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Diff for /loncom/auth/lonlogin.pm between versions 1.107 and 1.163

version 1.107, 2008/11/22 19:07:02 version 1.163, 2015/06/06 14:08:58
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'})) {      if (!defined($env{'form.firsturl'})) {
         &Apache::lonacc::get_posted_cgi($r,['firsturl']);          &Apache::lonacc::get_posted_cgi($r,['firsturl']);
     }      }
   
 # -- check if they are a migrating user  # -- check if they are a migrating user
     if (defined($env{'form.token'})) {      if (defined($env{'form.token'})) {
  return &Apache::migrateuser::handler($r);   return &Apache::migrateuser::handler($r);
     }      }
   
     &Apache::loncommon::no_cache($r);      &Apache::loncommon::no_cache($r);
     &Apache::lonlocal::get_language_handle($r);      &Apache::lonlocal::get_language_handle($r);
     &Apache::loncommon::content_type($r,'text/html');      &Apache::loncommon::content_type($r,'text/html');
     $r->send_http_header;      $r->send_http_header;
     return OK if $r->header_only;      return OK if $r->header_only;
   
   
 # Are we re-routing?  # Are we re-routing?
     if (-e '/home/httpd/html/lon-status/reroute.txt') {      my $londocroot = $r->dir_config('lonDocRoot');
  &Apache::lonauth::reroute($r);      if (-e "$londocroot/lon-status/reroute.txt") {
  return OK;   &Apache::lonauth::reroute($r);
     }   return OK;
       }
   
 # -------------------------------- Prevent users from attempting to login twice      $env{'form.firsturl'} =~ s/(`)/'/g;
     my $handle = &Apache::lonnet::check_for_valid_session($r);  
     if ($handle=~/^publicuser\_/) {  # -------------------------------- Prevent users from attempting to login twice
 # For "public user" - remove it, we apparently really want to login      my $handle = &Apache::lonnet::check_for_valid_session($r);
  unlink($r->dir_config('lonIDsDir')."/$handle.id");      if ($handle ne '') {
     } elsif ($handle ne '') {          my $lonidsdir=$r->dir_config('lonIDsDir');
 # Indeed, a valid token is found          if ($handle=~/^publicuser\_/) {
  my $start_page =   # For "public user" - remove it, we apparently really want to login
     &Apache::loncommon::start_page('Already logged in');      unlink($r->dir_config('lonIDsDir')."/$handle.id");
  my $end_page =           } else {
     &Apache::loncommon::end_page();  # Indeed, a valid token is found
  $r->print(              &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
                   $start_page      my $start_page =
                  .'<h1>'.&mt('You are already logged in!').'</h1>'          &Apache::loncommon::start_page('Already logged in');
                  .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]logout[_4].',      my $end_page =
                   '<a href="/adm/roles">','</a>','<a href="/adm/logout">','</a>').'</p>'          &Apache::loncommon::end_page();
                  .'<p><a href="/adm/loginproblems.html">'.&mt('Login problems?').'</a></p>'              my $dest = '/adm/roles';
                  .$end_page              if ($env{'form.firsturl'} ne '') {
                  );                  $dest = $env{'form.firsturl'};
         return OK;              }
     }      $r->print(
                     $start_page
 # ---------------------------------------------------- No valid token, continue                   .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>'
                    .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].',
  # ---------------------------- Not possible to really login to domain "public"                    '<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>').'</p>'
     if ($env{'form.domain'} eq 'public') {                   .$end_page
  $env{'form.domain'}='';                   );
  $env{'form.username'}='';              return OK;
     }          }
 # ----------------------------------------------------------- Process Interface      }
     $env{'form.interface'}=~s/\W//g;  
   # ---------------------------------------------------- No valid token, continue
    # my $textbrowsers=$r->dir_config('lonTextBrowsers');  
     my $httpbrowser=$ENV{"HTTP_USER_AGENT"};  # ---------------------------- Not possible to really login to domain "public"
           if ($env{'form.domain'} eq 'public') {
    # foreach (split(/\:/,$textbrowsers)) {   $env{'form.domain'}='';
 # if ($httpbrowser=~/$_/i) {   $env{'form.username'}='';
 #    $env{'form.interface'}='textual';      }
 #        }  
 #    }  # ------ Is this page requested because /adm/migrateuser detected an IP change?
       my %sessiondata;
     my $fullgraph=($env{'form.interface'} ne 'textual');      if ($env{'form.iptoken'}) {
           %sessiondata = &Apache::lonnet::tmpget($env{'form.iptoken'});
     my $iconpath=           unless ($sessiondata{'sessionserver'}) {
  &Apache::loncommon::lonhttpdurl($r->dir_config('lonIconsURL'));              my $delete = &Apache::lonnet::tmpdel($env{'form.iptoken'});
               delete($env{'form.iptoken'});
     my $domain = &Apache::lonnet::default_login_domain();          }
     if (($env{'form.domain'}) &&       }
  (&Apache::lonnet::domain($env{'form.domain'},'description'))) {  # ----------------------------------------------------------- Process Interface
  $domain=$env{'form.domain'};      $env{'form.interface'}=~s/\W//g;
     }  
     my $role    = $r->dir_config('lonRole');      (undef,undef,undef,undef,undef,undef,my $clientmobile) =
     my $loadlim = $r->dir_config('lonLoadLim');          &Apache::loncommon::decode_user_agent();
     my $servadm = $r->dir_config('lonAdmEMail');  
     my $lonhost = $r->dir_config('lonHostID');      my $iconpath=
     my $tabdir  = $r->dir_config('lonTabDir');   &Apache::loncommon::lonhttpdurl($r->dir_config('lonIconsURL'));
     my $include = $r->dir_config('lonIncludes');  
     my $expire  = $r->dir_config('lonExpire');      my $lonhost = $r->dir_config('lonHostID');
     my $version = $r->dir_config('lonVersion');      my $domain = &Apache::lonnet::default_login_domain();
     my $host_name = &Apache::lonnet::hostname($lonhost);      my $defdom = $domain;
       if ($lonhost ne '') {
 # --------------------------------------------- Default values for login fields          unless ($sessiondata{'sessionserver'}) {
               my $redirect = &check_loginvia($domain,$lonhost);
     my $authusername=($env{'form.username'}?$env{'form.username'}:'');              if ($redirect) {
     my $authdomain=($env{'form.domain'}?$env{'form.domain'}:$domain);                  $r->print($redirect);
                   return OK;
 # ---------------------------------------------------------- Determine own load              }
     my $loadavg;          }
     {      }
  my $loadfile=Apache::File->new('/proc/loadavg');  
  $loadavg=<$loadfile>;      if (($sessiondata{'domain'}) &&
     }          (&Apache::lonnet::domain($env{'form.domain'},'description'))) {
     $loadavg =~ s/\s.*//g;          $domain=$sessiondata{'domain'};
     my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);      } elsif (($env{'form.domain'}) &&
     my $userloadpercent=&Apache::lonnet::userload();   (&Apache::lonnet::domain($env{'form.domain'},'description'))) {
    $domain=$env{'form.domain'};
 # ------------------------------------------------------- Do the load balancing      }
     my $otherserver= &Apache::lonnet::absolute_url($host_name);  
     my $firsturl=      my $role    = $r->dir_config('lonRole');
     ($env{'request.firsturl'}?$env{'request.firsturl'}:$env{'form.firsturl'});      my $loadlim = $r->dir_config('lonLoadLim');
 # ---------------------------------------------------------- Are we overloaded?      my $uloadlim= $r->dir_config('lonUserLoadLim');
     if ((($userloadpercent>100.0)||($loadpercent>100.0))) {      my $servadm = $r->dir_config('lonAdmEMail');
         my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent);      my $tabdir  = $r->dir_config('lonTabDir');
  if ($unloaded) { $otherserver=$unloaded; }      my $include = $r->dir_config('lonIncludes');
     }      my $expire  = $r->dir_config('lonExpire');
       my $version = $r->dir_config('lonVersion');
 # ----------------------------------------------------------- Get announcements      my $host_name = &Apache::lonnet::hostname($lonhost);
     my $announcements=&Apache::lonnet::getannounce();  
 # -------------------------------------------------------- Set login parameters  # --------------------------------------------- Default values for login fields
      
     my @hexstr=('0','1','2','3','4','5','6','7',      my ($authusername,$authdomain);
                 '8','9','a','b','c','d','e','f');      if ($sessiondata{'username'}) {
     my $lkey='';          $authusername=$sessiondata{'username'};
     for (0..7) {      } else {
         $lkey.=$hexstr[rand(15)];          $env{'form.username'} = &Apache::loncommon::cleanup_html($env{'form.username'});
     }          $authusername=($env{'form.username'}?$env{'form.username'}:'');
       }
     my $ukey='';      if ($sessiondata{'domain'}) {
     for (0..7) {          $authdomain=$sessiondata{'domain'};
         $ukey.=$hexstr[rand(15)];      } else {
     }          $env{'form.domain'} = &Apache::loncommon::cleanup_html($env{'form.domain'});
           $authdomain=($env{'form.domain'}?$env{'form.domain'}:$domain);
     my $lextkey=hex($lkey);      }
     if ($lextkey>2147483647) { $lextkey-=4294967296; }  
   # ---------------------------------------------------------- Determine own load
     my $uextkey=hex($ukey);      my $loadavg;
     if ($uextkey>2147483647) { $uextkey-=4294967296; }      {
    my $loadfile=Apache::File->new('/proc/loadavg');
 # -------------------------------------------------------- Store away log token   $loadavg=<$loadfile>;
     my $logtoken=Apache::lonnet::reply(      }
        'tmpput:'.$ukey.$lkey.'&'.$firsturl,      $loadavg =~ s/\s.*//g;
        $lonhost);  
       my ($loadpercent,$userloadpercent);
 # ------------------- If we cannot talk to ourselves, we are in serious trouble      if ($loadlim) {
           $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);
     if ($logtoken eq 'con_lost') {      }
         my $spares='';      if ($uloadlim) {
  my $last;          $userloadpercent=&Apache::lonnet::userload();
         foreach my $hostid (sort      }
     {  
  &Apache::lonnet::hostname($a) cmp      my $firsturl=
     &Apache::lonnet::hostname($b);      ($env{'request.firsturl'}?$env{'request.firsturl'}:$env{'form.firsturl'});
     }  
     keys(%Apache::lonnet::spareid)) {  # ----------------------------------------------------------- Get announcements
             next if ($hostid eq $lonhost);      my $announcements=&Apache::lonnet::getannounce();
     my $hostname = &Apache::lonnet::hostname($hostid);  # -------------------------------------------------------- Set login parameters
     next if ($last eq $hostname);  
             $spares.='<br /><font size="+1"><a href="http://'.      my @hexstr=('0','1','2','3','4','5','6','7',
                 $hostname.                  '8','9','a','b','c','d','e','f');
                 '/adm/login?domain='.$authdomain.'">'.      my $lkey='';
                 $hostname.'</a>'.      for (0..7) {
                 ' '.&mt('(preferred)').'</font>'.$/;          $lkey.=$hexstr[rand(15)];
     $last=$hostname;      }
         }  
 $spares.= '<br />';      my $ukey='';
 my %all_hostnames = &Apache::lonnet::all_hostnames();      for (0..7) {
 foreach my $hostid (sort          $ukey.=$hexstr[rand(15)];
     {      }
  &Apache::lonnet::hostname($a) cmp  
     &Apache::lonnet::hostname($b);      my $lextkey=hex($lkey);
     }      if ($lextkey>2147483647) { $lextkey-=4294967296; }
     keys(%all_hostnames)) {  
     next if ($hostid eq $lonhost || $Apache::lonnet::spareid{$hostid});      my $uextkey=hex($ukey);
     my $hostname = &Apache::lonnet::hostname($hostid);      if ($uextkey>2147483647) { $uextkey-=4294967296; }
     next if ($last eq $hostname);  
     $spares.='<br /><a href="http://'.  # -------------------------------------------------------- Store away log token
  $hostname.      my $tokenextras;
  '/adm/login?domain='.$authdomain.'">'.      if ($env{'form.role'}) {
  $hostname.'</a>';          $tokenextras = '&role='.&escape($env{'form.role'});
     $last=$hostname;      }
 }      if ($env{'form.symb'}) {
 $r->print(          if (!$tokenextras) {
    '<html>'              $tokenextras = '&';
   .'<head><title>'          }
   .&mt('The LearningOnline Network with CAPA')          $tokenextras .= '&symb='.&escape($env{'form.symb'});
   .'</title></head>'      }
   .'<body bgcolor="#FFFFFF">'      if ($env{'form.iptoken'}) {
   .'<h1>'.&mt('The LearningOnline Network with CAPA').'</h1>'          if (!$tokenextras) {
   .'<img src="/adm/lonKaputt/lonlogo_broken.gif" align="right" />'              $tokenextras = '&&';
   .'<h3>'.&mt('This LON-CAPA server is temporarily not available for login.').'</h3>'          }
   .'<p>'.&mt('Please attempt to login to one of the following servers:').'</p>'          $tokenextras .= '&iptoken='.&escape($env{'form.iptoken'});
   .$spares      }
   .'</body>'      my $logtoken=Apache::lonnet::reply(
   .'</html>'         'tmpput:'.$ukey.$lkey.'&'.$firsturl.$tokenextras,
 );         $lonhost);
 return OK;  
 }  # -- If we cannot talk to ourselves, or hostID does not map to a hostname
   #    we are in serious trouble
 # ----------------------------------------------- Apparently we are in business  
 $servadm=~s/\,/\<br \/\>/g;      if (($logtoken eq 'con_lost') || ($logtoken eq 'no_such_host')) {
           if ($logtoken eq 'no_such_host') {
 # ----------------------------------------------------------- Front page design              &Apache::lonnet::logthis('No valid logtoken for log-in page -- unable to determine hostname for hostID: '.$lonhost.'. Check entry in hosts.tab');
 my $pgbg=          }
 ($fullgraph?&Apache::loncommon::designparm('login.pgbg',$domain):'#FFFFFF');          my $spares='';
 my $font=   my $last;
 ($fullgraph?&Apache::loncommon::designparm('login.font',$domain):'#000000');          foreach my $hostid (sort
 my $link=      {
 ($fullgraph?&Apache::loncommon::designparm('login.link',$domain):'#0000FF');   &Apache::lonnet::hostname($a) cmp
 my $vlink=      &Apache::lonnet::hostname($b);
 ($fullgraph?&Apache::loncommon::designparm('login.vlink',$domain):'#0000FF');      }
 my $alink=&Apache::loncommon::designparm('login.alink',$domain);      keys(%Apache::lonnet::spareid)) {
 my $mainbg=              next if ($hostid eq $lonhost);
 ($fullgraph?&Apache::loncommon::designparm('login.mainbg',$domain):'#FFFFFF');      my $hostname = &Apache::lonnet::hostname($hostid);
 my $sidebg=      next if (($last eq $hostname) || ($hostname eq ''));
 ($fullgraph?&Apache::loncommon::designparm('login.sidebg',$domain):'#FFFFFF');              $spares.='<br /><font size="+1"><a href="http://'.
 my $textcol =                   $hostname.
 ($fullgraph?&Apache::loncommon::designparm('login.textcol',$domain):'#000000');                  '/adm/login?domain='.$authdomain.'">'.
 my $bgcol =                  $hostname.'</a>'.
 ($fullgraph?&Apache::loncommon::designparm('login.bgcol',$domain):'#FFFFFF');                  ' '.&mt('(preferred)').'</font>'.$/;
 my $logo=&Apache::loncommon::designparm('login.logo',$domain);      $last=$hostname;
 my $img=&Apache::loncommon::designparm('login.img',$domain);          }
 my $domainlogo=&Apache::loncommon::domainlogo($domain);          if ($spares) {
 my $login=&Apache::loncommon::designparm('login.login',$domain);              $spares.= '<br />';
 if ($login eq '') {          }
 $login = $iconpath.'/'.&mt('userauthentication.gif');          my %all_hostnames = &Apache::lonnet::all_hostnames();
 }          foreach my $hostid (sort
 my $showadminmail=&Apache::loncommon::designparm('login.adminmail',$domain);      {
 my $showcoursecat =   &Apache::lonnet::hostname($a) cmp
 &Apache::loncommon::designparm('login.coursecatalog',$domain);      &Apache::lonnet::hostname($b);
 my $loginheader =&Apache::loncommon::designparm('login.loginheader',$domain);      }
 my $shownewuserlink =       keys(%all_hostnames)) {
 &Apache::loncommon::designparm('login.newuser',$domain);              next if ($hostid eq $lonhost || $Apache::lonnet::spareid{$hostid});
 my $now=time;              my $hostname = &Apache::lonnet::hostname($hostid);
 my $js = (<<ENDSCRIPT);              next if (($last eq $hostname) || ($hostname eq ''));
               $spares.='<br /><a href="http://'.
 <script language="JavaScript">               $hostname.
 function send()               '/adm/login?domain='.$authdomain.'">'.
 {               $hostname.'</a>';
 this.document.server.elements.uname.value              $last=$hostname;
 =this.document.client.elements.uname.value;           }
            $r->print(
 this.document.server.elements.udom.value     '<html>'
 =this.document.client.elements.udom.value;    .'<head><title>'
     .&mt('The LearningOnline Network with CAPA')
 uextkey=this.document.client.elements.uextkey.value;    .'</title></head>'
 lextkey=this.document.client.elements.lextkey.value;    .'<body bgcolor="#FFFFFF">'
 initkeys();    .'<h1>'.&mt('The LearningOnline Network with CAPA').'</h1>'
     .'<img src="/adm/lonKaputt/lonlogo_broken.gif" align="right" />'
 this.document.server.elements.upass0.value    .'<h3>'.&mt('This LON-CAPA server is temporarily not available for login.').'</h3>');
     =crypted(this.document.client.elements.upass$now.value.substr(0,15));          if ($spares) {
 this.document.server.elements.upass1.value              $r->print('<p>'.&mt('Please attempt to login to one of the following servers:')
     =crypted(this.document.client.elements.upass$now.value.substr(15,15));                       .'</p>'
 this.document.server.elements.upass2.value                       .$spares);
     =crypted(this.document.client.elements.upass$now.value.substr(30,15));          }
           $r->print('</body>'
 this.document.client.elements.uname.value='';                   .'</html>'
 this.document.client.elements.upass$now.value='';          );
           return OK;
 this.document.server.submit();      }
 return false;  
 }  # ----------------------------------------------- Apparently we are in business
 </script>      $servadm=~s/\,/\<br \/\>/g;
   
 ENDSCRIPT  # ----------------------------------------------------------- Front page design
       my $pgbg=&Apache::loncommon::designparm('login.pgbg',$domain);
 # --------------------------------------------------- Print login screen header      my $font=&Apache::loncommon::designparm('login.font',$domain);
       my $link=&Apache::loncommon::designparm('login.link',$domain);
 my %add_entries = (topmargin    => "0",      my $vlink=&Apache::loncommon::designparm('login.vlink',$domain);
        leftmargin   => "0",      my $alink=&Apache::loncommon::designparm('login.alink',$domain);
        marginheight => "0",      my $mainbg=&Apache::loncommon::designparm('login.mainbg',$domain);
        marginwidth  => "0",      my $loginbox_bg=&Apache::loncommon::designparm('login.sidebg',$domain);
        bgcolor      => "$pgbg",      my $loginbox_header_bgcol=&Apache::loncommon::designparm('login.bgcol',$domain);
        text         => "$font",      my $loginbox_header_textcol=&Apache::loncommon::designparm('login.textcol',$domain);
        link         => "$link",      my $logo=&Apache::loncommon::designparm('login.logo',$domain);
        vlink        => "$vlink",      my $img=&Apache::loncommon::designparm('login.img',$domain);
        alink        => "$alink",);      my $domainlogo=&Apache::loncommon::domainlogo($domain);
       my $showbanner = 1;
 $r->print(&Apache::loncommon::start_page('The LearningOnline Network with CAPA Login',$js,      my $showmainlogo = 1;
        { 'redirect'       => [$expire,'/adm/roles'],       if (defined(&Apache::loncommon::designparm('login.showlogo_img',$domain))) {
  'add_entries' => \%add_entries,          $showbanner = &Apache::loncommon::designparm('login.showlogo_img',$domain);
  'only_body'   => 1,}));      }
       if (defined(&Apache::loncommon::designparm('login.showlogo_logo',$domain))) {
 # ----------------------------------------------------------------------- Texts          $showmainlogo = &Apache::loncommon::designparm('login.showlogo_logo',$domain);
       }
 my %lt=&Apache::lonlocal::texthash(      my $showadminmail;
   'un'  => 'Username',      my @possdoms = &Apache::lonnet::current_machine_domains();
   'pw'  => 'Password',      if (grep(/^\Q$domain\E$/,@possdoms)) {
   'dom' => 'Domain',          $showadminmail=&Apache::loncommon::designparm('login.adminmail',$domain);
   'perc' => 'percent',      }
   'load' => 'Server Load',      my $showcoursecat =
   'userload' => 'User Load',          &Apache::loncommon::designparm('login.coursecatalog',$domain);
   'about'  => 'About LON-CAPA',      my $shownewuserlink =
   'catalog' => 'Course Catalog',          &Apache::loncommon::designparm('login.newuser',$domain);
   'log' => 'Log in',      my $showhelpdesk =
   'help' => 'Log-in Help',          &Apache::loncommon::designparm('login.helpdesk',$domain);
   'serv' => 'Server',      my $now=time;
   'servadm' => 'Server Administration',      my $js = (<<ENDSCRIPT);
   'helpdesk' => 'Contact Helpdesk',  
   'forgotpw' => 'Forgot password?',  <script type="text/javascript" language="JavaScript">
   'newuser'  => 'New User?',  // <![CDATA[
   'options_headline' => 'Select Accessibility Options',  function send()
   'sprs_img' => 'Suppress rendering of images',  {
   'sprs_applet' => 'Suppress Java applets',  this.document.server.elements.uname.value
   'sprs_embed' => 'Suppress rendering of embedded multimedia',  =this.document.client.elements.uname.value;
   'sprs_font' => 'Increase font size',  
   'sprs_blackwhite' => 'Switch to black and white mode',  this.document.server.elements.udom.value
   'remember' => 'Remember these settings for next login');  =this.document.client.elements.udom.value;
 # -------------------------------------------------- Change password field name  
 my $forgotpw = &forgotpwdisplay(%lt);  uextkey=this.document.client.elements.uextkey.value;
 my $loginhelp = &loginhelpdisplay(%lt);  lextkey=this.document.client.elements.lextkey.value;
   initkeys();
 # ---------------------------------------------------- Serve out DES JavaScript  
 {  this.document.server.elements.upass0.value
 my $jsh=Apache::File->new($include."/londes.js");      =this.document.client.elements.upass$now.value.substr(0,15);
 $r->print(<$jsh>);  this.document.server.elements.upass1.value
 }      =this.document.client.elements.upass$now.value.substr(15,15);
 # ---------------------------------------------------------- Serve rest of page  this.document.server.elements.upass2.value
       =this.document.client.elements.upass$now.value.substr(30,15);
 if ($fullgraph) {  
 $r->print(  if(this.document.server.action.substr(0,5) === 'http:'){
   '<div class="LC_loginpage_container">');      for (var idx in [1,2,3]){
 }          this.document.server.elements['upass' + idx].value =
               crypted(this.document.server.elements['upass' + idx].value);
 $r->print(<<ENDSERVERFORM);      }
 <form name="server" action="$otherserver/adm/authenticate" method="post" target="_top">  }
    <input type="hidden" name="logtoken" value="$logtoken" />  
    <input type="hidden" name="serverid" value="$lonhost" />  this.document.client.elements.uname.value='';
    <input type="hidden" name="uname" value="" />  this.document.client.elements.upass$now.value='';
    <input type="hidden" name="upass0" value="" />  
    <input type="hidden" name="upass1" value="" />  this.document.server.submit();
    <input type="hidden" name="upass2" value="" />  return false;
    <input type="hidden" name="udom" value="" />  }
    <input type="hidden" name="localpath" value="$env{'form.localpath'}" />  
    <input type="hidden" name="localres" value="$env{'form.localres'}" />  function enableInput() {
   </form>      this.document.client.elements.upass$now.removeAttribute("readOnly");
 ENDSERVERFORM      this.document.client.elements.uname.removeAttribute("readOnly");
     my $coursecatalog;      this.document.client.elements.udom.removeAttribute("readOnly");
     if (($showcoursecat eq '') || ($showcoursecat)) {      return;
         $coursecatalog = &coursecatalog_link($lt{'catalog'});  }
     }  
     my $newuserlink;  // ]]>
     if ($shownewuserlink) {  </script>
         $newuserlink = &newuser_link($lt{'newuser'});  
     }  ENDSCRIPT
     my $logintitle;  
     if ($loginheader eq 'text') {  # --------------------------------------------------- Print login screen header
         $logintitle = $lt{'log'};  
     } else {      my %add_entries = (
         $logintitle = '<img src="'.$login.'" alt="'.         bgcolor      => "$mainbg",
                       &mt('User Authentication').'" />';         text         => "$font",
     }         link         => "$link",
              vlink        => "$vlink",
      my $noscript_warning='<noscript>'         alink        => "$alink",
                         .&mt('Use of LON-CAPA requires Javascript to be enabled in your web browser.')                 onload       => 'javascript:enableInput();',);
                         .'</noscript>';  
       my $helpdeskscript;      my ($lonhost_in_use,$headextra);
       my $contactblock = &contactdisplay(\%lt,$servadm,$showadminmail,      my @hosts = &Apache::lonnet::current_machine_ids();
                                   $version,$authdomain,\$helpdeskscript);      my $lonhost_in_use = $lonhost;
                        if (@hosts > 1) {
     if ($fullgraph) {           foreach my $hostid (@hosts) {
     $r->print(<<ENDTOP);              if (&Apache::lonnet::host_domain($hostid) eq $defdom) {
   <!-- The LON-CAPA Header -->                  $lonhost_in_use = $hostid;
 <table border="0" align="left" width="100%" cellspacing="0" cellpadding="1">                  last;
 <tr>              }
 <td align="left" valign="top" bgcolor="$pgbg"> <img src="$img" border=0 alt="The Learning Online Network with CAPA" /> </td>          }
 </tr>      }
 </table>      my %defaultdomconf = &Apache::loncommon::get_domainconf($defdom);
       my $headextra = $defaultdomconf{$defdom.'.login.headtag_'.$lonhost_in_use};
  <div class="LC_loginpage_space">&nbsp;</div>      my $headextra_exempt = $defaultdomconf{$domain.'.login.headtag_exempt_'.$lonhost_in_use};
     <img src="$logo" alt="" />      if ($headextra) {
  <div class="LC_loginpage_loginContainer"><fieldset class="LC_loginpage_fieldset">          my $omitextra;
 <legend class="LC_loginpage_legend">$logintitle</legend>          if ($headextra_exempt ne '') {
 <table border="0" align="left" cellspacing="1" cellpadding="1" width="100%">              my @exempt = split(',',$headextra_exempt);
  <tr>              my $ip = $ENV{'REMOTE_ADDR'};
  <td width="50%" align="center" valign="top">$domainlogo</td>              if (grep(/^\Q$ip\E$/,@exempt)) {
  <td>                  $omitextra = 1;
 ENDTOP              }
           }
 $r->print('<form name="client" onsubmit="return(send())">');          unless ($omitextra) {
               my $confname = $defdom.'-domainconfig';
 $r->print(<<ENDTOPP)              if ($headextra =~ m{^\Q/res/$defdom/$confname/login/headtag/$lonhost_in_use/\E}) {
  <input type="hidden" name="lextkey" value="$lextkey">                  my $extra = &Apache::lonnet::getfile(&Apache::lonnet::filelocation("",$headextra));
       <input type="hidden" name="uextkey" value="$uextkey">                  unless ($extra eq '-1') {
       <b><label for="uname">$lt{'un'}</label>:</b><br />                      $js .= "\n".$extra."\n";
         <input type="text" name="uname" size="10" value="$authusername" /><br />                  }
         <b><label for="upass$now">$lt{'pw'}</label>:</b><br />              }
       <input type="password" name="upass$now" size="10" /><br />          }
       <b><label for="udom">$lt{'dom'}</label>:</b><br />      }
         <input type="text" name="udom" size="10" value="$authdomain" /><br />  
         <input type="submit" value="$lt{'log'}" />      $r->print(&Apache::loncommon::start_page('The LearningOnline Network with CAPA Login',$js,
         </form>         { 'redirect'       => [$expire,'/adm/roles'],
  </td>   'add_entries' => \%add_entries,
  </tr>   'only_body'   => 1,}));
 </table>    
 $noscript_warning  # ----------------------------------------------------------------------- Texts
 </fieldset></div>  
         my %lt=&Apache::lonlocal::texthash(
 <div class="LC_loginpage_loginInfo">            'un'       => 'Username',
         $loginhelp<br />            'pw'       => 'Password',
         $forgotpw<br /><br />            'dom'      => 'Domain',
         $newuserlink<br />            'perc'     => 'percent',
         $coursecatalog<br /><br />            'load'     => 'Server Load',
         <a href="/adm/about.html"><b>$lt{'about'}</b></a><br />            'userload' => 'User Load',
         $helpdeskscript            'catalog'  => 'Course/Community Catalog',
 </div>            'log'      => 'Log in',
 <div class="LC_loginpage_space">&nbsp;</div>            'help'     => 'Log-in Help',
 $announcements            'serv'     => 'Server',
 ENDTOPP            'servadm'  => 'Server Administration',
 }            'helpdesk' => 'Contact Helpdesk',
 if($announcements){$r->print('<div class="LC_loginpage_space">&nbsp;</div>');}            'forgotpw' => 'Forgot password?',
             'newuser'  => 'New User?',
          );
    if ($fullgraph) {  # -------------------------------------------------- Change password field name
         
  $r->print(<<ENDDOCUMENT);      my $forgotpw = &forgotpwdisplay(%lt);
          $forgotpw .= '<br />' if $forgotpw;
       my $loginhelp = &Apache::lonauth::loginhelpdisplay($authdomain);
      <table border=0 cellspacing=0 cellpadding=0>      if ($loginhelp) {
       <tr>          $loginhelp = '<a href="'.$loginhelp.'">'.$lt{'help'}.'</a><br />';
        <td bgcolor="$sidebg" align="left" valign="top">      }
         <small><b>&nbsp;&nbsp;&nbsp;$lt{'dom'}:&nbsp;</b></small>  
        </td>  # ---------------------------------------------------- Serve out DES JavaScript
        <td bgcolor="$sidebg" align="left" valign="top">      {
         <small><tt>&nbsp;$domain</tt></small>      my $jsh=Apache::File->new($include."/londes.js");
        </td>      $r->print(<$jsh>);
       </tr>      }
       <tr>  # ---------------------------------------------------------- Serve rest of page
        <td bgcolor="$sidebg" align="left" valign="top">  
         <small><b>&nbsp;&nbsp;&nbsp;$lt{'serv'}:&nbsp;</b></small>      $r->print(
        </td>      '<div class="LC_Box"'
        <td bgcolor="$sidebg" align="left" valign="top">     .' style="margin:0 auto; padding:10px; width:90%; height: auto; background-color:#FFFFFF;">'
         <small><tt>&nbsp;$lonhost ($role)</tt></small>  );
        </td>  
       </tr>      $r->print(<<ENDSERVERFORM);
       <tr>  <form name="server" action="/adm/authenticate" method="post" target="_top">
        <td bgcolor="$sidebg" align="left" valign="top">     <input type="hidden" name="logtoken" value="$logtoken" />
         <small><b>&nbsp;&nbsp;&nbsp;$lt{'load'}:&nbsp;</b></small>     <input type="hidden" name="serverid" value="$lonhost" />
        </td>     <input type="hidden" name="uname" value="" />
        <td bgcolor="$sidebg" align="left" valign="top">     <input type="hidden" name="upass0" value="" />
         <small><tt>&nbsp;$loadpercent $lt{'perc'}</tt></small>     <input type="hidden" name="upass1" value="" />
        </td>     <input type="hidden" name="upass2" value="" />
       </tr>     <input type="hidden" name="udom" value="" />
       <tr>     <input type="hidden" name="localpath" value="$env{'form.localpath'}" />
        <td bgcolor="$sidebg" align="left" valign="top">     <input type="hidden" name="localres" value="$env{'form.localres'}" />
         <small><b>&nbsp;&nbsp;&nbsp;$lt{'userload'}:&nbsp;</b></small>    </form>
        </td>  ENDSERVERFORM
        <td bgcolor="$sidebg" align="left" valign="top">      my $coursecatalog;
         <small><tt>&nbsp;$userloadpercent $lt{'perc'}</tt></small>      if (($showcoursecat eq '') || ($showcoursecat)) {
        </td>          $coursecatalog = &coursecatalog_link($lt{'catalog'}).'<br />';
       </tr>      }
      </table>      my $newuserlink;
            if ($shownewuserlink) {
     $contactblock          $newuserlink = &newuser_link($lt{'newuser'}).'<br />';
       }
  </div>      my $logintitle =
           '<h2 class="LC_hcell"'
 <script type="text/javascript">         .' style="background:'.$loginbox_header_bgcol.';'
 // the if prevents the script error if the browser can not handle this         .' color:'.$loginbox_header_textcol.'">'
 if ( document.client.uname ) { document.client.uname.focus(); }         .$lt{'log'}
 </script>         .'</h2>';
 $helpdeskscript  
       my $noscript_warning='<noscript><span class="LC_warning"><b>'
 ENDDOCUMENT                          .&mt('Use of LON-CAPA requires Javascript to be enabled in your web browser.')
 }                          .'</b></span></noscript>';
     my %endargs = ( 'noredirectlink' => 1, );      my $helpdeskscript;
     $r->print(&Apache::loncommon::end_page(\%endargs));      my $contactblock = &contactdisplay(\%lt,$servadm,$showadminmail,
     return OK;                                         $authdomain,\$helpdeskscript,
 }                                         $showhelpdesk,\@possdoms);
   
 sub contactdisplay {      my $mobileargs;
     my ($lt,$servadm,$showadminmail,$version,$authdomain,$helpdeskscript) = @_;      if ($clientmobile) {
     my $contactblock;          $mobileargs = 'autocapitalize="off" autocorrect="off"';
     my $showhelpdesk = 0;      }
     my $requestmail = $Apache::lonnet::perlvar{'lonSupportEMail'};      my $loginform=(<<LFORM);
     if ($requestmail =~ m/^[^\@]+\@[^\@]+$/) {  <form name="client" action="" onsubmit="return(send())">
         $showhelpdesk = 1;    <input type="hidden" name="lextkey" value="$lextkey" />
     }    <input type="hidden" name="uextkey" value="$uextkey" />
     if ($servadm && $showadminmail) {    <b><label for="uname">$lt{'un'}</label>:</b><br />
         $contactblock .= '<b>&nbsp;&nbsp;&nbsp;'.$$lt{'servadm'}.':</b><br />'.    <input type="text" name="uname" id="uname" size="15" value="$authusername" readonly="readonly" $mobileargs /><br />
                          '<tt>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;'.$servadm.'</tt><br />&nbsp;<br />';    <b><label for="upass$now">$lt{'pw'}</label>:</b><br />
     }    <input type="password" name="upass$now" id="upass$now" size="15" readonly="readonly" /><br />
     if ($showhelpdesk) {    <b><label for="udom">$lt{'dom'}</label>:</b><br />
         $contactblock .= '<b>&nbsp;&nbsp;&nbsp;<a href="javascript:helpdesk()"><font size="+1">'.$lt->{'helpdesk'}.'</font></a></b><br />';    <input type="text" name="udom" id="udom" size="15" value="$authdomain" readonly="readonly" $mobileargs /><br />
         my $thisurl = &escape('/adm/login');    <input type="submit" value="$lt{'log'}" />
         $$helpdeskscript = <<"ENDSCRIPT";  </form>
 <script type="text/javascript">  LFORM
 function helpdesk() {  
     var codedom = document.client.udom.value;      if ($showbanner) {
     if (codedom == '') {          $r->print(<<HEADER);
         codedom = "$authdomain";  <!-- The LON-CAPA Header -->
     }  <div style="background:$pgbg;margin:0;width:100%;">
     var querystr = "origurl=$thisurl&codedom="+codedom;    <img src="$img" border="0" alt="The Learning Online Network with CAPA" />
     document.location.href = "/adm/helpdesk?"+querystr;  </div>
     return;  HEADER
 }      }
 </script>      $r->print(<<ENDTOP);
 ENDSCRIPT  <div style="float:left;margin-top:0;">
     }  <div class="LC_Box" style="background:$loginbox_bg;">
     $contactblock .= <<"ENDBLOCK";    $logintitle
      &nbsp;&nbsp;&nbsp;$version    $loginform
 ENDBLOCK    $noscript_warning
     return $contactblock;  </div>
 }   
   <div class="LC_Box" style="padding-top: 10px;">
 sub forgotpwdisplay {    $loginhelp
     my (%lt) = @_;    $forgotpw
     my $prompt_for_resetpw = 1;     $contactblock
     if ($prompt_for_resetpw) {    $newuserlink
         return '<a href="/adm/resetpw">'.$lt{'forgotpw'}.'</a>';    $coursecatalog
     }  </div>
     return;  </div>
 }  
   <div>
 sub loginhelpdisplay {  ENDTOP
     my (%lt) = @_;      if ($showmainlogo) {
     my $login_help = 1;          $r->print(' <img src="'.$logo.'" alt="" />'."\n");
     if ($login_help) {      }
         return '<a href="/adm/loginproblems.html">'.$lt{'help'}.'</a>';  $r->print(<<ENDTOP);
     }  $announcements
     return;  </div>
 }  <hr style="clear:both;" />
   ENDTOP
 sub coursecatalog_link {      my ($domainrow,$serverrow,$loadrow,$userloadrow,$versionrow);
     my ($linkname) = @_;      $domainrow = <<"END";
     return <<"END";        <tr>
       <a href="/adm/coursecatalog">$linkname</a>         <td  align="left" valign="top">
 END          <small><b>$lt{'dom'}:&nbsp;</b></small>
 }         </td>
          <td  align="left" valign="top">
 sub newuser_link {          <small><tt>&nbsp;$domain</tt></small>
     my ($linkname) = @_;         </td>
     return '&nbsp;&nbsp;&nbsp;<a href="/adm/createaccount"><b>'.$linkname.'</b></a><br />';        </tr>
 }  END
       $serverrow = <<"END";
 1;        <tr>
 __END__         <td  align="left" valign="top">
           <small><b>$lt{'serv'}:&nbsp;</b></small>
          </td>
          <td align="left" valign="top">
           <small><tt>&nbsp;$lonhost ($role)</tt></small>
          </td>
         </tr>
   END
       if ($loadlim) {
           $loadrow = <<"END";
         <tr>
          <td align="left" valign="top">
           <small><b>$lt{'load'}:&nbsp;</b></small>
          </td>
          <td align="left" valign="top">
           <small><tt>&nbsp;$loadpercent $lt{'perc'}</tt></small>
          </td>
         </tr>
   END
       }
       if ($uloadlim) {
           $userloadrow = <<"END";
         <tr>
          <td align="left" valign="top">
           <small><b>$lt{'userload'}:&nbsp;</b></small>
          </td>
          <td align="left" valign="top">
           <small><tt>&nbsp;$userloadpercent $lt{'perc'}</tt></small>
          </td>
         </tr>
   END
       }
       if (($version ne '') && ($version ne '<!-- VERSION -->')) {
           $versionrow = <<"END";
         <tr>
          <td colspan="2" align="left">
           <small>$version</small>
          </td>
         </tr>
   END
       }
   
       $r->print(<<ENDDOCUMENT);
       <div style="float: left;">
        <table border="0" cellspacing="0" cellpadding="0">
   $domainrow
   $serverrow
   $loadrow    
   $userloadrow
   $versionrow
        </table>
       </div>
       <div style="float: right;">
       $domainlogo
       </div>
       <br style="clear:both;" />
    </div>
   
   <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.1.107  
changed lines
  Added in v.1.163

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