 'v3.14',
'status': 'stable',
'updated': '2020-04-07T00:00:00Z',
'links': [{
'rel': 'self',
'href': identity_url,
'media-types': [{
'base': 'application/json',
'type': MEDIA_TYPE_JSON % 'v3'
return versions
class MimeTypes(object):
JSON = 'application/json'
JSON_HOME = 'application/json-home'
def v3_mime_type_best_match():
if not request.accept_mimetypes:
return MimeTypes.JSON
return request.accept_mimetypes.best_match(
[MimeTypes.JSON, MimeTypes.JSON_HOME])
def get_versions():
if v3_mime_type_best_match() == MimeTypes.JSON_HOME:
# RENDER JSON-Home form, we have a clever client who will
# understand the JSON-Home document.
v3_json_home = json_home.JsonHomeResources.resources()
json_home.translate_urls(v3_json_home, '/v3')
return flask.Response(response=jsonutils.dumps(v3_json_home),
identity_url = '%s/' % ks_flask.base_url()
versions = _get_versions_list(identity_url)
# Set the preferred version to the latest "stable" version.
# TODO(morgan): If we ever have more API versions find the latest
# stable version instead of just using the "base_url", for now we
# simply have a single version so use it as the preferred location.
preferred_location = identity_url
response = flask.Response(
{'versions': {
'values': list(versions.values())}}),
response.headers['Location'] = preferred_location
return response
def get_version_v3():
if v3_mime_type_best_match() == MimeTypes.JSON_HOME:
# RENDER JSON-Home form, we have a clever client who will
# understand the JSON-Home document.
content = json_home.JsonHomeResources.resources()
return flask.Response(response=jsonutils.dumps(content),
identity_url = '%s/' % ks_flask.base_url()
versions = _get_versions_list(identity_url)
return flask.Response(
response=jsonutils.dumps({'version': versions['v3']}),
class DiscoveryAPI(object):
# NOTE(morgan): The Discovery Bits are so special they cannot conform to
# Flask-RESTful-isms. We are using straight flask Blueprint(s) here so that
# we have a lot more control over what the heck is going on. This is just
# a stub object to ensure we can load discovery in the same manner we
# handle the rest of keystone.api
def instantiate_and_register_to_app(flask_app):
# This is a lot more magical than the normal setup as the discovery
# API does not lean on flask-restful. We're statically building a
# single blueprint here.
APIs = (DiscoveryAPI,)