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Diff for /loncom/auth/lonlogin.pm between versions 1.96 and 1.165

version 1.96, 2007/10/02 01:09:59 version 1.165, 2016/02/17 19:15:39
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 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;
     
 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($r);  
     }  # -- check if they are a migrating user
       if (defined($env{'form.token'})) {
     &Apache::loncommon::no_cache($r);   return &Apache::migrateuser::handler($r);
     &Apache::lonlocal::get_language_handle($r);      }
     &Apache::loncommon::content_type($r,'text/html');  
     $r->send_http_header;      &Apache::loncommon::no_cache($r);
     return OK if $r->header_only;      &Apache::lonlocal::get_language_handle($r);
       &Apache::loncommon::content_type($r,'text/html');
       $r->send_http_header;
 # Are we re-routing?      return OK if $r->header_only;
     if (-e '/home/httpd/html/lon-status/reroute.txt') {  
  &Apache::lonauth::reroute($r);  
  return OK;  # Are we re-routing?
     }      my $londocroot = $r->dir_config('lonDocRoot');
       if (-e "$londocroot/lon-status/reroute.txt") {
    &Apache::lonauth::reroute($r);
 # -------------------------------- Prevent users from attempting to login twice   return OK;
     my $handle = &Apache::lonnet::check_for_valid_session($r);      }
     if ($handle=~/^publicuser\_/) {  
 # For "public user" - remove it, we apparently really want to login      $env{'form.firsturl'} =~ s/(`)/'/g;
  unlink($r->dir_config('lonIDsDir')."/$handle.id");  
     } elsif ($handle ne '') {  # -------------------------------- Prevent users from attempting to login twice
 # Indeed, a valid token is found      my $handle = &Apache::lonnet::check_for_valid_session($r);
  my $start_page =       if ($handle ne '') {
     &Apache::loncommon::start_page('Already logged in');          my $lonidsdir=$r->dir_config('lonIDsDir');
  my $end_page =           if ($handle=~/^publicuser\_/) {
     &Apache::loncommon::end_page();  # For "public user" - remove it, we apparently really want to login
  $r->print(<<ENDFAILED);      unlink($r->dir_config('lonIDsDir')."/$handle.id");
 $start_page          } else {
 <h1>You are already logged in</h1>  # Indeed, a valid token is found
 <p>Please either <a href="/adm/roles">continue the current session</a> or              &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
 <a href="/adm/logout">logout</a>.</p>      my $start_page =
 <p>          &Apache::loncommon::start_page('Already logged in');
 <a href="/adm/loginproblems.html">Problems?</a></p>      my $end_page =
 $end_page          &Apache::loncommon::end_page();
 ENDFAILED              my $dest = '/adm/roles';
         return OK;              if ($env{'form.firsturl'} ne '') {
     }                  $dest = $env{'form.firsturl'};
               }
 # ---------------------------------------------------- No valid token, continue      $r->print(
                     $start_page
  # ---------------------------- Not possible to really login to domain "public"                   .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>'
     if ($env{'form.domain'} eq 'public') {                   .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].',
  $env{'form.domain'}='';                    '<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>').'</p>'
  $env{'form.username'}='';                   .$end_page
     }                   );
 # ----------------------------------------------------------- Process Interface              return OK;
     $env{'form.interface'}=~s/\W//g;          }
       }
     my $textbrowsers=$r->dir_config('lonTextBrowsers');  
     my $httpbrowser=$ENV{"HTTP_USER_AGENT"};  # ---------------------------------------------------- No valid token, continue
       
     foreach (split(/\:/,$textbrowsers)) {  # ---------------------------- Not possible to really login to domain "public"
  if ($httpbrowser=~/$_/i) {      if ($env{'form.domain'} eq 'public') {
     $env{'form.interface'}='textual';   $env{'form.domain'}='';
         }   $env{'form.username'}='';
     }      }
   
     my $fullgraph=($env{'form.interface'} ne 'textual');  # ------ Is this page requested because /adm/migrateuser detected an IP change?
       my %sessiondata;
     my $iconpath=       if ($env{'form.iptoken'}) {
  &Apache::loncommon::lonhttpdurl($r->dir_config('lonIconsURL'));          %sessiondata = &Apache::lonnet::tmpget($env{'form.iptoken'});
           unless ($sessiondata{'sessionserver'}) {
     my $domain = &Apache::lonnet::default_login_domain();              my $delete = &Apache::lonnet::tmpdel($env{'form.iptoken'});
     if (($env{'form.domain'}) &&               delete($env{'form.iptoken'});
  (&Apache::lonnet::domain($env{'form.domain'},'description'))) {          }
  $domain=$env{'form.domain'};      }
     }  # ----------------------------------------------------------- Process Interface
     my $role    = $r->dir_config('lonRole');      $env{'form.interface'}=~s/\W//g;
     my $loadlim = $r->dir_config('lonLoadLim');  
     my $servadm = $r->dir_config('lonAdmEMail');      (undef,undef,undef,undef,undef,undef,my $clientmobile) =
     my $lonhost = $r->dir_config('lonHostID');          &Apache::loncommon::decode_user_agent();
     my $tabdir  = $r->dir_config('lonTabDir');  
     my $include = $r->dir_config('lonIncludes');      my $iconpath=
     my $expire  = $r->dir_config('lonExpire');   &Apache::loncommon::lonhttpdurl($r->dir_config('lonIconsURL'));
     my $version = $r->dir_config('lonVersion');  
     my $host_name = &Apache::lonnet::hostname($lonhost);      my $lonhost = $r->dir_config('lonHostID');
       my $domain = &Apache::lonnet::default_login_domain();
 # --------------------------------------------- Default values for login fields      my $defdom = $domain;
       if ($lonhost ne '') {
     my $authusername=($env{'form.username'}?$env{'form.username'}:'');          unless ($sessiondata{'sessionserver'}) {
     my $authdomain=($env{'form.domain'}?$env{'form.domain'}:$domain);              my $redirect = &check_loginvia($domain,$lonhost);
               if ($redirect) {
 # ---------------------------------------------------------- Determine own load                  $r->print($redirect);
     my $loadavg;                  return OK;
     {              }
  my $loadfile=Apache::File->new('/proc/loadavg');          }
  $loadavg=<$loadfile>;      }
     }  
     $loadavg =~ s/\s.*//g;      if (($sessiondata{'domain'}) &&
     my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);          (&Apache::lonnet::domain($env{'form.domain'},'description'))) {
     my $userloadpercent=&Apache::lonnet::userload();          $domain=$sessiondata{'domain'};
       } elsif (($env{'form.domain'}) &&
 # ------------------------------------------------------- Do the load balancing   (&Apache::lonnet::domain($env{'form.domain'},'description'))) {
     my $otherserver= &Apache::lonnet::absolute_url($host_name);   $domain=$env{'form.domain'};
     my $firsturl=      }
     ($env{'request.firsturl'}?$env{'request.firsturl'}:$env{'form.firsturl'});  
 # ---------------------------------------- Are we access server and overloaded?      my $role    = $r->dir_config('lonRole');
     if (($role eq 'access') &&      my $loadlim = $r->dir_config('lonLoadLim');
  (($userloadpercent>100.0)||($loadpercent>100.0))) {      my $uloadlim= $r->dir_config('lonUserLoadLim');
         my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent);      my $servadm = $r->dir_config('lonAdmEMail');
  if ($unloaded) { $otherserver=$unloaded; }      my $tabdir  = $r->dir_config('lonTabDir');
     }      my $include = $r->dir_config('lonIncludes');
       my $expire  = $r->dir_config('lonExpire');
 # ----------------------------------------------------------- Get announcements      my $version = $r->dir_config('lonVersion');
     my $announcements=&Apache::lonnet::getannounce();      my $host_name = &Apache::lonnet::hostname($lonhost);
 # -------------------------------------------------------- Set login parameters  
   # --------------------------------------------- Default values for login fields
     my @hexstr=('0','1','2','3','4','5','6','7',     
                 '8','9','a','b','c','d','e','f');      my ($authusername,$authdomain);
     my $lkey='';      if ($sessiondata{'username'}) {
     for (0..7) {          $authusername=$sessiondata{'username'};
         $lkey.=$hexstr[rand(15)];      } else {
     }          $env{'form.username'} = &Apache::loncommon::cleanup_html($env{'form.username'});
           $authusername=($env{'form.username'}?$env{'form.username'}:'');
     my $ukey='';      }
     for (0..7) {      if ($sessiondata{'domain'}) {
         $ukey.=$hexstr[rand(15)];          $authdomain=$sessiondata{'domain'};
     }      } else {
           $env{'form.domain'} = &Apache::loncommon::cleanup_html($env{'form.domain'});
     my $lextkey=hex($lkey);          $authdomain=($env{'form.domain'}?$env{'form.domain'}:$domain);
     if ($lextkey>2147483647) { $lextkey-=4294967296; }      }
   
     my $uextkey=hex($ukey);  # ---------------------------------------------------------- Determine own load
     if ($uextkey>2147483647) { $uextkey-=4294967296; }      my $loadavg;
       {
 # -------------------------------------------------------- Store away log token   my $loadfile=Apache::File->new('/proc/loadavg');
     my $logtoken=Apache::lonnet::reply(   $loadavg=<$loadfile>;
        'tmpput:'.$ukey.$lkey.'&'.$firsturl,      }
        $lonhost);      $loadavg =~ s/\s.*//g;
   
 # ------------------- If we cannot talk to ourselves, we are in serious trouble      my ($loadpercent,$userloadpercent);
       if ($loadlim) {
     if ($logtoken eq 'con_lost') {          $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);
         my $spares='';      }
  my $last;      if ($uloadlim) {
         foreach my $hostid (sort          $userloadpercent=&Apache::lonnet::userload();
     {      }
  &Apache::lonnet::hostname($a) cmp  
     &Apache::lonnet::hostname($b);      my $firsturl=
     }      ($env{'request.firsturl'}?$env{'request.firsturl'}:$env{'form.firsturl'});
     keys(%Apache::lonnet::spareid)) {  
             next if ($hostid eq $lonhost);  # ----------------------------------------------------------- Get announcements
     my $hostname = &Apache::lonnet::hostname($hostid);      my $announcements=&Apache::lonnet::getannounce();
     next if ($last eq $hostname);  # -------------------------------------------------------- Set login parameters
             $spares.='<br /><font size="+1"><a href="http://'.  
                 $hostname.      my @hexstr=('0','1','2','3','4','5','6','7',
                 '/adm/login?domain='.$authdomain.'">'.                  '8','9','a','b','c','d','e','f');
                 $hostname.'</a>'.      my $lkey='';
                 ' (preferred)</font>'.$/;      for (0..7) {
     $last=$hostname;          $lkey.=$hexstr[rand(15)];
         }      }
         $spares.= '<br />';  
  my %all_hostnames = &Apache::lonnet::all_hostnames();      my $ukey='';
         foreach my $hostid (sort      for (0..7) {
     {          $ukey.=$hexstr[rand(15)];
  &Apache::lonnet::hostname($a) cmp      }
     &Apache::lonnet::hostname($b);  
     }      my $lextkey=hex($lkey);
     keys(%all_hostnames)) {      if ($lextkey>2147483647) { $lextkey-=4294967296; }
             next if ($hostid eq $lonhost || $Apache::lonnet::spareid{$hostid});  
     my $hostname = &Apache::lonnet::hostname($hostid);      my $uextkey=hex($ukey);
             next if ($last eq $hostname);      if ($uextkey>2147483647) { $uextkey-=4294967296; }
             $spares.='<br /><a href="http://'.  
                 $hostname.  # -------------------------------------------------------- Store away log token
                 '/adm/login?domain='.$authdomain.'">'.      my $tokenextras;
                 $hostname.'</a>';      if ($env{'form.role'}) {
     $last=$hostname;          $tokenextras = '&role='.&escape($env{'form.role'});
         }      }
  $r->print(<<ENDTROUBLE);      if ($env{'form.symb'}) {
 <html>          if (!$tokenextras) {
 <head><title>The LearningOnline Network with CAPA</title></head>              $tokenextras = '&';
 <body bgcolor="#FFFFFF">          }
 <img src="/adm/lonKaputt/lonlogo_broken.gif" align="right" />          $tokenextras .= '&symb='.&escape($env{'form.symb'});
 <h3>This LON-CAPA server is temporarily not available for login</h3>      }
 <p>Please attempt to login to one of the following servers:</p>$spares      if ($env{'form.iptoken'}) {
 </body>          if (!$tokenextras) {
 </html>              $tokenextras = '&&';
 ENDTROUBLE          }
         return OK;          $tokenextras .= '&iptoken='.&escape($env{'form.iptoken'});
     }      }
       my $logtoken=Apache::lonnet::reply(
 # ----------------------------------------------- Apparently we are in business         'tmpput:'.$ukey.$lkey.'&'.$firsturl.$tokenextras,
     $servadm=~s/\,/\<br \/\>/g;         $lonhost);
   
 # --------------------------------------------------- Print login screen header  # -- If we cannot talk to ourselves, or hostID does not map to a hostname
     $r->print(<<ENDHEADER);  #    we are in serious trouble
 <html>  
 <head>      if (($logtoken eq 'con_lost') || ($logtoken eq 'no_such_host')) {
 <meta HTTP-EQUIV="Refresh" CONTENT="$expire; url=/adm/roles" />          if ($logtoken eq 'no_such_host') {
 <title>The LearningOnline Network with CAPA Login</title>              &Apache::lonnet::logthis('No valid logtoken for log-in page -- unable to determine hostname for hostID: '.$lonhost.'. Check entry in hosts.tab');
 </head>          }
 ENDHEADER          my $spares='';
 # ---------------------------------------------------- Serve out DES JavaScript   my $last;
     {          foreach my $hostid (sort
  my $jsh=Apache::File->new($include."/londes.js");      {
         $r->print(<$jsh>);   &Apache::lonnet::hostname($a) cmp
     }      &Apache::lonnet::hostname($b);
       }
 # ----------------------------------------------------------- Front page design      keys(%Apache::lonnet::spareid)) {
     my $pgbg=              next if ($hostid eq $lonhost);
       ($fullgraph?&Apache::loncommon::designparm('login.pgbg',$domain):'#FFFFFF');      my $hostname = &Apache::lonnet::hostname($hostid);
     my $font=      next if (($last eq $hostname) || ($hostname eq ''));
       ($fullgraph?&Apache::loncommon::designparm('login.font',$domain):'#000000');              $spares.='<br /><font size="+1"><a href="http://'.
     my $link=                  $hostname.
       ($fullgraph?&Apache::loncommon::designparm('login.link',$domain):'#0000FF');                  '/adm/login?domain='.$authdomain.'">'.
     my $vlink=                  $hostname.'</a>'.
       ($fullgraph?&Apache::loncommon::designparm('login.vlink',$domain):'#0000FF');                  ' '.&mt('(preferred)').'</font>'.$/;
     my $alink=&Apache::loncommon::designparm('login.alink',$domain);      $last=$hostname;
     my $mainbg=          }
       ($fullgraph?&Apache::loncommon::designparm('login.mainbg',$domain):'#FFFFFF');          if ($spares) {
     my $sidebg=              $spares.= '<br />';
       ($fullgraph?&Apache::loncommon::designparm('login.sidebg',$domain):'#FFFFFF');          }
     my $logo=&Apache::loncommon::designparm('login.logo',$domain);          my %all_hostnames = &Apache::lonnet::all_hostnames();
     my $img=&Apache::loncommon::designparm('login.img',$domain);          foreach my $hostid (sort
     my $domainlogo=&Apache::loncommon::domainlogo($domain);      {
     my $showadminmail=&Apache::loncommon::designparm('login.adminmail',                                                      $domain);   &Apache::lonnet::hostname($a) cmp
     my $showcoursecat =      &Apache::lonnet::hostname($b);
         &Apache::loncommon::designparm('login.coursecatalog',$domain);      }
       keys(%all_hostnames)) {
               next if ($hostid eq $lonhost || $Apache::lonnet::spareid{$hostid});
 # ----------------------------------------------------------------------- Texts              my $hostname = &Apache::lonnet::hostname($hostid);
               next if (($last eq $hostname) || ($hostname eq ''));
 my %lt=&Apache::lonlocal::texthash(              $spares.='<br /><a href="http://'.
   'un'  => 'Username',               $hostname.
   'pw'  => 'Password',               '/adm/login?domain='.$authdomain.'">'.
   'dom' => 'Domain',               $hostname.'</a>';
   'perc' => 'percent',              $last=$hostname;
   'load' => 'Load',           }
                   'userload' => 'User Load',           $r->print(
                   'about'  => 'About LON-CAPA',     '<html>'
                   'access' => 'Accessibility Options',    .'<head><title>'
                   'catalog' => 'Course Catalog',    .&mt('The LearningOnline Network with CAPA')
   'auth' => 'userauthentication.gif',    .'</title></head>'
   'log' => 'Log in',    .'<body bgcolor="#FFFFFF">'
   'help' => 'Log-in Help',    .'<h1>'.&mt('The LearningOnline Network with CAPA').'</h1>'
   'serv' => 'Server',    .'<img src="/adm/lonKaputt/lonlogo_broken.gif" align="right" />'
                   'servadm' => 'Server Administration',    .'<h3>'.&mt('This LON-CAPA server is temporarily not available for login.').'</h3>');
                   'helpdesk' => 'Contact Helpdesk',          if ($spares) {
                   'forgotpw' => 'Forgot password?');              $r->print('<p>'.&mt('Please attempt to login to one of the following servers:')
 # -------------------------------------------------- Change password field name                       .'</p>'
     my $now=time;                       .$spares);
     my $forgotpw = &forgotpwdisplay(%lt);          }
     my $loginhelp = &loginhelpdisplay(%lt);          $r->print('</body>'
 # ---------------------------------------------------------- Serve rest of page                   .'</html>'
     $r->print(<<ENDSCRIPT);          );
           return OK;
 <body bgcolor="$pgbg" text="$font" link="$link" vlink="$vlink" alink="$alink"      }
   topmargin=0 leftmargin=0 marginwidth=0 marginheight=0>  
   # ----------------------------------------------- Apparently we are in business
  <script language="JavaScript">      $servadm=~s/\,/\<br \/\>/g;
     function send()  
     {  # ----------------------------------------------------------- Front page design
  this.document.server.elements.uname.value      my $pgbg=&Apache::loncommon::designparm('login.pgbg',$domain);
        =this.document.client.elements.uname.value;      my $font=&Apache::loncommon::designparm('login.font',$domain);
       my $link=&Apache::loncommon::designparm('login.link',$domain);
         this.document.server.elements.udom.value      my $vlink=&Apache::loncommon::designparm('login.vlink',$domain);
        =this.document.client.elements.udom.value;      my $alink=&Apache::loncommon::designparm('login.alink',$domain);
       my $mainbg=&Apache::loncommon::designparm('login.mainbg',$domain);
         this.document.server.elements.imagesuppress.value      my $loginbox_bg=&Apache::loncommon::designparm('login.sidebg',$domain);
        =this.document.client.elements.imagesuppress.checked;      my $loginbox_header_bgcol=&Apache::loncommon::designparm('login.bgcol',$domain);
       my $loginbox_header_textcol=&Apache::loncommon::designparm('login.textcol',$domain);
         this.document.server.elements.embedsuppress.value      my $logo=&Apache::loncommon::designparm('login.logo',$domain);
        =this.document.client.elements.embedsuppress.checked;      my $img=&Apache::loncommon::designparm('login.img',$domain);
       my $domainlogo=&Apache::loncommon::domainlogo($domain);
         this.document.server.elements.appletsuppress.value      my $showbanner = 1;
        =this.document.client.elements.appletsuppress.checked;      my $showmainlogo = 1;
       if (defined(&Apache::loncommon::designparm('login.showlogo_img',$domain))) {
         this.document.server.elements.fontenhance.value          $showbanner = &Apache::loncommon::designparm('login.showlogo_img',$domain);
        =this.document.client.elements.fontenhance.checked;      }
       if (defined(&Apache::loncommon::designparm('login.showlogo_logo',$domain))) {
         this.document.server.elements.blackwhite.value          $showmainlogo = &Apache::loncommon::designparm('login.showlogo_logo',$domain);
        =this.document.client.elements.blackwhite.checked;      }
       my $showadminmail;
         this.document.server.elements.remember.value      my @possdoms = &Apache::lonnet::current_machine_domains();
        =this.document.client.elements.remember.checked;      if (grep(/^\Q$domain\E$/,@possdoms)) {
           $showadminmail=&Apache::loncommon::designparm('login.adminmail',$domain);
         uextkey=this.document.client.elements.uextkey.value;      }
         lextkey=this.document.client.elements.lextkey.value;      my $showcoursecat =
         initkeys();          &Apache::loncommon::designparm('login.coursecatalog',$domain);
       my $shownewuserlink =
         this.document.server.elements.upass0.value          &Apache::loncommon::designparm('login.newuser',$domain);
     =crypted(this.document.client.elements.upass$now.value.substr(0,15));      my $showhelpdesk =
  this.document.server.elements.upass1.value          &Apache::loncommon::designparm('login.helpdesk',$domain);
     =crypted(this.document.client.elements.upass$now.value.substr(15,15));      my $now=time;
  this.document.server.elements.upass2.value      my $js = (<<ENDSCRIPT);
     =crypted(this.document.client.elements.upass$now.value.substr(30,15));  
   <script type="text/javascript" language="JavaScript">
         this.document.client.elements.uname.value='';  // <![CDATA[
         this.document.client.elements.upass$now.value='';  function send()
   {
         this.document.server.submit();  this.document.server.elements.uname.value
  return false;  =this.document.client.elements.uname.value;
     }  
  </script>  this.document.server.elements.udom.value
 ENDSCRIPT  =this.document.client.elements.udom.value;
   
     if ($fullgraph) {  uextkey=this.document.client.elements.uextkey.value;
  $r->print(  lextkey=this.document.client.elements.lextkey.value;
   '<table width="100%" cellpadding=0 cellspacing=0 border=0>');  initkeys();
     }  
   if(this.document.server.action.substr(0,5) === 'http:'){
     $r->print(<<ENDSERVERFORM);      this.document.server.elements.upass0.value
   <form name="server" action="$otherserver/adm/authenticate" method="post" target="_top">          =getCrypted(this.document.client.elements.upass$now.value);
    <input type="hidden" name="logtoken" value="$logtoken" />  }
    <input type="hidden" name="serverid" value="$lonhost" />  
    <input type="hidden" name="interface" value="$env{'form.interface'}" />  this.document.client.elements.uname.value='';
    <input type="hidden" name="uname" value="" />  this.document.client.elements.upass$now.value='';
    <input type="hidden" name="upass0" value="" />  
    <input type="hidden" name="upass1" value="" />  this.document.server.submit();
    <input type="hidden" name="upass2" value="" />  return false;
    <input type="hidden" name="udom" value="" />  }
    <input type="hidden" name="imagesuppress"  value="" />  
    <input type="hidden" name="appletsuppress"  value="" />  function enableInput() {
    <input type="hidden" name="embedsuppress"  value="" />      this.document.client.elements.upass$now.removeAttribute("readOnly");
    <input type="hidden" name="fontenhance"  value="" />      this.document.client.elements.uname.removeAttribute("readOnly");
    <input type="hidden" name="blackwhite"  value="" />      this.document.client.elements.udom.removeAttribute("readOnly");
    <input type="hidden" name="remember"  value="" />      return;
    <input type="hidden" name="localpath" value="$env{'form.localpath'}" />  }
    <input type="hidden" name="localres" value="$env{'form.localres'}" />  
   </form>  // ]]>
 ENDSERVERFORM  </script>
     my $coursecatalog;  
     if (($showcoursecat eq '') || ($showcoursecat)) {  ENDSCRIPT
         $coursecatalog = &coursecatalog_link($lt{'catalog'});  
     }  # --------------------------------------------------- Print login screen header
     if ($fullgraph) { $r->print(<<ENDTOP);  
   <!-- The LON-CAPA Header -->      my %add_entries = (
   <tr>         bgcolor      => "$mainbg",
          text         => "$font",
    <!-- Row 1 Columns 2-4 -->         link         => "$link",
    <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>         vlink        => "$vlink",
   </tr>         alink        => "$alink",
                  onload       => 'javascript:enableInput();',);
   <!-- The gray bar that starts the two table frames -->  
   <tr>      my ($lonhost_in_use,$headextra,$headextra_exempt,@hosts,%defaultdomconf);
       @hosts = &Apache::lonnet::current_machine_ids();
    <!-- Row 2 Column 1 -->      $lonhost_in_use = $lonhost;
    <td width=182 height=27 bgcolor="$sidebg">&nbsp;</td>      if (@hosts > 1) {
           foreach my $hostid (@hosts) {
    <!-- Row 2 Column 2 -->              if (&Apache::lonnet::host_domain($hostid) eq $defdom) {
    <td width=27 height=27 align="left" background="$iconpath/filltop.gif"><img src="$iconpath/upperleft.gif" border=0 alt="" /></td>                  $lonhost_in_use = $hostid;
                   last;
    <!-- Row 2 Column 3 -->              }
    <td height=27 background="$iconpath/filltop.gif"><img src="$iconpath/filltop.gif" alt="" /></td>          }
       }
    <!-- Row 2 Column 4 -->      %defaultdomconf = &Apache::loncommon::get_domainconf($defdom);
    <td width=27 height=27 align="right" background="$iconpath/filltop.gif"><img src="$iconpath/upperright.gif" border=0 alt="" /></td>      $headextra = $defaultdomconf{$defdom.'.login.headtag_'.$lonhost_in_use};
   </tr>      $headextra_exempt = $defaultdomconf{$domain.'.login.headtag_exempt_'.$lonhost_in_use};
   <tr>      if ($headextra) {
              my $omitextra;
    <!-- A cell that will hold the 'access', 'about', and 'catalog' links -->          if ($headextra_exempt ne '') {
    <!-- Row 3 Column 1 -->              my @exempt = split(',',$headextra_exempt);
    <td valign="top" height="60" align="left" bgcolor="$sidebg">              my $ip = $ENV{'REMOTE_ADDR'};
     <table cellpadding="0" cellspacing="2" border="0">              if (grep(/^\Q$ip\E$/,@exempt)) {
      <tr>                  $omitextra = 1;
       <td>&nbsp;</td>              }
       <td><a href="/adm/login?interface=textual"><b>$lt{'access'}</b></a></td>          }
      </tr>          unless ($omitextra) {
      <tr>              my $confname = $defdom.'-domainconfig';
       <td>&nbsp;</td>              if ($headextra =~ m{^\Q/res/$defdom/$confname/login/headtag/$lonhost_in_use/\E}) {
       <td><a href="/adm/about.html"><b>$lt{'about'}</b></a></td>                  my $extra = &Apache::lonnet::getfile(&Apache::lonnet::filelocation("",$headextra));
      </tr>$coursecatalog                  unless ($extra eq '-1') {
      <tr>                      $js .= "\n".$extra."\n";
       <td colspan="2">&nbsp;</td>                  }
      </tr>              }
     </table>          }
    </td>      }
    <!-- The shaded space between the two main columns -->  
    <!-- Row 3 Column 2 -->      $r->print(&Apache::loncommon::start_page('The LearningOnline Network with CAPA Login',$js,
    <td width=27 height=60 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td>         { 'redirect'       => [$expire,'/adm/roles'],
    'add_entries' => \%add_entries,
    <!-- The right main column holding the large LON-CAPA logo-->   'only_body'   => 1,}));
    <!-- Rows 3-4 Column 3 -->  
    <td align="center" valign="top" width="100%" height="100%" bgcolor="$mainbg">  # ----------------------------------------------------------------------- Texts
     <center>  
      <img src="$logo" alt="" />      my %lt=&Apache::lonlocal::texthash(
     </center>            'un'       => 'Username',
    </td>            'pw'       => 'Password',
             'dom'      => 'Domain',
    <!-- Row 3 Column 4 -->            'perc'     => 'percent',
    <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td>            'load'     => 'Server Load',
   </tr>            'userload' => 'User Load',
   <tr>            'catalog'  => 'Course/Community Catalog',
             'log'      => 'Log in',
    <!-- The entry form -->            'help'     => 'Log-in Help',
    <!-- Row 4 Column 1 -->            'serv'     => 'Server',
    <td align="center" valign="middle" bgcolor="$sidebg">            'servadm'  => 'Server Administration',
 ENDTOP            'helpdesk' => 'Contact Helpdesk',
 } else {            'forgotpw' => 'Forgot password?',
     $r->print('<h1>The Learning<i>Online</i> Network with CAPA</h1><h2>Text-based Interface Login</h2>'.$announcements);            'newuser'  => 'New User?',
 }         );
     $r->print('<form name="client" onsubmit="return(send())">');  # -------------------------------------------------- Change password field name
     unless ($fullgraph) {  
         $r->print(<<ENDACCESSOPTIONS);      my $forgotpw = &forgotpwdisplay(%lt);
 <h3>Select Accessibility Options</h3>      $forgotpw .= '<br />' if $forgotpw;
 <label><input type="checkbox" name="imagesuppress" /> Suppress rendering of images</label><br />      my $loginhelp = &Apache::lonauth::loginhelpdisplay($authdomain);
 <label><input type="checkbox" name="appletsuppress" /> Suppress Java applets</label><br />      if ($loginhelp) {
 <label><input type="checkbox" name="embedsuppress" /> Suppress rendering of embedded multimedia</label><br />          $loginhelp = '<a href="'.$loginhelp.'">'.$lt{'help'}.'</a><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 />  # ---------------------------------------------------- Serve out DES JavaScript
 ENDACCESSOPTIONS      {
 } else {      my $jsh=Apache::File->new($include."/londes.js");
     $r->print(<<ENDNOOPT);      $r->print(<$jsh>);
 <input type="hidden" name="imagesuppress"  value="" />      }
 <input type="hidden" name="embedsuppress"  value="" />  # ---------------------------------------------------------- Serve rest of page
 <input type="hidden" name="appletsuppress"  value="" />  
 <input type="hidden" name="fontenhance"  value="" />      $r->print(
 <input type="hidden" name="blackwhite"  value="" />      '<div class="LC_Box"'
 <input type="hidden" name="remember"  value="" />     .' style="margin:0 auto; padding:10px; width:90%; height: auto; background-color:#FFFFFF;">'
 ENDNOOPT  );
 }  
     $r->print(<<ENDLOGIN);      $r->print(<<ENDSERVERFORM);
      <input type="hidden" name="lextkey" value="$lextkey">  <form name="server" action="/adm/authenticate" method="post" target="_top">
      <input type="hidden" name="uextkey" value="$uextkey">     <input type="hidden" name="logtoken" value="$logtoken" />
      <input type="hidden" name="serverid" value="$lonhost" />
      <!-- Start the sub-table for text and input alignment -->     <input type="hidden" name="uname" value="" />
      <table border=0 cellspacing=0 cellpadding=0>     <input type="hidden" name="upass0" value="" />
       <tr><td bgcolor="$sidebg" colspan=2><img src="$iconpath/$lt{'auth'}" alt="User Authentication" /></td></tr>     <input type="hidden" name="udom" value="" />
       <tr>     <input type="hidden" name="localpath" value="$env{'form.localpath'}" />
        <td bgcolor="$mainbg"><br /><font size=-1><b>&nbsp;&nbsp;&nbsp;<label for="uname">$lt{'un'}</label>:</b></font></td>     <input type="hidden" name="localres" value="$env{'form.localres'}" />
        <td bgcolor="$mainbg"><br /><input type="text" name="uname" size="10" value="$authusername" /></td>    </form>
       </tr>  ENDSERVERFORM
       <tr>      my $coursecatalog;
        <td bgcolor="$mainbg"><font size=-1><b>&nbsp;&nbsp;&nbsp;<label for="upass$now">$lt{'pw'}</label>:</b></font></td>      if (($showcoursecat eq '') || ($showcoursecat)) {
        <td bgcolor="$mainbg"><input type="password" name="upass$now" size="10" /></td>          $coursecatalog = &coursecatalog_link($lt{'catalog'}).'<br />';
       </tr>      }
       <tr>      my $newuserlink;
        <td bgcolor="$mainbg"><font size=-1><b>&nbsp;&nbsp;&nbsp;<label for="udom">$lt{'dom'}</label>:</b></font></td>      if ($shownewuserlink) {
        <td bgcolor="$mainbg"><input type="text" name="udom" size="10" value="$authdomain" /></td>          $newuserlink = &newuser_link($lt{'newuser'}).'<br />';
       </tr>      }
       <tr>      my $logintitle =
        <td bgcolor="$mainbg">&nbsp;</td>          '<h2 class="LC_hcell"'
        <td bgcolor="$mainbg" valign="bottom" align="center">         .' style="background:'.$loginbox_header_bgcol.';'
         <br />         .' color:'.$loginbox_header_textcol.'">'
         <input type="submit" value="$lt{'log'}" />         .$lt{'log'}
        </td>         .'</h2>';
       </tr>  
       <tr>      my $noscript_warning='<noscript><span class="LC_warning"><b>'
        <td bgcolor="$mainbg" valign="bottom" align="left" colspan="2">                          .&mt('Use of LON-CAPA requires Javascript to be enabled in your web browser.')
         $loginhelp                          .'</b></span></noscript>';
         $forgotpw      my $helpdeskscript;
        </td>      my $contactblock = &contactdisplay(\%lt,$servadm,$showadminmail,
       </tr>                                         $authdomain,\$helpdeskscript,
      </table>                                         $showhelpdesk,\@possdoms);
      <!-- End sub-table -->  
     </form>      my $mobileargs;
 ENDLOGIN      if ($clientmobile) {
     if ($fullgraph) {          $mobileargs = 'autocapitalize="off" autocorrect="off"';
         my $helpdeskscript;      }
         my $contactblock = &contactdisplay(\%lt,$servadm,$showadminmail,      my $loginform=(<<LFORM);
                                   $version,$authdomain,\$helpdeskscript);  <form name="client" action="" onsubmit="return(send())">
  $r->print(<<ENDDOCUMENT);    <input type="hidden" name="lextkey" value="$lextkey" />
    </td>    <input type="hidden" name="uextkey" value="$uextkey" />
     <b><label for="uname">$lt{'un'}</label>:</b><br />
    <!-- Row 4 Column 2 -->    <input type="text" name="uname" id="uname" size="15" value="$authusername" readonly="readonly" $mobileargs /><br />
    <td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td>    <b><label for="upass$now">$lt{'pw'}</label>:</b><br />
     <input type="password" name="upass$now" id="upass$now" size="15" readonly="readonly" /><br />
    <!-- Row 4 Column 3 -->    <b><label for="udom">$lt{'dom'}</label>:</b><br />
 <td bgcolor="$mainbg">$announcements</td>    <input type="text" name="udom" id="udom" size="15" value="$authdomain" readonly="readonly" $mobileargs /><br />
     <input type="submit" value="$lt{'log'}" />
    <!-- Row 4 Column 4 -->  </form>
    <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td>  LFORM
   </tr>  
   <tr>      if ($showbanner) {
           $r->print(<<HEADER);
    <!-- Row 5 Column 1 -->  <!-- The LON-CAPA Header -->
    <td bgcolor="$sidebg" valign="middle" align="left">  <div style="background:$pgbg;margin:0;width:100%;">
      <br />    <img src="$img" border="0" alt="The Learning Online Network with CAPA" />
      <table border=0 cellspacing=0 cellpadding=0>  </div>
       <tr>  HEADER
        <td bgcolor="$sidebg" align="left" valign="top">      }
         <small><b>&nbsp;&nbsp;&nbsp;$lt{'dom'}:&nbsp;</b></small>      $r->print(<<ENDTOP);
        </td>  <div style="float:left;margin-top:0;">
        <td bgcolor="$sidebg" align="left" valign="top">  <div class="LC_Box" style="background:$loginbox_bg;">
         <small><tt>&nbsp;$domain</tt></small>    $logintitle
        </td>    $loginform
       </tr>    $noscript_warning
       <tr>  </div>
        <td bgcolor="$sidebg" align="left" valign="top">   
         <small><b>&nbsp;&nbsp;&nbsp;$lt{'serv'}:&nbsp;</b></small>  <div class="LC_Box" style="padding-top: 10px;">
        </td>    $loginhelp
        <td bgcolor="$sidebg" align="left" valign="top">    $forgotpw
         <small><tt>&nbsp;$lonhost ($role)</tt></small>    $contactblock
        </td>    $newuserlink
       </tr>    $coursecatalog
       <tr>  </div>
        <td bgcolor="$sidebg" align="left" valign="top">  </div>
         <small><b>&nbsp;&nbsp;&nbsp;$lt{'load'}:&nbsp;</b></small>  
        </td>  <div>
        <td bgcolor="$sidebg" align="left" valign="top">  ENDTOP
         <small><tt>&nbsp;$loadpercent $lt{'perc'}</tt></small>      if ($showmainlogo) {
        </td>          $r->print(' <img src="'.$logo.'" alt="" />'."\n");
       </tr>      }
       <tr>  $r->print(<<ENDTOP);
        <td bgcolor="$sidebg" align="left" valign="top">  $announcements
         <small><b>&nbsp;&nbsp;&nbsp;$lt{'userload'}:&nbsp;</b></small>  </div>
        </td>  <hr style="clear:both;" />
        <td bgcolor="$sidebg" align="left" valign="top">  ENDTOP
         <small><tt>&nbsp;$userloadpercent $lt{'perc'}</tt></small>      my ($domainrow,$serverrow,$loadrow,$userloadrow,$versionrow);
        </td>      $domainrow = <<"END";
       </tr>        <tr>
      </table>         <td  align="left" valign="top">
      <br />          <small><b>$lt{'dom'}:&nbsp;</b></small>
     $contactblock         </td>
    </td>         <td  align="left" valign="top">
           <small><tt>&nbsp;$domain</tt></small>
    <!-- Row 5 Column 2 -->         </td>
    <td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td>        </tr>
   END
    <!-- Row 5 Column 3 -->      $serverrow = <<"END";
    <td width="100%" valign="bottom" bgcolor="$mainbg">        <tr>
 $domainlogo         <td  align="left" valign="top">
 </td>          <small><b>$lt{'serv'}:&nbsp;</b></small>
          </td>
    <!-- Row 5 Column 4 -->         <td align="left" valign="top">
    <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td>          <small><tt>&nbsp;$lonhost ($role)</tt></small>
   </tr>         </td>
   <tr>        </tr>
   END
    <!-- Row 6 Column 1 -->      if ($loadlim) {
    <td bgcolor="$sidebg">&nbsp;</td>          $loadrow = <<"END";
         <tr>
    <!-- Row 6 Column 2 -->         <td align="left" valign="top">
    <td align="left" background="$iconpath/fillbottom.gif"><img src="$iconpath/lowerleft.gif" alt="" /></td>          <small><b>$lt{'load'}:&nbsp;</b></small>
          </td>
    <!-- Row 6 Column 3 -->         <td align="left" valign="top">
    <td background="$iconpath/fillbottom.gif"><img src="$iconpath/fillbottom.gif" alt="" /></td>          <small><tt>&nbsp;$loadpercent $lt{'perc'}</tt></small>
          </td>
    <!-- Row 6 Column 4 -->        </tr>
    <td align="right" background="$iconpath/fillbottom.gif"><img src="$iconpath/lowerright.gif" alt="" /></td>  END
   </tr>      }
  </table>      if ($uloadlim) {
           $userloadrow = <<"END";
 <script type="text/javascript">        <tr>
 // the if prevents the script error if the browser can not handle this         <td align="left" valign="top">
 if ( document.client.uname ) { document.client.uname.focus(); }          <small><b>$lt{'userload'}:&nbsp;</b></small>
 </script>         </td>
 $helpdeskscript         <td align="left" valign="top">
           <small><tt>&nbsp;$userloadpercent $lt{'perc'}</tt></small>
 ENDDOCUMENT         </td>
 }        </tr>
     $r->print('</body></html>');  END
     return OK;      }
 }      if (($version ne '') && ($version ne '<!-- VERSION -->')) {
           $versionrow = <<"END";
 sub contactdisplay {        <tr>
     my ($lt,$servadm,$showadminmail,$version,$authdomain,$helpdeskscript) = @_;         <td colspan="2" align="left">
     my $contactblock;          <small>$version</small>
     my $showhelpdesk = 0;         </td>
     my $requestmail = $Apache::lonnet::perlvar{'lonSupportEMail'};        </tr>
     if ($requestmail =~ m/^[^\@]+\@[^\@]+$/) {  END
         $showhelpdesk = 1;      }
     }  
     if ($servadm && $showadminmail) {      $r->print(<<ENDDOCUMENT);
         $contactblock .= '<b>&nbsp;&nbsp;&nbsp;'.$$lt{'servadm'}.':</b><br />'.      <div style="float: left;">
                          '<tt>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;'.$servadm.'</tt><br />&nbsp;<br />';       <table border="0" cellspacing="0" cellpadding="0">
     }  $domainrow
     if ($showhelpdesk) {  $serverrow
         $contactblock .= '<b>&nbsp;&nbsp;&nbsp;<a href="javascript:helpdesk()"><font size="+1">'.$lt->{'helpdesk'}.'</font></a></b><br />';  $loadrow    
         my $thisurl = &escape('/adm/login');  $userloadrow
         $$helpdeskscript = <<"ENDSCRIPT";  $versionrow
 <script type="text/javascript">       </table>
 function helpdesk() {      </div>
     var codedom = document.client.udom.value;      <div style="float: right;">
     if (codedom == '') {      $domainlogo
         codedom = "$authdomain";      </div>
     }      <br style="clear:both;" />
     var querystr = "origurl=$thisurl&codedom="+codedom;   </div>
     document.location.href = "/adm/helpdesk?"+querystr;  
     return;  <script type="text/javascript">
 }  // <![CDATA[
 </script>  // the if prevents the script error if the browser can not handle this
 ENDSCRIPT  if ( document.client.uname ) { document.client.uname.focus(); }
     }  // ]]>
     $contactblock .= <<"ENDBLOCK";  </script>
      &nbsp;&nbsp;&nbsp;$version  $helpdeskscript
 ENDBLOCK  
     return $contactblock;  ENDDOCUMENT
 }      my %endargs = ( 'noredirectlink' => 1, );
       $r->print(&Apache::loncommon::end_page(\%endargs));
 sub forgotpwdisplay {      return OK;
     my (%lt) = @_;  }
     my $prompt_for_resetpw = 1;   
     if ($prompt_for_resetpw) {  sub check_loginvia {
         return '<br />&nbsp;&nbsp;&nbsp;<a href="/adm/resetpw">'.$lt{'forgotpw'}.'</a></b><br /><br />';      my ($domain,$lonhost) = @_;
     }      if ($domain eq '' || $lonhost eq '') {
     return;          return;
 }      }
       my %domconfhash = &Apache::loncommon::get_domainconf($domain);
 sub loginhelpdisplay {      my $loginvia = $domconfhash{$domain.'.login.loginvia_'.$lonhost};
     my (%lt) = @_;      my $loginvia_exempt = $domconfhash{$domain.'.login.loginvia_exempt_'.$lonhost};
     my $login_help = 1;      my $output;
     if ($login_help) {      if ($loginvia ne '') {
         return '&nbsp;&nbsp;&nbsp;<a href="/adm/loginproblems.html">'.$lt{'help'}.'</a></b>';          my $noredirect;
     }          my $ip = $ENV{'REMOTE_ADDR'};
     return;          if ($ip eq '127.0.0.1') {
 }              $noredirect = 1;
           } else {
 sub coursecatalog_link {              if ($loginvia_exempt ne '') {
     my ($linkname) = @_;                  my @exempt = split(',',$loginvia_exempt);
     return <<"END";                  if (grep(/^\Q$ip\E$/,@exempt)) {
      <tr>                      $noredirect = 1;
       <td>&nbsp;</td>                  }
       <td><a href="/adm/coursecatalog"><b>$linkname</b></a></td>              }
      </tr>          }
 END          unless ($noredirect) {
 }              my ($newhost,$path);
               if ($loginvia =~ /:/) {
 1;                  ($newhost,$path) = split(':',$loginvia);
 __END__              } 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.1.96  
changed lines
  Added in v.1.165

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