--- a/FileCacheSet.inc	Fri Oct 19 01:36:22 2012 +0200
+++ b/FileCacheSet.inc	Sun Sep 14 21:11:27 2014 +0200
@@ -5,10 +5,23 @@
 $cache = ScriptIncludeCache::instance(__FILE__);
 $cache->cache_time("${baseDir}/Logger.inc");
 
+class Cache {
+  private $max_age=0;
+  function setMaxAge($seconds)
+  {
+    $this->max_age=$seconds;
+  }
+
+  function cacheControl() {
+    return array("expires" => toGMTime(time()+$this->max_age), "cache-control" => "public, max-age=$this->max_age");
+  }
+
+};
+
 /**
  * Caches a set of file with timestamps
  */
-class FileCacheSet {
+class FileCacheSet extends Cache {
   private $newest = 0;
   private $files = array();
   private $parentCaches = array();