119 lines
4.2 KiB
Python
119 lines
4.2 KiB
Python
# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import flask
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from flask import request
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import http.client
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from oslo_serialization import jsonutils
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from keystone.common import json_home
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import keystone.conf
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from keystone.server import flask as ks_flask
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CONF = keystone.conf.CONF
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MEDIA_TYPE_JSON = 'application/vnd.openstack.identity-%s+json'
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_DISCOVERY_BLUEPRINT = flask.Blueprint('Discovery', __name__)
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def _get_versions_list(identity_url):
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versions = {}
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versions['v3'] = {
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'id': 'v3.14',
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'status': 'stable',
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'updated': '2020-04-07T00:00:00Z',
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'links': [{
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'rel': 'self',
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'href': identity_url,
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}],
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'media-types': [{
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'base': 'application/json',
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'type': MEDIA_TYPE_JSON % 'v3'
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}]
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}
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return versions
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class MimeTypes(object):
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JSON = 'application/json'
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JSON_HOME = 'application/json-home'
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def v3_mime_type_best_match():
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if not request.accept_mimetypes:
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return MimeTypes.JSON
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return request.accept_mimetypes.best_match(
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[MimeTypes.JSON, MimeTypes.JSON_HOME])
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@_DISCOVERY_BLUEPRINT.route('/')
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def get_versions():
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if v3_mime_type_best_match() == MimeTypes.JSON_HOME:
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# RENDER JSON-Home form, we have a clever client who will
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# understand the JSON-Home document.
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v3_json_home = json_home.JsonHomeResources.resources()
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json_home.translate_urls(v3_json_home, '/v3')
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return flask.Response(response=jsonutils.dumps(v3_json_home),
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mimetype=MimeTypes.JSON_HOME)
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else:
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identity_url = '%s/' % ks_flask.base_url()
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versions = _get_versions_list(identity_url)
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# Set the preferred version to the latest "stable" version.
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# TODO(morgan): If we ever have more API versions find the latest
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# stable version instead of just using the "base_url", for now we
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# simply have a single version so use it as the preferred location.
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preferred_location = identity_url
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response = flask.Response(
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response=jsonutils.dumps(
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{'versions': {
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'values': list(versions.values())}}),
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mimetype=MimeTypes.JSON,
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status=http.client.MULTIPLE_CHOICES)
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response.headers['Location'] = preferred_location
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return response
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@_DISCOVERY_BLUEPRINT.route('/v3')
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def get_version_v3():
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if v3_mime_type_best_match() == MimeTypes.JSON_HOME:
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# RENDER JSON-Home form, we have a clever client who will
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# understand the JSON-Home document.
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content = json_home.JsonHomeResources.resources()
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return flask.Response(response=jsonutils.dumps(content),
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mimetype=MimeTypes.JSON_HOME)
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else:
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identity_url = '%s/' % ks_flask.base_url()
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versions = _get_versions_list(identity_url)
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return flask.Response(
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response=jsonutils.dumps({'version': versions['v3']}),
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mimetype=MimeTypes.JSON)
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class DiscoveryAPI(object):
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# NOTE(morgan): The Discovery Bits are so special they cannot conform to
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# Flask-RESTful-isms. We are using straight flask Blueprint(s) here so that
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# we have a lot more control over what the heck is going on. This is just
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# a stub object to ensure we can load discovery in the same manner we
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# handle the rest of keystone.api
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@staticmethod
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def instantiate_and_register_to_app(flask_app):
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# This is a lot more magical than the normal setup as the discovery
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# API does not lean on flask-restful. We're statically building a
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# single blueprint here.
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flask_app.register_blueprint(_DISCOVERY_BLUEPRINT)
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APIs = (DiscoveryAPI,)
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