X-Git-Url: https://dev.renevier.net/gitweb.cgi?p=syp.git;a=blobdiff_plain;f=news.php;h=6eb78e63efe9e10ff3258fb9c7f3407d4b8b59bb;hp=b729bb7f046f955844ea7100302214d29f8b406b;hb=41c341624c16607ac710aac446cc0ead3c53671b;hpb=9acc365249b5e630da6b5cdd23e3a8015f39ddc7

diff --git a/news.php b/news.php
index b729bb7..6eb78e6 100644
--- a/news.php
+++ b/news.php
@@ -6,8 +6,20 @@ require_once ("./inc/settings.php");
 require_once ("./inc/db/mysql.php");
 require_once ("./inc/utils.php");
 
-header ("Content-type: application/atom+xml; charset=UTF-8");
-header("Cache-control: no-cache");
+function headers_callback ($output) {
+    $etag = md5 ($output);
+    if ((isset ($_SERVER ["HTTP_IF_NONE_MATCH"])) && 
+         ($_SERVER ["HTTP_IF_NONE_MATCH"] == $etag)) {
+         header ("HTTP/1.1 304 Not Modified");
+         exit ();
+    }
+
+    header ("Content-type: application/atom+xml; charset=UTF-8");
+    header ("Cache-control: must-revalidate");
+    header (sprintf ("ETag: %s", $etag));
+
+    return $output;
+}
 
 function date3339 ($feature) {
     $date = date ('Y-m-d\TH:i:s', $feature->date);
@@ -118,5 +130,8 @@ try {
 } catch (Exception $e) {
     exit ("server error");
 }
+
+ob_start ("headers_callback");
 main ($features);
+ob_end_flush ()
 ?>