diff options
| -rw-r--r-- | mod/groups/icon.php | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/mod/groups/icon.php b/mod/groups/icon.php index f4c0f8010..607f38939 100644 --- a/mod/groups/icon.php +++ b/mod/groups/icon.php @@ -10,6 +10,13 @@ require_once(dirname(dirname(dirname(__FILE__))) . "/engine/start.php"); $group_guid = get_input('group_guid'); $group = get_entity($group_guid); +// If is the same eTag, content didn't changed. +$eTag = $group->icontime . $group_guid; +if (trim($_SERVER['HTTP_IF_NONE_MATCH']) == $eTag) { + header("HTTP/1.1 304 Not Modified"); + exit; +} + $size = strtolower(get_input('size')); if (!in_array($size,array('large','medium','small','tiny','master','topbar'))) $size = "medium"; @@ -37,4 +44,5 @@ header('Expires: ' . date('r',time() + 864000)); header("Pragma: public"); header("Cache-Control: public"); header("Content-Length: " . strlen($contents)); +header("ETag: $eTag"); echo $contents; |