From b1422e1053164b8b6109d8dbb295af0ac865c2ab Mon Sep 17 00:00:00 2001
From: Christian Wiedemann <christian.wiedemann@key-tec.de>
Date: Tue, 12 Mar 2019 00:07:15 +0100
Subject: [PATCH] Cache HTTP/HTTPS separate.

Right now varnish caches either HTTP or HTTPS pages. This  can lead to unexpected behavior, especially with Apache .htaccess HTTP to HTTPS redirect rules.  (Redirect loops). Think it makes to hash them based on X-Forwarded-Proto.
---
 conf/default.vcl.tmpl | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/conf/default.vcl.tmpl b/conf/default.vcl.tmpl
index 868c2b0..5df3745 100644
--- a/conf/default.vcl.tmpl
+++ b/conf/default.vcl.tmpl
@@ -172,3 +172,10 @@ sub vcl_synth {
 "} );
   return (deliver);
 }
+
+# Cache HTTP and HTTPS separate.
+sub vcl_hash {
+  if (req.http.X-Forwarded-Proto) {
+    hash_data(req.http.X-Forwarded-Proto);
+  }
+}