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Diff for /loncom/auth/lonlogin.pm between versions 1.90 and 1.172

version 1.90, 2007/04/03 18:47:25 version 1.172, 2018/01/12 15:26:39
Line 1 Line 1
 # The LearningOnline Network  # The LearningOnline Network
 # Login Screen  # Login Screen
 #  #
 # $Id$  # $Id$
 #  #
 # Copyright Michigan State University Board of Trustees  # Copyright Michigan State University Board of Trustees
 #  #
 # This file is part of the LearningOnline Network with CAPA (LON-CAPA).  # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
 #  #
 # LON-CAPA is free software; you can redistribute it and/or modify  # 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  # it under the terms of the GNU General Public License as published by
 # the Free Software Foundation; either version 2 of the License, or  # the Free Software Foundation; either version 2 of the License, or
 # (at your option) any later version.  # (at your option) any later version.
 #  #
 # LON-CAPA is distributed in the hope that it will be useful,  # LON-CAPA is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of  # but WITHOUT ANY WARRANTY; without even the implied warranty of
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 # GNU General Public License for more details.  # GNU General Public License for more details.
 #  #
 # You should have received a copy of the GNU General Public License  # You should have received a copy of the GNU General Public License
 # along with LON-CAPA; if not, write to the Free Software  # along with LON-CAPA; if not, write to the Free Software
 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA  # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 #  #
 # /home/httpd/html/adm/gpl.txt  # /home/httpd/html/adm/gpl.txt
 #  #
 # http://www.lon-capa.org/  # http://www.lon-capa.org/
 #  #
   
 package Apache::lonlogin;  package Apache::lonlogin;
   
 use strict;  use strict;
 use Apache::Constants qw(:common);  use Apache::Constants qw(:common);
 use CGI::Cookie();  use Apache::File ();
 use Apache::File ();  use Apache::lonnet;
 use Apache::lonnet;  use Apache::loncommon();
 use Apache::loncommon();  use Apache::lonauth();
 use Apache::lonauth();  use Apache::lonlocal;
 use Apache::lonlocal;  use Apache::migrateuser();
 use Apache::migrateuser();  use lib '/home/httpd/lib/perl/';
 use lib '/home/httpd/lib/perl/';  use LONCAPA;
 use LONCAPA;  use CGI::Cookie();
     
 sub handler {  sub handler {
     my $r = shift;      my $r = shift;
   
     &Apache::loncommon::get_unprocessed_cgi      &Apache::loncommon::get_unprocessed_cgi
  (join('&',$ENV{'QUERY_STRING'},$env{'request.querystring'},   (join('&',$ENV{'QUERY_STRING'},$env{'request.querystring'},
       $ENV{'REDIRECT_QUERY_STRING'}),        $ENV{'REDIRECT_QUERY_STRING'}),
  ['interface','username','domain','firsturl','localpath','localres',   ['interface','username','domain','firsturl','localpath','localres',
   'token']);    'token','role','symb','iptoken']);
       if (!defined($env{'form.firsturl'})) {
 # -- check if they are a migrating user          &Apache::lonacc::get_posted_cgi($r,['firsturl']);
     if (defined($env{'form.token'})) {      }
  return &Apache::migrateuser::handler($r);      if (!defined($env{'form.firsturl'})) {
     }          if ($ENV{'REDIRECT_URL'} =~ m{^/+tiny/+$LONCAPA::match_domain/+\w+$}) {
               $env{'form.firsturl'} = $ENV{'REDIRECT_URL'};
     &Apache::loncommon::no_cache($r);          }
     &Apache::lonlocal::get_language_handle($r);      }
     &Apache::loncommon::content_type($r,'text/html');  
     $r->send_http_header;  # -- check if they are a migrating user
     return OK if $r->header_only;      if (defined($env{'form.token'})) {
    return &Apache::migrateuser::handler($r);
       }
 # Are we re-routing?  
     if (-e '/home/httpd/html/lon-status/reroute.txt') {  # For "public user" - remove any exising "public" cookie, as user really wants to log-in
  &Apache::lonauth::reroute($r);      my ($handle,$lonidsdir,$expirepub,$userdom);
  return OK;      unless ($r->header_only) {
     }          $handle = &Apache::lonnet::check_for_valid_session($r,'lonID',undef,\$userdom);
           if ($handle ne '') {
               $lonidsdir=$r->dir_config('lonIDsDir');
 # -------------------------------- Prevent users from attempting to login twice              if ($handle=~/^publicuser\_/) {
     my %cookies=CGI::Cookie->parse($r->header_in('Cookie'));                  unlink($r->dir_config('lonIDsDir')."/$handle.id");
     my $lonid=$cookies{'lonID'};                  undef($handle);
     my $cookie;                  undef($userdom);
     if ($lonid) {                  $expirepub = 1;
  my $handle=&LONCAPA::clean_handle($lonid->value);              }
         my $lonidsdir=$r->dir_config('lonIDsDir');          }
  if (-e "$lonidsdir/$handle.id") {      }
 # Is there an existing token file?  
     if ($handle=~/^publicuser\_/) {      &Apache::loncommon::no_cache($r);
 # For "public user" - remove it, we apparently really want to login      &Apache::lonlocal::get_language_handle($r);
  unlink("$lonidsdir/$handle.id");      &Apache::loncommon::content_type($r,'text/html');
     } elsif ($handle ne '') {      if ($expirepub) {
 # Indeed, a valid token is found          my $c = new CGI::Cookie(-name    => 'lonPubID',
  my $start_page =                                   -value   => '',
     &Apache::loncommon::start_page('Already logged in');                                  -expires => '-10y',);
  my $end_page =           $r->header_out('Set-cookie' => $c);
     &Apache::loncommon::end_page();      } elsif (($handle eq '') && ($userdom ne '')) {
  $r->print(<<ENDFAILED);          my $c = new CGI::Cookie(-name    => 'lonID',
 $start_page                                  -value   => '',
 <h1>You are already logged in</h1>                                  -expires => '-10y',);
 <p>Please either <a href="/adm/roles">continue the current session</a> or          $r->headers_out->add('Set-cookie' => $c);
 <a href="/adm/logout">logout</a>.</p>      }
 <p>      $r->send_http_header;
 <a href="/adm/loginproblems.html">Problems?</a></p>      return OK if $r->header_only;
 $end_page  
 ENDFAILED  
                 return OK;  # Are we re-routing?
      }        my $londocroot = $r->dir_config('lonDocRoot');
  }      if (-e "$londocroot/lon-status/reroute.txt") {
     }   &Apache::lonauth::reroute($r);
    return OK;
 # ---------------------------------------------------- No valid token, continue      }
   
  # ---------------------------- Not possible to really login to domain "public"  #
     if ($env{'form.domain'} eq 'public') {  # If browser sent an old cookie for which the session file had been removed
  $env{'form.domain'}='';  # check if configuration for user's domain has a portal URL set.  If so
  $env{'form.username'}='';  # switch user's log-in to the portal.
     }  #
 # ----------------------------------------------------------- Process Interface  
     $env{'form.interface'}=~s/\W//g;      if (($handle eq '') && ($userdom ne '')) {
           my %domdefaults = &Apache::lonnet::get_domain_defaults($userdom);
     my $textbrowsers=$r->dir_config('lonTextBrowsers');          if ($domdefaults{'portal_def'} =~ /^https?\:/) {
     my $httpbrowser=$ENV{"HTTP_USER_AGENT"};              my $start_page = &Apache::loncommon::start_page('Switching Server ...',undef,
                                                 {'redirect' => [0,$domdefaults{'portal_def'}],});
     foreach (split(/\:/,$textbrowsers)) {              my $end_page   = &Apache::loncommon::end_page();
  if ($httpbrowser=~/$_/i) {              $r->print($start_page.$end_page);
     $env{'form.interface'}='textual';              return OK;
         }          }
     }      }
   
     my $fullgraph=($env{'form.interface'} ne 'textual');      $env{'form.firsturl'} =~ s/(`)/'/g;
     my $port_to_use=$r->dir_config('lonhttpdPort');  
     if (!defined($port_to_use)) {  # -------------------------------- Prevent users from attempting to login twice
  $port_to_use='8080';      if ($handle ne '') {
     }          &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
     my $iconpath= 'http://'.$ENV{'HTTP_HOST'}.':'.$port_to_use.   my $start_page =
                   $r->dir_config('lonIconsURL');      &Apache::loncommon::start_page('Already logged in');
     my $domain = &Apache::lonnet::default_login_domain();   my $end_page =
     if (($env{'form.domain'}) &&       &Apache::loncommon::end_page();
  (&Apache::lonnet::domain($env{'form.domain'},'description'))) {          my $dest = '/adm/roles';
  $domain=$env{'form.domain'};          if ($env{'form.firsturl'} ne '') {
     }              $dest = $env{'form.firsturl'};
     my $role    = $r->dir_config('lonRole');          }
     my $loadlim = $r->dir_config('lonLoadLim');   $r->print(
     my $servadm = $r->dir_config('lonAdmEMail');                    $start_page
     my $lonhost = $r->dir_config('lonHostID');                   .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>'
     my $tabdir  = $r->dir_config('lonTabDir');                   .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].',
     my $include = $r->dir_config('lonIncludes');                    '<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>').'</p>'
     my $expire  = $r->dir_config('lonExpire');                   .$end_page
     my $version = $r->dir_config('lonVersion');                   );
     my $host_name = &Apache::lonnet::hostname($lonhost);          return OK;
       }
 # --------------------------------------------- Default values for login fields  
   # ---------------------------------------------------- No valid token, continue
     my $authusername=($env{'form.username'}?$env{'form.username'}:'');  
     my $authdomain=($env{'form.domain'}?$env{'form.domain'}:$domain);  # ---------------------------- Not possible to really login to domain "public"
       if ($env{'form.domain'} eq 'public') {
 # ---------------------------------------------------------- Determine own load   $env{'form.domain'}='';
     my $loadavg;   $env{'form.username'}='';
     {      }
  my $loadfile=Apache::File->new('/proc/loadavg');  
  $loadavg=<$loadfile>;  # ------ Is this page requested because /adm/migrateuser detected an IP change?
     }      my %sessiondata;
     $loadavg =~ s/\s.*//g;      if ($env{'form.iptoken'}) {
     my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);          %sessiondata = &Apache::lonnet::tmpget($env{'form.iptoken'});
     my $userloadpercent=&Apache::lonnet::userload();          unless ($sessiondata{'sessionserver'}) {
               my $delete = &Apache::lonnet::tmpdel($env{'form.iptoken'});
 # ------------------------------------------------------- Do the load balancing              delete($env{'form.iptoken'});
     my $otherserver= &Apache::lonnet::absolute_url($host_name);          }
     my $firsturl=      }
     ($env{'request.firsturl'}?$env{'request.firsturl'}:$env{'form.firsturl'});  # ----------------------------------------------------------- Process Interface
 # ---------------------------------------- Are we access server and overloaded?      $env{'form.interface'}=~s/\W//g;
     if (($role eq 'access') &&  
  (($userloadpercent>100.0)||($loadpercent>100.0))) {      (undef,undef,undef,undef,undef,undef,my $clientmobile) =
         my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent);          &Apache::loncommon::decode_user_agent();
  if ($unloaded) { $otherserver=$unloaded; }  
     }      my $iconpath=
    &Apache::loncommon::lonhttpdurl($r->dir_config('lonIconsURL'));
 # ----------------------------------------------------------- Get announcements  
     my $announcements=&Apache::lonnet::getannounce();      my $lonhost = $r->dir_config('lonHostID');
 # -------------------------------------------------------- Set login parameters      my $domain = &Apache::lonnet::default_login_domain();
       my $defdom = $domain;
     my @hexstr=('0','1','2','3','4','5','6','7',      if ($lonhost ne '') {
                 '8','9','a','b','c','d','e','f');          unless ($sessiondata{'sessionserver'}) {
     my $lkey='';              my $redirect = &check_loginvia($domain,$lonhost);
     for (0..7) {              if ($redirect) {
         $lkey.=$hexstr[rand(15)];                  $r->print($redirect);
     }                  return OK;
               }
     my $ukey='';          }
     for (0..7) {      }
         $ukey.=$hexstr[rand(15)];  
     }      if (($sessiondata{'domain'}) &&
           (&Apache::lonnet::domain($env{'form.domain'},'description'))) {
     my $lextkey=hex($lkey);          $domain=$sessiondata{'domain'};
     if ($lextkey>2147483647) { $lextkey-=4294967296; }      } elsif (($env{'form.domain'}) &&
    (&Apache::lonnet::domain($env{'form.domain'},'description'))) {
     my $uextkey=hex($ukey);   $domain=$env{'form.domain'};
     if ($uextkey>2147483647) { $uextkey-=4294967296; }      }
   
 # -------------------------------------------------------- Store away log token      my $role    = $r->dir_config('lonRole');
     my $logtoken=Apache::lonnet::reply(      my $loadlim = $r->dir_config('lonLoadLim');
        'tmpput:'.$ukey.$lkey.'&'.$firsturl,      my $uloadlim= $r->dir_config('lonUserLoadLim');
        $lonhost);      my $servadm = $r->dir_config('lonAdmEMail');
       my $tabdir  = $r->dir_config('lonTabDir');
 # ------------------- If we cannot talk to ourselves, we are in serious trouble      my $include = $r->dir_config('lonIncludes');
       my $expire  = $r->dir_config('lonExpire');
     if ($logtoken eq 'con_lost') {      my $version = $r->dir_config('lonVersion');
         my $spares='';      my $host_name = &Apache::lonnet::hostname($lonhost);
  my $last;  
         foreach my $hostid (sort  # --------------------------------------------- Default values for login fields
     {     
  &Apache::lonnet::hostname($a) cmp      my ($authusername,$authdomain);
     &Apache::lonnet::hostname($b);      if ($sessiondata{'username'}) {
     }          $authusername=$sessiondata{'username'};
     keys(%Apache::lonnet::spareid)) {      } else {
             next if ($hostid eq $lonhost);          $env{'form.username'} = &Apache::loncommon::cleanup_html($env{'form.username'});
     my $hostname = &Apache::lonnet::hostname($hostid);          $authusername=($env{'form.username'}?$env{'form.username'}:'');
     next if ($last eq $hostname);      }
             $spares.='<br /><font size="+1"><a href="http://'.      if ($sessiondata{'domain'}) {
                 $hostname.          $authdomain=$sessiondata{'domain'};
                 '/adm/login?domain='.$authdomain.'">'.      } else {
                 $hostname.'</a>'.          $env{'form.domain'} = &Apache::loncommon::cleanup_html($env{'form.domain'});
                 ' (preferred)</font>'.$/;          $authdomain=($env{'form.domain'}?$env{'form.domain'}:$domain);
     $last=$hostname;      }
         }  
         $spares.= '<br />';  # ---------------------------------------------------------- Determine own load
  my %all_hostnames = &Apache::lonnet::all_hostnames();      my $loadavg;
         foreach my $hostid (sort      {
     {   my $loadfile=Apache::File->new('/proc/loadavg');
  &Apache::lonnet::hostname($a) cmp   $loadavg=<$loadfile>;
     &Apache::lonnet::hostname($b);      }
     }      $loadavg =~ s/\s.*//g;
     keys(%all_hostnames)) {  
             next if ($hostid eq $lonhost || $Apache::lonnet::spareid{$hostid});      my ($loadpercent,$userloadpercent);
     my $hostname = &Apache::lonnet::hostname($hostid);      if ($loadlim) {
             next if ($last eq $hostname);          $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);
             $spares.='<br /><a href="http://'.      }
                 $hostname.      if ($uloadlim) {
                 '/adm/login?domain='.$authdomain.'">'.          $userloadpercent=&Apache::lonnet::userload();
                 $hostname.'</a>';      }
     $last=$hostname;  
         }      my $firsturl=
  $r->print(<<ENDTROUBLE);      ($env{'request.firsturl'}?$env{'request.firsturl'}:$env{'form.firsturl'});
 <html>  
 <head><title>The LearningOnline Network with CAPA</title></head>  # ----------------------------------------------------------- Get announcements
 <body bgcolor="#FFFFFF">      my $announcements=&Apache::lonnet::getannounce();
 <img src="/adm/lonKaputt/lonlogo_broken.gif" align="right" />  # -------------------------------------------------------- Set login parameters
 <h3>This LON-CAPA server is temporarily not available for login</h3>  
 <p>Please attempt to login to one of the following servers:</p>$spares      my @hexstr=('0','1','2','3','4','5','6','7',
 </body>                  '8','9','a','b','c','d','e','f');
 </html>      my $lkey='';
 ENDTROUBLE      for (0..7) {
         return OK;          $lkey.=$hexstr[rand(15)];
     }      }
   
 # ----------------------------------------------- Apparently we are in business      my $ukey='';
     $servadm=~s/\,/\<br \/\>/g;      for (0..7) {
           $ukey.=$hexstr[rand(15)];
 # --------------------------------------------------- Print login screen header      }
     $r->print(<<ENDHEADER);  
 <html>      my $lextkey=hex($lkey);
 <head>      if ($lextkey>2147483647) { $lextkey-=4294967296; }
 <meta HTTP-EQUIV="Refresh" CONTENT="$expire; url=/adm/roles" />  
 <title>The LearningOnline Network with CAPA Login</title>      my $uextkey=hex($ukey);
 </head>      if ($uextkey>2147483647) { $uextkey-=4294967296; }
 ENDHEADER  
 # ---------------------------------------------------- Serve out DES JavaScript  # -------------------------------------------------------- Store away log token
     {      my $tokenextras;
  my $jsh=Apache::File->new($include."/londes.js");      if ($env{'form.role'}) {
         $r->print(<$jsh>);          $tokenextras = '&role='.&escape($env{'form.role'});
     }      }
       if ($env{'form.symb'}) {
 # ----------------------------------------------------------- Front page design          if (!$tokenextras) {
     my $pgbg=              $tokenextras = '&';
       ($fullgraph?&Apache::loncommon::designparm('login.pgbg',$domain):'#FFFFFF');          }
     my $font=          $tokenextras .= '&symb='.&escape($env{'form.symb'});
       ($fullgraph?&Apache::loncommon::designparm('login.font',$domain):'#000000');      }
     my $link=      if ($env{'form.iptoken'}) {
       ($fullgraph?&Apache::loncommon::designparm('login.link',$domain):'#0000FF');          if (!$tokenextras) {
     my $vlink=              $tokenextras = '&&';
       ($fullgraph?&Apache::loncommon::designparm('login.vlink',$domain):'#0000FF');          }
     my $alink=&Apache::loncommon::designparm('login.alink',$domain);          $tokenextras .= '&iptoken='.&escape($env{'form.iptoken'});
     my $mainbg=      }
       ($fullgraph?&Apache::loncommon::designparm('login.mainbg',$domain):'#FFFFFF');      my $logtoken=Apache::lonnet::reply(
     my $sidebg=         'tmpput:'.$ukey.$lkey.'&'.$firsturl.$tokenextras,
       ($fullgraph?&Apache::loncommon::designparm('login.sidebg',$domain):'#FFFFFF');         $lonhost);
     my $logo=&Apache::loncommon::designparm('login.logo',$domain);  
     my $img=&Apache::loncommon::designparm('login.img',$domain);  # -- If we cannot talk to ourselves, or hostID does not map to a hostname
     my $domainlogo=&Apache::loncommon::domainlogo($domain);  #    we are in serious trouble
     my $showadminmail=&Apache::loncommon::designparm('login.adminmail',                                                      $domain);  
     my $showcoursecat =      if (($logtoken eq 'con_lost') || ($logtoken eq 'no_such_host')) {
         &Apache::loncommon::designparm('login.coursecatalog',$domain);          if ($logtoken eq 'no_such_host') {
               &Apache::lonnet::logthis('No valid logtoken for log-in page -- unable to determine hostname for hostID: '.$lonhost.'. Check entry in hosts.tab');
           }
 # ----------------------------------------------------------------------- Texts          my $spares='';
    my $last;
 my %lt=&Apache::lonlocal::texthash(          foreach my $hostid (sort
   'un'  => 'Username',      {
   'pw'  => 'Password',   &Apache::lonnet::hostname($a) cmp
   'dom' => 'Domain',      &Apache::lonnet::hostname($b);
   'perc' => 'percent',      }
   'load' => 'Load',      keys(%Apache::lonnet::spareid)) {
                   'userload' => 'User Load',              next if ($hostid eq $lonhost);
                   'about'  => 'About LON-CAPA',      my $hostname = &Apache::lonnet::hostname($hostid);
                   'access' => 'Accessibility Options',      next if (($last eq $hostname) || ($hostname eq ''));
                   'catalog' => 'Course Catalog',              $spares.='<br /><font size="+1"><a href="http://'.
   'auth' => 'userauthentication.gif',                  $hostname.
   'log' => 'Log in',                  '/adm/login?domain='.$authdomain.'">'.
   'help' => 'Log-in Help',                  $hostname.'</a>'.
   'serv' => 'Server',                  ' '.&mt('(preferred)').'</font>'.$/;
                   'servadm' => 'Server Administration',      $last=$hostname;
                   'helpdesk' => 'Contact Helpdesk',          }
                   'forgotpw' => 'Forgot password?');          if ($spares) {
 # -------------------------------------------------- Change password field name              $spares.= '<br />';
     my $now=time;          }
     my $forgotpw = &forgotpwdisplay(%lt);          my %all_hostnames = &Apache::lonnet::all_hostnames();
     my $loginhelp = &loginhelpdisplay(%lt);          foreach my $hostid (sort
 # ---------------------------------------------------------- Serve rest of page      {
     $r->print(<<ENDSCRIPT);   &Apache::lonnet::hostname($a) cmp
       &Apache::lonnet::hostname($b);
 <body bgcolor="$pgbg" text="$font" link="$link" vlink="$vlink" alink="$alink"      }
   topmargin=0 leftmargin=0 marginwidth=0 marginheight=0>      keys(%all_hostnames)) {
               next if ($hostid eq $lonhost || $Apache::lonnet::spareid{$hostid});
  <script language="JavaScript">              my $hostname = &Apache::lonnet::hostname($hostid);
     function send()              next if (($last eq $hostname) || ($hostname eq ''));
     {              $spares.='<br /><a href="http://'.
  this.document.server.elements.uname.value               $hostname.
        =this.document.client.elements.uname.value;               '/adm/login?domain='.$authdomain.'">'.
                $hostname.'</a>';
         this.document.server.elements.udom.value              $last=$hostname;
        =this.document.client.elements.udom.value;           }
            $r->print(
         this.document.server.elements.imagesuppress.value     '<html>'
        =this.document.client.elements.imagesuppress.checked;    .'<head><title>'
     .&mt('The LearningOnline Network with CAPA')
         this.document.server.elements.embedsuppress.value    .'</title></head>'
        =this.document.client.elements.embedsuppress.checked;    .'<body bgcolor="#FFFFFF">'
     .'<h1>'.&mt('The LearningOnline Network with CAPA').'</h1>'
         this.document.server.elements.appletsuppress.value    .'<img src="/adm/lonKaputt/lonlogo_broken.gif" align="right" />'
        =this.document.client.elements.appletsuppress.checked;    .'<h3>'.&mt('This LON-CAPA server is temporarily not available for login.').'</h3>');
           if ($spares) {
         this.document.server.elements.fontenhance.value              $r->print('<p>'.&mt('Please attempt to login to one of the following servers:')
        =this.document.client.elements.fontenhance.checked;                       .'</p>'
                        .$spares);
         this.document.server.elements.blackwhite.value          }
        =this.document.client.elements.blackwhite.checked;          $r->print('</body>'
                    .'</html>'
         this.document.server.elements.remember.value          );
        =this.document.client.elements.remember.checked;          return OK;
       }
         uextkey=this.document.client.elements.uextkey.value;  
         lextkey=this.document.client.elements.lextkey.value;  # ----------------------------------------------- Apparently we are in business
         initkeys();      $servadm=~s/\,/\<br \/\>/g;
   
         this.document.server.elements.upass0.value  # ----------------------------------------------------------- Front page design
     =crypted(this.document.client.elements.upass$now.value.substr(0,15));      my $pgbg=&Apache::loncommon::designparm('login.pgbg',$domain);
  this.document.server.elements.upass1.value      my $font=&Apache::loncommon::designparm('login.font',$domain);
     =crypted(this.document.client.elements.upass$now.value.substr(15,15));      my $link=&Apache::loncommon::designparm('login.link',$domain);
  this.document.server.elements.upass2.value      my $vlink=&Apache::loncommon::designparm('login.vlink',$domain);
     =crypted(this.document.client.elements.upass$now.value.substr(30,15));      my $alink=&Apache::loncommon::designparm('login.alink',$domain);
       my $mainbg=&Apache::loncommon::designparm('login.mainbg',$domain);
         this.document.client.elements.uname.value='';      my $loginbox_bg=&Apache::loncommon::designparm('login.sidebg',$domain);
         this.document.client.elements.upass$now.value='';      my $loginbox_header_bgcol=&Apache::loncommon::designparm('login.bgcol',$domain);
       my $loginbox_header_textcol=&Apache::loncommon::designparm('login.textcol',$domain);
         this.document.server.submit();      my $logo=&Apache::loncommon::designparm('login.logo',$domain);
  return false;      my $img=&Apache::loncommon::designparm('login.img',$domain);
     }      my $domainlogo=&Apache::loncommon::domainlogo($domain);
  </script>      my $showbanner = 1;
 ENDSCRIPT      my $showmainlogo = 1;
       if (defined(&Apache::loncommon::designparm('login.showlogo_img',$domain))) {
     if ($fullgraph) {          $showbanner = &Apache::loncommon::designparm('login.showlogo_img',$domain);
  $r->print(      }
   '<table width="100%" cellpadding=0 cellspacing=0 border=0>');      if (defined(&Apache::loncommon::designparm('login.showlogo_logo',$domain))) {
     }          $showmainlogo = &Apache::loncommon::designparm('login.showlogo_logo',$domain);
       }
     $r->print(<<ENDSERVERFORM);      my $showadminmail;
   <form name="server" action="$otherserver/adm/authenticate" method="post" target="_top">      my @possdoms = &Apache::lonnet::current_machine_domains();
    <input type="hidden" name="logtoken" value="$logtoken" />      if (grep(/^\Q$domain\E$/,@possdoms)) {
    <input type="hidden" name="serverid" value="$lonhost" />          $showadminmail=&Apache::loncommon::designparm('login.adminmail',$domain);
    <input type="hidden" name="interface" value="$env{'form.interface'}" />      }
    <input type="hidden" name="uname" value="" />      my $showcoursecat =
    <input type="hidden" name="upass0" value="" />          &Apache::loncommon::designparm('login.coursecatalog',$domain);
    <input type="hidden" name="upass1" value="" />      my $shownewuserlink =
    <input type="hidden" name="upass2" value="" />          &Apache::loncommon::designparm('login.newuser',$domain);
    <input type="hidden" name="udom" value="" />      my $showhelpdesk =
    <input type="hidden" name="imagesuppress"  value="" />          &Apache::loncommon::designparm('login.helpdesk',$domain);
    <input type="hidden" name="appletsuppress"  value="" />      my $now=time;
    <input type="hidden" name="embedsuppress"  value="" />      my $js = (<<ENDSCRIPT);
    <input type="hidden" name="fontenhance"  value="" />  
    <input type="hidden" name="blackwhite"  value="" />  <script type="text/javascript" language="JavaScript">
    <input type="hidden" name="remember"  value="" />  // <![CDATA[
    <input type="hidden" name="localpath" value="$env{'form.localpath'}" />  function send()
    <input type="hidden" name="localres" value="$env{'form.localres'}" />  {
   </form>  this.document.server.elements.uname.value
 ENDSERVERFORM  =this.document.client.elements.uname.value;
     my $coursecatalog;  
     if (!($showcoursecat == 0)) {  this.document.server.elements.udom.value
         $coursecatalog = &coursecatalog_link($lt{'catalog'});  =this.document.client.elements.udom.value;
     }  
     if ($fullgraph) { $r->print(<<ENDTOP);  uextkey=this.document.client.elements.uextkey.value;
   <!-- The LON-CAPA Header -->  lextkey=this.document.client.elements.lextkey.value;
   <tr>  initkeys();
   
    <!-- Row 1 Columns 2-4 -->  if(this.document.server.action.substr(0,5) === 'http:'){
    <td width="100%" height=75 colspan=4 align="left" valign="top" bgcolor="$pgbg"><img src="$img" border=0 alt="The Learning Online Network with CAPA" /></td>      this.document.server.elements.upass0.value
   </tr>          =getCrypted(this.document.client.elements.upass$now.value);
   } else {
   <!-- The gray bar that starts the two table frames -->      this.document.server.elements.upass0.value
   <tr>          =this.document.client.elements.upass$now.value;
   }
    <!-- Row 2 Column 1 -->  
    <td width=182 height=27 bgcolor="$sidebg">&nbsp;</td>  this.document.client.elements.uname.value='';
   this.document.client.elements.upass$now.value='';
    <!-- Row 2 Column 2 -->  
    <td width=27 height=27 align="left" background="$iconpath/filltop.gif"><img src="$iconpath/upperleft.gif" border=0 alt="" /></td>  this.document.server.submit();
   return false;
    <!-- Row 2 Column 3 -->  }
    <td height=27 background="$iconpath/filltop.gif"><img src="$iconpath/filltop.gif" alt="" /></td>  
   function enableInput() {
    <!-- Row 2 Column 4 -->      this.document.client.elements.upass$now.removeAttribute("readOnly");
    <td width=27 height=27 align="right" background="$iconpath/filltop.gif"><img src="$iconpath/upperright.gif" border=0 alt="" /></td>      this.document.client.elements.uname.removeAttribute("readOnly");
   </tr>      this.document.client.elements.udom.removeAttribute("readOnly");
   <tr>      return;
      }
    <!-- A cell that will hold the 'access', 'about', and 'catalog' links -->  
    <!-- Row 3 Column 1 -->  // ]]>
    <td valign="top" height="60" align="left" bgcolor="$sidebg">  </script>
     <table cellpadding="0" cellspacing="2" border="0">  
      <tr>  ENDSCRIPT
       <td>&nbsp;</td>  
       <td><a href="/adm/login?interface=textual"><b>$lt{'access'}</b></a></td>  # --------------------------------------------------- Print login screen header
      </tr>  
      <tr>      my %add_entries = (
       <td>&nbsp;</td>         bgcolor      => "$mainbg",
       <td><a href="/adm/about.html"><b>$lt{'about'}</b></a></td>         text         => "$font",
      </tr>$coursecatalog         link         => "$link",
      <tr>         vlink        => "$vlink",
       <td colspan="2">&nbsp;</td>         alink        => "$alink",
      </tr>                 onload       => 'javascript:enableInput();',);
     </table>  
    </td>      my ($lonhost_in_use,$headextra,$headextra_exempt,@hosts,%defaultdomconf);
    <!-- The shaded space between the two main columns -->      @hosts = &Apache::lonnet::current_machine_ids();
    <!-- Row 3 Column 2 -->      $lonhost_in_use = $lonhost;
    <td width=27 height=60 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td>      if (@hosts > 1) {
           foreach my $hostid (@hosts) {
    <!-- The right main column holding the large LON-CAPA logo-->              if (&Apache::lonnet::host_domain($hostid) eq $defdom) {
    <!-- Rows 3-4 Column 3 -->                  $lonhost_in_use = $hostid;
    <td align="center" valign="top" width="100%" height="100%" bgcolor="$mainbg">                  last;
     <center>              }
      <img src="$logo" alt="" />          }
     </center>      }
    </td>      %defaultdomconf = &Apache::loncommon::get_domainconf($defdom);
       $headextra = $defaultdomconf{$defdom.'.login.headtag_'.$lonhost_in_use};
    <!-- Row 3 Column 4 -->      $headextra_exempt = $defaultdomconf{$domain.'.login.headtag_exempt_'.$lonhost_in_use};
    <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td>      if ($headextra) {
   </tr>          my $omitextra;
   <tr>          if ($headextra_exempt ne '') {
               my @exempt = split(',',$headextra_exempt);
    <!-- The entry form -->              my $ip = $ENV{'REMOTE_ADDR'};
    <!-- Row 4 Column 1 -->              if (grep(/^\Q$ip\E$/,@exempt)) {
    <td align="center" valign="middle" bgcolor="$sidebg">                  $omitextra = 1;
 ENDTOP              }
 } else {          }
     $r->print('<h1>The Learning<i>Online</i> Network with CAPA</h1><h2>Text-based Interface Login</h2>'.$announcements);          unless ($omitextra) {
 }              my $confname = $defdom.'-domainconfig';
     $r->print('<form name="client" onsubmit="return(send())">');              if ($headextra =~ m{^\Q/res/$defdom/$confname/login/headtag/$lonhost_in_use/\E}) {
     unless ($fullgraph) {                  my $extra = &Apache::lonnet::getfile(&Apache::lonnet::filelocation("",$headextra));
         $r->print(<<ENDACCESSOPTIONS);                  unless ($extra eq '-1') {
 <h3>Select Accessibility Options</h3>                      $js .= "\n".$extra."\n";
 <label><input type="checkbox" name="imagesuppress" /> Suppress rendering of images</label><br />                  }
 <label><input type="checkbox" name="appletsuppress" /> Suppress Java applets</label><br />              }
 <label><input type="checkbox" name="embedsuppress" /> Suppress rendering of embedded multimedia</label><br />          }
 <label><input type="checkbox" name="fontenhance" /> Increase font size</label><br />      }
 <label><input type="checkbox" name="blackwhite" /> Switch to black and white mode</label><br />  
 <input type="checkbox" name="remember" /> Remember these settings for next login<hr />      $r->print(&Apache::loncommon::start_page('The LearningOnline Network with CAPA Login',$js,
 ENDACCESSOPTIONS         { 'redirect'       => [$expire,'/adm/roles'],
 } else {   'add_entries' => \%add_entries,
     $r->print(<<ENDNOOPT);   'only_body'   => 1,}));
 <input type="hidden" name="imagesuppress"  value="" />  
 <input type="hidden" name="embedsuppress"  value="" />  # ----------------------------------------------------------------------- Texts
 <input type="hidden" name="appletsuppress"  value="" />  
 <input type="hidden" name="fontenhance"  value="" />      my %lt=&Apache::lonlocal::texthash(
 <input type="hidden" name="blackwhite"  value="" />            'un'       => 'Username',
 <input type="hidden" name="remember"  value="" />            'pw'       => 'Password',
 ENDNOOPT            'dom'      => 'Domain',
 }            'perc'     => 'percent',
     $r->print(<<ENDLOGIN);            'load'     => 'Server Load',
      <input type="hidden" name="lextkey" value="$lextkey">            'userload' => 'User Load',
      <input type="hidden" name="uextkey" value="$uextkey">            'catalog'  => 'Course/Community Catalog',
             'log'      => 'Log in',
      <!-- Start the sub-table for text and input alignment -->            'help'     => 'Log-in Help',
      <table border=0 cellspacing=0 cellpadding=0>            'serv'     => 'Server',
       <tr><td bgcolor="$sidebg" colspan=2><img src="$iconpath/$lt{'auth'}" alt="User Authentication" /></td></tr>            'servadm'  => 'Server Administration',
       <tr>            'helpdesk' => 'Contact Helpdesk',
        <td bgcolor="$mainbg"><br /><font size=-1><b>&nbsp;&nbsp;&nbsp;$lt{'un'}:</b></font></td>            'forgotpw' => 'Forgot password?',
        <td bgcolor="$mainbg"><br /><input type="text" name="uname" size="10" value="$authusername" /></td>            'newuser'  => 'New User?',
       </tr>         );
       <tr>  # -------------------------------------------------- Change password field name
        <td bgcolor="$mainbg"><font size=-1><b>&nbsp;&nbsp;&nbsp;$lt{'pw'}:</b></font></td>  
        <td bgcolor="$mainbg"><input type="password" name="upass$now" size="10" /></td>      my $forgotpw = &forgotpwdisplay(%lt);
       </tr>      $forgotpw .= '<br />' if $forgotpw;
       <tr>      my $loginhelp = &Apache::lonauth::loginhelpdisplay($authdomain);
        <td bgcolor="$mainbg"><font size=-1><b>&nbsp;&nbsp;&nbsp;$lt{'dom'}:</b></font></td>      if ($loginhelp) {
        <td bgcolor="$mainbg"><input type="text" name="udom" size="10" value="$authdomain" /></td>          $loginhelp = '<a href="'.$loginhelp.'">'.$lt{'help'}.'</a><br />';
       </tr>      }
       <tr>  
        <td bgcolor="$mainbg">&nbsp;</td>  # ---------------------------------------------------- Serve out DES JavaScript
        <td bgcolor="$mainbg" valign="bottom" align="center">      {
         <br />      my $jsh=Apache::File->new($include."/londes.js");
         <input type="submit" value="$lt{'log'}" />      $r->print(<$jsh>);
        </td>      }
       </tr>  # ---------------------------------------------------------- Serve rest of page
       <tr>  
        <td bgcolor="$mainbg" valign="bottom" align="left" colspan="2">      $r->print(
         $loginhelp      '<div class="LC_Box"'
         $forgotpw     .' style="margin:0 auto; padding:10px; width:90%; height: auto; background-color:#FFFFFF;">'
        </td>  );
       </tr>  
      </table>      $r->print(<<ENDSERVERFORM);
      <!-- End sub-table -->  <form name="server" action="/adm/authenticate" method="post" target="_top">
     </form>     <input type="hidden" name="logtoken" value="$logtoken" />
 ENDLOGIN     <input type="hidden" name="serverid" value="$lonhost" />
     if ($fullgraph) {     <input type="hidden" name="uname" value="" />
         my $helpdeskscript;     <input type="hidden" name="upass0" value="" />
         my $contactblock = &contactdisplay(\%lt,$servadm,$showadminmail,     <input type="hidden" name="udom" value="" />
                                   $version,$authdomain,\$helpdeskscript);     <input type="hidden" name="localpath" value="$env{'form.localpath'}" />
  $r->print(<<ENDDOCUMENT);     <input type="hidden" name="localres" value="$env{'form.localres'}" />
    </td>    </form>
   ENDSERVERFORM
    <!-- Row 4 Column 2 -->      my $coursecatalog;
    <td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td>      if (($showcoursecat eq '') || ($showcoursecat)) {
           $coursecatalog = &coursecatalog_link($lt{'catalog'}).'<br />';
    <!-- Row 4 Column 3 -->      }
 <td bgcolor="$mainbg">$announcements</td>      my $newuserlink;
       if ($shownewuserlink) {
    <!-- Row 4 Column 4 -->          $newuserlink = &newuser_link($lt{'newuser'}).'<br />';
    <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td>      }
   </tr>      my $logintitle =
   <tr>          '<h2 class="LC_hcell"'
          .' style="background:'.$loginbox_header_bgcol.';'
    <!-- Row 5 Column 1 -->         .' color:'.$loginbox_header_textcol.'">'
    <td bgcolor="$sidebg" valign="middle" align="left">         .$lt{'log'}
      <br />         .'</h2>';
      <table border=0 cellspacing=0 cellpadding=0>  
       <tr>      my $noscript_warning='<noscript><span class="LC_warning"><b>'
        <td bgcolor="$sidebg" align="left" valign="top">                          .&mt('Use of LON-CAPA requires Javascript to be enabled in your web browser.')
         <small><b>&nbsp;&nbsp;&nbsp;$lt{'dom'}:&nbsp;</b></small>                          .'</b></span></noscript>';
        </td>      my $helpdeskscript;
        <td bgcolor="$sidebg" align="left" valign="top">      my $contactblock = &contactdisplay(\%lt,$servadm,$showadminmail,
         <small><tt>&nbsp;$domain</tt></small>                                         $authdomain,\$helpdeskscript,
        </td>                                         $showhelpdesk,\@possdoms);
       </tr>  
       <tr>      my $mobileargs;
        <td bgcolor="$sidebg" align="left" valign="top">      if ($clientmobile) {
         <small><b>&nbsp;&nbsp;&nbsp;$lt{'serv'}:&nbsp;</b></small>          $mobileargs = 'autocapitalize="off" autocorrect="off"';
        </td>      }
        <td bgcolor="$sidebg" align="left" valign="top">      my $loginform=(<<LFORM);
         <small><tt>&nbsp;$lonhost ($role)</tt></small>  <form name="client" action="" onsubmit="return(send())">
        </td>    <input type="hidden" name="lextkey" value="$lextkey" />
       </tr>    <input type="hidden" name="uextkey" value="$uextkey" />
       <tr>    <b><label for="uname">$lt{'un'}</label>:</b><br />
        <td bgcolor="$sidebg" align="left" valign="top">    <input type="text" name="uname" id="uname" size="15" value="$authusername" readonly="readonly" $mobileargs /><br />
         <small><b>&nbsp;&nbsp;&nbsp;$lt{'load'}:&nbsp;</b></small>    <b><label for="upass$now">$lt{'pw'}</label>:</b><br />
        </td>    <input type="password" name="upass$now" id="upass$now" size="15" readonly="readonly" /><br />
        <td bgcolor="$sidebg" align="left" valign="top">    <b><label for="udom">$lt{'dom'}</label>:</b><br />
         <small><tt>&nbsp;$loadpercent $lt{'perc'}</tt></small>    <input type="text" name="udom" id="udom" size="15" value="$authdomain" readonly="readonly" $mobileargs /><br />
        </td>    <input type="submit" value="$lt{'log'}" />
       </tr>  </form>
       <tr>  LFORM
        <td bgcolor="$sidebg" align="left" valign="top">  
         <small><b>&nbsp;&nbsp;&nbsp;$lt{'userload'}:&nbsp;</b></small>      if ($showbanner) {
        </td>          $r->print(<<HEADER);
        <td bgcolor="$sidebg" align="left" valign="top">  <!-- The LON-CAPA Header -->
         <small><tt>&nbsp;$userloadpercent $lt{'perc'}</tt></small>  <div style="background:$pgbg;margin:0;width:100%;">
        </td>    <img src="$img" border="0" alt="The Learning Online Network with CAPA" class="LC_maxwidth" />
       </tr>  </div>
      </table>  HEADER
      <br />      }
     $contactblock      $r->print(<<ENDTOP);
    </td>  <div style="float:left;margin-top:0;">
   <div class="LC_Box" style="background:$loginbox_bg;">
    <!-- Row 5 Column 2 -->    $logintitle
    <td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td>    $loginform
     $noscript_warning
    <!-- Row 5 Column 3 -->  </div>
    <td width="100%" valign="bottom" bgcolor="$mainbg">   
 $domainlogo  <div class="LC_Box" style="padding-top: 10px;">
 </td>    $loginhelp
     $forgotpw
    <!-- Row 5 Column 4 -->    $contactblock
    <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td>    $newuserlink
   </tr>    $coursecatalog
   <tr>  </div>
   </div>
    <!-- Row 6 Column 1 -->  
    <td bgcolor="$sidebg">&nbsp;</td>  <div>
   ENDTOP
    <!-- Row 6 Column 2 -->      if ($showmainlogo) {
    <td align="left" background="$iconpath/fillbottom.gif"><img src="$iconpath/lowerleft.gif" alt="" /></td>          $r->print(' <img src="'.$logo.'" alt="" class="LC_maxwidth" />'."\n");
       }
    <!-- Row 6 Column 3 -->  $r->print(<<ENDTOP);
    <td background="$iconpath/fillbottom.gif"><img src="$iconpath/fillbottom.gif" alt="" /></td>  $announcements
   </div>
    <!-- Row 6 Column 4 -->  <hr style="clear:both;" />
    <td align="right" background="$iconpath/fillbottom.gif"><img src="$iconpath/lowerright.gif" alt="" /></td>  ENDTOP
   </tr>      my ($domainrow,$serverrow,$loadrow,$userloadrow,$versionrow);
  </table>      $domainrow = <<"END";
         <tr>
 <script type="text/javascript">         <td  align="left" valign="top">
 // the if prevents the script error if the browser can not handle this          <small><b>$lt{'dom'}:&nbsp;</b></small>
 if ( document.client.uname ) { document.client.uname.focus(); }         </td>
 </script>         <td  align="left" valign="top">
 $helpdeskscript          <small><tt>&nbsp;$domain</tt></small>
          </td>
 ENDDOCUMENT        </tr>
 }  END
     $r->print('</body></html>');      $serverrow = <<"END";
     return OK;        <tr>
 }         <td  align="left" valign="top">
           <small><b>$lt{'serv'}:&nbsp;</b></small>
 sub contactdisplay {         </td>
     my ($lt,$servadm,$showadminmail,$version,$authdomain,$helpdeskscript) = @_;         <td align="left" valign="top">
     my $contactblock;          <small><tt>&nbsp;$lonhost ($role)</tt></small>
     my $showhelpdesk = 0;         </td>
     my $requestmail = $Apache::lonnet::perlvar{'lonSupportEMail'};        </tr>
     if ($requestmail =~ m/^[^\@]+\@[^\@]+$/) {  END
         $showhelpdesk = 1;      if ($loadlim) {
     }          $loadrow = <<"END";
     if ($servadm && $showadminmail) {        <tr>
         $contactblock .= '<b>&nbsp;&nbsp;&nbsp;'.$$lt{'servadm'}.':</b><br />'.         <td align="left" valign="top">
                          '<tt>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;'.$servadm.'</tt><br />&nbsp;<br />';          <small><b>$lt{'load'}:&nbsp;</b></small>
     }         </td>
     if ($showhelpdesk) {         <td align="left" valign="top">
         $contactblock .= '<b>&nbsp;&nbsp;&nbsp;<a href="javascript:helpdesk()"><font size="+1">'.$lt->{'helpdesk'}.'</font></a></b><br />';          <small><tt>&nbsp;$loadpercent $lt{'perc'}</tt></small>
         my $thisurl = &escape('/adm/login');         </td>
         $$helpdeskscript = <<"ENDSCRIPT";        </tr>
 <script type="text/javascript">  END
 function helpdesk() {      }
     var codedom = document.client.udom.value;      if ($uloadlim) {
     if (codedom == '') {          $userloadrow = <<"END";
         codedom = "$authdomain";        <tr>
     }         <td align="left" valign="top">
     var querystr = "origurl=$thisurl&codedom="+codedom;          <small><b>$lt{'userload'}:&nbsp;</b></small>
     document.location.href = "/adm/helpdesk?"+querystr;         </td>
     return;         <td align="left" valign="top">
 }          <small><tt>&nbsp;$userloadpercent $lt{'perc'}</tt></small>
 </script>         </td>
 ENDSCRIPT        </tr>
     }  END
     $contactblock .= <<"ENDBLOCK";      }
      &nbsp;&nbsp;&nbsp;$version      if (($version ne '') && ($version ne '<!-- VERSION -->')) {
 ENDBLOCK          $versionrow = <<"END";
     return $contactblock;        <tr>
 }         <td colspan="2" align="left">
           <small>$version</small>
 sub forgotpwdisplay {         </td>
     my (%lt) = @_;        </tr>
     my $prompt_for_resetpw = 1;   END
     if ($prompt_for_resetpw) {      }
         return '<br />&nbsp;&nbsp;&nbsp;<a href="/adm/resetpw">'.$lt{'forgotpw'}.'</a></b><br /><br />';  
     }      $r->print(<<ENDDOCUMENT);
     return;      <div style="float: left;">
 }       <table border="0" cellspacing="0" cellpadding="0">
   $domainrow
 sub loginhelpdisplay {  $serverrow
     my (%lt) = @_;  $loadrow    
     my $login_help = 1;  $userloadrow
     if ($login_help) {  $versionrow
         return '&nbsp;&nbsp;&nbsp;<a href="/adm/loginproblems.html">'.$lt{'help'}.'</a></b>';       </table>
     }      </div>
     return;      <div style="float: right;">
 }      $domainlogo
       </div>
 sub coursecatalog_link {      <br style="clear:both;" />
     my ($linkname) = @_;   </div>
     return <<"END";  
      <tr>  <script type="text/javascript">
       <td>&nbsp;</td>  // <![CDATA[
       <td><a href="/adm/coursecatalog"><b>$linkname</b></a></td>  // the if prevents the script error if the browser can not handle this
      </tr>  if ( document.client.uname ) { document.client.uname.focus(); }
 END  // ]]>
 }  </script>
   $helpdeskscript
 1;  
 __END__  ENDDOCUMENT
       my %endargs = ( 'noredirectlink' => 1, );
       $r->print(&Apache::loncommon::end_page(\%endargs));
       return OK;
   }
   
   sub check_loginvia {
       my ($domain,$lonhost) = @_;
       if ($domain eq '' || $lonhost eq '') {
           return;
       }
       my %domconfhash = &Apache::loncommon::get_domainconf($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 = $ENV{'REMOTE_ADDR'};
           if ($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 '') {
                       $output = &redirect_page($newhost,$path);
                   }
               }
           }
       }
       return $output;
   }
   
   sub redirect_page {
       my ($desthost,$path) = @_;
       my $protocol = $Apache::lonnet::protocol{$desthost};
       $protocol = 'http' if ($protocol ne 'https');
       unless ($path =~ m{^/}) {
           $path = '/'.$path;
       }
       my $url = $protocol.'://'.&Apache::lonnet::hostname($desthost).$path;
       if ($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,$showadminmail,$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>';
   }
   
   1;
   __END__
Removed from v.1.90  
changed lines
  Added in v.1.172

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