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Diff for /loncom/auth/lonlogin.pm between versions 1.158.2.2 and 1.201

-version 1.158.2.2, 2015/03/06 22:36:56
+version 1.201, 2022/06/30 21:04:13
  Line 1
  # The LearningOnline Network
  # Login Screen
  #
  # $Id$
  #
  # Copyright Michigan State University Board of Trustees
  #
  # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
  #
  # LON-CAPA is free software; you can redistribute it and/or modify
  # it under the terms of the GNU General Public License as published by
  # the Free Software Foundation; either version 2 of the License, or
  # (at your option) any later version.
  #
  # LON-CAPA is distributed in the hope that it will be useful,
  # but WITHOUT ANY WARRANTY; without even the implied warranty of
  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  # GNU General Public License for more details.
  #
  # You should have received a copy of the GNU General Public License
  # along with LON-CAPA; if not, write to the Free Software
  # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  #
  # /home/httpd/html/adm/gpl.txt
  #
  # http://www.lon-capa.org/
  #
  package Apache::lonlogin;
  use strict;
  use Apache::Constants qw(:common);
  use Apache::File ();
  use Apache::lonnet;
  use Apache::loncommon();
  use Apache::lonauth();
  use Apache::lonlocal;
  use Apache::migrateuser();
  use lib '/home/httpd/lib/perl/';
- use LONCAPA;
+ use LONCAPA qw(:DEFAULT :match);
+ use URI::Escape;
- sub handler {
+ use HTML::Entities();
-     my $r = shift;
+ use CGI::Cookie();
-     &Apache::loncommon::get_unprocessed_cgi
+ sub handler {
- 	(join('&',$ENV{'QUERY_STRING'},$env{'request.querystring'},
+     my $r = shift;
- 	      $ENV{'REDIRECT_QUERY_STRING'}),
- 	 ['interface','username','domain','firsturl','localpath','localres',
+     &Apache::loncommon::get_unprocessed_cgi
- 	  'token','role','symb','iptoken']);
+ 	(join('&',$ENV{'QUERY_STRING'},$env{'request.querystring'},
-     if (!defined($env{'form.firsturl'})) {
+ 	      $ENV{'REDIRECT_QUERY_STRING'}),
-         &Apache::lonacc::get_posted_cgi($r,['firsturl']);
+ 	 ['interface','username','domain','firsturl','localpath','localres',
-     }
+ 	  'token','role','symb','iptoken','btoken','ltoken','ttoken','linkkey',
+           'saml','sso','retry']);
- # -- check if they are a migrating user
-     if (defined($env{'form.token'})) {
+ # -- check if they are a migrating user
- 	return &Apache::migrateuser::handler($r);
+     if (defined($env{'form.token'})) {
-     }
+         return &Apache::migrateuser::handler($r);
+     }
-     &Apache::loncommon::no_cache($r);
-     &Apache::lonlocal::get_language_handle($r);
+     my $lonhost = $r->dir_config('lonHostID');
-     &Apache::loncommon::content_type($r,'text/html');
+     if ($env{'form.ttoken'}) {
-     $r->send_http_header;
+         my %info = &Apache::lonnet::tmpget($env{'form.ttoken'});
-     return OK if $r->header_only;
+         &Apache::lonnet::tmpdel($env{'form.ttoken'});
+         if ($info{'origurl'}) {
+             $env{'form.firsturl'} = $info{'origurl'};
- # Are we re-routing?
+         }
-     my $londocroot = $r->dir_config('lonDocRoot');
+         if ($info{'ltoken'}) {
-     if (-e "$londocroot/lon-status/reroute.txt") {
+             $env{'form.ltoken'} = $info{'ltoken'};
- 	&Apache::lonauth::reroute($r);
+         } elsif ($info{'linkprot'}) {
- 	return OK;
+             $env{'form.linkprot'} = $info{'linkprot'};
-     }
+             foreach my $item ('linkprotuser','linkprotexit') {
+                 if ($info{$item} ne '') {
-     $env{'form.firsturl'} =~ s/(`)/'/g;
+                     $env{'form.'.$item} = $info{$item};
+                 }
- # -------------------------------- Prevent users from attempting to login twice
+             }
-     my $handle = &Apache::lonnet::check_for_valid_session($r);
+         } elsif ($info{'linkkey'} ne '') {
-     if ($handle ne '') {
+             $env{'form.linkkey'} = $info{'linkkey'};
-         my $lonidsdir=$r->dir_config('lonIDsDir');
+         }
-         if ($handle=~/^publicuser\_/) {
+     } elsif (($env{'form.sso'}) || ($env{'form.retry'})) {
- # For "public user" - remove it, we apparently really want to login
+         my $infotoken;
- 	    unlink($r->dir_config('lonIDsDir')."/$handle.id");
+         if ($env{'form.sso'}) {
-         } else {
+             $infotoken = $env{'form.sso'};
- # Indeed, a valid token is found
+         } else {
-             &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
+             $infotoken = $env{'form.retry'};
- 	    my $start_page =
+         }
- 	        &Apache::loncommon::start_page('Already logged in');
+         my $data = &Apache::lonnet::reply('tmpget:'.$infotoken,$lonhost);
- 	    my $end_page =
+         unless (($data=~/^error/) || ($data eq 'con_lost') ||
- 	        &Apache::loncommon::end_page();
+                 ($data eq 'no_such_host')) {
-             my $dest = '/adm/roles';
+             my %info = &decode_token($data);
-             if ($env{'form.firsturl'} ne '') {
+             foreach my $item (keys(%info)) {
-                 $dest = $env{'form.firsturl'};
+                 $env{'form.'.$item} = $info{$item};
              }
- 	    $r->print(
+             &Apache::lonnet::tmpdel($infotoken);
-                   $start_page
+         }
-                  .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>'
+     } else {
-                  .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].',
+         if (!defined($env{'form.firsturl'})) {
-                   '<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>').'</p>'
+             &Apache::lonacc::get_posted_cgi($r,['firsturl']);
-                  .$end_page
+         }
-                  );
+         if (!defined($env{'form.firsturl'})) {
-             return OK;
+             if ($ENV{'REDIRECT_URL'} =~ m{^/+tiny/+$LONCAPA::match_domain/+\w+$}) {
-         }
+                 $env{'form.firsturl'} = $ENV{'REDIRECT_URL'};
-     }
+             }
+         }
- # ---------------------------------------------------- No valid token, continue
+         if (($env{'form.firsturl'} =~ m{^/+tiny/+$LONCAPA::match_domain/+\w+$}) &&
+             (!$env{'form.ltoken'}) && (!$env{'form.linkprot'}) && (!$env{'form.linkkey'})) {
- # ---------------------------- Not possible to really login to domain "public"
+             &Apache::lonacc::get_posted_cgi($r,['linkkey']);
-     if ($env{'form.domain'} eq 'public') {
+         }
- 	$env{'form.domain'}='';
+         if ($env{'form.firsturl'} eq '/adm/logout') {
- 	$env{'form.username'}='';
+             delete($env{'form.firsturl'});
-     }
+         }
+     }
- # ------ Is this page requested because /adm/migrateuser detected an IP change?
-     my %sessiondata;
+ # For "public user" - remove any exising "public" cookie, as user really wants to log-in
-     if ($env{'form.iptoken'}) {
+     my ($handle,$lonidsdir,$expirepub,$userdom);
-         %sessiondata = &Apache::lonnet::tmpget($env{'form.iptoken'});
+     $lonidsdir=$r->dir_config('lonIDsDir');
-         unless ($sessiondata{'sessionserver'}) {
+     unless ($r->header_only) {
-             my $delete = &Apache::lonnet::tmpdel($env{'form.iptoken'});
+         $handle = &Apache::lonnet::check_for_valid_session($r,'lonID',undef,\$userdom);
-             delete($env{'form.iptoken'});
+         if ($handle ne '') {
-         }
+             if ($handle=~/^publicuser\_/) {
-     }
+                 unlink($r->dir_config('lonIDsDir')."/$handle.id");
- # ----------------------------------------------------------- Process Interface
+                 undef($handle);
-     $env{'form.interface'}=~s/\W//g;
+                 undef($userdom);
+                 $expirepub = 1;
-     (undef,undef,undef,undef,undef,undef,my $clientmobile) =
+             }
-         &Apache::loncommon::decode_user_agent();
+         }
+     }
-     my $iconpath=
- 	&Apache::loncommon::lonhttpdurl($r->dir_config('lonIconsURL'));
+     &Apache::loncommon::no_cache($r);
+     &Apache::lonlocal::get_language_handle($r);
-     my $lonhost = $r->dir_config('lonHostID');
+     &Apache::loncommon::content_type($r,'text/html');
-     my $domain = &Apache::lonnet::default_login_domain();
+     if ($expirepub) {
-     if ($lonhost ne '') {
+         my $c = new CGI::Cookie(-name    => 'lonPubID',
-         unless ($sessiondata{'sessionserver'}) {
+                                 -value   => '',
-             my $redirect = &check_loginvia($domain,$lonhost);
+                                 -expires => '-10y',);
-             if ($redirect) {
+         $r->header_out('Set-cookie' => $c);
-                 $r->print($redirect);
+     } elsif (($handle eq '') && ($userdom ne '')) {
-                 return OK;
+         my %cookies=CGI::Cookie->parse($r->header_in('Cookie'));
-             }
+         foreach my $name (keys(%cookies)) {
-         }
+             next unless ($name =~ /^lon(|S|Link|Pub)ID$/);
-     }
+             my $c = new CGI::Cookie(-name    => $name,
+                                     -value   => '',
-     if (($sessiondata{'domain'}) &&
+                                     -expires => '-10y',);
-         (&Apache::lonnet::domain($env{'form.domain'},'description'))) {
+             $r->headers_out->add('Set-cookie' => $c);
-         $domain=$sessiondata{'domain'};
+         }
-     } elsif (($env{'form.domain'}) &&
+     }
- 	(&Apache::lonnet::domain($env{'form.domain'},'description'))) {
+     $r->send_http_header;
- 	$domain=$env{'form.domain'};
+     return OK if $r->header_only;
-     }
-     my $role    = $r->dir_config('lonRole');
+ # Are we re-routing?
-     my $loadlim = $r->dir_config('lonLoadLim');
+     my $londocroot = $r->dir_config('lonDocRoot');
-     my $uloadlim= $r->dir_config('lonUserLoadLim');
+     if (-e "$londocroot/lon-status/reroute.txt") {
-     my $servadm = $r->dir_config('lonAdmEMail');
+ 	&Apache::lonauth::reroute($r);
-     my $tabdir  = $r->dir_config('lonTabDir');
+ 	return OK;
-     my $include = $r->dir_config('lonIncludes');
+     }
-     my $expire  = $r->dir_config('lonExpire');
-     my $version = $r->dir_config('lonVersion');
+ # Check if browser sent a LON-CAPA load balancer cookie (and this is a balancer)
-     my $host_name = &Apache::lonnet::hostname($lonhost);
+     my ($found_server,$balancer_cookie) = &Apache::lonnet::check_for_balancer_cookie($r,1);
- # --------------------------------------------- Default values for login fields
+     if ($found_server) {
+         my $hostname = &Apache::lonnet::hostname($found_server);
-     my ($authusername,$authdomain);
+         if ($hostname ne '') {
-     if ($sessiondata{'username'}) {
+             my $protocol = $Apache::lonnet::protocol{$found_server};
-         $authusername=$sessiondata{'username'};
+             $protocol = 'http' if ($protocol ne 'https');
-     } else {
+             my $dest = '/adm/roles';
-         $env{'form.username'} = &Apache::loncommon::cleanup_html($env{'form.username'});
+             if ($env{'form.firsturl'} ne '') {
-         $authusername=($env{'form.username'}?$env{'form.username'}:'');
+                 $dest = &HTML::Entities::encode($env{'form.firsturl'},'\'"<>&');
-     }
+             }
-     if ($sessiondata{'domain'}) {
+             my %info = (
-         $authdomain=$sessiondata{'domain'};
+                          balcookie => $lonhost.':'.$balancer_cookie,
-     } else {
+                        );
-         $env{'form.domain'} = &Apache::loncommon::cleanup_html($env{'form.domain'});
+             if ($env{'form.role'}) {
-         $authdomain=($env{'form.domain'}?$env{'form.domain'}:$domain);
+                 $info{'role'} = $env{'form.role'};
-     }
+             }
+             if ($env{'form.symb'}) {
- # ---------------------------------------------------------- Determine own load
+                 $info{'symb'} = $env{'form.symb'};
-     my $loadavg;
+             }
-     {
+             my $balancer_token = &Apache::lonnet::tmpput(\%info,$found_server);
- 	my $loadfile=Apache::File->new('/proc/loadavg');
+             unless (($balancer_token eq 'con_lost') || ($balancer_token eq 'refused') ||
- 	$loadavg=<$loadfile>;
+                     ($balancer_token eq 'unknown_cmd') || ($balancer_token eq 'no_such_host')) {
-     }
+                 $dest .=  (($dest=~/\?/)?'&amp;':'?') . 'btoken='.$balancer_token;
-     $loadavg =~ s/\s.*//g;
+             }
+             if ($env{'form.firsturl'} =~ m{^/tiny/$match_domain/\w+$}) {
-     my ($loadpercent,$userloadpercent);
+                 my %link_info;
-     if ($loadlim) {
+                 if ($env{'form.ltoken'}) {
-         $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);
+                     $link_info{'ltoken'} = $env{'form.ltoken'};
-     }
+                 } elsif ($env{'form.linkprot'}) {
-     if ($uloadlim) {
+                     $link_info{'linkprot'} = $env{'form.linkprot'};
-         $userloadpercent=&Apache::lonnet::userload();
+                     foreach my $item ('linkprotuser','linkprotexit') {
-     }
+                         if ($env{'form.'.$item} ne '') {
+                             $link_info{$item} = $env{'form.'.$item};
-     my $firsturl=
+                         }
-     ($env{'request.firsturl'}?$env{'request.firsturl'}:$env{'form.firsturl'});
+                     }
+                 } elsif ($env{'form.linkkey'} ne '') {
- # ----------------------------------------------------------- Get announcements
+                     $link_info{'linkkey'} = $env{'form.linkkey'};
-     my $announcements=&Apache::lonnet::getannounce();
+                 }
- # -------------------------------------------------------- Set login parameters
+                 if (keys(%link_info)) {
+                     $link_info{'origurl'} = $env{'form.firsturl'};
-     my @hexstr=('0','1','2','3','4','5','6','7',
+                     my $token = &Apache::lonnet::tmpput(\%link_info,$found_server,'link');
-                 '8','9','a','b','c','d','e','f');
+                     unless (($token eq 'con_lost') || ($token eq 'refused') ||
-     my $lkey='';
+                             ($token eq 'unknown_cmd') || ($token eq 'no_such_host')) {
-     for (0..7) {
+                         $dest .=  (($dest=~/\?/)?'&amp;':'?') . 'ttoken='.$token;
-         $lkey.=$hexstr[rand(15)];
+                     }
-     }
+                 }
+             }
-     my $ukey='';
+             unless ($found_server eq $lonhost) {
-     for (0..7) {
+                 my $alias = &Apache::lonnet::use_proxy_alias($r,$found_server);
-         $ukey.=$hexstr[rand(15)];
+                 $hostname = $alias if ($alias ne '');
-     }
+             }
+             my $url = $protocol.'://'.$hostname.$dest;
-     my $lextkey=hex($lkey);
+             my $start_page =
-     if ($lextkey>2147483647) { $lextkey-=4294967296; }
+                 &Apache::loncommon::start_page('Switching Server ...',undef,
+                                                {'redirect'       => [0,$url],});
-     my $uextkey=hex($ukey);
+             my $end_page   = &Apache::loncommon::end_page();
-     if ($uextkey>2147483647) { $uextkey-=4294967296; }
+             $r->print($start_page.$end_page);
+             return OK;
- # -------------------------------------------------------- Store away log token
+         }
-     my $tokenextras;
+     }
-     if ($env{'form.role'}) {
-         $tokenextras = '&role='.&escape($env{'form.role'});
+ #
-     }
+ # Check if a LON-CAPA load balancer sent user here because user's browser sent
-     if ($env{'form.symb'}) {
+ # it a balancer cookie for an active session on this server.
-         if (!$tokenextras) {
+ #
-             $tokenextras = '&';
-         }
+     my $balcookie;
-         $tokenextras .= '&symb='.&escape($env{'form.symb'});
+     if ($env{'form.btoken'}) {
-     }
+         my %info = &Apache::lonnet::tmpget($env{'form.btoken'});
-     if ($env{'form.iptoken'}) {
+         $balcookie = $info{'balcookie'};
-         if (!$tokenextras) {
+         &Apache::lonnet::tmpdel($env{'form.btoken'});
-             $tokenextras = '&&';
+         delete($env{'form.btoken'});
-         }
+     }
-         $tokenextras .= '&iptoken='.&escape($env{'form.iptoken'});
-     }
+ #
-     my $logtoken=Apache::lonnet::reply(
+ # If browser sent an old cookie for which the session file had been removed
-        'tmpput:'.$ukey.$lkey.'&'.$firsturl.$tokenextras,
+ # check if configuration for user's domain has a portal URL set.  If so
-        $lonhost);
+ # switch user's log-in to the portal.
+ #
- # -- If we cannot talk to ourselves, or hostID does not map to a hostname
- #    we are in serious trouble
+     if (($handle eq '') && ($userdom ne '')) {
+         my %domdefaults = &Apache::lonnet::get_domain_defaults($userdom);
-     if (($logtoken eq 'con_lost') || ($logtoken eq 'no_such_host')) {
+         if ($domdefaults{'portal_def'} =~ /^https?\:/) {
-         if ($logtoken eq 'no_such_host') {
+             my $start_page = &Apache::loncommon::start_page('Switching Server ...',undef,
-             &Apache::lonnet::logthis('No valid logtoken for log-in page -- unable to determine hostname for hostID: '.$lonhost.'. Check entry in hosts.tab');
+                                           {'redirect' => [0,$domdefaults{'portal_def'}],});
-         }
+             my $end_page   = &Apache::loncommon::end_page();
-         my $spares='';
+             $r->print($start_page.$end_page);
- 	my $last;
+             return OK;
-         foreach my $hostid (sort
+         }
- 			    {
+     }
- 				&Apache::lonnet::hostname($a) cmp
- 				    &Apache::lonnet::hostname($b);
+ # -------------------------------- Prevent users from attempting to login twice
- 			    }
+     if ($handle ne '') {
- 			    keys(%Apache::lonnet::spareid)) {
+         &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
-             next if ($hostid eq $lonhost);
+ 	my $start_page =
- 	    my $hostname = &Apache::lonnet::hostname($hostid);
+ 	    &Apache::loncommon::start_page('Already logged in');
- 	    next if (($last eq $hostname) || ($hostname eq ''));
+ 	my $end_page =
-             $spares.='<br /><font size="+1"><a href="http://'.
+ 	    &Apache::loncommon::end_page();
-                 $hostname.
+         my $dest = '/adm/roles';
-                 '/adm/login?domain='.$authdomain.'">'.
+         if ($env{'form.firsturl'} ne '') {
-                 $hostname.'</a>'.
+             $dest = &HTML::Entities::encode($env{'form.firsturl'},'\'"<>&');
-                 ' '.&mt('(preferred)').'</font>'.$/;
+         }
- 	    $last=$hostname;
+         if (($env{'form.ltoken'}) || ($env{'form.linkprot'})) {
-         }
+             my ($linkprot,$linkprotuser,$linkprotexit);
-         if ($spares) {
+             if ($env{'form.ltoken'}) {
-             $spares.= '<br />';
+                 my %info = &Apache::lonnet::tmpget($env{'form.ltoken'});
-         }
+                 $linkprot = $info{'linkprot'};
-         my %all_hostnames = &Apache::lonnet::all_hostnames();
+                 if ($info{'linkprotuser'} ne '') {
-         foreach my $hostid (sort
+                     $linkprotuser = $info{'linkprotuser'};
- 		    {
+                 }
- 			&Apache::lonnet::hostname($a) cmp
+                 if ($info{'linkprotexit'} ne '') {
- 			    &Apache::lonnet::hostname($b);
+                     $linkprotexit = $info{'linkprotexit'};
- 		    }
+                 }
- 		    keys(%all_hostnames)) {
+             } else {
-             next if ($hostid eq $lonhost || $Apache::lonnet::spareid{$hostid});
+                 $linkprot = $env{'form.linkprot'};
-             my $hostname = &Apache::lonnet::hostname($hostid);
+                 $linkprotuser = $env{'form.linkprotuser'};
-             next if (($last eq $hostname) || ($hostname eq ''));
+                 $linkprotexit = $env{'form.linkprotexit'};
-             $spares.='<br /><a href="http://'.
+             }
- 	             $hostname.
+             if ($linkprot) {
- 	             '/adm/login?domain='.$authdomain.'">'.
+                 my ($linkprotector,$deeplink) = split(/:/,$linkprot,2);
- 	             $hostname.'</a>';
+                 if (($deeplink =~ m{^/tiny/$match_domain/\w+$}) &&
-             $last=$hostname;
+                     ($linkprotuser ne '') && ($linkprotuser ne $env{'user.name'}.':'.$env{'user.domain'})) {
-          }
+                     my $ip = &Apache::lonnet::get_requestor_ip();
-          $r->print(
+                     my %linkprotinfo = (
-    '<html>'
+                                           origurl => $deeplink,
-   .'<head><title>'
+                                           linkprot => $linkprot,
-   .&mt('The LearningOnline Network with CAPA')
+                                           linkprotuser => $linkprotuser,
-   .'</title></head>'
+                                           linkprotexit => $linkprotexit,
-   .'<body bgcolor="#FFFFFF">'
+                                        );
-   .'<h1>'.&mt('The LearningOnline Network with CAPA').'</h1>'
+                     if ($env{'form.ltoken'}) {
-   .'<img src="/adm/lonKaputt/lonlogo_broken.gif" align="right" />'
+                         my $delete = &Apache::lonnet::tmpdel($env{'form.ltoken'});
-   .'<h3>'.&mt('This LON-CAPA server is temporarily not available for login.').'</h3>');
+                     }
-         if ($spares) {
+                     &Apache::migrateuser::logout($r,$ip,$handle,undef,undef,\%linkprotinfo);
-             $r->print('<p>'.&mt('Please attempt to login to one of the following servers:')
+                     return OK;
-                      .'</p>'
+                 }
-                      .$spares);
+                 if ($env{'user.linkprotector'}) {
-         }
+                     my @protectors = split(/,/,$env{'user.linkprotector'});
-         $r->print('</body>'
+                     unless (grep(/^\Q$linkprotector\E$/,@protectors)) {
-                  .'</html>'
+                         push(@protectors,$linkprotector);
-         );
+                         @protectors = sort { $a <=> $b } @protectors;
-         return OK;
+                         &Apache::lonnet::appenv({'user.linkprotector' => join(',',@protectors)});
-     }
+                     }
+                 } else {
- # ----------------------------------------------- Apparently we are in business
+                     &Apache::lonnet::appenv({'user.linkprotector' => $linkprotector });
-     $servadm=~s/\,/\<br \/\>/g;
+                 }
+                 if ($env{'user.linkproturi'}) {
- # ----------------------------------------------------------- Front page design
+                     my @proturis = split(/,/,$env{'user.linkproturi'});
-     my $pgbg=&Apache::loncommon::designparm('login.pgbg',$domain);
+                     unless (grep(/^\Q$deeplink\E$/,@proturis)) {
-     my $font=&Apache::loncommon::designparm('login.font',$domain);
+                         push(@proturis,$deeplink);
-     my $link=&Apache::loncommon::designparm('login.link',$domain);
+                         @proturis = sort @proturis;
-     my $vlink=&Apache::loncommon::designparm('login.vlink',$domain);
+                         &Apache::lonnet::appenv({'user.linkproturi' => join(',',@proturis)});
-     my $alink=&Apache::loncommon::designparm('login.alink',$domain);
+                     }
-     my $mainbg=&Apache::loncommon::designparm('login.mainbg',$domain);
+                 } else {
-     my $loginbox_bg=&Apache::loncommon::designparm('login.sidebg',$domain);
+                     &Apache::lonnet::appenv({'user.linkproturi' => $deeplink});
-     my $loginbox_header_bgcol=&Apache::loncommon::designparm('login.bgcol',$domain);
+                 }
-     my $loginbox_header_textcol=&Apache::loncommon::designparm('login.textcol',$domain);
+             }
-     my $logo=&Apache::loncommon::designparm('login.logo',$domain);
+         } elsif ($env{'form.linkkey'} ne '') {
-     my $img=&Apache::loncommon::designparm('login.img',$domain);
+             if ($env{'form.firsturl'} =~ m{^/tiny/$match_domain/\w+$}) {
-     my $domainlogo=&Apache::loncommon::domainlogo($domain);
+                 my $linkkey = $env{'form.linkkey'};
-     my $showbanner = 1;
+                 if ($env{'user.deeplinkkey'}) {
-     my $showmainlogo = 1;
+                     my @linkkeys = split(/,/,$env{'user.deeplinkkey'});
-     if (defined(&Apache::loncommon::designparm('login.showlogo_img',$domain))) {
+                     unless (grep(/^\Q$linkkey\E$/,@linkkeys)) {
-         $showbanner = &Apache::loncommon::designparm('login.showlogo_img',$domain);
+                         push(@linkkeys,$linkkey);
-     }
+                         &Apache::lonnet::appenv({'user.deeplinkkey' => join(',',sort(@linkkeys))});
-     if (defined(&Apache::loncommon::designparm('login.showlogo_logo',$domain))) {
+                     }
-         $showmainlogo = &Apache::loncommon::designparm('login.showlogo_logo',$domain);
+                 } else {
-     }
+                     &Apache::lonnet::appenv({'user.deeplinkkey' => $linkkey});
-     my $showadminmail;
+                 }
-     my @possdoms = &Apache::lonnet::current_machine_domains();
+                 my $deeplink = $env{'form.firsturl'};
-     if (grep(/^\Q$domain\E$/,@possdoms)) {
+                 if ($env{'user.keyedlinkuri'}) {
-         $showadminmail=&Apache::loncommon::designparm('login.adminmail',$domain);
+                     my @keyeduris = split(/,/,$env{'user.keyedlinkuri'});
-     }
+                     unless (grep(/^\Q$deeplink\E$/,@keyeduris)) {
-     my $showcoursecat =
+                         push(@keyeduris,$deeplink);
-         &Apache::loncommon::designparm('login.coursecatalog',$domain);
+                         &Apache::lonnet::appenv({'user.keyedlinkuri' => join(',',sort(@keyeduris))});
-     my $shownewuserlink =
+                     }
-         &Apache::loncommon::designparm('login.newuser',$domain);
+                 } else {
-     my $showhelpdesk =
+                     &Apache::lonnet::appenv({'user.keyedlinkuri' => $deeplink});
-         &Apache::loncommon::designparm('login.helpdesk',$domain);
+                 }
-     my $now=time;
+             }
-     my $js = (<<ENDSCRIPT);
+         }
+         if ($env{'form.ltoken'}) {
- <script type="text/javascript" language="JavaScript">
+             my $delete = &Apache::lonnet::tmpdel($env{'form.ltoken'});
- // <![CDATA[
+         }
- function send()
+ 	$r->print(
- {
+                   $start_page
- this.document.server.elements.uname.value
+                  .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>'
- =this.document.client.elements.uname.value;
+                  .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].',
+                   '<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>').'</p>'
- this.document.server.elements.udom.value
+                  .$end_page
- =this.document.client.elements.udom.value;
+                  );
+         return OK;
- uextkey=this.document.client.elements.uextkey.value;
+     }
- lextkey=this.document.client.elements.lextkey.value;
- initkeys();
+ # ---------------------------------------------------- No valid token, continue
- this.document.server.elements.upass0.value
+ # ---------------------------- Not possible to really login to domain "public"
-     =crypted(this.document.client.elements.upass$now.value.substr(0,15));
+     if ($env{'form.domain'} eq 'public') {
- this.document.server.elements.upass1.value
+ 	$env{'form.domain'}='';
-     =crypted(this.document.client.elements.upass$now.value.substr(15,15));
+ 	$env{'form.username'}='';
- this.document.server.elements.upass2.value
+     }
-     =crypted(this.document.client.elements.upass$now.value.substr(30,15));
+ # ------ Is this page requested because /adm/migrateuser detected an IP change?
- this.document.client.elements.uname.value='';
+     my %sessiondata;
- this.document.client.elements.upass$now.value='';
+     if ($env{'form.iptoken'}) {
+         %sessiondata = &Apache::lonnet::tmpget($env{'form.iptoken'});
- this.document.server.submit();
+         unless ($sessiondata{'sessionserver'}) {
- return false;
+             my $delete = &Apache::lonnet::tmpdel($env{'form.iptoken'});
- }
+             delete($env{'form.iptoken'});
+         }
- function enableInput() {
+     }
-     this.document.client.elements.upass$now.removeAttribute("readOnly");
+ # ----------------------------------------------------------- Process Interface
-     this.document.client.elements.uname.removeAttribute("readOnly");
+     $env{'form.interface'}=~s/\W//g;
-     this.document.client.elements.udom.removeAttribute("readOnly");
-     return;
+     (undef,undef,undef,undef,undef,undef,my $clientmobile) =
- }
+         &Apache::loncommon::decode_user_agent($r);
- // ]]>
+     my $iconpath=
- </script>
+ 	&Apache::loncommon::lonhttpdurl($r->dir_config('lonIconsURL'));
- ENDSCRIPT
+     my $domain = &Apache::lonnet::default_login_domain();
+     my $defdom = $domain;
- # --------------------------------------------------- Print login screen header
+     if ($lonhost ne '') {
+         unless ($sessiondata{'sessionserver'}) {
-     my %add_entries = (
+             my $redirect = &check_loginvia($domain,$lonhost,$lonidsdir,$balcookie);
- 	       bgcolor      => "$mainbg",
+             if ($redirect) {
- 	       text         => "$font",
+                 $r->print($redirect);
- 	       link         => "$link",
+                 return OK;
- 	       vlink        => "$vlink",
+             }
- 	       alink        => "$alink",
+         }
-                onload       => 'javascript:enableInput();',);
+     }
-     my %defaultdomconf = &Apache::loncommon::get_domainconf($defdom);
+     if (($sessiondata{'domain'}) &&
-     my $headextra = $defaultdomconf{$defdom.'.login.headtag_'.$lonhost};
+         (&Apache::lonnet::domain($sessiondata{'domain'},'description'))) {
-     my $headextra_exempt = $defaultdomconf{$domain.'.login.headtag_exempt_'.$lonhost};
+         $domain=$sessiondata{'domain'};
-     if ($headextra) {
+     } elsif (($env{'form.domain'}) &&
-         my $omitextra;
+ 	(&Apache::lonnet::domain($env{'form.domain'},'description'))) {
-         if ($headextra_exempt ne '') {
+ 	$domain=$env{'form.domain'};
-             my @exempt = split(',',$headextra_exempt);
+     }
-             my $ip = $ENV{'REMOTE_ADDR'};
-             if (grep(/^\Q$ip\E$/,@exempt)) {
+     my $role    = $r->dir_config('lonRole');
-                 $omitextra = 1;
+     my $loadlim = $r->dir_config('lonLoadLim');
-             }
+     my $uloadlim= $r->dir_config('lonUserLoadLim');
-         }
+     my $servadm = $r->dir_config('lonAdmEMail');
-         unless ($omitextra) {
+     my $tabdir  = $r->dir_config('lonTabDir');
-             my $confname = $defdom.'-domainconfig';
+     my $include = $r->dir_config('lonIncludes');
-             if ($headextra =~ m{^\Q/res/$defdom/$confname/login/headtag/$lonhost/\E}) {
+     my $expire  = $r->dir_config('lonExpire');
-                 my $extra = &Apache::lonnet::getfile(&Apache::lonnet::filelocation("",$headextra));
+     my $version = $r->dir_config('lonVersion');
-                 unless ($extra eq '-1') {
+     my $host_name = &Apache::lonnet::hostname($lonhost);
-                     $js .= "\n".$extra."\n";
-                 }
+ # --------------------------------------------- Default values for login fields
-             }
-         }
+     my ($authusername,$authdomain);
-     }
+     if ($sessiondata{'username'}) {
+         $authusername=$sessiondata{'username'};
-     $r->print(&Apache::loncommon::start_page('The LearningOnline Network with CAPA Login',$js,
+     } else {
- 			       { 'redirect'       => [$expire,'/adm/roles'],
+         $env{'form.username'} = &Apache::loncommon::cleanup_html($env{'form.username'});
- 				 'add_entries' => \%add_entries,
+         $authusername=($env{'form.username'}?$env{'form.username'}:'');
- 				 'only_body'   => 1,}));
+     }
+     if ($sessiondata{'domain'}) {
- # ----------------------------------------------------------------------- Texts
+         $authdomain=$sessiondata{'domain'};
+     } else {
-     my %lt=&Apache::lonlocal::texthash(
+         $env{'form.domain'} = &Apache::loncommon::cleanup_html($env{'form.domain'});
-           'un'       => 'Username',
+         $authdomain=($env{'form.domain'}?$env{'form.domain'}:$domain);
-           'pw'       => 'Password',
+     }
-           'dom'      => 'Domain',
-           'perc'     => 'percent',
+ # ---------------------------------------------------------- Determine own load
-           'load'     => 'Server Load',
+     my $loadavg;
-           'userload' => 'User Load',
+     {
-           'catalog'  => 'Course/Community Catalog',
+ 	my $loadfile=Apache::File->new('/proc/loadavg');
-           'log'      => 'Log in',
+ 	$loadavg=<$loadfile>;
-           'help'     => 'Log-in Help',
+     }
-           'serv'     => 'Server',
+     $loadavg =~ s/\s.*//g;
-           'servadm'  => 'Server Administration',
-           'helpdesk' => 'Contact Helpdesk',
+     my ($loadpercent,$userloadpercent);
-           'forgotpw' => 'Forgot password?',
+     if ($loadlim) {
-           'newuser'  => 'New User?',
+         $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);
-        );
+     }
- # -------------------------------------------------- Change password field name
+     if ($uloadlim) {
+         $userloadpercent=&Apache::lonnet::userload();
-     my $forgotpw = &forgotpwdisplay(%lt);
+     }
-     $forgotpw .= '<br />' if $forgotpw;
-     my $loginhelp = &Apache::lonauth::loginhelpdisplay($authdomain);
+     my $firsturl=
-     if ($loginhelp) {
+     ($env{'request.firsturl'}?$env{'request.firsturl'}:$env{'form.firsturl'});
-         $loginhelp = '<a href="'.$loginhelp.'">'.$lt{'help'}.'</a><br />';
-     }
+ # ----------------------------------------------------------- Get announcements
+     my $announcements=&Apache::lonnet::getannounce();
- # ---------------------------------------------------- Serve out DES JavaScript
+ # -------------------------------------------------------- Set login parameters
-     {
-     my $jsh=Apache::File->new($include."/londes.js");
+     my @hexstr=('0','1','2','3','4','5','6','7',
-     $r->print(<$jsh>);
+                 '8','9','a','b','c','d','e','f');
-     }
+     my $lkey='';
- # ---------------------------------------------------------- Serve rest of page
+     for (0..7) {
+         $lkey.=$hexstr[rand(15)];
-     $r->print(
+     }
-     '<div class="LC_Box"'
-    .' style="margin:0 auto; padding:10px; width:90%; height: auto; background-color:#FFFFFF;">'
+     my $ukey='';
- );
+     for (0..7) {
+         $ukey.=$hexstr[rand(15)];
-     $r->print(<<ENDSERVERFORM);
+     }
- <form name="server" action="/adm/authenticate" method="post" target="_top">
-    <input type="hidden" name="logtoken" value="$logtoken" />
+     my $lextkey=hex($lkey);
-    <input type="hidden" name="serverid" value="$lonhost" />
+     if ($lextkey>2147483647) { $lextkey-=4294967296; }
-    <input type="hidden" name="uname" value="" />
-    <input type="hidden" name="upass0" value="" />
+     my $uextkey=hex($ukey);
-    <input type="hidden" name="upass1" value="" />
+     if ($uextkey>2147483647) { $uextkey-=4294967296; }
-    <input type="hidden" name="upass2" value="" />
-    <input type="hidden" name="udom" value="" />
+ # -------------------------------------------------------- Store away log token
-    <input type="hidden" name="localpath" value="$env{'form.localpath'}" />
+     my ($tokenextras,$tokentype,$linkprot_for_login);
-    <input type="hidden" name="localres" value="$env{'form.localres'}" />
+     my @names = ('role','symb','iptoken','ltoken','linkprotuser','linkprotexit','linkprot','linkkey');
-   </form>
+     foreach my $name (@names) {
- ENDSERVERFORM
+         if ($env{'form.'.$name} ne '') {
-     my $coursecatalog;
+             if ($name eq 'ltoken') {
-     if (($showcoursecat eq '') || ($showcoursecat)) {
+                 my %info = &Apache::lonnet::tmpget($env{'form.'.$name});
-         $coursecatalog = &coursecatalog_link($lt{'catalog'}).'<br />';
+                 if ($info{'linkprot'}) {
-     }
+                     $linkprot_for_login = $info{'linkprot'};
-     my $newuserlink;
+                     $tokenextras .= '&linkprot='.&escape($info{'linkprot'});
-     if ($shownewuserlink) {
+                     foreach my $item ('linkprotuser','linkprotexit') {
-         $newuserlink = &newuser_link($lt{'newuser'}).'<br />';
+                         if ($info{$item}) {
-     }
+                             $tokenextras .= '&'.$item.'='.&escape($info{$item});
-     my $logintitle =
+                         }
-         '<h2 class="LC_hcell"'
+                     }
-        .' style="background:'.$loginbox_header_bgcol.';'
+                     $tokentype = 'link';
-        .' color:'.$loginbox_header_textcol.'">'
+                     last;
-        .$lt{'log'}
+                 }
-        .'</h2>';
+             } else {
+                 $tokenextras .= '&'.$name.'='.&escape($env{'form.'.$name});
-     my $noscript_warning='<noscript><span class="LC_warning"><b>'
+                 if (($name eq 'linkkey') || ($name eq 'linkprot')) {
-                         .&mt('Use of LON-CAPA requires Javascript to be enabled in your web browser.')
+                     if ((($env{'form.retry'}) || ($env{'form.sso'})) &&
-                         .'</b></span></noscript>';
+                         (!$env{'form.ltoken'}) && ($name eq 'linkprot')) {
-     my $helpdeskscript;
+                         $linkprot_for_login = $env{'form.linkprot'};
-     my $contactblock = &contactdisplay(\%lt,$servadm,$showadminmail,
+                     }
-                                        $authdomain,\$helpdeskscript,
+                     $tokentype = 'link';
-                                        $showhelpdesk,\@possdoms);
+                 }
+             }
-     my $mobileargs;
+         }
-     if ($clientmobile) {
+     }
-         $mobileargs = 'autocapitalize="off" autocorrect="off"';
+     if ($tokentype) {
-     }
+         $tokenextras .= ":$tokentype";
-     my $loginform=(<<LFORM);
+     }
- <form name="client" action="" onsubmit="return(send())">
+     my $logtoken=Apache::lonnet::reply(
-   <input type="hidden" name="lextkey" value="$lextkey" />
+        'tmpput:'.$ukey.$lkey.'&'.&escape($firsturl).$tokenextras,
-   <input type="hidden" name="uextkey" value="$uextkey" />
+        $lonhost);
-   <b><label for="uname">$lt{'un'}</label>:</b><br />
-   <input type="text" name="uname" id="uname" size="15" value="$authusername" readonly="readonly" $mobileargs /><br />
+ # -- If we cannot talk to ourselves, or hostID does not map to a hostname
-   <b><label for="upass$now">$lt{'pw'}</label>:</b><br />
+ #    we are in serious trouble
-   <input type="password" name="upass$now" id="upass$now" size="15" readonly="readonly" /><br />
-   <b><label for="udom">$lt{'dom'}</label>:</b><br />
+     if (($logtoken eq 'con_lost') || ($logtoken eq 'no_such_host')) {
-   <input type="text" name="udom" id="udom" size="15" value="$authdomain" readonly="readonly" $mobileargs /><br />
+         if ($logtoken eq 'no_such_host') {
-   <input type="submit" value="$lt{'log'}" />
+             &Apache::lonnet::logthis('No valid logtoken for log-in page -- unable to determine hostname for hostID: '.$lonhost.'. Check entry in hosts.tab');
- </form>
+         }
- LFORM
+         if ($env{'form.ltoken'}) {
+             &Apache::lonnet::tmpdel($env{'form.ltoken'});
-     if ($showbanner) {
+             delete($env{'form.ltoken'});
-         $r->print(<<HEADER);
+         }
- <!-- The LON-CAPA Header -->
+         my $spares='';
- <div style="background:$pgbg;margin:0;width:100%;">
+         my (@sparehosts,%spareservers);
-   <img src="$img" border="0" alt="The Learning Online Network with CAPA" />
+         my $sparesref = &Apache::lonnet::this_host_spares($defdom);
- </div>
+         if (ref($sparesref) eq 'HASH') {
- HEADER
+             foreach my $key (keys(%{$sparesref})) {
-     }
+                 if (ref($sparesref->{$key}) eq 'ARRAY') {
-     $r->print(<<ENDTOP);
+                     my @sorted = sort { &Apache::lonnet::hostname($a) cmp
- <div style="float:left;margin-top:0;">
+                                         &Apache::lonnet::hostname($b);
- <div class="LC_Box" style="background:$loginbox_bg;">
+                                       } @{$sparesref->{$key}};
-   $logintitle
+                     if (@sorted) {
-   $loginform
+                         if ($key eq 'primary') {
-   $noscript_warning
+                             unshift(@sparehosts,@sorted);
- </div>
+                         } elsif ($key eq 'default') {
+                             push(@sparehosts,@sorted);
- <div class="LC_Box" style="padding-top: 10px;">
+                         }
-   $loginhelp
+                     }
-   $forgotpw
+                 }
-   $contactblock
+             }
-   $newuserlink
+         }
-   $coursecatalog
+         foreach my $hostid (@sparehosts) {
- </div>
+             next if ($hostid eq $lonhost);
- </div>
+ 	    my $hostname = &Apache::lonnet::hostname($hostid);
+ 	    next if (($hostname eq '') || ($spareservers{$hostname}));
- <div>
+             $spareservers{$hostname} = 1;
- ENDTOP
+             my $protocol = $Apache::lonnet::protocol{$hostid};
-     if ($showmainlogo) {
+             $protocol = 'http' if ($protocol ne 'https');
-         $r->print(' <img src="'.$logo.'" alt="" />'."\n");
+             $spares.='<br /><span style="font-size: larger;"><a href="'.$protocol.'://'.
-     }
+                 $hostname.
- $r->print(<<ENDTOP);
+                 '/adm/login?domain='.$authdomain.'">'.
- $announcements
+                 $hostname.'</a>'.
- </div>
+                 ' '.&mt('(preferred)').'</span>'.$/;
- <hr style="clear:both;" />
+         }
- ENDTOP
+         if ($spares) {
-     my ($domainrow,$serverrow,$loadrow,$userloadrow,$versionrow);
+             $spares.= '<br />';
-     $domainrow = <<"END";
+         }
-       <tr>
+         my %all_hostnames = &Apache::lonnet::all_hostnames();
-        <td  align="left" valign="top">
+         foreach my $hostid (sort
-         <small><b>$lt{'dom'}:&nbsp;</b></small>
+ 		    {
-        </td>
+ 			&Apache::lonnet::hostname($a) cmp
-        <td  align="left" valign="top">
+ 			    &Apache::lonnet::hostname($b);
-         <small><tt>&nbsp;$domain</tt></small>
+ 		    }
-        </td>
+ 		    keys(%all_hostnames)) {
-       </tr>
+             next if ($hostid eq $lonhost);
- END
+             my $hostname = &Apache::lonnet::hostname($hostid);
-     $serverrow = <<"END";
+             next if (($hostname eq '') || ($spareservers{$hostname}));
-       <tr>
+             $spareservers{$hostname} = 1;
-        <td  align="left" valign="top">
+             my $protocol = $Apache::lonnet::protocol{$hostid};
-         <small><b>$lt{'serv'}:&nbsp;</b></small>
+             $protocol = 'http' if ($protocol ne 'https');
-        </td>
+             $spares.='<br /><a href="'.$protocol.'://'.
-        <td align="left" valign="top">
+ 	             $hostname.
-         <small><tt>&nbsp;$lonhost ($role)</tt></small>
+ 	             '/adm/login?domain='.$authdomain.'">'.
-        </td>
+ 	             $hostname.'</a>';
-       </tr>
+          }
- END
+          $r->print(
-     if ($loadlim) {
+    '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">'
-         $loadrow = <<"END";
+   .'<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">'
-       <tr>
+   .'<head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>'
-        <td align="left" valign="top">
+   .&mt('The LearningOnline Network with CAPA')
-         <small><b>$lt{'load'}:&nbsp;</b></small>
+   .'</title></head>'
-        </td>
+   .'<body bgcolor="#FFFFFF">'
-        <td align="left" valign="top">
+   .'<h1>'.&mt('The LearningOnline Network with CAPA').'</h1>'
-         <small><tt>&nbsp;$loadpercent $lt{'perc'}</tt></small>
+   .'<img src="/adm/lonKaputt/lonlogo_broken.gif" alt="broken icon" align="right" />'
-        </td>
+   .'<h3>'.&mt('This LON-CAPA server is temporarily not available for login.').'</h3>');
-       </tr>
+         if ($spares) {
- END
+             $r->print('<p>'.&mt('Please attempt to login to one of the following servers:')
-     }
+                      .'</p>'
-     if ($uloadlim) {
+                      .$spares);
-         $userloadrow = <<"END";
+         }
-       <tr>
+         $r->print('</body>'
-        <td align="left" valign="top">
+                  .'</html>'
-         <small><b>$lt{'userload'}:&nbsp;</b></small>
+         );
-        </td>
+         return OK;
-        <td align="left" valign="top">
+     }
-         <small><tt>&nbsp;$userloadpercent $lt{'perc'}</tt></small>
-        </td>
+ # ----------------------------------------------- Apparently we are in business
-       </tr>
+     $servadm=~s/\,/\<br \/\>/g;
- END
-     }
+ # ----------------------------------------------------------- Front page design
-     if (($version ne '') && ($version ne '<!-- VERSION -->')) {
+     my $pgbg=&Apache::loncommon::designparm('login.pgbg',$domain);
-         $versionrow = <<"END";
+     my $font=&Apache::loncommon::designparm('login.font',$domain);
-       <tr>
+     my $link=&Apache::loncommon::designparm('login.link',$domain);
-        <td colspan="2" align="left">
+     my $vlink=&Apache::loncommon::designparm('login.vlink',$domain);
-         <small>$version</small>
+     my $alink=&Apache::loncommon::designparm('login.alink',$domain);
-        </td>
+     my $mainbg=&Apache::loncommon::designparm('login.mainbg',$domain);
-       </tr>
+     my $loginbox_bg=&Apache::loncommon::designparm('login.sidebg',$domain);
- END
+     my $loginbox_header_bgcol=&Apache::loncommon::designparm('login.bgcol',$domain);
-     }
+     my $loginbox_header_textcol=&Apache::loncommon::designparm('login.textcol',$domain);
+     my $logo=&Apache::loncommon::designparm('login.logo',$domain);
-     $r->print(<<ENDDOCUMENT);
+     my $img=&Apache::loncommon::designparm('login.img',$domain);
-     <div style="float: left;">
+     my $domainlogo=&Apache::loncommon::domainlogo($domain);
-      <table border="0" cellspacing="0" cellpadding="0">
+     my $showbanner = 1;
- $domainrow
+     my $showmainlogo = 1;
- $serverrow
+     if (defined(&Apache::loncommon::designparm('login.showlogo_img',$domain))) {
- $loadrow
+         $showbanner = &Apache::loncommon::designparm('login.showlogo_img',$domain);
- $userloadrow
+     }
- $versionrow
+     if (defined(&Apache::loncommon::designparm('login.showlogo_logo',$domain))) {
-      </table>
+         $showmainlogo = &Apache::loncommon::designparm('login.showlogo_logo',$domain);
-     </div>
+     }
-     <div style="float: right;">
+     my $showadminmail;
-     $domainlogo
+     my @possdoms = &Apache::lonnet::current_machine_domains();
-     </div>
+     if (grep(/^\Q$domain\E$/,@possdoms)) {
-     <br style="clear:both;" />
+         $showadminmail=&Apache::loncommon::designparm('login.adminmail',$domain);
-  </div>
+     }
+     my $showcoursecat =
- <script type="text/javascript">
+         &Apache::loncommon::designparm('login.coursecatalog',$domain);
- // <![CDATA[
+     my $shownewuserlink =
- // the if prevents the script error if the browser can not handle this
+         &Apache::loncommon::designparm('login.newuser',$domain);
- if ( document.client.uname ) { document.client.uname.focus(); }
+     my $showhelpdesk =
- // ]]>
+         &Apache::loncommon::designparm('login.helpdesk',$domain);
- </script>
+     my $now=time;
- $helpdeskscript
+     my $js = (<<ENDSCRIPT);
- ENDDOCUMENT
+ <script type="text/javascript" language="JavaScript">
-     my %endargs = ( 'noredirectlink' => 1, );
+ // <![CDATA[
-     $r->print(&Apache::loncommon::end_page(\%endargs));
+ function send()
-     return OK;
+ {
- }
+ this.document.server.elements.uname.value
+ =this.document.client.elements.uname.value;
- sub check_loginvia {
-     my ($domain,$lonhost) = @_;
+ this.document.server.elements.udom.value
-     if ($domain eq '' || $lonhost eq '') {
+ =this.document.client.elements.udom.value;
-         return;
-     }
+ uextkey=this.document.client.elements.uextkey.value;
-     my %domconfhash = &Apache::loncommon::get_domainconf($domain);
+ lextkey=this.document.client.elements.lextkey.value;
-     my $loginvia = $domconfhash{$domain.'.login.loginvia_'.$lonhost};
+ initkeys();
-     my $loginvia_exempt = $domconfhash{$domain.'.login.loginvia_exempt_'.$lonhost};
-     my $output;
+ if(this.document.server.action.substr(0,5) === 'http:'){
-     if ($loginvia ne '') {
+     this.document.server.elements.upass0.value
-         my $noredirect;
+         =getCrypted(this.document.client.elements.upass$now.value);
-         my $ip = $ENV{'REMOTE_ADDR'};
+ } else {
-         if ($ip eq '127.0.0.1') {
+     this.document.server.elements.upass0.value
-             $noredirect = 1;
+         =this.document.client.elements.upass$now.value;
-         } else {
+ }
-             if ($loginvia_exempt ne '') {
-                 my @exempt = split(',',$loginvia_exempt);
+ this.document.client.elements.uname.value='';
-                 if (grep(/^\Q$ip\E$/,@exempt)) {
+ this.document.client.elements.upass$now.value='';
-                     $noredirect = 1;
-                 }
+ this.document.server.submit();
-             }
+ return false;
-         }
+ }
-         unless ($noredirect) {
-             my ($newhost,$path);
+ function enableInput() {
-             if ($loginvia =~ /:/) {
+     this.document.client.elements.upass$now.removeAttribute("readOnly");
-                 ($newhost,$path) = split(':',$loginvia);
+     this.document.client.elements.uname.removeAttribute("readOnly");
-             } else {
+     this.document.client.elements.udom.removeAttribute("readOnly");
-                 $newhost = $loginvia;
+     return;
-             }
+ }
-             if ($newhost ne $lonhost) {
-                 if (&Apache::lonnet::hostname($newhost) ne '') {
+ // ]]>
-                     $output = &redirect_page($newhost,$path);
+ </script>
-                 }
-             }
+ ENDSCRIPT
-         }
-     }
+     my ($lonhost_in_use,@hosts,%defaultdomconf,$saml_prefix,$saml_landing,
-     return $output;
+         $samlssotext,$samlnonsso,$samlssoimg,$samlssoalt,$samlssourl,$samltooltip);
- }
+     %defaultdomconf = &Apache::loncommon::get_domainconf($defdom);
+     @hosts = &Apache::lonnet::current_machine_ids();
- sub redirect_page {
+     $lonhost_in_use = $lonhost;
-     my ($desthost,$path) = @_;
+     if (@hosts > 1) {
-     my $protocol = $Apache::lonnet::protocol{$desthost};
+         foreach my $hostid (@hosts) {
-     $protocol = 'http' if ($protocol ne 'https');
+             if (&Apache::lonnet::host_domain($hostid) eq $defdom) {
-     unless ($path =~ m{^/}) {
+                 $lonhost_in_use = $hostid;
-         $path = '/'.$path;
+                 last;
-     }
+             }
-     my $url = $protocol.'://'.&Apache::lonnet::hostname($desthost).$path;
+         }
-     if ($env{'form.firsturl'} ne '') {
+     }
-         $url .='?firsturl='.$env{'form.firsturl'};
+     $saml_prefix = $defdom.'.login.saml_';
-     }
+     if ($defaultdomconf{$saml_prefix.$lonhost_in_use}) {
-     my $start_page = &Apache::loncommon::start_page('Switching Server ...',undef,
+         $saml_landing = 1;
-                                                     {'redirect' => [0,$url],});
+         $samlssotext = $defaultdomconf{$saml_prefix.'text_'.$lonhost_in_use};
-     my $end_page   = &Apache::loncommon::end_page();
+         $samlnonsso = $defaultdomconf{$saml_prefix.'notsso_'.$lonhost_in_use};
-     return $start_page.$end_page;
+         $samlssoimg = $defaultdomconf{$saml_prefix.'img_'.$lonhost_in_use};
- }
+         $samlssoalt = $defaultdomconf{$saml_prefix.'alt_'.$lonhost_in_use};
+         $samlssourl = $defaultdomconf{$saml_prefix.'url_'.$lonhost_in_use};
- sub contactdisplay {
+         $samltooltip = $defaultdomconf{$saml_prefix.'title_'.$lonhost_in_use};
-     my ($lt,$servadm,$showadminmail,$authdomain,$helpdeskscript,$showhelpdesk,
+     }
-         $possdoms) = @_;
+     if ($saml_landing) {
-     my $contactblock;
+        if ($samlssotext eq '') {
-     my $origmail;
+            $samlssotext = 'SSO Login';
-     if (ref($possdoms) eq 'ARRAY') {
+        }
-         if (grep(/^\Q$authdomain\E$/,@{$possdoms})) {
+        if ($samlnonsso eq '') {
-             $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'};
+            $samlnonsso = 'Non-SSO Login';
-         }
+        }
-     }
+        $js .= <<"ENDSAMLJS";
-     my $requestmail =
-         &Apache::loncommon::build_recipient_list(undef,'helpdeskmail',
+ <script type="text/javascript">
-                                                  $authdomain,$origmail);
+ // <![CDATA[
-     unless ($showhelpdesk eq '0') {
+ function toggleLClogin() {
-         if ($requestmail =~ m/[^\@]+\@[^\@]+/) {
+     if (document.getElementById('LC_standard_login')) {
-             $showhelpdesk = 1;
+         if (document.getElementById('LC_standard_login').style.display == 'none') {
-         } else {
+             document.getElementById('LC_standard_login').style.display = 'inline-block';
-             $showhelpdesk = 0;
+             if (document.getElementById('LC_login_text')) {
-         }
+                 document.getElementById('LC_login_text').innerHTML = '$samlnonsso';
-     }
+             }
-     if ($servadm && $showadminmail) {
+             if ( document.client.uname ) { document.client.uname.focus(); }
-         $contactblock .= $$lt{'servadm'}.':<br />'.
+             if (document.getElementById('LC_SSO_login')) {
-                          '<tt>'.$servadm.'</tt><br />';
+                 document.getElementById('LC_SSO_login').style.display = 'none';
-     }
+             }
-     if ($showhelpdesk) {
+         } else {
-         $contactblock .= '<a href="javascript:helpdesk()">'.$lt->{'helpdesk'}.'</a><br />';
+             document.getElementById('LC_standard_login').style.display = 'none';
-         my $thisurl = &escape('/adm/login');
+             if (document.getElementById('LC_login_text')) {
-         $$helpdeskscript = <<"ENDSCRIPT";
+                 document.getElementById('LC_login_text').innerHTML = '$samlssotext';
- <script type="text/javascript">
+             }
- // <![CDATA[
+             if (document.getElementById('LC_SSO_login')) {
- function helpdesk() {
+                 document.getElementById('LC_SSO_login').style.display = 'inline-block';
-     var possdom = document.client.udom.value;
+             }
-     var codedom = possdom.replace( new RegExp("[^A-Za-z0-9.\\-]","g"),'');
+         }
-     if (codedom == '') {
+     }
-         codedom = "$authdomain";
+     return;
-     }
+ }
-     var querystr = "origurl=$thisurl&codedom="+codedom;
-     document.location.href = "/adm/helpdesk?"+querystr;
+ // ]]>
-     return;
+ </script>
- }
- // ]]>
+ ENDSAMLJS
- </script>
+     }
- ENDSCRIPT
-     }
+ # --------------------------------------------------- Print login screen header
-     return $contactblock;
- }
+     my %add_entries = (
+ 	       bgcolor      => "$mainbg",
- sub forgotpwdisplay {
+ 	       text         => "$font",
-     my (%lt) = @_;
+ 	       link         => "$link",
-     my $prompt_for_resetpw = 1;
+ 	       vlink        => "$vlink",
-     if ($prompt_for_resetpw) {
+ 	       alink        => "$alink",
-         return '<a href="/adm/resetpw">'.$lt{'forgotpw'}.'</a>';
+                onload       => 'javascript:enableInput();',);
-     }
-     return;
+     my ($headextra,$headextra_exempt);
- }
+     $headextra = $defaultdomconf{$defdom.'.login.headtag_'.$lonhost_in_use};
+     $headextra_exempt = $defaultdomconf{$domain.'.login.headtag_exempt_'.$lonhost_in_use};
- sub coursecatalog_link {
+     if ($headextra) {
-     my ($linkname) = @_;
+         my $omitextra;
-     return <<"END";
+         if ($headextra_exempt ne '') {
-       <a href="/adm/coursecatalog">$linkname</a>
+             my @exempt = split(',',$headextra_exempt);
- END
+             my $ip = &Apache::lonnet::get_requestor_ip();
- }
+             if (grep(/^\Q$ip\E$/,@exempt)) {
+                 $omitextra = 1;
- sub newuser_link {
+             }
-     my ($linkname) = @_;
+         }
-     return '<a href="/adm/createaccount">'.$linkname.'</a>';
+         unless ($omitextra) {
- }
+             my $confname = $defdom.'-domainconfig';
+             if ($headextra =~ m{^\Q/res/$defdom/$confname/login/headtag/$lonhost_in_use/\E}) {
-;
+                 my $extra = &Apache::lonnet::getfile(&Apache::lonnet::filelocation("",$headextra));
- __END__
+                 unless ($extra eq '-1') {
+                     $js .= "\n".$extra."\n";
+                 }
+             }
+         }
+     }
+     $r->print(&Apache::loncommon::start_page('The LearningOnline Network with CAPA Login',$js,
+ 			       { 'redirect'       => [$expire,'/adm/roles'],
+ 				 'add_entries' => \%add_entries,
+ 				 'only_body'   => 1,}));
+ # ----------------------------------------------------------------------- Texts
+     my %lt=&Apache::lonlocal::texthash(
+           'un'       => 'Username',
+           'pw'       => 'Password',
+           'dom'      => 'Domain',
+           'perc'     => 'percent',
+           'load'     => 'Server Load',
+           'userload' => 'User Load',
+           'catalog'  => 'Course/Community Catalog',
+           'log'      => 'Log in',
+           'help'     => 'Log-in Help',
+           'serv'     => 'Server',
+           'servadm'  => 'Server Administration',
+           'helpdesk' => 'Contact Helpdesk',
+           'forgotpw' => 'Forgot password?',
+           'newuser'  => 'New User?',
+           'change'   => 'Change?',
+        );
+ # -------------------------------------------------- Change password field name
+     my $forgotpw = &forgotpwdisplay(%lt);
+     $forgotpw .= '<br />' if $forgotpw;
+     my $loginhelp = &Apache::lonauth::loginhelpdisplay($authdomain);
+     if ($loginhelp) {
+         $loginhelp = '<a href="'.$loginhelp.'">'.$lt{'help'}.'</a><br />';
+     }
+ # ---------------------------------------------------- Serve out DES JavaScript
+     {
+     my $jsh=Apache::File->new($include."/londes.js");
+     $r->print(<$jsh>);
+     }
+ # ---------------------------------------------------------- Serve rest of page
+     $r->print(
+     '<div class="LC_Box"'
+    .' style="margin:0 auto; padding:10px; width:90%; height: auto; background-color:#FFFFFF;">'
+ );
+     $r->print(<<ENDSERVERFORM);
+ <form name="server" action="/adm/authenticate" method="post" target="_top">
+    <input type="hidden" name="logtoken" value="$logtoken" />
+    <input type="hidden" name="serverid" value="$lonhost" />
+    <input type="hidden" name="uname" value="" />
+    <input type="hidden" name="upass0" value="" />
+    <input type="hidden" name="udom" value="" />
+    <input type="hidden" name="localpath" value="$env{'form.localpath'}" />
+    <input type="hidden" name="localres" value="$env{'form.localres'}" />
+   </form>
+ ENDSERVERFORM
+     my $coursecatalog;
+     if (($showcoursecat eq '') || ($showcoursecat)) {
+         $coursecatalog = &coursecatalog_link($lt{'catalog'}).'<br />';
+     }
+     my $newuserlink;
+     if ($shownewuserlink) {
+         $newuserlink = &newuser_link($lt{'newuser'}).'<br />';
+     }
+     my $logintitle =
+         '<h2 class="LC_hcell"'
+        .' style="background:'.$loginbox_header_bgcol.';'
+        .' color:'.$loginbox_header_textcol.'">'
+        .$lt{'log'}
+        .'</h2>';
+     my $noscript_warning='<noscript><span class="LC_warning"><b>'
+                         .&mt('Use of LON-CAPA requires Javascript to be enabled in your web browser.')
+                         .'</b></span></noscript>';
+     my $helpdeskscript;
+     my $contactblock = &contactdisplay(\%lt,$servadm,$showadminmail,
+                                        $authdomain,\$helpdeskscript,
+                                        $showhelpdesk,\@possdoms);
+     my $mobileargs;
+     if ($clientmobile) {
+         $mobileargs = 'autocapitalize="off" autocorrect="off"';
+     }
+     my $loginform=(<<LFORM);
+ <form name="client" action="" onsubmit="return(send())" id="lclogin">
+   <input type="hidden" name="lextkey" value="$lextkey" />
+   <input type="hidden" name="uextkey" value="$uextkey" />
+   <b><label for="uname">$lt{'un'}</label>:</b><br />
+   <input type="text" name="uname" id="uname" size="15" value="$authusername" readonly="readonly" $mobileargs /><br />
+   <b><label for="upass$now">$lt{'pw'}</label>:</b><br />
+   <input type="password" name="upass$now" id="upass$now" size="15" readonly="readonly" /><br />
+   <b><label for="udom">$lt{'dom'}</label>:</b><br />
+   <input type="text" name="udom" id="udom" size="15" value="$authdomain" readonly="readonly" $mobileargs /><br />
+   <input type="submit" value="$lt{'log'}" />
+ </form>
+ LFORM
+     if ($showbanner) {
+         my $alttext = &Apache::loncommon::designparm('login.alttext_img',$domain);
+         if ($alttext eq '') {
+             $alttext = 'The Learning Online Network with CAPA';
+         }
+         $r->print(<<HEADER);
+ <!-- The LON-CAPA Header -->
+ <div style="background:$pgbg;margin:0;width:100%;">
+   <img src="$img" border="0" alt="$alttext" class="LC_maxwidth" id="lcloginbanner" />
+ </div>
+ HEADER
+     }
+     my $stdauthformstyle = 'inline-block';
+     my $ssoauthstyle = 'none';
+     my $logintype;
+     $r->print('<div style="float:left;margin-top:0;">');
+     if ($saml_landing) {
+         $ssoauthstyle = 'inline-block';
+         $stdauthformstyle = 'none';
+         $logintype = $samlssotext;
+         my $ssologin = '/adm/sso';
+         if ($samlssourl  ne '') {
+             $ssologin = $samlssourl;
+         }
+         if (($logtoken eq 'con_lost') || ($logtoken eq 'no_such_host')) {
+             my $querystring;
+             if ($env{'form.firsturl'} ne '') {
+                 $querystring = 'origurl=';
+                 if ($env{'form.firsturl'} =~ /[^\x00-\xFF]/) {
+                     $querystring .= &uri_escape_utf8($env{'form.firsturl'});
+                 } else {
+                     $querystring .= &uri_escape($env{'form.firsturl'});
+                 }
+                 $querystring = &HTML::Entities::encode($querystring,"'");
+             }
+             if ($env{'form.ltoken'} ne '') {
+                 $querystring .= (($querystring eq '')?'':'&amp;') . 'ltoken='.
+                                   &HTML::Entities::encode(&uri_escape($env{'form.ltoken'}));
+             } elsif ($env{'form.linkkey'}) {
+                 $querystring .= (($querystring eq '')?'':'&amp;') . 'linkkey='.
+                                   &HTML::Entities::encode(&uri_escape($env{'form.linkkey'}));
+             }
+             if ($querystring ne '') {
+                 $ssologin .= (($ssologin=~/\?/)?'&amp;':'?') . $querystring;
+             }
+         } elsif ($logtoken ne '') {
+             $ssologin .= (($ssologin=~/\?/)?'&amp;':'?') . 'logtoken='.$logtoken;
+         }
+         my $ssohref;
+         if ($samlssoimg ne '') {
+             $ssohref = '<a href="'.$ssologin.'" title="'.$samltooltip.'">'.
+                        '<img src="'.$samlssoimg.'" alt="'.$samlssoalt.'" id="lcssobutton" /></a>';
+         } else {
+             $ssohref = '<a href="'.$ssologin.'">'.$samlssotext.'</a>';
+         }
+         if (($env{'form.saml'} eq 'no') ||
+             (($env{'form.username'} ne '') && ($env{'form.domain'} ne ''))) {
+             $ssoauthstyle = 'none';
+             $stdauthformstyle = 'inline-block';
+             $logintype = $samlnonsso;
+         }
+         $r->print(<<ENDSAML);
+ <p>
+ Log-in type:
+ <span style="font-weight:bold" id="LC_login_text">$logintype</span><br />
+ <span><a href="javascript:toggleLClogin();" style="color:#000000">$lt{'change'}</a></span>
+ </p>
+ <div style="display:$ssoauthstyle" id="LC_SSO_login">
+ <div class="LC_Box" style="padding-top: 10px;">
+ $ssohref
+ $noscript_warning
+ </div>
+ <div class="LC_Box" style="padding-top: 10px;">
+ $loginhelp
+ $contactblock
+ $coursecatalog
+ </div>
+ </div>
+ ENDSAML
+     } else {
+         if ($env{'form.ltoken'}) {
+             &Apache::lonnet::tmpdel($env{'form.ltoken'});
+             delete($env{'form.ltoken'});
+         }
+     }
+     my $in_frame_js;
+     if ($linkprot_for_login) {
+         my ($linkprotector,$linkproturi) = split(/:/,$linkprot_for_login,2);
+         if (($linkprotector =~ /^\d+(c|d)$/) && ($linkproturi =~ m{^/+tiny/+$LONCAPA::match_domain/+\w+$})) {
+             my $set_target;
+             if (($env{'form.retry'}) || ($env{'form.sso'})) {
+                 if ($linkproturi eq $env{'form.firsturl'}) {
+                     $set_target = "    document.server.target = '_self';";
+                 }
+             } else {
+                 $set_target = <<ENDTARG;
+     var linkproturi = '$linkproturi';
+     var path = document.location.pathname.replace( new RegExp('^/adm/launch'),'');
+     if (linkproturi == path) {
+         document.server.target = '_self';
+     }
+ ENDTARG
+             }
+             $in_frame_js = <<ENDJS;
+ <script type="text/javascript">
+ // <![CDATA[
+ if ((window.self !== window.top) && (document.server.target != '_self')) {
+     $set_target
+ }
+ // ]]>
+ </script>
+ ENDJS
+         }
+     }
+     $r->print(<<ENDLOGIN);
+ <div style="display:$stdauthformstyle;" id="LC_standard_login">
+ <div class="LC_Box" style="background:$loginbox_bg;">
+   $logintitle
+   $loginform
+   $noscript_warning
+ </div>
+ <div class="LC_Box" style="padding-top: 10px;">
+   $loginhelp
+   $forgotpw
+   $contactblock
+   $newuserlink
+   $coursecatalog
+ </div>
+ </div>
+ ENDLOGIN
+     $r->print('</div><div>'."\n");
+     if ($showmainlogo) {
+         my $alttext = &Apache::loncommon::designparm('login.alttext_logo',$domain);
+         $r->print(' <img src="'.$logo.'" alt="'.$alttext.'" class="LC_maxwidth" id="lcloginmainlogo" />'."\n");
+     }
+ $r->print(<<ENDTOP);
+ $announcements
+ </div>
+ <hr style="clear:both;" />
+ ENDTOP
+     my ($domainrow,$serverrow,$loadrow,$userloadrow,$versionrow);
+     $domainrow = <<"END";
+       <tr>
+        <td  align="left" valign="top">
+         <small><b>$lt{'dom'}:&nbsp;</b></small>
+        </td>
+        <td  align="left" valign="top">
+         <small><tt>&nbsp;$domain</tt></small>
+        </td>
+       </tr>
+ END
+     $serverrow = <<"END";
+       <tr>
+        <td  align="left" valign="top">
+         <small><b>$lt{'serv'}:&nbsp;</b></small>
+        </td>
+        <td align="left" valign="top">
+         <small><tt>&nbsp;$lonhost ($role)</tt></small>
+        </td>
+       </tr>
+ END
+     if ($loadlim) {
+         $loadrow = <<"END";
+       <tr>
+        <td align="left" valign="top">
+         <small><b>$lt{'load'}:&nbsp;</b></small>
+        </td>
+        <td align="left" valign="top">
+         <small><tt>&nbsp;$loadpercent $lt{'perc'}</tt></small>
+        </td>
+       </tr>
+ END
+     }
+     if ($uloadlim) {
+         $userloadrow = <<"END";
+       <tr>
+        <td align="left" valign="top">
+         <small><b>$lt{'userload'}:&nbsp;</b></small>
+        </td>
+        <td align="left" valign="top">
+         <small><tt>&nbsp;$userloadpercent $lt{'perc'}</tt></small>
+        </td>
+       </tr>
+ END
+     }
+     if (($version ne '') && ($version ne '<!-- VERSION -->')) {
+         $versionrow = <<"END";
+       <tr>
+        <td colspan="2" align="left">
+         <small>$version</small>
+        </td>
+       </tr>
+ END
+     }
+     $r->print(<<ENDDOCUMENT);
+     <div style="float: left;">
+      <table border="0" cellspacing="0" cellpadding="0">
+ $domainrow
+ $serverrow
+ $loadrow
+ $userloadrow
+ $versionrow
+      </table>
+     </div>
+     <div style="float: right;">
+     $domainlogo
+     </div>
+     <br style="clear:both;" />
+  </div>
+ $in_frame_js
+ <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
+ ENDDOCUMENT
+     my %endargs = ( 'noredirectlink' => 1, );
+     $r->print(&Apache::loncommon::end_page(\%endargs));
+     return OK;
+ }
+ sub check_loginvia {
+     my ($domain,$lonhost,$lonidsdir,$balcookie) = @_;
+     if ($domain eq '' || $lonhost eq '' || $lonidsdir eq '') {
+         return;
+     }
+     my %domconfhash = &Apache::loncommon::get_domainconf($domain);
+     my $loginvia = $domconfhash{$domain.'.login.loginvia_'.$lonhost};
+     my $loginvia_exempt = $domconfhash{$domain.'.login.loginvia_exempt_'.$lonhost};
+     my $output;
+     if ($loginvia ne '') {
+         my $noredirect;
+         my $ip = &Apache::lonnet::get_requestor_ip();
+         if ($ip eq '127.0.0.1') {
+             $noredirect = 1;
+         } else {
+             if ($loginvia_exempt ne '') {
+                 my @exempt = split(',',$loginvia_exempt);
+                 if (grep(/^\Q$ip\E$/,@exempt)) {
+                     $noredirect = 1;
+                 }
+             }
+         }
+         unless ($noredirect) {
+             my ($newhost,$path);
+             if ($loginvia =~ /:/) {
+                 ($newhost,$path) = split(':',$loginvia);
+             } else {
+                 $newhost = $loginvia;
+             }
+             if ($newhost ne $lonhost) {
+                 if (&Apache::lonnet::hostname($newhost) ne '') {
+                     if ($balcookie) {
+                         my ($balancer,$cookie) = split(/:/,$balcookie);
+                         if ($cookie =~ /^($match_domain)_($match_username)_([a-f0-9]+)$/) {
+                             my ($udom,$uname,$cookieid) = ($1,$2,$3);
+                             unless (&Apache::lonnet::delbalcookie($cookie,$balancer) eq 'ok') {
+                                 if ((-d $lonidsdir) && (opendir(my $dh,$lonidsdir))) {
+                                     while (my $filename=readdir($dh)) {
+                                         if ($filename=~/^(\Q$uname\E_\d+_\Q$udom\E_$match_lonid)\.id$/) {
+                                             my $handle = $1;
+                                             my %hash =
+                                                 &Apache::lonnet::get_sessionfile_vars($handle,$lonidsdir,
+                                                                                      ['request.balancercookie',
+                                                                                       'user.linkedenv']);
+                                             if ($hash{'request.balancercookie'} eq "$balancer:$cookieid") {
+                                                 if (unlink("$lonidsdir/$filename")) {
+                                                     if (($hash{'user.linkedenv'} =~ /^[a-f0-9]+_linked$/) &&
+                                                         (-l "$lonidsdir/$hash{'user.linkedenv'}.id") &&
+                                                         (readlink("$lonidsdir/$hash{'user.linkedenv'}.id") eq "$lonidsdir/$filename")) {
+                                                         unlink("$lonidsdir/$hash{'user.linkedenv'}.id");
+                                                     }
+                                                 }
+                                             }
+                                             last;
+                                         }
+                                     }
+                                     closedir($dh);
+                                 }
+                             }
+                         }
+                     }
+                     $output = &redirect_page($newhost,$path);
+                 }
+             }
+         }
+     }
+     return $output;
+ }
+ sub redirect_page {
+     my ($desthost,$path) = @_;
+     my $hostname = &Apache::lonnet::hostname($desthost);
+     my $protocol = $Apache::lonnet::protocol{$desthost};
+     $protocol = 'http' if ($protocol ne 'https');
+     unless ($path =~ m{^/}) {
+         $path = '/'.$path;
+     }
+     my $url = $protocol.'://'.$hostname.$path;
+     my $args = {};
+     if ($env{'form.firsturl'} =~ m{^/tiny/$match_domain/\w+$}) {
+         $url = $protocol.'://'.$hostname.$env{'form.firsturl'};
+         if (($env{'form.ltoken'}) || ($env{'form.linkprot'} ne '') ||
+             ($env{'form.linkkey'} ne '')) {
+             my %link_info;
+             if ($env{'form.ltoken'}) {
+                 %link_info = &Apache::lonnet::tmpget($env{'form.ltoken'});
+                 &Apache::lonnet::tmpdel($env{'form.ltoken'});
+                 $args->{'only_body'} = 1;
+             } elsif ($env{'form.linkprot'}) {
+                 $link_info{'linkprot'} = $env{'form.linkprot'};
+                 foreach my $item ('linkprotuser','linkprotexit') {
+                     if ($env{'form.'.$item}) {
+                         $link_info{$item} = $env{'form.'.$item};
+                     }
+                 }
+                 $args->{'only_body'} = 1;
+             } elsif ($env{'form.linkkey'} ne '') {
+                 $link_info{'linkkey'} = $env{'form.linkkey'};
+             }
+             my $token = &Apache::lonnet::tmpput(\%link_info,$desthost,'link');
+             unless (($token eq 'con_lost') || ($token eq 'refused') ||
+                     ($token eq 'unknown_cmd') || ($token eq 'no_such_host')) {
+                 $url .= '?ltoken='.$token;
+             }
+         }
+     } else {
+         my $querystring;
+         if ($env{'form.firsturl'} ne '') {
+             if ($env{'form.firsturl'} =~ /[^\x00-\xFF]/) {
+                 $querystring = &uri_escape_utf8($env{'form.firsturl'});
+             } else {
+                 $querystring = &uri_escape($env{'form.firsturl'});
+             }
+             $querystring = &HTML::Entities::encode($querystring,"'");
+             $querystring = '?firsturl='.$querystring;
+         }
+         if ($env{'form.ltoken'}) {
+             my %link_info = &Apache::lonnet::tmpget($env{'form.ltoken'});
+             &Apache::lonnet::tmpdel($env{'form.ltoken'});
+             my $token = &Apache::lonnet::tmpput(\%link_info,$desthost,'link');
+             unless (($token eq 'con_lost') || ($token eq 'refused') || ($token =~ /^error:/) ||
+                     ($token eq 'unknown_cmd') || ($token eq 'no_such_host')) {
+                 unless (($path eq '/adm/roles') || ($path eq '/adm/login')) {
+                     $url = $protocol.'://'.$hostname.'/adm/roles';
+                 }
+                 $querystring .= (($querystring =~/^\?/)?'&amp;':'?') . 'ttoken='.$token;
+             }
+         }
+         $url .= $querystring;
+     }
+     $args->{'redirect'} = [0,$url];
+     my $start_page = &Apache::loncommon::start_page('Switching Server ...',undef,$args);
+     my $end_page   = &Apache::loncommon::end_page();
+     return $start_page.$end_page;
+ }
+ sub contactdisplay {
+     my ($lt,$servadm,$showadminmail,$authdomain,$helpdeskscript,$showhelpdesk,
+         $possdoms) = @_;
+     my $contactblock;
+     my $origmail;
+     if (ref($possdoms) eq 'ARRAY') {
+         if (grep(/^\Q$authdomain\E$/,@{$possdoms})) {
+             $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'};
+         }
+     }
+     my $requestmail =
+         &Apache::loncommon::build_recipient_list(undef,'helpdeskmail',
+                                                  $authdomain,$origmail);
+     unless ($showhelpdesk eq '0') {
+         if ($requestmail =~ m/[^\@]+\@[^\@]+/) {
+             $showhelpdesk = 1;
+         } else {
+             $showhelpdesk = 0;
+         }
+     }
+     if ($servadm && $showadminmail) {
+         $contactblock .= $$lt{'servadm'}.':<br />'.
+                          '<tt>'.$servadm.'</tt><br />';
+     }
+     if ($showhelpdesk) {
+         $contactblock .= '<a href="javascript:helpdesk()">'.$lt->{'helpdesk'}.'</a><br />';
+         my $thisurl = &escape('/adm/login');
+         $$helpdeskscript = <<"ENDSCRIPT";
+ <script type="text/javascript">
+ // <![CDATA[
+ function helpdesk() {
+     var possdom = document.client.udom.value;
+     var codedom = possdom.replace( new RegExp("[^A-Za-z0-9.\\-]","g"),'');
+     if (codedom == '') {
+         codedom = "$authdomain";
+     }
+     var querystr = "origurl=$thisurl&codedom="+codedom;
+     document.location.href = "/adm/helpdesk?"+querystr;
+     return;
+ }
+ // ]]>
+ </script>
+ ENDSCRIPT
+     }
+     return $contactblock;
+ }
+ sub forgotpwdisplay {
+     my (%lt) = @_;
+     my $prompt_for_resetpw = 1;
+     if ($prompt_for_resetpw) {
+         return '<a href="/adm/resetpw">'.$lt{'forgotpw'}.'</a>';
+     }
+     return;
+ }
+ sub coursecatalog_link {
+     my ($linkname) = @_;
+     return <<"END";
+       <a href="/adm/coursecatalog">$linkname</a>
+ END
+ }
+ sub newuser_link {
+     my ($linkname) = @_;
+     return '<a href="/adm/createaccount">'.$linkname.'</a>';
+ }
+ sub decode_token {
+     my ($info) = @_;
+     my ($firsturl,@rest)=split(/\&/,$info);
+     my %form;
+     if ($firsturl ne '') {
+         $form{'firsturl'} = &unescape($firsturl);
+     }
+     foreach my $item (@rest) {
+         my ($key,$value) = split(/=/,$item);
+         $form{$key} = &unescape($value);
+     }
+     return %form;
+ }
+;
+ __END__

FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>

500 Internal Server Error

Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator at root@localhost to inform them of the time this error occurred, and the actions you performed just before this error.

More information about this error may be available in the server error log.

Removed from v.1.158.2.2
changed lines
	Added in v.1.201