From dd5b1b2bcdab244e537daf136bf7a9ccb23f6c14 Mon Sep 17 00:00:00 2001
From: Ylian Saint-Hilaire <ysainthilaire@hotmail.com>
Date: Fri, 1 Jul 2022 01:18:18 -0700
Subject: [PATCH] Fixed server exception in web relay when websocket fails to
 connect, #4172.

---
 apprelays.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/apprelays.js b/apprelays.js
index 68535e9e..aa6e7bb2 100644
--- a/apprelays.js
+++ b/apprelays.js
@@ -638,7 +638,7 @@ module.exports.CreateWebRelay = function (parent, db, args, domain) {
             }
         } else {
             // Tunnel is now in web socket pass-thru mode
-            if (header.connection.toLowerCase() == 'upgrade') {
+            if ((typeof header.connection == 'string') && (header.connection.toLowerCase() == 'upgrade')) {
                 // Websocket upgrade succesful
                 obj.socketParseState = 2;
             } else {