Add fake Keystone V3 API handlers

Keystone V2 API is deprecated, V3 should be used instead. This
commit adds fake Keystone V3 API handlers which can be used by
Fuel UI and Fuel CLI for development and functional tests.

Change-Id: If201c247210131ce6ab192362eada250a4f51ce1
Partial-Bug: #1628445
(cherry picked from commit 5c8cbd26e3)

nailgun/nailgun/fake_keystone/urls.py

@@ -16,16 +16,27 @@
 
 import web
 
-from nailgun.fake_keystone.handlers import EndpointsHandler
-from nailgun.fake_keystone.handlers import ServicesHandler
-from nailgun.fake_keystone.handlers import TokensHandler
-from nailgun.fake_keystone.handlers import VersionHandler
+from nailgun.fake_keystone.v2_handlers \
+    import EndpointsHandler as V2EndpointsHandler
+from nailgun.fake_keystone.v2_handlers \
+    import ServicesHandler as V2ServicesHandler
+from nailgun.fake_keystone.v2_handlers \
+    import TokensHandler as V2TokensHandler
+from nailgun.fake_keystone.v2_handlers \
+    import VersionHandler as V2VersionHandler
+
+from nailgun.fake_keystone.v3_handlers \
+    import TokensHandler as V3TokensHandler
+from nailgun.fake_keystone.v3_handlers \
+    import VersionHandler as V3VersionHandler
 
 urls = (
-    r"/v2.0/?$", VersionHandler.__name__,
-    r"/v2.0/tokens/?$", TokensHandler.__name__,
-    r"/v2.0/OS-KSADM/services/?$", ServicesHandler.__name__,
-    r"/v2.0/endpoints/?$", EndpointsHandler.__name__,
+    r"/v2.0/?$", V2VersionHandler,
+    r"/v2.0/tokens/?$", V2TokensHandler,
+    r"/v2.0/OS-KSADM/services/?$", V2ServicesHandler,
+    r"/v2.0/endpoints/?$", V2EndpointsHandler,
+    r"/v3/?$", V3VersionHandler,
+    r"/v3/auth/tokens/?$", V3TokensHandler,
 )
 
 _locals = locals()

nailgun/nailgun/fake_keystone/v3_handlers.py

@@ -0,0 +1,110 @@
+# -*- coding: utf-8 -*-
+
+#    Copyright 2016 Mirantis, Inc.
+#
+#    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 web
+
+from nailgun.api.v1.handlers.base import BaseHandler
+from nailgun.api.v1.handlers.base import handle_errors
+from nailgun.api.v1.handlers.base import serialize
+from nailgun.api.v1.handlers.base import validate
+from nailgun.fake_keystone import generate_token
+from nailgun.fake_keystone import validate_password_credentials
+from nailgun.fake_keystone import validate_token
+from nailgun.settings import settings
+
+
+class TokensHandler(BaseHandler):
+
+    @handle_errors
+    @validate
+    @serialize
+    def GET(self):
+        token = web.ctx.env.get('HTTP_X_SUBJECT_TOKEN', '')
+        if not validate_token(token):
+            raise self.http(401)
+
+        return self._get_token_info()
+
+    @handle_errors
+    @validate
+    @serialize
+    def POST(self):
+        data = self.checked_data()
+        try:
+            if 'password' in data['auth']['identity']['methods']:
+                if not validate_password_credentials(
+                    data['auth']['identity']['password']['user']['name'],
+                    data['auth']['identity']['password']['user']['password']
+                ):
+                    raise self.http(401)
+            elif 'token' in data['auth']['identity']['methods']:
+                if not validate_token(data['auth']['identity']['token']['id']):
+                    raise self.http(401)
+            else:
+                raise self.http(400)
+        except (KeyError, TypeError):
+            raise self.http(400)
+
+        web.header('X-Subject-Token', generate_token())
+
+        return self._get_token_info()
+
+    def _get_token_info(self):
+        return {
+            "token": {
+                "methods": ["password"],
+                "issued_at": "2016-09-29T13:06:37.620739Z",
+                "expires_at": "2016-09-29T19:06:37.620687Z",
+                "roles": [{"name": settings.FAKE_KEYSTONE_ROLE}],
+                "project": {
+                    "domain": {"id": "123", "name": "fuel"},
+                    "id": "456",
+                    "name": "admin"
+                },
+                "user": {
+                    "domain": {"id": "123", "name": "fuel"},
+                    "id": "789",
+                    "name": "admin"
+                },
+                "catalog": [],
+                "audit_ids": ["CZGk7nPaRF-PzmokqvKcDQ"]
+            }
+        }
+
+    def DELETE(self):
+        raise self.http(204)
+
+
+class VersionHandler(BaseHandler):
+
+    @handle_errors
+    @validate
+    @serialize
+    def GET(self):
+        keystone_href = 'http://{ip_addr}:{port}/keystone/v3/'.format(
+            ip_addr=settings.LISTEN_ADDRESS, port=settings.LISTEN_PORT)
+        return {
+            "version": {
+                "id": "v3.6",
+                "status": "stable",
+                "updated": "2016-04-04T00:00:00Z",
+                "media-types": [{
+                    "base": "application/json",
+                    "type": "application/vnd.openstack.identity-v3+json"
+                }],
+                "links": [{"href": keystone_href, "rel": "self"}]
+            }
+        }