From dbea8baaff1c84a8bb833fa5e1a4c9d0fb6a4c91 Mon Sep 17 00:00:00 2001
From: Christian Grothoff <christian@grothoff.org>
Date: Wed, 21 Aug 2019 18:28:26 +0200
Subject: detect plain http server

---
 src/util/util.c | 25 ++++++++++++++++++++++++-
 1 file changed, 24 insertions(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/util/util.c b/src/util/util.c
index 51726290f..eea4c91aa 100644
--- a/src/util/util.c
+++ b/src/util/util.c
@@ -431,10 +431,33 @@ TALER_url_absolute_mhd (struct MHD_Connection *connection,
   const char *prefix;
   va_list args;
   char *result;
-
+  
+  
   if (NULL != forwarded_proto)
+  {
     proto = forwarded_proto;
+  }
+  else
+  {
+    /* likely not reverse proxy, figure out if we are 
+       http by asking MHD */
+    const union MHD_ConnectionInfo *ci;
 
+    ci = MHD_get_connection_info (connection,
+                                  MHD_CONNECTION_INFO_DAEMON);
+    if (NULL != ci)
+    {
+      const union MHD_DaemonInfo *di;
+
+      di = MHD_get_daemon_info (ci->daemon,
+                                MHD_DAEMON_INFO_FLAGS);
+      if (NULL != di)
+      {
+        if (0 == (di->flags & MHD_USE_TLS))
+          proto = "http";
+      }
+    }
+  }
   host = MHD_lookup_connection_value (connection, MHD_HEADER_KIND, "Host");
   forwarded_host = MHD_lookup_connection_value (connection, MHD_HEADER_KIND, "X-Forwarded-Host");
 
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