remove stopped users from proxy on startup

We already added running users, but we didn't handle removing users from the proxy
if the user's server was stopped (e.g. while the Hub was restarting).

jupyterhub/app.py

@@ -1112,7 +1112,7 @@ class JupyterHub(Application):
         if self.proxy.public_server.is_up() or self.proxy.api_server.is_up():
             # check for *authenticated* access to the proxy (auth token can change)
             try:
-                yield self.proxy.get_routes()
+                routes = yield self.proxy.get_routes()
             except (HTTPError, OSError, socket.error) as e:
                 if isinstance(e, HTTPError) and e.code == 403:
                     msg = "Did CONFIGPROXY_AUTH_TOKEN change?"
@@ -1124,6 +1124,7 @@ class JupyterHub(Application):
                 return
             else:
                 self.log.info("Proxy already running at: %s", self.proxy.public_server.bind_url)
+                yield self.proxy.check_routes(self.users, self._service_map, routes)
             self.proxy_process = None
             return
 

jupyterhub/orm.py

@@ -257,19 +257,17 @@ class Proxy(Base):
         user_routes = { r['user'] for r in routes.values() if 'user' in r }
         futures = []
         db = inspect(self).session
-        for orm_user in db.query(User).filter(User.server != None):
+        for orm_user in db.query(User):
             user = user_dict[orm_user]
-            if not user.running:
-                # Don't add users to the proxy that haven't finished starting
-                continue
-            if user.server is None:
-                # This should never be True, but seems to be on rare occasion.
-                # catch filter bug, either in sqlalchemy or my understanding of its behavior
-                self.log.error("User %s has no server, but wasn't filtered out.", user)
-                continue
-            if user.name not in user_routes:
-                self.log.warning("Adding missing route for %s (%s)", user.name, user.server)
-                futures.append(self.add_user(user))
+            if user.running:
+                if user.name not in user_routes:
+                    self.log.warning("Adding missing route for %s (%s)", user.name, user.server)
+                    futures.append(self.add_user(user))
+            else:
+                # User not running, make sure it's not in the table
+                if user.name in user_routes:
+                    self.log.warning("Removing route for not running %s", user.name)
+                    futures.append(self.delete_user(user))
         
         # check service routes
         service_routes = { r['service'] for r in routes.values() if 'service' in r }

jupyterhub/user.py

@@ -161,9 +161,9 @@ class User(HasTraits):
     @property
     def proxy_path(self):
         if self.settings.get('subdomain_host'):
-            return url_path_join('/' + self.domain, self.server.base_url)
+            return url_path_join('/' + self.domain, self.base_url)
         else:
-            return self.server.base_url
+            return self.base_url
     
     @property
     def domain(self):