From f03baec73bbc563bd1affe40c9960ca9762fd7a1 Mon Sep 17 00:00:00 2001
From: Michael Jumper <mike.jumper@guac-dev.org>
Date: Tue, 1 Jul 2014 15:45:29 -0700
Subject: [PATCH] GUAC-761: Store API version. Perform sanity checks within
 webapp.

---
 .../src/main/webapp/modules/Version.js        | 33 +++++++++++++++++++
 guacamole/src/main/webapp/client.xhtml        | 11 +++++--
 2 files changed, 41 insertions(+), 3 deletions(-)
 create mode 100644 guacamole-common-js/src/main/webapp/modules/Version.js

diff --git a/guacamole-common-js/src/main/webapp/modules/Version.js b/guacamole-common-js/src/main/webapp/modules/Version.js
new file mode 100644
index 000000000..8d9183294
--- /dev/null
+++ b/guacamole-common-js/src/main/webapp/modules/Version.js
@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2013 Glyptodon LLC
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+var Guacamole = Guacamole || {};
+
+/**
+ * The unique ID of this version of the Guacamole JavaScript API. This ID will
+ * be the version string of the guacamole-common-js Maven project, and can be
+ * used in downstream applications as a sanity check that the proper version
+ * of the APIs is being used (in case an older version is cached, for example).
+ *
+ * @type String
+ */
+Guacamole.API_VERSION = "0.9.1";
diff --git a/guacamole/src/main/webapp/client.xhtml b/guacamole/src/main/webapp/client.xhtml
index cade3dde5..0264e68aa 100644
--- a/guacamole/src/main/webapp/client.xhtml
+++ b/guacamole/src/main/webapp/client.xhtml
@@ -155,11 +155,16 @@
         <!-- Init -->
         <script type="text/javascript"> /* <![CDATA[ */
 
+            // Sanity check Guacamole JavaScript API version
+            if (Guacamole.API_VERSION !== "0.9.1")
+                GuacUI.Client.showStatus("Clear Your Cache", "An older version of Guacamole has been cached by your browser. Please clear your browser's cache and try again.");
+
             // Start connect after control returns from onload (allow browser
             // to consider the page loaded).
-            window.onload = function() {
-                window.setTimeout(GuacUI.Client.connect, 10);
-            };
+            else
+                window.onload = function() {
+                    window.setTimeout(GuacUI.Client.connect, 10);
+                };
 
         /* ]]> */ </script>