--- loncom/interface/lonnavmaps.pm	2018/11/13 03:59:00	1.543
+++ loncom/interface/lonnavmaps.pm	2019/01/16 20:23:37	1.546
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Navigate Maps Handler
 #
-# $Id: lonnavmaps.pm,v 1.543 2018/11/13 03:59:00 raeburn Exp $
+# $Id: lonnavmaps.pm,v 1.546 2019/01/16 20:23:37 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -1490,10 +1490,13 @@ sub render {
         if ($args->{'iterator_map'}) {
             my $map = $args->{'iterator_map'};
             $map = $navmap->getResourceByUrl($map);
-            my $firstResource = $map->map_start();
-            my $finishResource = $map->map_finish();
-
-            $args->{'iterator'} = $it = $navmap->getIterator($firstResource, $finishResource, $filterHash, $condition);
+            if (ref($map)) {
+                my $firstResource = $map->map_start();
+                my $finishResource = $map->map_finish();
+                $args->{'iterator'} = $it = $navmap->getIterator($firstResource, $finishResource, $filterHash, $condition);
+            } else {
+                return;
+            }
         } else {
             $args->{'iterator'} = $it = $navmap->getIterator(undef, undef, $filterHash, $condition,undef,$args->{'include_top_level_map'});
         }
@@ -1933,14 +1936,20 @@ END
             if ($env{'request.course.id'}) {
                 if (($is_ssl) && ($src =~ m{^\Q/public/$cdom/$cnum/syllabus\E($|\?)}) &&
                     ($env{'course.'.$env{'request.course.id'}.'.externalsyllabus'} =~ m{^http://})) {
-                    if ($hostname ne '') {
-                        $src = 'http://'.$hostname.$src;
+                    unless (&Apache::lonnet::uses_sts()) {
+                        if ($hostname ne '') {
+                            $src = 'http://'.$hostname.$src;
+                        }
+                        $src .= ($srcHasQuestion? '&' : '?') . 'usehttp=1';
+                        $srcHasQuestion = 1;
                     }
-                    $src .= ($srcHasQuestion? '&' : '?') . 'usehttp=1';
-                    $srcHasQuestion = 1;
                 } elsif (($is_ssl) && ($src =~ m{^\Q/adm/wrapper/ext/\E(?!https:)})) {
-                    if ($hostname ne '') {
-                        $src = 'http://'.$hostname.$src;
+                    unless (&Apache::lonnet::uses_sts()) {
+                        if ($hostname ne '') {
+                            $src = 'http://'.$hostname.$src;
+                        }
+                        $src .= ($srcHasQuestion? '&' : '?') . 'usehttp=1';
+                        $srcHasQuestion = 1;
                     }
                 }
             }
@@ -2985,7 +2994,7 @@ sub recursed_crumbs {
         my $pc = $map->map_pc();
         next if ((!$pc) || ($pc == 1));
         push(@links,$map);
-        push(@revmapinfo,{'href' => $map->link().'?navmap=1','text' => $map->title(),'no_mt' => 1,});
+        push(@revmapinfo,{'href' => $env{'request.use_absolute'}.$map->link().'?navmap=1','text' => $map->title(),'no_mt' => 1,});
         $totallength += length($map->title());
     }
     my $numlinks = scalar(@links);
@@ -3000,7 +3009,7 @@ sub recursed_crumbs {
             foreach my $map (@links) {
                 my $showntitle = &truncate_crumb_text($map->title(),$avg);
                 if ($showntitle ne '') {
-                    push(@revmapinfo,{'href' => $map->link().'?navmap=1','text' => $showntitle,'no_mt' => 1,});
+                    push(@revmapinfo,{'href' => $env{'request.use_absolute'}.$map->link().'?navmap=1','text' => $showntitle,'no_mt' => 1,});
                 }
             }
         }