--- loncom/auth/lonshibauth.pm	2013/01/04 01:37:02	1.2
+++ loncom/auth/lonshibauth.pm	2015/05/17 17:34:43	1.3
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # Redirect Shibboleth authentication to designated URL (/adm/sso).
 #
-# $Id: lonshibauth.pm,v 1.2 2013/01/04 01:37:02 raeburn Exp $
+# $Id: lonshibauth.pm,v 1.3 2015/05/17 17:34:43 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -67,6 +67,7 @@ package Apache::lonshibauth;
 
 use strict;
 use lib '/home/httpd/lib/perl/';
+use Apache::lonnet;
 use Apache::Constants qw(:common REDIRECT);
 use LONCAPA qw(:DEFAULT);
 
@@ -74,7 +75,12 @@ sub handler {
     my $r = shift;
     my $target = '/adm/sso';
     if (($r->user eq '') && ($r->uri() ne $target)) {
-        my $dest = &Apache::lonnet::absolute_url($r->hostname()).$target;
+        my $lonhost = $Apache::lonnet::perlvar{'lonHostID'};
+        my $hostname = &Apache::lonnet::hostname($lonhost);
+        if (!$hostname) { $hostname = $r->hostname(); }
+        my $protocol = $Apache::lonnet::protocol{$lonhost};
+        unless ($protocol eq 'https') { $protocol = 'http'; }
+        my $dest = $protocol.'://'.$hostname.$target;
         $r->subprocess_env;
         if ($ENV{'QUERY_STRING'} ne '') {
             $dest .= '?'.$ENV{'QUERY_STRING'};