From c69d635a4d3a31fca2735428df7bf1926d883168 Mon Sep 17 00:00:00 2001
From: Urban Müller
Date: Thu, 24 Oct 2013 12:13:26 +0000
Subject: prevent proxy caching, add jquery to md5

---
 itjs.class | 7 ++++---
 itjs.php   | 2 +-
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/itjs.class b/itjs.class
index f40a380..6a2053d 100644
--- a/itjs.class
+++ b/itjs.class
@@ -157,7 +157,7 @@ static function filecontents($filenames, $execphp = true)
 	{
 		ob_start(); # Needs to capture inside loop to guarantee file order
 		if (!(it::match('W3C_CSS_Validator', $_SERVER['HTTP_USER_AGENT']) && it::match('jquery-ui\.css', $filename)))
-			$result .= it::replace(array('^1$' => ""), $execphp ? @include($filename) : file_get_contents($filename), array('utf8' => false));
+			$result .= it::replace(array('^1$' => ""), $execphp ? @include($filename) : @file_get_contents($filename), array('utf8' => false));
 		$result .= ob_get_clean();
 	}
 
@@ -190,9 +190,10 @@ static function strip($code)
  */
 static function checksum($fnlist)
 {
-	$key = "itjs_" . md5(join("", it::map('"$v" . filemtime("$v")', is_array($fnlist) ? $fnlist : itjs::filenames($fnlist))));
+	$filenames = array_merge(is_array($fnlist) ? $fnlist : itjs::filenames($fnlist), array("/www/lib.search.ch/var/jquery-ui/dist/minified/jquery.ui.core.min.js", "/www/lib.search.ch/var/jquery/dist/jquery.min.js"));
+	$key = "itjs_" . md5(join("", it::map('"$v" . filemtime("$v")', $filenames)));
 
-	return it_cache::get($key) ?: it_cache::put($key, substr(md5(self::filecontents(is_array($fnlist) ? $fnlist : itjs::filenames($fnlist), false)), 0, 8));
+	return it_cache::get($key) ?: it_cache::put($key, substr(md5(self::filecontents($filenames, false)), 0, 8));
 }
 
 }
diff --git a/itjs.php b/itjs.php
index 90c9252..de98114 100644
--- a/itjs.php
+++ b/itjs.php
@@ -62,7 +62,7 @@ else if (!it::match('\.html$', $file))
 
 if (!preg_match('/Opera/', $_SERVER['HTTP_USER_AGENT']) && it::is_live() && !$_REQUEST['retry'])
 {
-	header("Cache-Control: max-age=604800");
+	header("Cache-Control: max-age=604800, private"); # proxies should not cache since contents of same url can differ between browsers
 	header("Expires: " . gmdate("D, d M Y H:i:s", time()+604800). " GMT");
 }
 
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