From c3e297e08ff1e1a60617e64bf3eace8db07c18f8 Mon Sep 17 00:00:00 2001
From: Urban Müller
Date: Fri, 26 Sep 2014 16:50:45 +0200
Subject: trigger short expire if files recently updated (may not yet be up to
 date on other slaves)

---
 itjs.class | 5 ++++-
 itjs.php   | 5 +++--
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/itjs.class b/itjs.class
index c8fe29b..f73698d 100644
--- a/itjs.class
+++ b/itjs.class
@@ -191,7 +191,10 @@ static function checksum($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")); # jquery files included by lib/jquery.js
 	$key = "itjs_" . md5(join("", it::map('"$v" . @filemtime("$v")', $filenames)));
 
-	return it_cache::get($key) ?: it_cache::put($key, substr(md5(self::filecontents($filenames, false)), 0, 10), array('ttl' => 60));
+	if (time() - max(array_map('filemtime', $filenames)) < 60)
+		return "-"; # trigger short expire, our file may not yet be up to date on other slaves
+	else
+		return it_cache::get($key) ?: it_cache::put($key, substr(md5(self::filecontents($filenames, false)), 0, 10), array('ttl' => 60));
 }
 
 function crcurl($url)
diff --git a/itjs.php b/itjs.php
index 4bcacbe..62cd474 100644
--- a/itjs.php
+++ b/itjs.php
@@ -24,7 +24,8 @@ require "itools/itools.lib";
 if (EDC('slow' . it::match('\.(\w+)$', $_SERVER['PHP_SELF'])))
 	 sleep(10);
 
-if (false && !$_SERVER['HTTP_CACHE_CONTROL'] && $_SERVER['HTTP_IF_NONE_MATCH'] && !it::is_devel() && !$_REQUEST['retry'])
+$crc = $_REQUEST['c'] ?: $_REQUEST['s'];
+if (false && $crc != "-" && !$_SERVER['HTTP_CACHE_CONTROL'] && $_SERVER['HTTP_IF_NONE_MATCH'] && !it::is_devel() && !$_REQUEST['retry'])
 {
 	header("HTTP/1.0 304 Not Modified"); # client should always keep the component that fits the page it has
 	exit;
@@ -71,7 +72,7 @@ else if (!it::match('\.html$', $file))
 
 if (it::is_live() && !$_REQUEST['retry'])
 {
-	$keeptime = /* $_REQUEST['s'] || $_REQUEST['c'] ? 86400*30 : */ 900; # long expire if checksum present DISABLED
+	$keeptime = $crc == "-" ? 0 : ($crc ? 900 : 900); # long expire if checksum present DISABLED
 	header("Cache-Control: max-age=$keeptime, 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() + $keeptime). " GMT");
 }
-- 
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