Fix exception handling in the registry health check and make sure the user_loader is registered before the process is forked

app.py

@@ -5,7 +5,7 @@ import yaml
 
 from flask import Flask as BaseFlask, Config as BaseConfig, request, Request
 from flask.ext.principal import Principal
-from flask.ext.login import LoginManager
+from flask.ext.login import LoginManager, UserMixin
 from flask.ext.mail import Mail
 
 import features
@@ -150,5 +150,29 @@ database.configure(app.config)
 model.config.app_config = app.config
 model.config.store = storage
 
+@login_manager.user_loader
+def load_user(user_uuid):
+  logger.debug('User loader loading deferred user with uuid: %s' % user_uuid)
+  return LoginWrappedDBUser(user_uuid)
+
+class LoginWrappedDBUser(UserMixin):
+  def __init__(self, user_uuid, db_user=None):
+    self._uuid = user_uuid
+    self._db_user = db_user
+
+  def db_user(self):
+    if not self._db_user:
+      self._db_user = model.get_user_by_uuid(self._uuid)
+    return self._db_user
+
+  def is_authenticated(self):
+    return self.db_user() is not None
+
+  def is_active(self):
+    return self.db_user().verified
+
+  def get_id(self):
+    return unicode(self._uuid)
+
 def get_app_url():
   return '%s://%s' % (app.config['PREFERRED_URL_SCHEME'], app.config['SERVER_HOSTNAME'])