From bd927863fe90c2967781ae31334a636452794b1c Mon Sep 17 00:00:00 2001
From: Marcel Huber <marcelhuberfoo@gmail.com>
Date: Fri, 24 Feb 2017 10:24:51 +0100
Subject: [PATCH] Use x-forwarded-proto as scheme value if available

allows transparent usage behind reverse proxy
---
 src/main/webapp/index.jsp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/main/webapp/index.jsp b/src/main/webapp/index.jsp
index da54fb8..f1f023d 100644
--- a/src/main/webapp/index.jsp
+++ b/src/main/webapp/index.jsp
@@ -7,7 +7,8 @@
         (pageContext.request.scheme == 'https' && pageContext.request.serverPort != 443) }">
     <c:set var="port" value=":${pageContext.request.serverPort}" />
 </c:if>
-<c:set var="hostpath" value="${pageContext.request.scheme}://${pageContext.request.serverName}${port}${contextroot}" />
+<c:set var="scheme" value="${(not empty header['x-forwarded-proto']) ? header['x-forwarded-proto'] : pageContext.request.scheme}" />
+<c:set var="hostpath" value="${scheme}://${pageContext.request.serverName}${port}${contextroot}" />
 <c:if test="${!empty encoded}">
     <c:set var="imgurl" value="${hostpath}/png/${encoded}" />
     <c:set var="svgurl" value="${hostpath}/svg/${encoded}" />