--- loncom/auth/lonlogin.pm	2009/05/14 10:21:10	1.120
+++ loncom/auth/lonlogin.pm	2009/10/06 21:58:30	1.126
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # Login Screen
 #
-# $Id: lonlogin.pm,v 1.120 2009/05/14 10:21:10 foxr Exp $
+# $Id: lonlogin.pm,v 1.126 2009/10/06 21:58:30 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -46,7 +46,7 @@ sub handler {
 	(join('&',$ENV{'QUERY_STRING'},$env{'request.querystring'},
 	      $ENV{'REDIRECT_QUERY_STRING'}),
 	 ['interface','username','domain','firsturl','localpath','localres',
-	  'token']);
+	  'token','role','symb']);
     if (!defined($env{'form.firsturl'})) {
         &Apache::lonacc::get_posted_cgi($r,['firsturl']);
     }
@@ -81,11 +81,15 @@ sub handler {
 	    &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'}; 
+        }
 	$r->print(
                   $start_page
                  .'<h1>'.&mt('You are already logged in!').'</h1>'
                  .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].',
-                  '<a href="/adm/roles">','</a>','<a href="/adm/logout">','</a>').'</p>'
+                  '<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>').'</p>'
                  .'<p><a href="/adm/loginproblems.html">'.&mt('Login problems?').'</a></p>'
                  .$end_page
                  );
@@ -107,7 +111,24 @@ sub handler {
     my $iconpath= 
 	&Apache::loncommon::lonhttpdurl($r->dir_config('lonIconsURL'));
 
+    my $lonhost = $r->dir_config('lonHostID');
     my $domain = &Apache::lonnet::default_login_domain();
+    my %domconfig = &Apache::loncommon::get_domainconf($domain);
+    if ($lonhost ne '') {
+        if (ref($domconfig{login}) eq 'HASH') {
+            if (ref($domconfig{login}{loginvia}) eq 'HASH') {
+                if ($domconfig{login}{loginvia}{$lonhost}) {
+                    my $loginvia = $domconfig{login}{loginvia}{$lonhost};
+                    my %servers = &Apache::lonnet::get_servers($domain);
+                    if (($servers{$loginvia} ne '') && ($loginvia ne $lonhost)) {
+                        $r->print(&redirect_page($loginvia));
+                        return OK;
+                    }
+                }
+            }
+        }
+    }
+
     if (($env{'form.domain'}) && 
 	(&Apache::lonnet::domain($env{'form.domain'},'description'))) {
 	$domain=$env{'form.domain'};
@@ -115,7 +136,6 @@ sub handler {
     my $role    = $r->dir_config('lonRole');
     my $loadlim = $r->dir_config('lonLoadLim');
     my $servadm = $r->dir_config('lonAdmEMail');
-    my $lonhost = $r->dir_config('lonHostID');
     my $tabdir  = $r->dir_config('lonTabDir');
     my $include = $r->dir_config('lonIncludes');
     my $expire  = $r->dir_config('lonExpire');
@@ -170,8 +190,18 @@ sub handler {
     if ($uextkey>2147483647) { $uextkey-=4294967296; }
 
 # -------------------------------------------------------- Store away log token
+    my $tokenextras;
+    if ($env{'form.role'}) {
+        $tokenextras = '&role='.&escape($env{'form.role'});
+    }
+    if ($env{'form.symb'}) {
+        if (!$tokenextras) {
+            $tokenextras = '&';
+        }
+        $tokenextras .= '&symb='.&escape($env{'form.symb'});
+    }
     my $logtoken=Apache::lonnet::reply(
-       'tmpput:'.$ukey.$lkey.'&'.$firsturl,
+       'tmpput:'.$ukey.$lkey.'&'.$firsturl.$tokenextras,
        $lonhost);
 
 # ------------------- If we cannot talk to ourselves, we are in serious trouble
@@ -264,6 +294,7 @@ my $now=time;
 my $js = (<<ENDSCRIPT);
 
 <script type="text/javascript" language="JavaScript">
+// <![CDATA[
 function send()
 {
 this.document.server.elements.uname.value
@@ -289,6 +320,7 @@ this.document.client.elements.upass$now.
 this.document.server.submit();
 return false;
 }
+// ]]>
 </script>
 
 ENDSCRIPT
@@ -344,10 +376,6 @@ $r->print(
 #  then just us a relative link to authenticate:
 #
 
-if ($otherserver eq "http://") {
-    $otherserver="";
-}
-
 $r->print(<<ENDSERVERFORM);
 <form name="server" action="$otherserver/adm/authenticate" method="post" target="_top">
    <input type="hidden" name="logtoken" value="$logtoken" />
@@ -385,7 +413,7 @@ my $contactblock = &contactdisplay(\%lt,
                             $version,$authdomain,\$helpdeskscript);
 
 my $loginform=(<<LFORM);
-<form name="client" onsubmit="return(send())">
+<form name="client" action="" onsubmit="return(send())">
   <input type="hidden" name="lextkey" value="$lextkey" />
   <input type="hidden" name="uextkey" value="$uextkey" />
   <b><label for="uname">$lt{'un'}</label>:</b><br />
@@ -481,8 +509,10 @@ $r->print(<<ENDDOCUMENT);
  </div>
 
 <script type="text/javascript">
+// <![CDATA[
 // the if prevents the script error if the browser can not handle this
 if ( document.client.uname ) { document.client.uname.focus(); }
+// ]]>
 </script>
 $helpdeskscript
 
@@ -492,6 +522,20 @@ ENDDOCUMENT
     return OK;
 }
 
+sub redirect_page {
+    my ($desthost) = @_;
+    my $protocol = $Apache::lonnet::protocol{$desthost};
+    $protocol = 'http' if ($protocol ne 'https');
+    my $url = $protocol.'://'.&Apache::lonnet::hostname($desthost).'/';
+    if ($env{'form.firsturl'} ne '') {
+        $url .='?firsturl='.$env{'form.firsturl'};
+    }
+    my $start_page = &Apache::loncommon::start_page('Switching Server',undef,
+                                                    {'redirect' => [0,$url],});
+    my $end_page   = &Apache::loncommon::end_page();
+    return $start_page.$end_page;
+}
+
 sub contactdisplay {
     my ($lt,$servadm,$showadminmail,$version,$authdomain,$helpdeskscript) = @_;
     my $contactblock;
@@ -509,6 +553,7 @@ sub contactdisplay {
         my $thisurl = &escape('/adm/login');
         $$helpdeskscript = <<"ENDSCRIPT";
 <script type="text/javascript">
+// <![CDATA[
 function helpdesk() {
     var codedom = document.client.udom.value;
     if (codedom == '') {
@@ -518,6 +563,7 @@ function helpdesk() {
     document.location.href = "/adm/helpdesk?"+querystr;
     return;
 }
+// ]]>
 </script>
 ENDSCRIPT
     }