--- loncom/auth/lonauth.pm	2013/08/13 13:29:09	1.121.2.4
+++ loncom/auth/lonauth.pm	2014/01/05 11:38:43	1.121.2.8
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # User Authentication Module
 #
-# $Id: lonauth.pm,v 1.121.2.4 2013/08/13 13:29:09 raeburn Exp $
+# $Id: lonauth.pm,v 1.121.2.8 2014/01/05 11:38:43 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -108,11 +108,11 @@ sub success {
             }
             $desturl = &HTML::Entities::encode($desturl,'"<>&');
             $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
-            $destination .= '&destinationurl='.$desturl.
+            $destination .= 'destinationurl='.$desturl.
                             '&destsymb='.$destsymb;
         } else {
             $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
-            $destination .= '&destinationurl='.$destsymb;
+            $destination .= 'destinationurl='.$destsymb;
         }
     }
     if ($destination =~ m{^/adm/roles}) {
@@ -171,19 +171,42 @@ ENDSUCCESS
 
 sub failed {
     my ($r,$message,$form) = @_;
-    my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef);
-    my $retry = '/adm/login?username='.$form->{'uname'}.
-                '&domain='.$form->{'udom'};
+    (undef,undef,undef,my $clientmathml,my $clientunicode) =
+        &Apache::loncommon::decode_user_agent();
+    my $args = {};
+    if ($clientunicode && !$clientmathml) {
+        $args = {'browser.unicode' => 1};
+    }
+
+    my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef,$args);
+    my $uname = &Apache::loncommon::cleanup_html($form->{'uname'});
+    my $udom = &Apache::loncommon::cleanup_html($form->{'udom'});
+    if (&Apache::lonnet::domain($udom,'description') eq '') {
+        undef($udom);
+    }
+    my $retry = '/adm/login';
+    if ($uname eq $form->{'uname'}) {
+        $retry .= '?username='.$uname;
+    }
+    if ($udom) {
+        $retry .= (($retry=~/\?/)?'&amp;':'?').'domain='.$udom;
+    }
     if (exists($form->{role})) {
-        $retry .= '&role='.$form->{role};
+        my $role = &Apache::loncommon::cleanup_html($form->{role});
+        if ($role ne '') {
+            $retry .= (($retry=~/\?/)?'&amp;':'?').'role='.$role;
+        }
     }
     if (exists($form->{symb})) {
-        $retry .= '&symb='.$form->{symb};
+        my $symb = &Apache::loncommon::cleanup_html($form->{symb});
+        if ($symb ne '') {
+            $retry .= (($retry=~/\?/)?'&amp;':'?').'symb='.$symb;
+        }
     }
-    my $end_page   = &Apache::loncommon::end_page();
+    my $end_page = &Apache::loncommon::end_page();
     &Apache::loncommon::content_type($r,'text/html');
     $r->send_http_header;
-    my $loginhelp = &loginhelpdisplay($form->{'udom'});
+    my $loginhelp = &loginhelpdisplay($udom);
     if ($loginhelp) {
         $loginhelp = '<p><a href="'.$loginhelp.'">'.&mt('Login problems?').'</a></p>';
     }
@@ -205,9 +228,9 @@ sub reroute {
     my ($r) = @_;
     &Apache::loncommon::content_type($r,'text/html');
     $r->send_http_header;
-    my $msg='<h1>'.&mt('Sorry ...').'</h1>'
+    my $msg='<b>'.&mt('Sorry ...').'</b><br />'
            .&mt('Please [_1]log in again[_2].');
-    &Apache::loncommon::simple_error_page($r,'Rerouting',$msg);
+    &Apache::loncommon::simple_error_page($r,'Rerouting',$msg,{'no_auto_mt_msg' => 1});
 }
 
 # ---------------------------------------------------------------- Main handler
@@ -269,7 +292,7 @@ sub handler {
        $value =~ tr/+/ /;
        $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
        $form{$name}=$value;
-    } 
+    }
 
     if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) {
 	&failed($r,'Username, password and domain need to be specified.',
@@ -294,6 +317,12 @@ sub handler {
     my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'},
                                       $form{'serverid'});
 
+    my %sessiondata;
+    if ($form{'iptoken'}) {
+        %sessiondata = &Apache::lonnet::tmpget($form{'iptoken'});
+        my $delete = &Apache::lonnet::tmpdel($form{'token'});
+    }
+
     if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') || 
         ($tmpinfo eq 'no_such_host')) {
 	&failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form);
@@ -407,6 +436,15 @@ sub handler {
 	($firsturl=~/^\/adm\/(logout|remote)/)) {
 	$firsturl='/adm/roles';
     }
+
+    my $hosthere;
+    if ($form{'iptoken'}) {
+        if (($sessiondata{'domain'} eq $form{'udom'}) &&
+            ($sessiondata{'username'} eq $form{'uname'})) {
+            $hosthere = 1;
+        }
+    }
+
 # --------------------------------- Are we attempting to login as somebody else?
     if ($form{'suname'}) {
 # ------------ see if the original user has enough privileges to pull this stunt
@@ -430,8 +468,12 @@ sub handler {
 	}
     }
 
-    my ($is_balancer,$otherserver) = 
-        &Apache::lonnet::check_loadbalancing($form{'uname'},$form{'udom'});
+    my ($is_balancer,$otherserver);
+
+    unless ($hosthere) {
+        ($is_balancer,$otherserver) =
+            &Apache::lonnet::check_loadbalancing($form{'uname'},$form{'udom'});
+    }
 
     if ($is_balancer) {
         if (!$otherserver) { 
@@ -440,7 +482,17 @@ sub handler {
         if ($otherserver) {
             &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
                      \%form);
-	    $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver.'&origurl='.$firsturl);
+            my $switchto = '/adm/switchserver?otherserver='.$otherserver;
+            if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) {
+                $switchto .= '&origurl='.$firsturl;
+            }
+            if ($form{'role'}) {
+                $switchto .= '&role='.$form{'role'};
+            }
+            if ($form{'symb'}) {
+                $switchto .= '&symb='.$form{'symb'};
+            }
+            $r->internal_redirect($switchto);
         } else {
             $r->print(&noswitch());
         }
@@ -451,7 +503,17 @@ sub handler {
             if ($otherserver) {
                 &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
                          \%form);
-                $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver.'&origurl='.$firsturl);
+                my $switchto = '/adm/switchserver?otherserver='.$otherserver;
+                if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) {
+                    $switchto .= '&origurl='.$firsturl;
+                }
+                if ($form{'role'}) {
+                    $switchto .= '&role='.$form{'role'};
+                }
+                if ($form{'symb'}) {
+                    $switchto .= '&symb='.$form{'symb'};
+                }
+                $r->internal_redirect($switchto);
             } else {
                 $r->print(&noswitch());
             }