diff --git a/web/upload/UploadHandler.php b/web/upload/UploadHandler.php
index b77749ab..15adb406 100755
--- a/web/upload/UploadHandler.php
+++ b/web/upload/UploadHandler.php
@@ -2,7 +2,8 @@
 
 //session_start();
 
-$hostname = exec('hostname');
+$host_arr=explode(":", $_SERVER['HTTP_HOST']);
+$hostname=$host_arr[0];
 $port = $_SERVER['SERVER_PORT'];
 $expected_http_origin="https://".$hostname.":".$port;
 if ($_SERVER['HTTP_ORIGIN'] != $expected_http_origin) {