From 9d19777234054d92e336027d89fe529aa6291a3c Mon Sep 17 00:00:00 2001
From: David Mudrak <david@moodle.com>
Date: Sat, 12 May 2012 16:20:40 +0200
Subject: [PATCH] MDL-31901 draftfile.php supports the preview parameter

---
 draftfile.php | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/draftfile.php b/draftfile.php
index baeceaf7af762..ede5706913491 100644
--- a/draftfile.php
+++ b/draftfile.php
@@ -36,6 +36,7 @@
 }
 
 $relativepath = get_file_argument();
+$preview = optional_param('preview', null, PARAM_ALPHANUM);
 
 // relative path must start with '/'
 if (!$relativepath) {
@@ -84,4 +85,4 @@
 // finally send the file
 // ========================================
 session_get_instance()->write_close(); // unlock session during fileserving
-send_stored_file($file, 0, false, true); // force download - security first!
+send_stored_file($file, 0, false, true, array('preview' => $preview)); // force download - security first!