From f835f332703c2229b68c6778443a0fa76ff3e3d8 Mon Sep 17 00:00:00 2001
From: Arthur Schiwon <blizzz@arthur-schiwon.de>
Date: Wed, 26 Aug 2020 12:01:36 +0200
Subject: [PATCH] detect HTTPS from proxies

Signed-off-by: Arthur Schiwon <blizzz@arthur-schiwon.de>
---
 proxy.php | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/proxy.php b/proxy.php
index 11f20be..33f32f6 100644
--- a/proxy.php
+++ b/proxy.php
@@ -237,7 +237,10 @@ function getallheaders()
     exit();
 }
 // URL into this server of the proxy script.
-if (isset($_SERVER['HTTPS'])) {
+if ((isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off')
+	|| (isset($_SERVER['HTTP_X_FORWARDED_PROTO']) && $_SERVER['HTTP_X_FORWARDED_PROTO'] === 'https' )
+	|| (isset($_SERVER['HTTP_X_FORWARDED_SSL']) && $_SERVER['HTTP_X_FORWARDED_SSL'] === 'on')
+) {
     $proxyURL = "https://";
 } else {
     $proxyURL = "http://";