webui: Redirect to login page if not authenticated on POST request

* Remove the authentication requirement on GET operation
* "main.js": Redirect to the login page if POST response 403 forbidden
* "main.js": Use global AJAX events handling instead of `$.ajaxSetup()`

4 files changed, 14 insertions, 12 deletions

diff --git a/fg21sim/webui/handlers/configs.py b/fg21sim/webui/handlers/configs.py
index 9736650..296bd11 100644
--- a/fg21sim/webui/handlers/configs.py
+++ b/fg21sim/webui/handlers/configs.py
@@ -26,7 +26,6 @@ class ConfigsAJAXHandler(BaseRequestHandler):
         """Hook for subclass initialization.  Called for each request."""
         self.configs = self.application.configmanager
 
-    @tornado.web.authenticated
     def get(self):
         """
         Handle the READ-ONLY configuration manipulations.
diff --git a/fg21sim/webui/handlers/console.py b/fg21sim/webui/handlers/console.py
index 475ccda..91ad075 100644
--- a/fg21sim/webui/handlers/console.py
+++ b/fg21sim/webui/handlers/console.py
@@ -9,7 +9,6 @@ import logging
 import time
 
 import tornado.ioloop
-import tornado.gen
 from tornado.escape import json_decode, json_encode
 
 from .base import BaseRequestHandler
@@ -36,7 +35,6 @@ class ConsoleAJAXHandler(BaseRequestHandler):
         # from another thread, which executes the submitted task.
         self.io_loop = tornado.ioloop.IOLoop.instance()
 
-    @tornado.web.authenticated
     def get(self):
         """
         Handle the READ-ONLY tasks operations.
diff --git a/fg21sim/webui/handlers/index.py b/fg21sim/webui/handlers/index.py
index e95c310..b351619 100644
--- a/fg21sim/webui/handlers/index.py
+++ b/fg21sim/webui/handlers/index.py
@@ -2,11 +2,9 @@
 # MIT license
 
 """
-Login handler
+Index page handler
 """
 
-import tornado.web
-
 from .base import BaseRequestHandler
 
 
@@ -14,6 +12,5 @@ class IndexHandler(BaseRequestHandler):
     """
     Index page handler of the Web UI.
     """
-    @tornado.web.authenticated
     def get(self):
         self.render("index.html")
diff --git a/fg21sim/webui/static/js/main.js b/fg21sim/webui/static/js/main.js
index 27638a7..64b65c1 100644
--- a/fg21sim/webui/static/js/main.js
+++ b/fg21sim/webui/static/js/main.js
@@ -9,12 +9,19 @@
 
 
 /**
- * jQuery settings
+ * jQuery AJAX global callbacks using the global AJAX event handler methods
+ *
+ * NOTE:
+ * It is NOT recommended to use `jQuery.ajaxSetup` which will affect ALL calls
+ * to `jQuery.ajax` or AJAX-based derivatives.
  */
-jQuery.ajaxSetup({
-  error: function (error) {
-    console.error("AJAX request failed: code:", error.status,
-                  ", reason:", error.statusText); }
+$(document).ajaxError(function (event, jqxhr, settings, exception) {
+  console.error("AJAX request failed: code:", jqxhr.status,
+                ", reason:", jqxhr.statusText);
+  if (jqxhr.status === 403) {
+    // Forbidden error: redirect to login page
+    window.location.href = "/login";
+  }
 });
 
 
@@ -37,6 +44,7 @@ var getCookie = function (name) {
   return m ? m[1] : undefined;
 };
 
+
 /**
  * jQuery extension for easier AJAX JSON post
  *