Cachebusting

README.md

I created this gist so at my current work, I could pass around this patch file to get local cachebusting working for development.

cachebust.diff

diff -rupN cms/lib/utils.js /Users/lkarrys/cms/lib/utils.js
--- cms/lib/utils.js	2011-09-28 14:32:30.000000000 -0700
+++ /Users/lkarrys/cms/lib/utils.js	2011-09-28 15:31:00.000000000 -0700
@@ -1,3 +1,5 @@
+var cacheBust = getCacheBust();
+
 function fileAsString(node) {
   if (typeof(node) == "undefined" || !node.isNodeType("nt:file"))
     return false;
@@ -61,16 +63,16 @@ function registerComponent(siteRoot, jcr
   j = null;
 
   for (j in globalJsPaths) {
-    js.push(siteRoot + globalJsPaths[j]);
+    js.push(siteRoot + globalJsPaths[j] + cacheBust);
   }
   for (j in globalCssPaths) {
-    css.push(siteRoot + globalCssPaths[j]);
+    css.push(siteRoot + globalCssPaths[j] + cacheBust);
   }
   for (j in cssPaths) {
-    css.push(cssPaths[j]);
+    css.push(cssPaths[j] + cacheBust);
   }
   for (j in jsPaths) {
-    js.push(jsPaths[j]);
+    js.push(jsPaths[j] + cacheBust);
   }
   var partial = fileAsString(component.getNode("body.html"));
   Handlebars.registerPartial(component["componentId"], partial);
@@ -112,6 +114,26 @@ function mergePropertiesPrefix(ctx, pref
   return obj3;
 }
 
+function getCacheBust() {
+  var cacheBust = "",
+      cacheBustOperator = "?";
+      
+  if (isDevelopment()) {
+    cacheBust = cacheBustOperator + "cb=" + new Date().getTime();
+  }
+  
+  return cacheBust;
+}
+
+function isDevelopment() {
+  var currentUrl = request.getRequestURL().toString();
+  return (
+    currentUrl.indexOf('://localhost:80') > -1 ||
+    currentUrl.indexOf('.local:80') > -1 ||
+    /.*(172|192|10|127)\.\d{1,3}\.\d{1,3}\.\d{1,3}:80.*/.test(currentUrl)
+  );
+}
+
 function returnArrayOfChildNodes(node) {
   var retArr = [];
   for (var key in node) {
diff -rupN cms/page/html.esp /Users/lkarrys/cms/page/html.esp
--- cms/page/html.esp	2011-09-28 14:32:30.000000000 -0700
+++ /Users/lkarrys/cms/page/html.esp	2011-09-28 15:31:17.000000000 -0700
@@ -97,15 +97,15 @@
       <%}
     
       for (i in globalJsPaths) {
-        js.push(siteRoot + globalJsPaths[i]);
+        js.push(siteRoot + globalJsPaths[i] + cacheBust);
       }
       
       for (i in themeJsPaths) {
-        js.push(siteRoot + themeJsPaths[i]);
+        js.push(siteRoot + themeJsPaths[i] + cacheBust);
       }
       
       for (i in layoutJsPaths) {
-        js.push(siteRoot + layoutJsPaths[i]);
+        js.push(siteRoot + layoutJsPaths[i] + cacheBust);
       }
       
       // register components
@@ -134,15 +134,15 @@
       <%}
     
       for (i in globalCssPaths) {
-        css.push(siteRoot + globalCssPaths[i]);
+        css.push(siteRoot + globalCssPaths[i] + cacheBust);
       }
       
       for (i in layoutCssPaths) {
-        css.push(siteRoot + layoutCssPaths[i]);
+        css.push(siteRoot + layoutCssPaths[i] + cacheBust);
       }
       
       for (i in themeCssPaths) {
-        css.push(siteRoot + themeCssPaths[i]);
+        css.push(siteRoot + themeCssPaths[i] + cacheBust);
       }
       
       context = mergeProperties(context,

cachebust.sh

#!/bin/sh

curl -s -S https://raw.github.com/gist/8b105bf6a40c3e68b656/38dc8b580809bb4c866206f9c90f42ccc11b92d6/cachebust.diff > ~/__8b105bf6a40c3e68b656__.diff
cd /Volumes/localhost/apps/cms/ && patch -p1 < ~/__8b105bf6a40c3e68b656__.diff
rm -f ~/__8b105bf6a40c3e68b656__.diff