--- loncom/interface/lonsyllabus.pm	2021/04/29 17:45:22	1.149
+++ loncom/interface/lonsyllabus.pm	2022/09/18 22:33:45	1.151
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # Syllabus
 #
-# $Id: lonsyllabus.pm,v 1.149 2021/04/29 17:45:22 raeburn Exp $
+# $Id: lonsyllabus.pm,v 1.151 2022/09/18 22:33:45 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -314,10 +314,8 @@ sub handler {
     if ($allowed) {
 #---------------------------------- Print External URL Syllabus Info if editing
         if ($target ne 'tex') {
-            my $hostname = &Apache::lonnet::hostname($homeserver);
-            my $protocol = $Apache::lonnet::protocol{$homeserver};
-            $protocol = 'http' if ($protocol ne 'https');
-            my $link = $protocol.'://'.$hostname.$r->uri;
+            my $link = &Apache::lonnet::url_prefix($r,$cdom,$homeserver,'web').
+                       $r->uri;
             $r->print('<div class="LC_left_float">'
                      .'<span class="LC_help_open_topic LC_info">'
                      .'<span class="LC_info">'
@@ -326,7 +324,7 @@ sub handler {
                      .'</span>'
                      .'</div><div style="padding:0;clear:both;margin:0;border:0"></div>'."\n");
             my $lonhost = $r->dir_config('lonHostID');
-            $r->print(&chooser($external,$uploaded,$minimal,$cdom,$cnum,$lonhost,
+            $r->print(&chooser($r,$external,$uploaded,$minimal,$cdom,$cnum,$lonhost,
                                \%syllabusfields,\%syllabus));
         }
     } else {
@@ -789,7 +787,7 @@ sub get_breadcrumbs{
 }
 
 sub chooser {
-    my ($external,$uploaded,$minimal,$cdom,$cnum,$lonhost,$fields,$values) = @_;
+    my ($r,$external,$uploaded,$minimal,$cdom,$cnum,$lonhost,$fields,$values) = @_;
     my %lt = &Apache::lonlocal::texthash(
                  'type'          => 'Syllabus Type',
                  'url'           => 'External URL',
@@ -854,7 +852,7 @@ sub chooser {
                '<div id="minimal" class="LC_left_float" style="display: '.$display{'minimal'}.'">'."\n".
                '<fieldset><legend>'.$lt{'minimal'}.'</legend>';
     if ($minimal) {
-        my ($absurl,$filename,$depbutton) = &syllabus_file_info($minimal,$cnum,$cdom,$lonhost,'minimal');
+        my ($absurl,$filename,$depbutton) = &syllabus_file_info($r,$minimal,$cnum,$cdom,$lonhost,'minimal');
         $output .= '<a href="javascript:extUrlPreview('."'currminimal'".');">'.$lt{'pr'}.'</a>'.
                    '<input type="hidden" name="minimalfile" value="'.&HTML::Entities::encode($absurl).'?inhibitmenu=yes" id="currminimal" />'.
                    $depbutton;
@@ -867,7 +865,7 @@ sub chooser {
                '<div id="file" class="LC_left_float" style="display: '.$display{'file'}.'">'."\n".
                '<fieldset><legend>'.$lt{'file'}.'</legend>';
     if ($uploaded) {
-        my ($absurl,$filename,$depbutton) = &syllabus_file_info($uploaded,$cnum,$cdom,$lonhost,'file');
+        my ($absurl,$filename,$depbutton) = &syllabus_file_info($r,$uploaded,$cnum,$cdom,$lonhost,'file');
         $output .= '<span class="LC_nobreak">'.$lt{'curr'}.'&nbsp;'.
                    '<input type="hidden" name="uploadedfile" value="'.&HTML::Entities::encode($absurl).'?inhibitmenu=yes" id="currfile" />'.
                    '<a href="javascript:extUrlPreview('."'currfile'".');">'.$filename.'</a></span>'.$depbutton.
@@ -902,10 +900,12 @@ sub chooser {
 }
 
 sub syllabus_file_info {
-    my ($item,$cnum,$cdom,$lonhost,$context) = @_;
+    my ($r,$item,$cnum,$cdom,$lonhost,$context) = @_;
     my $hostname = &Apache::lonnet::hostname($lonhost);
     my $protocol = $Apache::lonnet::protocol{$lonhost};
     $protocol = 'http' if ($protocol ne 'https');
+    my $alias = &Apache::lonnet::use_proxy_alias($r,$lonhost);
+    $hostname = $alias if ($alias ne '');
     my $absurl = $protocol.'://'.$hostname.$item;
     my ($filename) = ($item =~ m{([^/]+)$});
     my $file=&Apache::lonnet::filelocation("",$item);