From 4a4ba954edb407f0d96073440be5c1834b21a342 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Petr=20Mr=C3=A1zek?= <peterix@gmail.com>
Date: Fri, 14 Dec 2018 02:48:55 +0100
Subject: [PATCH] GH-2488 fix Qt's relative URL redirect problems some more

---
 api/logic/net/Download.cpp | 18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)

diff --git a/api/logic/net/Download.cpp b/api/logic/net/Download.cpp
index fc634e3d..ccdc2c7d 100644
--- a/api/logic/net/Download.cpp
+++ b/api/logic/net/Download.cpp
@@ -167,14 +167,24 @@ bool Download::handleRedirect()
         }
         QString redirectStr = QString::fromUtf8(redirectBA);
 
-        /*
-         * IF the URL begins with //, we need to insert the URL scheme.
-         * See: https://bugreports.qt-project.org/browse/QTBUG-41061
-         */
         if(redirectStr.startsWith("//"))
         {
+            /*
+             * IF the URL begins with //, we need to insert the URL scheme.
+             * See: https://bugreports.qt.io/browse/QTBUG-41061
+             * See: http://tools.ietf.org/html/rfc3986#section-4.2
+             */
             redirectStr = m_reply->url().scheme() + ":" + redirectStr;
         }
+        else if(redirectStr.startsWith("/"))
+        {
+            /*
+             * IF the URL begins with /, we need to process it as a relative URL
+             */
+            auto url = m_reply->url();
+            url.setPath(redirectStr, QUrl::TolerantMode);
+            redirectStr = url.toString();
+        }
 
         /*
          * Next, make sure the URL is parsed in tolerant mode. Qt doesn't parse the location header in tolerant mode, which causes issues.