--- loncom/auth/lonauth.pm	2010/08/12 21:31:10	1.101.8.2
+++ loncom/auth/lonauth.pm	2010/08/25 16:34:32	1.109
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # User Authentication Module
 #
-# $Id: lonauth.pm,v 1.101.8.2 2010/08/12 21:31:10 raeburn Exp $
+# $Id: lonauth.pm,v 1.109 2010/08/25 16:34:32 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -40,6 +40,7 @@ use Apache::lonmenu();
 use Apache::createaccount;
 use Fcntl qw(:flock);
 use Apache::lonlocal;
+use Apache::File ();
 use HTML::Entities;
  
 # ------------------------------------------------------------ Successful login
@@ -111,23 +112,16 @@ sub success {
         }
     }
 
-    my $windowinfo=&Apache::lonmenu::open($env{'browser.os'});
-    my $startupremote=&Apache::lonmenu::startupremote($destination);
-    my $remoteinfo=&Apache::lonmenu::load_remote_msg($lowerurl);
-    my $setflags=&Apache::lonmenu::setflags();
-    my $maincall=&Apache::lonmenu::maincall();
+    my $windowinfo = Apache::lonhtmlcommon::scripttag('self.name="loncapaclient";');
+    my $header = '<meta HTTP-EQUIV="Refresh" CONTENT="0; url='.$destination.'" />';
     my $brcrum = [{'href' => '',
                    'text' => 'Successful Login'},];
     my $start_page=&Apache::loncommon::start_page('Successful Login',
-                                                  $startupremote,
-                                                  {'no_inline_link' => 1,
-                                                   'bread_crumbs' => $brcrum,});
+                                                  $header,
+                                                  {'bread_crumbs' => $brcrum,});
     my $end_page  =&Apache::loncommon::end_page();
 
-    my $continuelink;
-    if ($env{'environment.remote'} eq 'off') {
-	$continuelink='<a href="'.$destination.'">'.&mt('Continue').'</a>';
-    }
+	my $continuelink='<a href="'.$destination.'">'.&mt('Continue').'</a>';
 # ------------------------------------------------- Output for successful login
 
     &Apache::loncommon::content_type($r,'text/html');
@@ -142,13 +136,10 @@ sub success {
 				       );
     $r->print(<<ENDSUCCESS);
 $start_page
-$setflags
 $windowinfo
 <h1>$lt{'wel'}</h1>
 $lt{'mes'}<p>
 <a href="/adm/$lt{'log'}">$lt{'pro'}</a></p>
-$remoteinfo
-$maincall
 $continuelink
 $end_page
 ENDSUCCESS
@@ -158,8 +149,7 @@ ENDSUCCESS
 
 sub failed {
     my ($r,$message,$form) = @_;
-    my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef,
-						    {'no_inline_link' => 1,});
+    my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef);
     my $retry = '/adm/login?username='.$form->{'uname'}.
                 '&domain='.$form->{'udom'};
     if (exists($form->{role})) {
@@ -216,12 +206,12 @@ sub handler {
         } else {
 # Indeed, a valid token is found
             &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
-            &Apache::loncommon::content_type($r,'text/html');
-            $r->send_http_header;
-            my $start_page =
-                &Apache::loncommon::start_page('Already logged in');
-            my $end_page =
-                &Apache::loncommon::end_page();
+	    &Apache::loncommon::content_type($r,'text/html');
+	    $r->send_http_header;
+	    my $start_page = 
+	        &Apache::loncommon::start_page('Already logged in');
+	    my $end_page = 
+	        &Apache::loncommon::end_page();
             my $dest = '/adm/roles';
             if ($env{'form.firsturl'} ne '') {
                 $dest = $env{'form.firsturl'};
@@ -364,8 +354,7 @@ sub handler {
             my $domdesc = &Apache::lonnet::domain($form{'udom'},'description');
             &check_can_host($r,\%form,'no_account_on_host',$domdesc);
             my $start_page = 
-                &Apache::loncommon::start_page('Create a user account in LON-CAPA',
-                                               '',{'no_inline_link'   => 1,});
+                &Apache::loncommon::start_page('Create a user account in LON-CAPA');
             my $lonhost = $r->dir_config('lonHostID');
             my $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'};
             my $contacts = 
@@ -421,10 +410,32 @@ sub handler {
 	&success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
 		 \%form);
         my ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
-	$r->internal_redirect('/adm/switchserver?otherserver='.$otherserver);
+	$r->internal_redirect('/adm/switchserver?otherserver='.$otherserver.'&origurl='.$firsturl);
     } else {
-	&success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef,
-		 \%form);
+# ------------------------------------------------------- Do the load balancing
+
+# ---------------------------------------------------------- Determine own load
+        my $loadlim = $r->dir_config('lonLoadLim');
+        my $loadavg;
+        {
+            my $loadfile=Apache::File->new('/proc/loadavg');
+            $loadavg=<$loadfile>;
+        }
+        $loadavg =~ s/\s.*//g;
+        my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);
+        my $userloadpercent=&Apache::lonnet::userload();
+
+# ---------------------------------------------------------- Are we overloaded?
+        if ((($userloadpercent>100.0)||($loadpercent>100.0))) {
+            my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent,1,$form{'udom'});
+            if ($unloaded) {
+                &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',
+                         undef,\%form);
+                $r->internal_redirect('/adm/switchserver?otherserver='.$unloaded.'&origurl='.$firsturl);
+            }
+        }
+        &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef,
+                 \%form);
     }
     return OK;
 }
@@ -435,7 +446,11 @@ sub check_can_host {
     my $canhost = 1;
     my $lonhost = $r->dir_config('lonHostID');
     my $udom = $form->{'udom'};
-    my @intdoms = &Apache::lonnet::get_internet_names($lonhost);
+    my @intdoms;
+    my $internet_names = &Apache::lonnet::get_internet_names($lonhost);
+    if (ref($internet_names) eq 'ARRAY') {
+        @intdoms = @{$internet_names};
+    }
     my $uprimary_id = &Apache::lonnet::domain($udom,'primary');
     my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
     unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {