From 098656014870aa59d9ffde51c4021a3e21ddfae0 Mon Sep 17 00:00:00 2001
From: Aaron LI <aaronly.me@outlook.com>
Date: Thu, 24 Nov 2016 16:33:52 +0800
Subject: webui: Extend jQuery with "getJSONUncached()"

This jQuery extension sent the AJAX GET request but force the requested
page NOT to be cached by the browser!

NOTE:
IE will by default cache the GET request even the contents has changed.

Credit: https://stackoverflow.com/a/35130770/4856091
---
 fg21sim/webui/static/js/main.js | 33 +++++++++++++++++++++++++++------
 1 file changed, 27 insertions(+), 6 deletions(-)

(limited to 'fg21sim/webui/static')

diff --git a/fg21sim/webui/static/js/main.js b/fg21sim/webui/static/js/main.js
index e6e68c4..c725803 100644
--- a/fg21sim/webui/static/js/main.js
+++ b/fg21sim/webui/static/js/main.js
@@ -107,7 +107,7 @@ var getCookie = function (name) {
 
 
 /**
- * jQuery extension for easier AJAX JSON post
+ * jQuery extension for handy AJAX POST request using JSON
  *
  * NOTE: The XSRF token is extracted from the cookie and posted together.
  *
@@ -124,11 +124,32 @@ jQuery.postJSON = function (url, data, callback) {
     // Credit: https://stackoverflow.com/a/28924601/4856091
     headers: {"X-XSRFToken": getCookie("_xsrf")},
     data: JSON.stringify(data),
-    success: function (response) {
-      if (callback) {
-        callback(response);
-      }
-    }
+    success: callback
+  });
+};
+
+
+/**
+ * jQuery extension for *uncached* AJAX GET request using JSON
+ *
+ * NOTE:
+ * IE will by default cache the GET request even the contents has changed.
+ *
+ * Credit: https://stackoverflow.com/a/35130770/4856091
+ *
+ * @param {String} url - The URL that handles the AJAX requests
+ * @param {Object} data - Data object sent to the server with the request
+ * @param {Function} callback - Function to be called when AJAX succeeded
+ */
+jQuery.getJSONUncached = function (url, data, callback) {
+  return jQuery.ajax({
+    url: url,
+    type: "GET",
+    dataType: "json",
+    data: data,
+    // Force the requested page NOT to be cached by the browser!
+    cache: false,
+    success: callback
   });
 };
 
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