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Diff for /loncom/auth/lonlogin.pm between versions 1.96 and 1.172

version 1.96, 2007/10/02 01:09:59 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 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 {   
     my $r = shift;  sub handler {
       my $r = shift;
     &Apache::loncommon::get_unprocessed_cgi  
  (join('&',$ENV{'QUERY_STRING'},$env{'request.querystring'},      &Apache::loncommon::get_unprocessed_cgi
       $ENV{'REDIRECT_QUERY_STRING'}),   (join('&',$ENV{'QUERY_STRING'},$env{'request.querystring'},
  ['interface','username','domain','firsturl','localpath','localres',        $ENV{'REDIRECT_QUERY_STRING'}),
   'token']);   ['interface','username','domain','firsturl','localpath','localres',
     'token','role','symb','iptoken']);
 # -- check if they are a migrating user      if (!defined($env{'form.firsturl'})) {
     if (defined($env{'form.token'})) {          &Apache::lonacc::get_posted_cgi($r,['firsturl']);
  return &Apache::migrateuser::handler($r);      }
     }      if (!defined($env{'form.firsturl'})) {
           if ($ENV{'REDIRECT_URL'} =~ m{^/+tiny/+$LONCAPA::match_domain/+\w+$}) {
     &Apache::loncommon::no_cache($r);              $env{'form.firsturl'} = $ENV{'REDIRECT_URL'};
     &Apache::lonlocal::get_language_handle($r);          }
     &Apache::loncommon::content_type($r,'text/html');      }
     $r->send_http_header;  
     return OK if $r->header_only;  # -- check if they are a migrating user
       if (defined($env{'form.token'})) {
    return &Apache::migrateuser::handler($r);
 # Are we re-routing?      }
     if (-e '/home/httpd/html/lon-status/reroute.txt') {  
  &Apache::lonauth::reroute($r);  # For "public user" - remove any exising "public" cookie, as user really wants to log-in
  return OK;      my ($handle,$lonidsdir,$expirepub,$userdom);
     }      unless ($r->header_only) {
           $handle = &Apache::lonnet::check_for_valid_session($r,'lonID',undef,\$userdom);
           if ($handle ne '') {
 # -------------------------------- Prevent users from attempting to login twice              $lonidsdir=$r->dir_config('lonIDsDir');
     my $handle = &Apache::lonnet::check_for_valid_session($r);              if ($handle=~/^publicuser\_/) {
     if ($handle=~/^publicuser\_/) {                  unlink($r->dir_config('lonIDsDir')."/$handle.id");
 # For "public user" - remove it, we apparently really want to login                  undef($handle);
  unlink($r->dir_config('lonIDsDir')."/$handle.id");                  undef($userdom);
     } elsif ($handle ne '') {                  $expirepub = 1;
 # Indeed, a valid token is found              }
  my $start_page =           }
     &Apache::loncommon::start_page('Already logged in');      }
  my $end_page =   
     &Apache::loncommon::end_page();      &Apache::loncommon::no_cache($r);
  $r->print(<<ENDFAILED);      &Apache::lonlocal::get_language_handle($r);
 $start_page      &Apache::loncommon::content_type($r,'text/html');
 <h1>You are already logged in</h1>      if ($expirepub) {
 <p>Please either <a href="/adm/roles">continue the current session</a> or          my $c = new CGI::Cookie(-name    => 'lonPubID',
 <a href="/adm/logout">logout</a>.</p>                                  -value   => '',
 <p>                                  -expires => '-10y',);
 <a href="/adm/loginproblems.html">Problems?</a></p>          $r->header_out('Set-cookie' => $c);
 $end_page      } elsif (($handle eq '') && ($userdom ne '')) {
 ENDFAILED          my $c = new CGI::Cookie(-name    => 'lonID',
         return OK;                                  -value   => '',
     }                                  -expires => '-10y',);
           $r->headers_out->add('Set-cookie' => $c);
 # ---------------------------------------------------- No valid token, continue      }
       $r->send_http_header;
  # ---------------------------- Not possible to really login to domain "public"      return OK if $r->header_only;
     if ($env{'form.domain'} eq 'public') {  
  $env{'form.domain'}='';  
  $env{'form.username'}='';  # Are we re-routing?
     }      my $londocroot = $r->dir_config('lonDocRoot');
 # ----------------------------------------------------------- Process Interface      if (-e "$londocroot/lon-status/reroute.txt") {
     $env{'form.interface'}=~s/\W//g;   &Apache::lonauth::reroute($r);
    return OK;
     my $textbrowsers=$r->dir_config('lonTextBrowsers');      }
     my $httpbrowser=$ENV{"HTTP_USER_AGENT"};  
       #
     foreach (split(/\:/,$textbrowsers)) {  # If browser sent an old cookie for which the session file had been removed
  if ($httpbrowser=~/$_/i) {  # check if configuration for user's domain has a portal URL set.  If so
     $env{'form.interface'}='textual';  # switch user's log-in to the portal.
         }  #
     }  
       if (($handle eq '') && ($userdom ne '')) {
     my $fullgraph=($env{'form.interface'} ne 'textual');          my %domdefaults = &Apache::lonnet::get_domain_defaults($userdom);
           if ($domdefaults{'portal_def'} =~ /^https?\:/) {
     my $iconpath=               my $start_page = &Apache::loncommon::start_page('Switching Server ...',undef,
  &Apache::loncommon::lonhttpdurl($r->dir_config('lonIconsURL'));                                            {'redirect' => [0,$domdefaults{'portal_def'}],});
               my $end_page   = &Apache::loncommon::end_page();
     my $domain = &Apache::lonnet::default_login_domain();              $r->print($start_page.$end_page);
     if (($env{'form.domain'}) &&               return OK;
  (&Apache::lonnet::domain($env{'form.domain'},'description'))) {          }
  $domain=$env{'form.domain'};      }
     }  
     my $role    = $r->dir_config('lonRole');      $env{'form.firsturl'} =~ s/(`)/'/g;
     my $loadlim = $r->dir_config('lonLoadLim');  
     my $servadm = $r->dir_config('lonAdmEMail');  # -------------------------------- Prevent users from attempting to login twice
     my $lonhost = $r->dir_config('lonHostID');      if ($handle ne '') {
     my $tabdir  = $r->dir_config('lonTabDir');          &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
     my $include = $r->dir_config('lonIncludes');   my $start_page =
     my $expire  = $r->dir_config('lonExpire');      &Apache::loncommon::start_page('Already logged in');
     my $version = $r->dir_config('lonVersion');   my $end_page =
     my $host_name = &Apache::lonnet::hostname($lonhost);      &Apache::loncommon::end_page();
           my $dest = '/adm/roles';
 # --------------------------------------------- Default values for login fields          if ($env{'form.firsturl'} ne '') {
               $dest = $env{'form.firsturl'};
     my $authusername=($env{'form.username'}?$env{'form.username'}:'');          }
     my $authdomain=($env{'form.domain'}?$env{'form.domain'}:$domain);   $r->print(
                     $start_page
 # ---------------------------------------------------------- Determine own load                   .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>'
     my $loadavg;                   .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].',
     {                    '<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>').'</p>'
  my $loadfile=Apache::File->new('/proc/loadavg');                   .$end_page
  $loadavg=<$loadfile>;                   );
     }          return OK;
     $loadavg =~ s/\s.*//g;      }
     my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);  
     my $userloadpercent=&Apache::lonnet::userload();  # ---------------------------------------------------- No valid token, continue
   
 # ------------------------------------------------------- Do the load balancing  # ---------------------------- Not possible to really login to domain "public"
     my $otherserver= &Apache::lonnet::absolute_url($host_name);      if ($env{'form.domain'} eq 'public') {
     my $firsturl=   $env{'form.domain'}='';
     ($env{'request.firsturl'}?$env{'request.firsturl'}:$env{'form.firsturl'});   $env{'form.username'}='';
 # ---------------------------------------- Are we access server and overloaded?      }
     if (($role eq 'access') &&  
  (($userloadpercent>100.0)||($loadpercent>100.0))) {  # ------ Is this page requested because /adm/migrateuser detected an IP change?
         my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent);      my %sessiondata;
  if ($unloaded) { $otherserver=$unloaded; }      if ($env{'form.iptoken'}) {
     }          %sessiondata = &Apache::lonnet::tmpget($env{'form.iptoken'});
           unless ($sessiondata{'sessionserver'}) {
 # ----------------------------------------------------------- Get announcements              my $delete = &Apache::lonnet::tmpdel($env{'form.iptoken'});
     my $announcements=&Apache::lonnet::getannounce();              delete($env{'form.iptoken'});
 # -------------------------------------------------------- Set login parameters          }
       }
     my @hexstr=('0','1','2','3','4','5','6','7',  # ----------------------------------------------------------- Process Interface
                 '8','9','a','b','c','d','e','f');      $env{'form.interface'}=~s/\W//g;
     my $lkey='';  
     for (0..7) {      (undef,undef,undef,undef,undef,undef,my $clientmobile) =
         $lkey.=$hexstr[rand(15)];          &Apache::loncommon::decode_user_agent();
     }  
       my $iconpath=
     my $ukey='';   &Apache::loncommon::lonhttpdurl($r->dir_config('lonIconsURL'));
     for (0..7) {  
         $ukey.=$hexstr[rand(15)];      my $lonhost = $r->dir_config('lonHostID');
     }      my $domain = &Apache::lonnet::default_login_domain();
       my $defdom = $domain;
     my $lextkey=hex($lkey);      if ($lonhost ne '') {
     if ($lextkey>2147483647) { $lextkey-=4294967296; }          unless ($sessiondata{'sessionserver'}) {
               my $redirect = &check_loginvia($domain,$lonhost);
     my $uextkey=hex($ukey);              if ($redirect) {
     if ($uextkey>2147483647) { $uextkey-=4294967296; }                  $r->print($redirect);
                   return OK;
 # -------------------------------------------------------- Store away log token              }
     my $logtoken=Apache::lonnet::reply(          }
        'tmpput:'.$ukey.$lkey.'&'.$firsturl,      }
        $lonhost);  
       if (($sessiondata{'domain'}) &&
 # ------------------- If we cannot talk to ourselves, we are in serious trouble          (&Apache::lonnet::domain($env{'form.domain'},'description'))) {
           $domain=$sessiondata{'domain'};
     if ($logtoken eq 'con_lost') {      } elsif (($env{'form.domain'}) &&
         my $spares='';   (&Apache::lonnet::domain($env{'form.domain'},'description'))) {
  my $last;   $domain=$env{'form.domain'};
         foreach my $hostid (sort      }
     {  
  &Apache::lonnet::hostname($a) cmp      my $role    = $r->dir_config('lonRole');
     &Apache::lonnet::hostname($b);      my $loadlim = $r->dir_config('lonLoadLim');
     }      my $uloadlim= $r->dir_config('lonUserLoadLim');
     keys(%Apache::lonnet::spareid)) {      my $servadm = $r->dir_config('lonAdmEMail');
             next if ($hostid eq $lonhost);      my $tabdir  = $r->dir_config('lonTabDir');
     my $hostname = &Apache::lonnet::hostname($hostid);      my $include = $r->dir_config('lonIncludes');
     next if ($last eq $hostname);      my $expire  = $r->dir_config('lonExpire');
             $spares.='<br /><font size="+1"><a href="http://'.      my $version = $r->dir_config('lonVersion');
                 $hostname.      my $host_name = &Apache::lonnet::hostname($lonhost);
                 '/adm/login?domain='.$authdomain.'">'.  
                 $hostname.'</a>'.  # --------------------------------------------- Default values for login fields
                 ' (preferred)</font>'.$/;     
     $last=$hostname;      my ($authusername,$authdomain);
         }      if ($sessiondata{'username'}) {
         $spares.= '<br />';          $authusername=$sessiondata{'username'};
  my %all_hostnames = &Apache::lonnet::all_hostnames();      } else {
         foreach my $hostid (sort          $env{'form.username'} = &Apache::loncommon::cleanup_html($env{'form.username'});
     {          $authusername=($env{'form.username'}?$env{'form.username'}:'');
  &Apache::lonnet::hostname($a) cmp      }
     &Apache::lonnet::hostname($b);      if ($sessiondata{'domain'}) {
     }          $authdomain=$sessiondata{'domain'};
     keys(%all_hostnames)) {      } else {
             next if ($hostid eq $lonhost || $Apache::lonnet::spareid{$hostid});          $env{'form.domain'} = &Apache::loncommon::cleanup_html($env{'form.domain'});
     my $hostname = &Apache::lonnet::hostname($hostid);          $authdomain=($env{'form.domain'}?$env{'form.domain'}:$domain);
             next if ($last eq $hostname);      }
             $spares.='<br /><a href="http://'.  
                 $hostname.  # ---------------------------------------------------------- Determine own load
                 '/adm/login?domain='.$authdomain.'">'.      my $loadavg;
                 $hostname.'</a>';      {
     $last=$hostname;   my $loadfile=Apache::File->new('/proc/loadavg');
         }   $loadavg=<$loadfile>;
  $r->print(<<ENDTROUBLE);      }
 <html>      $loadavg =~ s/\s.*//g;
 <head><title>The LearningOnline Network with CAPA</title></head>  
 <body bgcolor="#FFFFFF">      my ($loadpercent,$userloadpercent);
 <img src="/adm/lonKaputt/lonlogo_broken.gif" align="right" />      if ($loadlim) {
 <h3>This LON-CAPA server is temporarily not available for login</h3>          $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);
 <p>Please attempt to login to one of the following servers:</p>$spares      }
 </body>      if ($uloadlim) {
 </html>          $userloadpercent=&Apache::lonnet::userload();
 ENDTROUBLE      }
         return OK;  
     }      my $firsturl=
       ($env{'request.firsturl'}?$env{'request.firsturl'}:$env{'form.firsturl'});
 # ----------------------------------------------- Apparently we are in business  
     $servadm=~s/\,/\<br \/\>/g;  # ----------------------------------------------------------- Get announcements
       my $announcements=&Apache::lonnet::getannounce();
 # --------------------------------------------------- Print login screen header  # -------------------------------------------------------- Set login parameters
     $r->print(<<ENDHEADER);  
 <html>      my @hexstr=('0','1','2','3','4','5','6','7',
 <head>                  '8','9','a','b','c','d','e','f');
 <meta HTTP-EQUIV="Refresh" CONTENT="$expire; url=/adm/roles" />      my $lkey='';
 <title>The LearningOnline Network with CAPA Login</title>      for (0..7) {
 </head>          $lkey.=$hexstr[rand(15)];
 ENDHEADER      }
 # ---------------------------------------------------- Serve out DES JavaScript  
     {      my $ukey='';
  my $jsh=Apache::File->new($include."/londes.js");      for (0..7) {
         $r->print(<$jsh>);          $ukey.=$hexstr[rand(15)];
     }      }
   
 # ----------------------------------------------------------- Front page design      my $lextkey=hex($lkey);
     my $pgbg=      if ($lextkey>2147483647) { $lextkey-=4294967296; }
       ($fullgraph?&Apache::loncommon::designparm('login.pgbg',$domain):'#FFFFFF');  
     my $font=      my $uextkey=hex($ukey);
       ($fullgraph?&Apache::loncommon::designparm('login.font',$domain):'#000000');      if ($uextkey>2147483647) { $uextkey-=4294967296; }
     my $link=  
       ($fullgraph?&Apache::loncommon::designparm('login.link',$domain):'#0000FF');  # -------------------------------------------------------- Store away log token
     my $vlink=      my $tokenextras;
       ($fullgraph?&Apache::loncommon::designparm('login.vlink',$domain):'#0000FF');      if ($env{'form.role'}) {
     my $alink=&Apache::loncommon::designparm('login.alink',$domain);          $tokenextras = '&role='.&escape($env{'form.role'});
     my $mainbg=      }
       ($fullgraph?&Apache::loncommon::designparm('login.mainbg',$domain):'#FFFFFF');      if ($env{'form.symb'}) {
     my $sidebg=          if (!$tokenextras) {
       ($fullgraph?&Apache::loncommon::designparm('login.sidebg',$domain):'#FFFFFF');              $tokenextras = '&';
     my $logo=&Apache::loncommon::designparm('login.logo',$domain);          }
     my $img=&Apache::loncommon::designparm('login.img',$domain);          $tokenextras .= '&symb='.&escape($env{'form.symb'});
     my $domainlogo=&Apache::loncommon::domainlogo($domain);      }
     my $showadminmail=&Apache::loncommon::designparm('login.adminmail',                                                      $domain);      if ($env{'form.iptoken'}) {
     my $showcoursecat =          if (!$tokenextras) {
         &Apache::loncommon::designparm('login.coursecatalog',$domain);              $tokenextras = '&&';
           }
           $tokenextras .= '&iptoken='.&escape($env{'form.iptoken'});
 # ----------------------------------------------------------------------- Texts      }
       my $logtoken=Apache::lonnet::reply(
 my %lt=&Apache::lonlocal::texthash(         'tmpput:'.$ukey.$lkey.'&'.$firsturl.$tokenextras,
   'un'  => 'Username',         $lonhost);
   'pw'  => 'Password',  
   'dom' => 'Domain',  # -- If we cannot talk to ourselves, or hostID does not map to a hostname
   'perc' => 'percent',  #    we are in serious trouble
   'load' => 'Load',  
                   'userload' => 'User Load',      if (($logtoken eq 'con_lost') || ($logtoken eq 'no_such_host')) {
                   'about'  => 'About LON-CAPA',          if ($logtoken eq 'no_such_host') {
                   'access' => 'Accessibility Options',              &Apache::lonnet::logthis('No valid logtoken for log-in page -- unable to determine hostname for hostID: '.$lonhost.'. Check entry in hosts.tab');
                   'catalog' => 'Course Catalog',          }
   'auth' => 'userauthentication.gif',          my $spares='';
   'log' => 'Log in',   my $last;
   'help' => 'Log-in Help',          foreach my $hostid (sort
   'serv' => 'Server',      {
                   'servadm' => 'Server Administration',   &Apache::lonnet::hostname($a) cmp
                   'helpdesk' => 'Contact Helpdesk',      &Apache::lonnet::hostname($b);
                   'forgotpw' => 'Forgot password?');      }
 # -------------------------------------------------- Change password field name      keys(%Apache::lonnet::spareid)) {
     my $now=time;              next if ($hostid eq $lonhost);
     my $forgotpw = &forgotpwdisplay(%lt);      my $hostname = &Apache::lonnet::hostname($hostid);
     my $loginhelp = &loginhelpdisplay(%lt);      next if (($last eq $hostname) || ($hostname eq ''));
 # ---------------------------------------------------------- Serve rest of page              $spares.='<br /><font size="+1"><a href="http://'.
     $r->print(<<ENDSCRIPT);                  $hostname.
                   '/adm/login?domain='.$authdomain.'">'.
 <body bgcolor="$pgbg" text="$font" link="$link" vlink="$vlink" alink="$alink"                  $hostname.'</a>'.
   topmargin=0 leftmargin=0 marginwidth=0 marginheight=0>                  ' '.&mt('(preferred)').'</font>'.$/;
       $last=$hostname;
  <script language="JavaScript">          }
     function send()          if ($spares) {
     {              $spares.= '<br />';
  this.document.server.elements.uname.value          }
        =this.document.client.elements.uname.value;          my %all_hostnames = &Apache::lonnet::all_hostnames();
           foreach my $hostid (sort
         this.document.server.elements.udom.value      {
        =this.document.client.elements.udom.value;   &Apache::lonnet::hostname($a) cmp
       &Apache::lonnet::hostname($b);
         this.document.server.elements.imagesuppress.value      }
        =this.document.client.elements.imagesuppress.checked;      keys(%all_hostnames)) {
               next if ($hostid eq $lonhost || $Apache::lonnet::spareid{$hostid});
         this.document.server.elements.embedsuppress.value              my $hostname = &Apache::lonnet::hostname($hostid);
        =this.document.client.elements.embedsuppress.checked;              next if (($last eq $hostname) || ($hostname eq ''));
               $spares.='<br /><a href="http://'.
         this.document.server.elements.appletsuppress.value               $hostname.
        =this.document.client.elements.appletsuppress.checked;               '/adm/login?domain='.$authdomain.'">'.
                $hostname.'</a>';
         this.document.server.elements.fontenhance.value              $last=$hostname;
        =this.document.client.elements.fontenhance.checked;           }
            $r->print(
         this.document.server.elements.blackwhite.value     '<html>'
        =this.document.client.elements.blackwhite.checked;    .'<head><title>'
     .&mt('The LearningOnline Network with CAPA')
         this.document.server.elements.remember.value    .'</title></head>'
        =this.document.client.elements.remember.checked;    .'<body bgcolor="#FFFFFF">'
     .'<h1>'.&mt('The LearningOnline Network with CAPA').'</h1>'
         uextkey=this.document.client.elements.uextkey.value;    .'<img src="/adm/lonKaputt/lonlogo_broken.gif" align="right" />'
         lextkey=this.document.client.elements.lextkey.value;    .'<h3>'.&mt('This LON-CAPA server is temporarily not available for login.').'</h3>');
         initkeys();          if ($spares) {
               $r->print('<p>'.&mt('Please attempt to login to one of the following servers:')
         this.document.server.elements.upass0.value                       .'</p>'
     =crypted(this.document.client.elements.upass$now.value.substr(0,15));                       .$spares);
  this.document.server.elements.upass1.value          }
     =crypted(this.document.client.elements.upass$now.value.substr(15,15));          $r->print('</body>'
  this.document.server.elements.upass2.value                   .'</html>'
     =crypted(this.document.client.elements.upass$now.value.substr(30,15));          );
           return OK;
         this.document.client.elements.uname.value='';      }
         this.document.client.elements.upass$now.value='';  
   # ----------------------------------------------- Apparently we are in business
         this.document.server.submit();      $servadm=~s/\,/\<br \/\>/g;
  return false;  
     }  # ----------------------------------------------------------- Front page design
  </script>      my $pgbg=&Apache::loncommon::designparm('login.pgbg',$domain);
 ENDSCRIPT      my $font=&Apache::loncommon::designparm('login.font',$domain);
       my $link=&Apache::loncommon::designparm('login.link',$domain);
     if ($fullgraph) {      my $vlink=&Apache::loncommon::designparm('login.vlink',$domain);
  $r->print(      my $alink=&Apache::loncommon::designparm('login.alink',$domain);
   '<table width="100%" cellpadding=0 cellspacing=0 border=0>');      my $mainbg=&Apache::loncommon::designparm('login.mainbg',$domain);
     }      my $loginbox_bg=&Apache::loncommon::designparm('login.sidebg',$domain);
       my $loginbox_header_bgcol=&Apache::loncommon::designparm('login.bgcol',$domain);
     $r->print(<<ENDSERVERFORM);      my $loginbox_header_textcol=&Apache::loncommon::designparm('login.textcol',$domain);
   <form name="server" action="$otherserver/adm/authenticate" method="post" target="_top">      my $logo=&Apache::loncommon::designparm('login.logo',$domain);
    <input type="hidden" name="logtoken" value="$logtoken" />      my $img=&Apache::loncommon::designparm('login.img',$domain);
    <input type="hidden" name="serverid" value="$lonhost" />      my $domainlogo=&Apache::loncommon::domainlogo($domain);
    <input type="hidden" name="interface" value="$env{'form.interface'}" />      my $showbanner = 1;
    <input type="hidden" name="uname" value="" />      my $showmainlogo = 1;
    <input type="hidden" name="upass0" value="" />      if (defined(&Apache::loncommon::designparm('login.showlogo_img',$domain))) {
    <input type="hidden" name="upass1" value="" />          $showbanner = &Apache::loncommon::designparm('login.showlogo_img',$domain);
    <input type="hidden" name="upass2" value="" />      }
    <input type="hidden" name="udom" value="" />      if (defined(&Apache::loncommon::designparm('login.showlogo_logo',$domain))) {
    <input type="hidden" name="imagesuppress"  value="" />          $showmainlogo = &Apache::loncommon::designparm('login.showlogo_logo',$domain);
    <input type="hidden" name="appletsuppress"  value="" />      }
    <input type="hidden" name="embedsuppress"  value="" />      my $showadminmail;
    <input type="hidden" name="fontenhance"  value="" />      my @possdoms = &Apache::lonnet::current_machine_domains();
    <input type="hidden" name="blackwhite"  value="" />      if (grep(/^\Q$domain\E$/,@possdoms)) {
    <input type="hidden" name="remember"  value="" />          $showadminmail=&Apache::loncommon::designparm('login.adminmail',$domain);
    <input type="hidden" name="localpath" value="$env{'form.localpath'}" />      }
    <input type="hidden" name="localres" value="$env{'form.localres'}" />      my $showcoursecat =
   </form>          &Apache::loncommon::designparm('login.coursecatalog',$domain);
 ENDSERVERFORM      my $shownewuserlink =
     my $coursecatalog;          &Apache::loncommon::designparm('login.newuser',$domain);
     if (($showcoursecat eq '') || ($showcoursecat)) {      my $showhelpdesk =
         $coursecatalog = &coursecatalog_link($lt{'catalog'});          &Apache::loncommon::designparm('login.helpdesk',$domain);
     }      my $now=time;
     if ($fullgraph) { $r->print(<<ENDTOP);      my $js = (<<ENDSCRIPT);
   <!-- The LON-CAPA Header -->  
   <tr>  <script type="text/javascript" language="JavaScript">
   // <![CDATA[
    <!-- Row 1 Columns 2-4 -->  function send()
    <td width="100%" height=75 colspan=4 align="left" valign="top" bgcolor="$pgbg"><img src="$img" border=0 alt="The Learning Online Network with CAPA" /></td>  {
   </tr>  this.document.server.elements.uname.value
   =this.document.client.elements.uname.value;
   <!-- The gray bar that starts the two table frames -->  
   <tr>  this.document.server.elements.udom.value
   =this.document.client.elements.udom.value;
    <!-- Row 2 Column 1 -->  
    <td width=182 height=27 bgcolor="$sidebg">&nbsp;</td>  uextkey=this.document.client.elements.uextkey.value;
   lextkey=this.document.client.elements.lextkey.value;
    <!-- Row 2 Column 2 -->  initkeys();
    <td width=27 height=27 align="left" background="$iconpath/filltop.gif"><img src="$iconpath/upperleft.gif" border=0 alt="" /></td>  
   if(this.document.server.action.substr(0,5) === 'http:'){
    <!-- Row 2 Column 3 -->      this.document.server.elements.upass0.value
    <td height=27 background="$iconpath/filltop.gif"><img src="$iconpath/filltop.gif" alt="" /></td>          =getCrypted(this.document.client.elements.upass$now.value);
   } else {
    <!-- Row 2 Column 4 -->      this.document.server.elements.upass0.value
    <td width=27 height=27 align="right" background="$iconpath/filltop.gif"><img src="$iconpath/upperright.gif" border=0 alt="" /></td>          =this.document.client.elements.upass$now.value;
   </tr>  }
   <tr>  
      this.document.client.elements.uname.value='';
    <!-- A cell that will hold the 'access', 'about', and 'catalog' links -->  this.document.client.elements.upass$now.value='';
    <!-- Row 3 Column 1 -->  
    <td valign="top" height="60" align="left" bgcolor="$sidebg">  this.document.server.submit();
     <table cellpadding="0" cellspacing="2" border="0">  return false;
      <tr>  }
       <td>&nbsp;</td>  
       <td><a href="/adm/login?interface=textual"><b>$lt{'access'}</b></a></td>  function enableInput() {
      </tr>      this.document.client.elements.upass$now.removeAttribute("readOnly");
      <tr>      this.document.client.elements.uname.removeAttribute("readOnly");
       <td>&nbsp;</td>      this.document.client.elements.udom.removeAttribute("readOnly");
       <td><a href="/adm/about.html"><b>$lt{'about'}</b></a></td>      return;
      </tr>$coursecatalog  }
      <tr>  
       <td colspan="2">&nbsp;</td>  // ]]>
      </tr>  </script>
     </table>  
    </td>  ENDSCRIPT
    <!-- The shaded space between the two main columns -->  
    <!-- Row 3 Column 2 -->  # --------------------------------------------------- Print login screen header
    <td width=27 height=60 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td>  
       my %add_entries = (
    <!-- The right main column holding the large LON-CAPA logo-->         bgcolor      => "$mainbg",
    <!-- Rows 3-4 Column 3 -->         text         => "$font",
    <td align="center" valign="top" width="100%" height="100%" bgcolor="$mainbg">         link         => "$link",
     <center>         vlink        => "$vlink",
      <img src="$logo" alt="" />         alink        => "$alink",
     </center>                 onload       => 'javascript:enableInput();',);
    </td>  
       my ($lonhost_in_use,$headextra,$headextra_exempt,@hosts,%defaultdomconf);
    <!-- Row 3 Column 4 -->      @hosts = &Apache::lonnet::current_machine_ids();
    <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td>      $lonhost_in_use = $lonhost;
   </tr>      if (@hosts > 1) {
   <tr>          foreach my $hostid (@hosts) {
               if (&Apache::lonnet::host_domain($hostid) eq $defdom) {
    <!-- The entry form -->                  $lonhost_in_use = $hostid;
    <!-- Row 4 Column 1 -->                  last;
    <td align="center" valign="middle" bgcolor="$sidebg">              }
 ENDTOP          }
 } else {      }
     $r->print('<h1>The Learning<i>Online</i> Network with CAPA</h1><h2>Text-based Interface Login</h2>'.$announcements);      %defaultdomconf = &Apache::loncommon::get_domainconf($defdom);
 }      $headextra = $defaultdomconf{$defdom.'.login.headtag_'.$lonhost_in_use};
     $r->print('<form name="client" onsubmit="return(send())">');      $headextra_exempt = $defaultdomconf{$domain.'.login.headtag_exempt_'.$lonhost_in_use};
     unless ($fullgraph) {      if ($headextra) {
         $r->print(<<ENDACCESSOPTIONS);          my $omitextra;
 <h3>Select Accessibility Options</h3>          if ($headextra_exempt ne '') {
 <label><input type="checkbox" name="imagesuppress" /> Suppress rendering of images</label><br />              my @exempt = split(',',$headextra_exempt);
 <label><input type="checkbox" name="appletsuppress" /> Suppress Java applets</label><br />              my $ip = $ENV{'REMOTE_ADDR'};
 <label><input type="checkbox" name="embedsuppress" /> Suppress rendering of embedded multimedia</label><br />              if (grep(/^\Q$ip\E$/,@exempt)) {
 <label><input type="checkbox" name="fontenhance" /> Increase font size</label><br />                  $omitextra = 1;
 <label><input type="checkbox" name="blackwhite" /> Switch to black and white mode</label><br />              }
 <input type="checkbox" name="remember" /> Remember these settings for next login<hr />          }
 ENDACCESSOPTIONS          unless ($omitextra) {
 } else {              my $confname = $defdom.'-domainconfig';
     $r->print(<<ENDNOOPT);              if ($headextra =~ m{^\Q/res/$defdom/$confname/login/headtag/$lonhost_in_use/\E}) {
 <input type="hidden" name="imagesuppress"  value="" />                  my $extra = &Apache::lonnet::getfile(&Apache::lonnet::filelocation("",$headextra));
 <input type="hidden" name="embedsuppress"  value="" />                  unless ($extra eq '-1') {
 <input type="hidden" name="appletsuppress"  value="" />                      $js .= "\n".$extra."\n";
 <input type="hidden" name="fontenhance"  value="" />                  }
 <input type="hidden" name="blackwhite"  value="" />              }
 <input type="hidden" name="remember"  value="" />          }
 ENDNOOPT      }
 }  
     $r->print(<<ENDLOGIN);      $r->print(&Apache::loncommon::start_page('The LearningOnline Network with CAPA Login',$js,
      <input type="hidden" name="lextkey" value="$lextkey">         { 'redirect'       => [$expire,'/adm/roles'],
      <input type="hidden" name="uextkey" value="$uextkey">   'add_entries' => \%add_entries,
    'only_body'   => 1,}));
      <!-- Start the sub-table for text and input alignment -->  
      <table border=0 cellspacing=0 cellpadding=0>  # ----------------------------------------------------------------------- Texts
       <tr><td bgcolor="$sidebg" colspan=2><img src="$iconpath/$lt{'auth'}" alt="User Authentication" /></td></tr>  
       <tr>      my %lt=&Apache::lonlocal::texthash(
        <td bgcolor="$mainbg"><br /><font size=-1><b>&nbsp;&nbsp;&nbsp;<label for="uname">$lt{'un'}</label>:</b></font></td>            'un'       => 'Username',
        <td bgcolor="$mainbg"><br /><input type="text" name="uname" size="10" value="$authusername" /></td>            'pw'       => 'Password',
       </tr>            'dom'      => 'Domain',
       <tr>            'perc'     => 'percent',
        <td bgcolor="$mainbg"><font size=-1><b>&nbsp;&nbsp;&nbsp;<label for="upass$now">$lt{'pw'}</label>:</b></font></td>            'load'     => 'Server Load',
        <td bgcolor="$mainbg"><input type="password" name="upass$now" size="10" /></td>            'userload' => 'User Load',
       </tr>            'catalog'  => 'Course/Community Catalog',
       <tr>            'log'      => 'Log in',
        <td bgcolor="$mainbg"><font size=-1><b>&nbsp;&nbsp;&nbsp;<label for="udom">$lt{'dom'}</label>:</b></font></td>            'help'     => 'Log-in Help',
        <td bgcolor="$mainbg"><input type="text" name="udom" size="10" value="$authdomain" /></td>            'serv'     => 'Server',
       </tr>            'servadm'  => 'Server Administration',
       <tr>            'helpdesk' => 'Contact Helpdesk',
        <td bgcolor="$mainbg">&nbsp;</td>            'forgotpw' => 'Forgot password?',
        <td bgcolor="$mainbg" valign="bottom" align="center">            'newuser'  => 'New User?',
         <br />         );
         <input type="submit" value="$lt{'log'}" />  # -------------------------------------------------- Change password field name
        </td>  
       </tr>      my $forgotpw = &forgotpwdisplay(%lt);
       <tr>      $forgotpw .= '<br />' if $forgotpw;
        <td bgcolor="$mainbg" valign="bottom" align="left" colspan="2">      my $loginhelp = &Apache::lonauth::loginhelpdisplay($authdomain);
         $loginhelp      if ($loginhelp) {
         $forgotpw          $loginhelp = '<a href="'.$loginhelp.'">'.$lt{'help'}.'</a><br />';
        </td>      }
       </tr>  
      </table>  # ---------------------------------------------------- Serve out DES JavaScript
      <!-- End sub-table -->      {
     </form>      my $jsh=Apache::File->new($include."/londes.js");
 ENDLOGIN      $r->print(<$jsh>);
     if ($fullgraph) {      }
         my $helpdeskscript;  # ---------------------------------------------------------- Serve rest of page
         my $contactblock = &contactdisplay(\%lt,$servadm,$showadminmail,  
                                   $version,$authdomain,\$helpdeskscript);      $r->print(
  $r->print(<<ENDDOCUMENT);      '<div class="LC_Box"'
    </td>     .' style="margin:0 auto; padding:10px; width:90%; height: auto; background-color:#FFFFFF;">'
   );
    <!-- Row 4 Column 2 -->  
    <td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td>      $r->print(<<ENDSERVERFORM);
   <form name="server" action="/adm/authenticate" method="post" target="_top">
    <!-- Row 4 Column 3 -->     <input type="hidden" name="logtoken" value="$logtoken" />
 <td bgcolor="$mainbg">$announcements</td>     <input type="hidden" name="serverid" value="$lonhost" />
      <input type="hidden" name="uname" value="" />
    <!-- Row 4 Column 4 -->     <input type="hidden" name="upass0" value="" />
    <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td>     <input type="hidden" name="udom" value="" />
   </tr>     <input type="hidden" name="localpath" value="$env{'form.localpath'}" />
   <tr>     <input type="hidden" name="localres" value="$env{'form.localres'}" />
     </form>
    <!-- Row 5 Column 1 -->  ENDSERVERFORM
    <td bgcolor="$sidebg" valign="middle" align="left">      my $coursecatalog;
      <br />      if (($showcoursecat eq '') || ($showcoursecat)) {
      <table border=0 cellspacing=0 cellpadding=0>          $coursecatalog = &coursecatalog_link($lt{'catalog'}).'<br />';
       <tr>      }
        <td bgcolor="$sidebg" align="left" valign="top">      my $newuserlink;
         <small><b>&nbsp;&nbsp;&nbsp;$lt{'dom'}:&nbsp;</b></small>      if ($shownewuserlink) {
        </td>          $newuserlink = &newuser_link($lt{'newuser'}).'<br />';
        <td bgcolor="$sidebg" align="left" valign="top">      }
         <small><tt>&nbsp;$domain</tt></small>      my $logintitle =
        </td>          '<h2 class="LC_hcell"'
       </tr>         .' style="background:'.$loginbox_header_bgcol.';'
       <tr>         .' color:'.$loginbox_header_textcol.'">'
        <td bgcolor="$sidebg" align="left" valign="top">         .$lt{'log'}
         <small><b>&nbsp;&nbsp;&nbsp;$lt{'serv'}:&nbsp;</b></small>         .'</h2>';
        </td>  
        <td bgcolor="$sidebg" align="left" valign="top">      my $noscript_warning='<noscript><span class="LC_warning"><b>'
         <small><tt>&nbsp;$lonhost ($role)</tt></small>                          .&mt('Use of LON-CAPA requires Javascript to be enabled in your web browser.')
        </td>                          .'</b></span></noscript>';
       </tr>      my $helpdeskscript;
       <tr>      my $contactblock = &contactdisplay(\%lt,$servadm,$showadminmail,
        <td bgcolor="$sidebg" align="left" valign="top">                                         $authdomain,\$helpdeskscript,
         <small><b>&nbsp;&nbsp;&nbsp;$lt{'load'}:&nbsp;</b></small>                                         $showhelpdesk,\@possdoms);
        </td>  
        <td bgcolor="$sidebg" align="left" valign="top">      my $mobileargs;
         <small><tt>&nbsp;$loadpercent $lt{'perc'}</tt></small>      if ($clientmobile) {
        </td>          $mobileargs = 'autocapitalize="off" autocorrect="off"';
       </tr>      }
       <tr>      my $loginform=(<<LFORM);
        <td bgcolor="$sidebg" align="left" valign="top">  <form name="client" action="" onsubmit="return(send())">
         <small><b>&nbsp;&nbsp;&nbsp;$lt{'userload'}:&nbsp;</b></small>    <input type="hidden" name="lextkey" value="$lextkey" />
        </td>    <input type="hidden" name="uextkey" value="$uextkey" />
        <td bgcolor="$sidebg" align="left" valign="top">    <b><label for="uname">$lt{'un'}</label>:</b><br />
         <small><tt>&nbsp;$userloadpercent $lt{'perc'}</tt></small>    <input type="text" name="uname" id="uname" size="15" value="$authusername" readonly="readonly" $mobileargs /><br />
        </td>    <b><label for="upass$now">$lt{'pw'}</label>:</b><br />
       </tr>    <input type="password" name="upass$now" id="upass$now" size="15" readonly="readonly" /><br />
      </table>    <b><label for="udom">$lt{'dom'}</label>:</b><br />
      <br />    <input type="text" name="udom" id="udom" size="15" value="$authdomain" readonly="readonly" $mobileargs /><br />
     $contactblock    <input type="submit" value="$lt{'log'}" />
    </td>  </form>
   LFORM
    <!-- Row 5 Column 2 -->  
    <td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td>      if ($showbanner) {
           $r->print(<<HEADER);
    <!-- Row 5 Column 3 -->  <!-- The LON-CAPA Header -->
    <td width="100%" valign="bottom" bgcolor="$mainbg">  <div style="background:$pgbg;margin:0;width:100%;">
 $domainlogo    <img src="$img" border="0" alt="The Learning Online Network with CAPA" class="LC_maxwidth" />
 </td>  </div>
   HEADER
    <!-- Row 5 Column 4 -->      }
    <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td>      $r->print(<<ENDTOP);
   </tr>  <div style="float:left;margin-top:0;">
   <tr>  <div class="LC_Box" style="background:$loginbox_bg;">
     $logintitle
    <!-- Row 6 Column 1 -->    $loginform
    <td bgcolor="$sidebg">&nbsp;</td>    $noscript_warning
   </div>
    <!-- Row 6 Column 2 -->   
    <td align="left" background="$iconpath/fillbottom.gif"><img src="$iconpath/lowerleft.gif" alt="" /></td>  <div class="LC_Box" style="padding-top: 10px;">
     $loginhelp
    <!-- Row 6 Column 3 -->    $forgotpw
    <td background="$iconpath/fillbottom.gif"><img src="$iconpath/fillbottom.gif" alt="" /></td>    $contactblock
     $newuserlink
    <!-- Row 6 Column 4 -->    $coursecatalog
    <td align="right" background="$iconpath/fillbottom.gif"><img src="$iconpath/lowerright.gif" alt="" /></td>  </div>
   </tr>  </div>
  </table>  
   <div>
 <script type="text/javascript">  ENDTOP
 // the if prevents the script error if the browser can not handle this      if ($showmainlogo) {
 if ( document.client.uname ) { document.client.uname.focus(); }          $r->print(' <img src="'.$logo.'" alt="" class="LC_maxwidth" />'."\n");
 </script>      }
 $helpdeskscript  $r->print(<<ENDTOP);
   $announcements
 ENDDOCUMENT  </div>
 }  <hr style="clear:both;" />
     $r->print('</body></html>');  ENDTOP
     return OK;      my ($domainrow,$serverrow,$loadrow,$userloadrow,$versionrow);
 }      $domainrow = <<"END";
         <tr>
 sub contactdisplay {         <td  align="left" valign="top">
     my ($lt,$servadm,$showadminmail,$version,$authdomain,$helpdeskscript) = @_;          <small><b>$lt{'dom'}:&nbsp;</b></small>
     my $contactblock;         </td>
     my $showhelpdesk = 0;         <td  align="left" valign="top">
     my $requestmail = $Apache::lonnet::perlvar{'lonSupportEMail'};          <small><tt>&nbsp;$domain</tt></small>
     if ($requestmail =~ m/^[^\@]+\@[^\@]+$/) {         </td>
         $showhelpdesk = 1;        </tr>
     }  END
     if ($servadm && $showadminmail) {      $serverrow = <<"END";
         $contactblock .= '<b>&nbsp;&nbsp;&nbsp;'.$$lt{'servadm'}.':</b><br />'.        <tr>
                          '<tt>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;'.$servadm.'</tt><br />&nbsp;<br />';         <td  align="left" valign="top">
     }          <small><b>$lt{'serv'}:&nbsp;</b></small>
     if ($showhelpdesk) {         </td>
         $contactblock .= '<b>&nbsp;&nbsp;&nbsp;<a href="javascript:helpdesk()"><font size="+1">'.$lt->{'helpdesk'}.'</font></a></b><br />';         <td align="left" valign="top">
         my $thisurl = &escape('/adm/login');          <small><tt>&nbsp;$lonhost ($role)</tt></small>
         $$helpdeskscript = <<"ENDSCRIPT";         </td>
 <script type="text/javascript">        </tr>
 function helpdesk() {  END
     var codedom = document.client.udom.value;      if ($loadlim) {
     if (codedom == '') {          $loadrow = <<"END";
         codedom = "$authdomain";        <tr>
     }         <td align="left" valign="top">
     var querystr = "origurl=$thisurl&codedom="+codedom;          <small><b>$lt{'load'}:&nbsp;</b></small>
     document.location.href = "/adm/helpdesk?"+querystr;         </td>
     return;         <td align="left" valign="top">
 }          <small><tt>&nbsp;$loadpercent $lt{'perc'}</tt></small>
 </script>         </td>
 ENDSCRIPT        </tr>
     }  END
     $contactblock .= <<"ENDBLOCK";      }
      &nbsp;&nbsp;&nbsp;$version      if ($uloadlim) {
 ENDBLOCK          $userloadrow = <<"END";
     return $contactblock;        <tr>
 }         <td align="left" valign="top">
           <small><b>$lt{'userload'}:&nbsp;</b></small>
 sub forgotpwdisplay {         </td>
     my (%lt) = @_;         <td align="left" valign="top">
     my $prompt_for_resetpw = 1;           <small><tt>&nbsp;$userloadpercent $lt{'perc'}</tt></small>
     if ($prompt_for_resetpw) {         </td>
         return '<br />&nbsp;&nbsp;&nbsp;<a href="/adm/resetpw">'.$lt{'forgotpw'}.'</a></b><br /><br />';        </tr>
     }  END
     return;      }
 }      if (($version ne '') && ($version ne '<!-- VERSION -->')) {
           $versionrow = <<"END";
 sub loginhelpdisplay {        <tr>
     my (%lt) = @_;         <td colspan="2" align="left">
     my $login_help = 1;          <small>$version</small>
     if ($login_help) {         </td>
         return '&nbsp;&nbsp;&nbsp;<a href="/adm/loginproblems.html">'.$lt{'help'}.'</a></b>';        </tr>
     }  END
     return;      }
 }  
       $r->print(<<ENDDOCUMENT);
 sub coursecatalog_link {      <div style="float: left;">
     my ($linkname) = @_;       <table border="0" cellspacing="0" cellpadding="0">
     return <<"END";  $domainrow
      <tr>  $serverrow
       <td>&nbsp;</td>  $loadrow    
       <td><a href="/adm/coursecatalog"><b>$linkname</b></a></td>  $userloadrow
      </tr>  $versionrow
 END       </table>
 }      </div>
       <div style="float: right;">
 1;      $domainlogo
 __END__      </div>
       <br style="clear:both;" />
    </div>
   
   <script type="text/javascript">
   // <![CDATA[
   // the if prevents the script error if the browser can not handle this
   if ( document.client.uname ) { document.client.uname.focus(); }
   // ]]>
   </script>
   $helpdeskscript
   
   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.1.96  
changed lines
  Added in v.1.172

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