--- loncom/auth/lonauth.pm	2011/02/24 23:37:50	1.111
+++ loncom/auth/lonauth.pm	2011/08/17 03:52:36	1.118
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # User Authentication Module
 #
-# $Id: lonauth.pm,v 1.111 2011/02/24 23:37:50 raeburn Exp $
+# $Id: lonauth.pm,v 1.118 2011/08/17 03:52:36 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -138,15 +138,15 @@ sub success {
 
     my %lt=&Apache::lonlocal::texthash(
 				       'wel' => 'Welcome',
-				       'mes' => 'Welcome to the Learning<i>Online</i> Network with CAPA. Please wait while your session is being set up.',
 				       'pro' => 'Login problems?',
 				       'log' => 'loginproblems.html',
 				       );
+    my $welcome = &mt('Welcome to the Learning[_1]Online[_2] Network with CAPA. Please wait while your session is being set up.','<i>','</i>'); 
     $r->print(<<ENDSUCCESS);
 $start_page
 $windowinfo
 <h1>$lt{'wel'}</h1>
-$lt{'mes'}<p>
+$welcome<p>
 <a href="/adm/$lt{'log'}">$lt{'pro'}</a></p>
 $continuelink
 $end_page
@@ -274,7 +274,8 @@ sub handler {
     my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'},
                                       $form{'serverid'});
 
-    if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost')) {
+    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);
         return OK;
     } else {
@@ -414,17 +415,34 @@ sub handler {
 	}
     }
 
-    unless (&check_can_host($r,\%form,$authhost)) {
-        return OK;
-    }
+    my ($is_balancer,$otherserver) = 
+        &Apache::lonnet::check_loadbalancing($form{'uname'},$form{'udom'});
 
-    if ($r->dir_config("lonBalancer") eq 'yes') {
-	&success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
-		 \%form);
-        my ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
-	$r->internal_redirect('/adm/switchserver?otherserver='.$otherserver.'&origurl='.$firsturl);
+    if ($is_balancer) {
+        if (!$otherserver) { 
+            ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
+        }
+        if ($otherserver) {
+            &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
+                     \%form);
+	    $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver.'&origurl='.$firsturl);
+        } else {
+            $r->print(&noswitch());
+        }
         return OK;
     } else {
+        if (!&check_can_host($r,\%form,$authhost)) {
+            my ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
+            if ($otherserver) {
+                &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
+                         \%form);
+                $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver.'&origurl='.$firsturl);
+            } else {
+                $r->print(&noswitch());
+            }
+            return OK;
+        }
+
 # ------------------------------------------------------- Do the load balancing
 
 # ---------------------------------------------------------- Determine own load
@@ -441,6 +459,9 @@ sub handler {
 # ---------------------------------------------------------- Are we overloaded?
         if ((($userloadpercent>100.0)||($loadpercent>100.0))) {
             my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent,1,$form{'udom'});
+            if (!$unloaded) {
+                ($unloaded) = &Apache::lonnet::choose_server($form{'udom'});
+            }
             if ($unloaded) {
                 &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',
                          undef,\%form);
@@ -486,7 +507,9 @@ sub check_can_host {
     }
     unless ($canhost) {
         if ($authhost eq 'no_account_on_host') {
-            my ($login_host,$hostname) = &Apache::lonnet::choose_server($udom);
+            my $checkloginvia = 1;
+            my ($login_host,$hostname) = 
+                &Apache::lonnet::choose_server($udom,$checkloginvia);
             &Apache::loncommon::content_type($r,'text/html');
             $r->send_http_header;
             if ($login_host ne '') {
@@ -516,6 +539,15 @@ sub check_can_host {
     return $canhost;
 }
 
+sub noswitch {
+    my $result = &Apache::loncommon::start_page('Access to LON-CAPA unavailable').
+                 '<h3>'.&mt('Session unavailable').'</h3>'.
+                 &mt('This LON-CAPA server is unable to host your session.').'<br />'.
+                 '<p>'.&mt('Currently no other LON-CAPA server is available to host your session either.').'</p>'.
+                 &Apache::loncommon::end_page();
+    return $result;
+}
+
 1;
 __END__