support max-age

2 files changed, 4 insertions, 1 deletions

diff --git a/it_html.class b/it_html.class
index 3834251..034d288 100644
--- a/it_html.class
+++ b/it_html.class
@@ -502,9 +502,10 @@ function head($args = array())
 
 		if ($p['js'])
 		{
+			$checksum = itjs::checksum(itjs::filenames($p['js']));
 			$js .= $this->_itjs("boot.js", "inline");
 			$js .= "function it_boot_start(){ " . trim($p['jsboot']) . " }\n";
-			$js .= "it_boot('/itjs/" . $p['js'] . "');\n";
+			$js .= "it_boot('/itjs/" . $p['js'] . "?s=$checksum');\n";
 		}
 
 		$js .= $this->_itjs($p['jsinline'], 'inline');
diff --git a/itjs.php b/itjs.php
index 3055958..5c23b4a 100644
--- a/itjs.php
+++ b/itjs.php
@@ -40,6 +40,8 @@ else if (!ereg('\.html$', $file))
 
 if ($checksum != $_SERVER['HTTP_IF_NONE_MATCH'])
 {
+	header("Cache-Control: max-age=900");
+
 	if ($_REQUEST['boot'])
 		$data = preg_replace('/([\xa0-\xff])/e', 'sprintf("\\u%04x", ord("\\1"))', $data) . "window.it_boot_init();";