From 2f2c2d59100a347b67ee9d7da43dfae4a4ea36cf Mon Sep 17 00:00:00 2001
From: joyqi <magike.net@gmail.com>
Date: Thu, 30 Mar 2017 15:09:28 +0800
Subject: [PATCH] fix #552

---
 admin/js/pagedown.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/admin/js/pagedown.js b/admin/js/pagedown.js
index 6f10168a..f085edbc 100644
--- a/admin/js/pagedown.js
+++ b/admin/js/pagedown.js
@@ -2877,7 +2877,9 @@ else
             else {
                 // Fixes common pasting errors.
                 text = text.replace(/^http:\/\/(https?|ftp):\/\//, '$1://');
-                if (!/^(?:https?|ftp):\/\//.test(text))
+
+                // fix issue #552
+                if (!/^(?:https?|ftp):\/\//.test(text) && !/^[_a-z0-9-]+:/i.test(text))
                     text = 'http://' + text;
             }