Allow configuring payload of noauth middleware

This adds the ability to return a catalog in the noauth middleware
response.

Change-Id: I5413ae4eadd5affdd1ae01678b61eafbe50b7919
Related-Bug: #1724263

heat/common/config.py

@@ -369,6 +369,13 @@ volumes_opts = [
                        "This is a temporary workaround until cinder-backup "
                        "service becomes discoverable, see LP#1334856."))]
 
+noauth_group = cfg.OptGroup('noauth')
+noauth_opts = [
+    cfg.StrOpt('token_response',
+               default='',
+               help=_("JSON file containing the content returned by the "
+                      "noauth middleware."))]
+
 
 def startup_sanity_check():
     if (not cfg.CONF.stack_user_domain_id and
@@ -403,6 +410,7 @@ def list_opts():
     yield auth_password_group.name, auth_password_opts
     yield revision_group.name, revision_opts
     yield volumes_group.name, volumes_opts
+    yield noauth_group.name, noauth_opts
     yield profiler.list_opts()[0]
     yield 'clients', default_clients_opts
 

heat/common/noauth.py

@@ -16,6 +16,10 @@
 
 """Middleware that accepts any authentication."""
 
+import json
+import os
+
+from oslo_config import cfg
 from oslo_log import log as logging
 
 LOG = logging.getLogger(__name__)
@@ -25,6 +29,11 @@ class NoAuthProtocol(object):
     def __init__(self, app, conf):
         self.conf = conf
         self.app = app
+        self._token_info = {}
+        response_file = cfg.CONF.noauth.token_response
+        if os.path.exists(response_file):
+            with open(response_file) as f:
+                self._token_info = json.loads(f.read())
 
     def __call__(self, env, start_response):
         """Handle incoming request.
@@ -56,6 +65,8 @@ class NoAuthProtocol(object):
             'HTTP_X_SERVICE_CATALOG': {},
             'HTTP_X_AUTH_USER': username,
             'HTTP_X_AUTH_KEY': 'unset',
+            'HTTP_X_AUTH_URL': 'url',
+            'keystone.token_info': self._token_info,
         }
 
         return headers