--- loncom/interface/londocs.pm	2018/07/04 13:55:27	1.656
+++ loncom/interface/londocs.pm	2018/12/30 19:47:02	1.659
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # Documents
 #
-# $Id: londocs.pm,v 1.656 2018/07/04 13:55:27 raeburn Exp $
+# $Id: londocs.pm,v 1.659 2018/12/30 19:47:02 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -4171,7 +4171,9 @@ END
             } elsif ($url eq "/public/$coursedom/$coursenum/syllabus") {
                 if (($ENV{'SERVER_PORT'} == 443) &&
                     ($env{'course.'.$env{'request.course.id'}.'.externalsyllabus'} =~ m{^http://})) {
-                    $url .= '?usehttp=1';
+                    unless (&Apache::lonnet::uses_sts()) {
+                        $url .= '?usehttp=1';
+                    }
                     $nomodal = 1;
                 }
             }
@@ -4181,9 +4183,8 @@ END
                     if ($url =~ /^([^#]+)#([^#]+)$/) {
                         $url = $1;
                         $anchor = $2;
-                        if ($symb =~ m{^([^#]+)\Q#$anchor\E$}) {
-                            $shownsymb = $1.&escape('#').$anchor;
-                        }
+                        my $escan = &escape('#');
+                        $shownsymb =~ s/^([^\#]+)#([^\#]+)$/$1$escan$2/;
                     }
                 }
                 unless ($env{'request.role.adv'}) {
@@ -4237,8 +4238,11 @@ END
                 $url = $1;
                 $anchor = $2;
                 if (($url =~ m{^(|/adm/wrapper)/ext/(?!https:)}) && ($ENV{'SERVER_PORT'} == 443)) {
-                    if ($hostname ne '') {
-                        $url = 'http://'.$hostname.$url;
+                    unless (&Apache::lonnet::uses_sts()) {
+                        if ($hostname ne '') {
+                            $url = 'http://'.$hostname.$url;
+                        }
+                        $url .= (($url =~ /\?/) ? '&':'?').'usehttp=1';
                     }
                     $nomodal = 1;
                 }
@@ -4246,10 +4250,12 @@ END
         } elsif ($url =~ m{^\Q/public/$coursedom/$coursenum/syllabus\E}) {
             if (($ENV{'SERVER_PORT'} == 443) &&
                 ($env{'course.'.$env{'request.course.id'}.'.externalsyllabus'} =~ m{^http://})) {
-                if ($hostname ne '') {
-                    $url = 'http://'.$hostname.$url;
+                unless (&Apache::lonnet::uses_sts()) {
+                    if ($hostname ne '') {
+                        $url = 'http://'.$hostname.$url;
+                    }
+                    $url .= (($url =~ /\?/) ? '&':'?').'usehttp=1';
                 }
-                $url .= (($url =~ /\?/) ? '&':'?').'usehttp=1';
                 $nomodal = 1;
             }
         }
@@ -4430,8 +4436,7 @@ $form_end;
        } else {
            $link = $url;
        }
-       $link = &js_escape($link.(($url=~/\?/)?'&':'?').'inhibitmenu=yes'.
-                                               (($anchor ne '')?$anchor:''));
+       $link = &js_escape($link.(($url=~/\?/)?'&':'?').'inhibitmenu=yes'.$anchor);
        if ($nomodal) {
            $line.='<a href="#" onclick="javascript:window.open('."'$link','syllabuspreview','height=400,width=500,scrollbars=1,resizable=1,menubar=0,location=1')".'; return false;" />'.
                   '<img src="'.$icon.'" alt="" class="LC_icon" border="0" /></a>';
@@ -7272,14 +7277,21 @@ sub editing_js {
                 if ($backtourl =~ m{^\Q/public/$coursedom/$coursenum/syllabus\E}) {
                     if (($ENV{'SERVER_PORT'} == 443) &&
                         ($env{'course.'.$env{'request.course.id'}.'.externalsyllabus'} =~ m{^http://})) {
-                        if ($hostname ne '') {
-                            $backtourl = 'http://'.$hostname.$backtourl;
+                        unless (&Apache::lonnet::uses_sts()) {
+                            if ($hostname ne '') {
+                                $backtourl = 'http://'.$hostname.$backtourl;
+                            }
+                            $backtourl .= (($backtourl =~ /\?/) ? '&amp;':'?').'usehttp=1';
                         }
-                        $backtourl .= (($backtourl =~ /\?/) ? '&amp;':'?').'usehttp=1';
                     }
                 } elsif ($backtourl =~ m{^/adm/wrapper/ext/(?!https:)}) {
                     if (($ENV{'SERVER_PORT'} == 443) && ($hostname ne '')) {
-                        $backtourl = 'http://'.$hostname.$backtourl;
+                        unless (&Apache::lonnet::uses_sts()) {
+                            if ($hostname ne '') {
+                                $backtourl = 'http://'.$hostname.$backtourl;
+                            }
+                            $backtourl .= (($backtourl =~ /\?/) ? '&amp;':'?').'usehttp=1';
+                        }
                     }
                 }
                 if ($anchor ne '') {