--- loncom/interface/lonexttool.pm	2025/06/14 18:51:58	1.22.2.7
+++ loncom/interface/lonexttool.pm	2025/06/06 20:36:58	1.28
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Launch External Tool Provider (LTI)
 #
-# $Id: lonexttool.pm,v 1.22.2.7 2025/06/14 18:51:58 raeburn Exp $
+# $Id: lonexttool.pm,v 1.28 2025/06/06 20:36:58 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -96,7 +96,7 @@ sub handler {
     my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
     my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
     my $chome = $env{'course.'.$env{'request.course.id'}.'.home'};
-    my ($idx,$crstool,$is_tool,%toolhash,%toolsettings,$desturl,$delay);
+    my ($idx,$crstool,$is_tool,%toolhash,%toolsettings);
 
     if ($r->uri eq "/adm/$cdom/$cnum/$marker/$exttool") {
         %toolsettings=&Apache::lonnet::dump('exttool_'.$marker,$cdom,$cnum);
@@ -131,30 +131,11 @@ sub handler {
                         }
                     }
                     unless ($gotreturnurl) {
-                        $toolhash{'returnurl'} = 'default';     
+                        $toolhash{'returnurl'} = 'default';
                     }
                 } else {
                     $toolhash{'returnurl'} = 'none';
                 }
-                if ($toolhash{'desturl'}) {
-                    if ((ref($toolhash{'crsconf'}) eq 'HASH')) {
-                        if ($toolhash{'crsconf'}{'desturl'}) {
-                            if ((exists($toolsettings{'desturl'})) &&
-                                ($toolsettings{'desturl'} =~ m{^(https?\://|/)})) {
-                                $desturl = $toolsettings{'desturl'};
-                                if ((exists($toolsettings{'delay'})) &&
-                                    ($toolsettings{'delay'} =~ /^\d+\.?\d*$/)) {
-                                    $delay = $toolsettings{'delay'};
-                                }
-                            }
-                        } elsif ($toolhash{'defdest'} =~ m{^(https?\://|/)}) {
-                            $desturl = $toolhash{'defdest'};
-                            if ($toolhash{'defdelay'} =~ /^\d+\.?\d*$/) {
-                                $delay = $toolhash{'defdelay'};
-                            }
-                        }
-                    }
-                }
                 $is_tool = 1;
             }
         }
@@ -252,31 +233,11 @@ sub handler {
             if ($toolhash{'crsappend'} ne '') {
                 $url .= $toolhash{'crsappend'};
             }
-            if ($desturl ne '') {
-                my ($scheme,$provider,$path);
-                if ($url =~ m{^https?\://}) {
-                    ($scheme,$provider,$path) = ($url =~ m{^(https?\://)([^/]+)(|/.+)$});
-                    if ($desturl =~ m{^/}) {
-                        if ($path eq $desturl) {
-                            undef($desturl);
-                        } else {
-                            $desturl = $scheme.$provider.$desturl;
-                        }
-                    } elsif ($desturl =~ m{^https?\://}) {
-                        if ($url eq $desturl) {
-                            undef($desturl);
-                        }
-                    }
-                } elsif ($url eq $desturl) {
-                    undef($desturl);
-                }
-            }
             my %info = (
                          method => $toolhash{'sigmethod'},
                        );
             $r->print(&launch_html($cdom,$cnum,$crstool,$url,$idx,
-                                   $toolhash{'cipher'},$submittext,
-                                   \%lti,\%info,$desturl,$delay));
+                                   $toolhash{'cipher'},$submittext,\%lti,\%info));
         } else {
             $r->print('<div class="LC_warning">'.&mt('External Tool Unavailable').'</div>');
         }
@@ -530,14 +491,14 @@ sub lti_params {
                 my $mapurl = &Apache::lonnet::clutter($map);
                 my $mapsymb = &Apache::lonnet::symbread($map);
                 if ((&Apache::lonnet::EXT('resource.0.encrypturl',$mapsymb) =~ /^yes$/i) &&
-                    (!$env{'request.role.adv'})) { 
+                    (!$env{'request.role.adv'})) {
                     $return_url = &Apache::lonenc::encrypted($mapurl);
                 } else {
                     $return_url = $mapurl;
                 }
                 $return_url .= '?navmap=1';
             } elsif ($env{'httpref.'.$uri} eq '/adm/coursedoc') {
-                $return_url = '/adm/supplemental';        
+                $return_url = '/adm/supplemental';
             } else {
                 $return_url = '/adm/navmaps';
             }
@@ -558,93 +519,33 @@ sub lti_params {
 }
 
 sub launch_html {
-    my ($cdom,$cnum,$crstool,$url,$idx,$keynum,$submittext,$paramsref,
-        $inforef,$desturl,$delay) = @_;
+    my ($cdom,$cnum,$crstool,$url,$idx,$keynum,$submittext,$paramsref,$inforef) = @_;
     my ($status,$hashref) =
         &Apache::lonnet::sign_lti($cdom,$cnum,$crstool,'tools','launch',$url,$idx,$keynum,
                                   $paramsref,$inforef);
     unless ($status eq 'ok') {
         return '<div class="LC_warning">'.&mt('External Tool Unavailable').'</div>';
     }
-    my ($action,$js_html,$header,$title,$bodytag,$form,$divsty,$delay_in_ms);
-    if ($delay ne '') {
-        $delay_in_ms = int(1000 * $delay);
-    }
-    $action = &HTML::Entities::encode($url,'<>&"');
-    $title = &mt('Launcher');
-    $header = <<"END";
+    my $action = &HTML::Entities::encode($url,'<>&"');
+    my $form = <<"END";
 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 <html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
-END
-    if ($desturl) {
-        $divsty = 'none';
-        if ($delay_in_ms eq '') {
-            $delay_in_ms = 1000;
-        }
-        $bodytag = <<"END";
-<body onload="setTimeout(document.LCltiLaunchForm.submit(),$delay_in_ms);">
-END
-    } else {
-        $divsty = 'block';
-        $bodytag = <<"END";
 <body>
-END
-    }
-    $form = <<"END";
-<div id="LCltiLaunch" style="display:$divsty;">
+<div id="LCltiLaunch">
 <form name="LCltiLaunchForm" id="LCltiLaunchFormId" action="$action" method="post" encType="application/x-www-form-urlencoded">
 END
     if (ref($hashref) eq 'HASH') {
         foreach my $item (keys(%{$hashref})) {
             my $type = 'hidden';
             if ($item eq 'basiclti_submit') {
-                unless ($desturl) {
-                    $type = 'submit';
-                }
+                $type = 'submit';
             }
             $form .= '<input type="'.$type.'" name="'.$item.'" value="'.$hashref->{$item}.'" id="id_'.$item.'" />'."\n";
         }
     }
     $form .= "</form></div>\n";
-    my $footer = <<"END";
-</body>
-</html>
-END
-    if ($desturl) {
-        $js_html = $header.$bodytag.$form.$footer;
-        &js_escape(\$js_html);
-        &js_escape(\$desturl);
-        return <<"END";
-$header
-<head>
-<title>$title</title>
-<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
-<meta name="google" content="notranslate" />
-</head>
-<body onload="javascript:addcontent();">
-<iframe id="LC_launcher_iframe" style="position: absolute; width:0; height:0; border:0;">
-</iframe>
+    $form .= <<"ENDJS";
 <script type="text/javascript">
-// <![CDATA[
-function addcontent() {
-    if (document.getElementById('LC_launcher_iframe')) {
-        document.getElementById('LC_launcher_iframe').src = "data:text/html;charset=utf-8," + escape("$js_html");
-    }
-    setTimeout(() => {
-        document.location.href="$desturl";
-    }, $delay_in_ms);
-}
-// ]]>
-</script>
-$footer
-END
-    } else {
-        return <<"END";
-$header
-$bodytag
-$form
-<script type="text/javascript">
-// <![CDATA[
     document.getElementById("LCltiLaunch").style.display = "none";
     nei = document.createElement('input');
     nei.setAttribute('type','hidden');
@@ -652,11 +553,10 @@ $form
     nei.setAttribute('value','$submittext');
     document.getElementById("LCltiLaunchFormId").appendChild(nei);
     document.LCltiLaunchForm.submit();
-// ]]>
-</script>
-$footer
-END
-    }
+ </script>
+ENDJS
+    $form .= "</body></html>\n";
+    return $form;
 }
 
 sub gradabletool_access_check {