Auto-compress javascript assets

TODO.md

@@ -5,7 +5,6 @@
 * Add file extensions ourselves to push state
 * Proper markdown highlighting
 * Better about page text
-* auto-compress assets
 * add feedback for errors to UI - esp. too long
 
 # shared version only

config.js

@@ -9,6 +9,8 @@
 
   "staticMaxAge": 86400,
 
+  "recompressStaticAssets": true,
+
   "logging": [
     {
       "level": "verbose",

package.json

@@ -20,7 +20,8 @@
 	"dependencies": {
 		"winston": "*",
     "hashlib": "*",
-    "connect": "*"
+    "connect": "*",
+    "uglify-js": "*"
 	},
 
 	"devDependencies": {

server.js

@@ -37,6 +37,26 @@ if (!config.storage.type) {
 var Store = require('./lib/' + config.storage.type + '_document_store');
 var preferredStore = new Store(config.storage);
 
+// Compress the static javascript assets
+if (config.recompressStaticAssets) {
+  var jsp = require("uglify-js").parser;
+  var pro = require("uglify-js").uglify;
+  var list = fs.readdirSync('./static');
+  for (var i = 0; i < list.length; i++) {
+    var item = list[i];
+    var orig_code, ast;
+    if ((item.indexOf('.js') === item.length - 3) && (item.indexOf('.min.js') === -1)) {
+      dest = item.substring(0, item.length - 3) + '.min' + item.substring(item.length - 3);
+      orig_code = fs.readFileSync('./static/' + item, 'utf8');
+      ast = jsp.parse(orig_code);
+      ast = pro.ast_mangle(ast);
+      ast = pro.ast_squeeze(ast);
+      fs.writeFileSync('./static/' + dest, pro.gen_code(ast), 'utf8');
+      winston.info('compressed ' + item + ' into ' + dest);
+    }
+  }
+}
+
 // Send the static documents into the preferred store, skipping expirations
 for (var name in config.documents) {
   var path = config.documents[name];

static/index.html

@@ -9,8 +9,8 @@
 
 		<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.0/jquery.min.js"></script>
 		<script type="text/javascript" src="http://yandex.st/highlightjs/6.1/highlight.min.js"></script>
-		<script type="text/javascript" src="application.js"></script>
-		<script type="text/javascript" src="ZeroClipboard.js"></script>
+		<script type="text/javascript" src="application.min.js"></script>
+		<script type="text/javascript" src="ZeroClipboard.min.js"></script>
 
 		<meta name="robots" content="noindex,nofollow"/>