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Diff for /loncom/auth/lonlogin.pm between versions 1.139 and 1.160

version 1.139, 2010/08/22 21:51:11 version 1.160, 2014/12/05 12:03:20
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'}),        $ENV{'REDIRECT_QUERY_STRING'}),
  ['interface','username','domain','firsturl','localpath','localres',   ['interface','username','domain','firsturl','localpath','localres',
   'token','role','symb']);    'token','role','symb','iptoken']);
     if (!defined($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 ne '') {  # -------------------------------- Prevent users from attempting to login twice
         my $lonidsdir=$r->dir_config('lonIDsDir');      my $handle = &Apache::lonnet::check_for_valid_session($r);
         if ($handle=~/^publicuser\_/) {      if ($handle ne '') {
 # For "public user" - remove it, we apparently really want to login          my $lonidsdir=$r->dir_config('lonIDsDir');
     unlink($r->dir_config('lonIDsDir')."/$handle.id");          if ($handle=~/^publicuser\_/) {
         } else {  # For "public user" - remove it, we apparently really want to login
 # Indeed, a valid token is found      unlink($r->dir_config('lonIDsDir')."/$handle.id");
             &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);          } else {
     my $start_page =   # Indeed, a valid token is found
         &Apache::loncommon::start_page('Already logged in');              &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
     my $end_page =       my $start_page =
         &Apache::loncommon::end_page();          &Apache::loncommon::start_page('Already logged in');
             my $dest = '/adm/roles';      my $end_page =
             if ($env{'form.firsturl'} ne '') {          &Apache::loncommon::end_page();
                 $dest = $env{'form.firsturl'};               my $dest = '/adm/roles';
             }              if ($env{'form.firsturl'} ne '') {
     $r->print(                  $dest = $env{'form.firsturl'};
                   $start_page              }
                  .'<h1>'.&mt('You are already logged in!').'</h1>'      $r->print(
                  .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].',                    $start_page
                   '<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>').'</p>'                   .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>'
                  .$end_page                   .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].',
                  );                    '<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>').'</p>'
             return OK;                   .$end_page
         }                   );
     }              return OK;
           }
 # ---------------------------------------------------- No valid token, continue      }
   
  # ---------------------------- Not possible to really login to domain "public"  # ---------------------------------------------------- No valid token, continue
     if ($env{'form.domain'} eq 'public') {  
  $env{'form.domain'}='';  # ---------------------------- Not possible to really login to domain "public"
  $env{'form.username'}='';      if ($env{'form.domain'} eq 'public') {
     }   $env{'form.domain'}='';
 # ----------------------------------------------------------- Process Interface   $env{'form.username'}='';
     $env{'form.interface'}=~s/\W//g;      }
   
     my $httpbrowser=$ENV{"HTTP_USER_AGENT"};  # ------ Is this page requested because /adm/migrateuser detected an IP change?
       my %sessiondata;
     my $iconpath=       if ($env{'form.iptoken'}) {
  &Apache::loncommon::lonhttpdurl($r->dir_config('lonIconsURL'));          %sessiondata = &Apache::lonnet::tmpget($env{'form.iptoken'});
           my $delete = &Apache::lonnet::tmpdel($env{'form.token'});
     my $lonhost = $r->dir_config('lonHostID');      }
     my $domain = &Apache::lonnet::default_login_domain();  # ----------------------------------------------------------- Process Interface
     if ($lonhost ne '') {      $env{'form.interface'}=~s/\W//g;
         my $redirect = &check_loginvia($domain,$lonhost);  
         if ($redirect) {      (undef,undef,undef,undef,undef,undef,my $clientmobile) =
             $r->print($redirect);          &Apache::loncommon::decode_user_agent();
             return OK;  
         }       my $iconpath=
     }   &Apache::loncommon::lonhttpdurl($r->dir_config('lonIconsURL'));
   
     if (($env{'form.domain'}) &&       my $lonhost = $r->dir_config('lonHostID');
  (&Apache::lonnet::domain($env{'form.domain'},'description'))) {      my $domain = &Apache::lonnet::default_login_domain();
  $domain=$env{'form.domain'};      if ($lonhost ne '') {
     }          unless ($sessiondata{'sessionserver'}) {
     my $role    = $r->dir_config('lonRole');              my $redirect = &check_loginvia($domain,$lonhost);
     my $loadlim = $r->dir_config('lonLoadLim');              if ($redirect) {
     my $servadm = $r->dir_config('lonAdmEMail');                  $r->print($redirect);
     my $tabdir  = $r->dir_config('lonTabDir');                  return OK;
     my $include = $r->dir_config('lonIncludes');              }
     my $expire  = $r->dir_config('lonExpire');          }
     my $version = $r->dir_config('lonVersion');      }
     my $host_name = &Apache::lonnet::hostname($lonhost);  
       if (($sessiondata{'domain'}) &&
 # --------------------------------------------- Default values for login fields          (&Apache::lonnet::domain($env{'form.domain'},'description'))) {
           $domain=$sessiondata{'domain'};
     my $authusername=($env{'form.username'}?$env{'form.username'}:'');      } elsif (($env{'form.domain'}) &&
     my $authdomain=($env{'form.domain'}?$env{'form.domain'}:$domain);   (&Apache::lonnet::domain($env{'form.domain'},'description'))) {
    $domain=$env{'form.domain'};
 # ---------------------------------------------------------- Determine own load      }
     my $loadavg;  
     {      my $role    = $r->dir_config('lonRole');
  my $loadfile=Apache::File->new('/proc/loadavg');      my $loadlim = $r->dir_config('lonLoadLim');
  $loadavg=<$loadfile>;      my $uloadlim= $r->dir_config('lonUserLoadLim');
     }      my $servadm = $r->dir_config('lonAdmEMail');
     $loadavg =~ s/\s.*//g;      my $tabdir  = $r->dir_config('lonTabDir');
     my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);      my $include = $r->dir_config('lonIncludes');
     my $userloadpercent=&Apache::lonnet::userload();      my $expire  = $r->dir_config('lonExpire');
       my $version = $r->dir_config('lonVersion');
 # ------------------------------------------------------- Do the load balancing      my $host_name = &Apache::lonnet::hostname($lonhost);
     my $otherserver= &Apache::lonnet::absolute_url($host_name);  
     my $firsturl=  # --------------------------------------------- Default values for login fields
     ($env{'request.firsturl'}?$env{'request.firsturl'}:$env{'form.firsturl'});     
 # ---------------------------------------------------------- Are we overloaded?      my ($authusername,$authdomain);
     if ((($userloadpercent>100.0)||($loadpercent>100.0))) {      if ($sessiondata{'username'}) {
         my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent);          $authusername=$sessiondata{'username'};
  if ($unloaded) { $otherserver=$unloaded; }      } else {
     }          $env{'form.username'} = &Apache::loncommon::cleanup_html($env{'form.username'});
           $authusername=($env{'form.username'}?$env{'form.username'}:'');
 # ----------------------------------------------------------- Get announcements      }
     my $announcements=&Apache::lonnet::getannounce();      if ($sessiondata{'domain'}) {
 # -------------------------------------------------------- Set login parameters          $authdomain=$sessiondata{'domain'};
       } else {
     my @hexstr=('0','1','2','3','4','5','6','7',          $env{'form.domain'} = &Apache::loncommon::cleanup_html($env{'form.domain'});
                 '8','9','a','b','c','d','e','f');          $authdomain=($env{'form.domain'}?$env{'form.domain'}:$domain);
     my $lkey='';      }
     for (0..7) {  
         $lkey.=$hexstr[rand(15)];  # ---------------------------------------------------------- Determine own load
     }      my $loadavg;
       {
     my $ukey='';   my $loadfile=Apache::File->new('/proc/loadavg');
     for (0..7) {   $loadavg=<$loadfile>;
         $ukey.=$hexstr[rand(15)];      }
     }      $loadavg =~ s/\s.*//g;
   
     my $lextkey=hex($lkey);      my ($loadpercent,$userloadpercent);
     if ($lextkey>2147483647) { $lextkey-=4294967296; }      if ($loadlim) {
           $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);
     my $uextkey=hex($ukey);      }
     if ($uextkey>2147483647) { $uextkey-=4294967296; }      if ($uloadlim) {
           $userloadpercent=&Apache::lonnet::userload();
 # -------------------------------------------------------- Store away log token      }
     my $tokenextras;  
     if ($env{'form.role'}) {      my $firsturl=
         $tokenextras = '&role='.&escape($env{'form.role'});      ($env{'request.firsturl'}?$env{'request.firsturl'}:$env{'form.firsturl'});
     }  
     if ($env{'form.symb'}) {  # ----------------------------------------------------------- Get announcements
         if (!$tokenextras) {      my $announcements=&Apache::lonnet::getannounce();
             $tokenextras = '&';  # -------------------------------------------------------- Set login parameters
         }  
         $tokenextras .= '&symb='.&escape($env{'form.symb'});      my @hexstr=('0','1','2','3','4','5','6','7',
     }                  '8','9','a','b','c','d','e','f');
     my $logtoken=Apache::lonnet::reply(      my $lkey='';
        'tmpput:'.$ukey.$lkey.'&'.$firsturl.$tokenextras,      for (0..7) {
        $lonhost);          $lkey.=$hexstr[rand(15)];
       }
 # ------------------- If we cannot talk to ourselves, we are in serious trouble  
       my $ukey='';
     if ($logtoken eq 'con_lost') {      for (0..7) {
         my $spares='';          $ukey.=$hexstr[rand(15)];
  my $last;      }
         foreach my $hostid (sort  
     {      my $lextkey=hex($lkey);
  &Apache::lonnet::hostname($a) cmp      if ($lextkey>2147483647) { $lextkey-=4294967296; }
     &Apache::lonnet::hostname($b);  
     }      my $uextkey=hex($ukey);
     keys(%Apache::lonnet::spareid)) {      if ($uextkey>2147483647) { $uextkey-=4294967296; }
             next if ($hostid eq $lonhost);  
     my $hostname = &Apache::lonnet::hostname($hostid);  # -------------------------------------------------------- Store away log token
     next if ($last eq $hostname);      my $tokenextras;
             $spares.='<br /><font size="+1"><a href="http://'.      if ($env{'form.role'}) {
                 $hostname.          $tokenextras = '&role='.&escape($env{'form.role'});
                 '/adm/login?domain='.$authdomain.'">'.      }
                 $hostname.'</a>'.      if ($env{'form.symb'}) {
                 ' '.&mt('(preferred)').'</font>'.$/;          if (!$tokenextras) {
     $last=$hostname;              $tokenextras = '&';
         }          }
 $spares.= '<br />';          $tokenextras .= '&symb='.&escape($env{'form.symb'});
 my %all_hostnames = &Apache::lonnet::all_hostnames();      }
 foreach my $hostid (sort      my $logtoken=Apache::lonnet::reply(
     {         'tmpput:'.$ukey.$lkey.'&'.$firsturl.$tokenextras,
  &Apache::lonnet::hostname($a) cmp         $lonhost);
     &Apache::lonnet::hostname($b);  
     }  # -- If we cannot talk to ourselves, or hostID does not map to a hostname
     keys(%all_hostnames)) {  #    we are in serious trouble
     next if ($hostid eq $lonhost || $Apache::lonnet::spareid{$hostid});  
     my $hostname = &Apache::lonnet::hostname($hostid);      if (($logtoken eq 'con_lost') || ($logtoken eq 'no_such_host')) {
     next if ($last eq $hostname);          if ($logtoken eq 'no_such_host') {
     $spares.='<br /><a href="http://'.              &Apache::lonnet::logthis('No valid logtoken for log-in page -- unable to determine hostname for hostID: '.$lonhost.'. Check entry in hosts.tab');
  $hostname.          }
  '/adm/login?domain='.$authdomain.'">'.          my $spares='';
  $hostname.'</a>';   my $last;
     $last=$hostname;          foreach my $hostid (sort
 }      {
 $r->print(   &Apache::lonnet::hostname($a) cmp
    '<html>'      &Apache::lonnet::hostname($b);
   .'<head><title>'      }
   .&mt('The LearningOnline Network with CAPA')      keys(%Apache::lonnet::spareid)) {
   .'</title></head>'              next if ($hostid eq $lonhost);
   .'<body bgcolor="#FFFFFF">'      my $hostname = &Apache::lonnet::hostname($hostid);
   .'<h1>'.&mt('The LearningOnline Network with CAPA').'</h1>'      next if (($last eq $hostname) || ($hostname eq ''));
   .'<img src="/adm/lonKaputt/lonlogo_broken.gif" align="right" />'              $spares.='<br /><font size="+1"><a href="http://'.
   .'<h3>'.&mt('This LON-CAPA server is temporarily not available for login.').'</h3>'                  $hostname.
   .'<p>'.&mt('Please attempt to login to one of the following servers:').'</p>'                  '/adm/login?domain='.$authdomain.'">'.
   .$spares                  $hostname.'</a>'.
   .'</body>'                  ' '.&mt('(preferred)').'</font>'.$/;
   .'</html>'      $last=$hostname;
 );          }
 return OK;          if ($spares) {
 }              $spares.= '<br />';
           }
 # ----------------------------------------------- Apparently we are in business          my %all_hostnames = &Apache::lonnet::all_hostnames();
 $servadm=~s/\,/\<br \/\>/g;          foreach my $hostid (sort
       {
 # ----------------------------------------------------------- Front page design   &Apache::lonnet::hostname($a) cmp
 my $pgbg=&Apache::loncommon::designparm('login.pgbg',$domain);      &Apache::lonnet::hostname($b);
 my $font=&Apache::loncommon::designparm('login.font',$domain);      }
 my $link=&Apache::loncommon::designparm('login.link',$domain);      keys(%all_hostnames)) {
 my $vlink=&Apache::loncommon::designparm('login.vlink',$domain);              next if ($hostid eq $lonhost || $Apache::lonnet::spareid{$hostid});
 my $alink=&Apache::loncommon::designparm('login.alink',$domain);              my $hostname = &Apache::lonnet::hostname($hostid);
 my $mainbg=&Apache::loncommon::designparm('login.mainbg',$domain);              next if (($last eq $hostname) || ($hostname eq ''));
 my $loginbox_bg=&Apache::loncommon::designparm('login.sidebg',$domain);              $spares.='<br /><a href="http://'.
 my $loginbox_header_bgcol=&Apache::loncommon::designparm('login.bgcol',$domain);               $hostname.
 my $loginbox_header_textcol=&Apache::loncommon::designparm('login.textcol',$domain);               '/adm/login?domain='.$authdomain.'">'.
 my $logo=&Apache::loncommon::designparm('login.logo',$domain);               $hostname.'</a>';
 my $img=&Apache::loncommon::designparm('login.img',$domain);              $last=$hostname;
 my $domainlogo='<div>'.&Apache::loncommon::domainlogo($domain).'</div>';           }
 my $showbanner = 1;           $r->print(
 my $showmainlogo = 1;     '<html>'
 if (defined(&Apache::loncommon::designparm('login.showlogo_img',$domain))) {    .'<head><title>'
     $showbanner = &Apache::loncommon::designparm('login.showlogo_img',$domain);    .&mt('The LearningOnline Network with CAPA')
 }    .'</title></head>'
 if (defined(&Apache::loncommon::designparm('login.showlogo_logo',$domain))) {    .'<body bgcolor="#FFFFFF">'
     $showmainlogo = &Apache::loncommon::designparm('login.showlogo_logo',$domain);    .'<h1>'.&mt('The LearningOnline Network with CAPA').'</h1>'
 }    .'<img src="/adm/lonKaputt/lonlogo_broken.gif" align="right" />'
 my $showadminmail=&Apache::loncommon::designparm('login.adminmail',$domain);    .'<h3>'.&mt('This LON-CAPA server is temporarily not available for login.').'</h3>');
 my $showcoursecat =          if ($spares) {
 &Apache::loncommon::designparm('login.coursecatalog',$domain);              $r->print('<p>'.&mt('Please attempt to login to one of the following servers:')
 my $shownewuserlink =                        .'</p>'
 &Apache::loncommon::designparm('login.newuser',$domain);                       .$spares);
 my $now=time;          }
 my $js = (<<ENDSCRIPT);          $r->print('</body>'
                    .'</html>'
 <script type="text/javascript" language="JavaScript">          );
 // <![CDATA[          return OK;
 function send()      }
 {  
 this.document.server.elements.uname.value  # ----------------------------------------------- Apparently we are in business
 =this.document.client.elements.uname.value;      $servadm=~s/\,/\<br \/\>/g;
   
 this.document.server.elements.udom.value  # ----------------------------------------------------------- Front page design
 =this.document.client.elements.udom.value;      my $pgbg=&Apache::loncommon::designparm('login.pgbg',$domain);
       my $font=&Apache::loncommon::designparm('login.font',$domain);
 uextkey=this.document.client.elements.uextkey.value;      my $link=&Apache::loncommon::designparm('login.link',$domain);
 lextkey=this.document.client.elements.lextkey.value;      my $vlink=&Apache::loncommon::designparm('login.vlink',$domain);
 initkeys();      my $alink=&Apache::loncommon::designparm('login.alink',$domain);
       my $mainbg=&Apache::loncommon::designparm('login.mainbg',$domain);
 this.document.server.elements.upass0.value      my $loginbox_bg=&Apache::loncommon::designparm('login.sidebg',$domain);
     =crypted(this.document.client.elements.upass$now.value.substr(0,15));      my $loginbox_header_bgcol=&Apache::loncommon::designparm('login.bgcol',$domain);
 this.document.server.elements.upass1.value      my $loginbox_header_textcol=&Apache::loncommon::designparm('login.textcol',$domain);
     =crypted(this.document.client.elements.upass$now.value.substr(15,15));      my $logo=&Apache::loncommon::designparm('login.logo',$domain);
 this.document.server.elements.upass2.value      my $img=&Apache::loncommon::designparm('login.img',$domain);
     =crypted(this.document.client.elements.upass$now.value.substr(30,15));      my $domainlogo=&Apache::loncommon::domainlogo($domain);
       my $showbanner = 1;
 this.document.client.elements.uname.value='';      my $showmainlogo = 1;
 this.document.client.elements.upass$now.value='';      if (defined(&Apache::loncommon::designparm('login.showlogo_img',$domain))) {
           $showbanner = &Apache::loncommon::designparm('login.showlogo_img',$domain);
 this.document.server.submit();      }
 return false;      if (defined(&Apache::loncommon::designparm('login.showlogo_logo',$domain))) {
 }          $showmainlogo = &Apache::loncommon::designparm('login.showlogo_logo',$domain);
       }
 function enableInput() {      my $showadminmail;
     this.document.client.elements.upass$now.removeAttribute("readonly");      my @possdoms = &Apache::lonnet::current_machine_domains();
     this.document.client.elements.uname.removeAttribute("readonly");      if (grep(/^\Q$domain\E$/,@possdoms)) {
     this.document.client.elements.udom.removeAttribute("readonly");          $showadminmail=&Apache::loncommon::designparm('login.adminmail',$domain);
     return;      }
 }      my $showcoursecat =
           &Apache::loncommon::designparm('login.coursecatalog',$domain);
 // ]]>      my $shownewuserlink =
 </script>          &Apache::loncommon::designparm('login.newuser',$domain);
       my $showhelpdesk =
 ENDSCRIPT          &Apache::loncommon::designparm('login.helpdesk',$domain);
       my $now=time;
 # --------------------------------------------------- Print login screen header      my $js = (<<ENDSCRIPT);
   
 my %add_entries = (  <script type="text/javascript" language="JavaScript">
        bgcolor      => "$mainbg",  // <![CDATA[
        text         => "$font",  function send()
        link         => "$link",  {
        vlink        => "$vlink",  this.document.server.elements.uname.value
        alink        => "$alink",  =this.document.client.elements.uname.value;
                onload       => 'javascript:enableInput();',);  
   this.document.server.elements.udom.value
 $r->print(&Apache::loncommon::start_page('The LearningOnline Network with CAPA Login',$js,  =this.document.client.elements.udom.value;
        { 'redirect'       => [$expire,'/adm/roles'],   
  'add_entries' => \%add_entries,  uextkey=this.document.client.elements.uextkey.value;
  'only_body'   => 1,}));  lextkey=this.document.client.elements.lextkey.value;
   initkeys();
 # ----------------------------------------------------------------------- Texts  
   this.document.server.elements.upass0.value
 my %lt=&Apache::lonlocal::texthash(      =this.document.client.elements.upass$now.value.substr(0,15);
           'un'       => 'Username',  this.document.server.elements.upass1.value
           'pw'       => 'Password',      =this.document.client.elements.upass$now.value.substr(15,15);
           'dom'      => 'Domain',  this.document.server.elements.upass2.value
           'perc'     => 'percent',      =this.document.client.elements.upass$now.value.substr(30,15);
           'load'     => 'Server Load',  
           'userload' => 'User Load',  if(this.document.server.action.substr(0,5) === 'http:'){
           'catalog'  => 'Course/Community Catalog',      for (var idx in [1,2,3]){
           'log'      => 'Log in',          this.document.server.elements['upass' + idx].value =
           'help'     => 'Log-in Help',              crypted(this.document.server.elements['upass' + idx].value);
           'serv'     => 'Server',      }
           'servadm'  => 'Server Administration',  }
           'helpdesk' => 'Contact Helpdesk',  
           'forgotpw' => 'Forgot password?',  this.document.client.elements.uname.value='';
           'newuser'  => 'New User?',  this.document.client.elements.upass$now.value='';
        );  
 # -------------------------------------------------- Change password field name  this.document.server.submit();
   return false;
 my $forgotpw = &forgotpwdisplay(%lt);  }
 $forgotpw .= '<br />' if $forgotpw;  
 my $loginhelp = &loginhelpdisplay($authdomain,%lt);  function enableInput() {
 $loginhelp .= '<br />' if $loginhelp;      this.document.client.elements.upass$now.removeAttribute("readOnly");
       this.document.client.elements.uname.removeAttribute("readOnly");
 # ---------------------------------------------------- Serve out DES JavaScript      this.document.client.elements.udom.removeAttribute("readOnly");
 {      return;
 my $jsh=Apache::File->new($include."/londes.js");  }
 $r->print(<$jsh>);  
 }  // ]]>
 # ---------------------------------------------------------- Serve rest of page  </script>
   
 $r->print(  ENDSCRIPT
     '<div class="LC_Box"'  
    .' style="margin:0 auto; padding:10px; width:90%; height: auto; background-color:#FFFFFF;">'  # --------------------------------------------------- Print login screen header
 );  
       my %add_entries = (
 #         bgcolor      => "$mainbg",
 #  If the loadbalancing yielded just http:// because perhaps there's no loadbalancing?         text         => "$font",
 #  then just us a relative link to authenticate:         link         => "$link",
 #         vlink        => "$vlink",
          alink        => "$alink",
 $r->print(<<ENDSERVERFORM);                 onload       => 'javascript:enableInput();',);
 <form name="server" action="$otherserver/adm/authenticate" method="post" target="_top">  
    <input type="hidden" name="logtoken" value="$logtoken" />      $r->print(&Apache::loncommon::start_page('The LearningOnline Network with CAPA Login',$js,
    <input type="hidden" name="serverid" value="$lonhost" />         { 'redirect'       => [$expire,'/adm/roles'],
    <input type="hidden" name="uname" value="" />   'add_entries' => \%add_entries,
    <input type="hidden" name="upass0" value="" />   'only_body'   => 1,}));
    <input type="hidden" name="upass1" value="" />  
    <input type="hidden" name="upass2" value="" />  # ----------------------------------------------------------------------- Texts
    <input type="hidden" name="udom" value="" />  
    <input type="hidden" name="localpath" value="$env{'form.localpath'}" />      my %lt=&Apache::lonlocal::texthash(
    <input type="hidden" name="localres" value="$env{'form.localres'}" />            'un'       => 'Username',
   </form>            'pw'       => 'Password',
 ENDSERVERFORM            'dom'      => 'Domain',
 my $coursecatalog;            'perc'     => 'percent',
 if (($showcoursecat eq '') || ($showcoursecat)) {            'load'     => 'Server Load',
     $coursecatalog = &coursecatalog_link($lt{'catalog'}).'<br />';            'userload' => 'User Load',
 }            'catalog'  => 'Course/Community Catalog',
 my $newuserlink;            'log'      => 'Log in',
 if ($shownewuserlink) {            'help'     => 'Log-in Help',
     $newuserlink = &newuser_link($lt{'newuser'}).'<br />';            'serv'     => 'Server',
 }            'servadm'  => 'Server Administration',
 my $logintitle =            'helpdesk' => 'Contact Helpdesk',
     '<h2 class="LC_hcell"'            'forgotpw' => 'Forgot password?',
    .' style="background:'.$loginbox_header_bgcol.';'            'newuser'  => 'New User?',
    .' color:'.$loginbox_header_textcol.'">'         );
    .$lt{'log'}  # -------------------------------------------------- Change password field name
    .'</h2>';  
       my $forgotpw = &forgotpwdisplay(%lt);
 my $noscript_warning='<noscript><span class="LC_warning"><b>'      $forgotpw .= '<br />' if $forgotpw;
                      .&mt('Use of LON-CAPA requires Javascript to be enabled in your web browser.')      my $loginhelp = &Apache::lonauth::loginhelpdisplay($authdomain);
                     .'</b></span></noscript>';      if ($loginhelp) {
 my $helpdeskscript;          $loginhelp = '<a href="'.$loginhelp.'">'.$lt{'help'}.'</a><br />';
 my $contactblock = &contactdisplay(\%lt,$servadm,$showadminmail,      }
                                    $authdomain,\$helpdeskscript);  
   # ---------------------------------------------------- Serve out DES JavaScript
 my $loginform=(<<LFORM);      {
 <form name="client" action="" onsubmit="return(send())">      my $jsh=Apache::File->new($include."/londes.js");
   <input type="hidden" name="lextkey" value="$lextkey" />      $r->print(<$jsh>);
   <input type="hidden" name="uextkey" value="$uextkey" />      }
   <b><label for="uname">$lt{'un'}</label>:</b><br />  # ---------------------------------------------------------- Serve rest of page
   <input type="text" name="uname" id="uname" size="15" value="$authusername" readonly="readonly" /><br />  
   <b><label for="upass$now">$lt{'pw'}</label>:</b><br />      $r->print(
   <input type="password" name="upass$now" id="upass$now" size="15" readonly="readonly" /><br />      '<div class="LC_Box"'
   <b><label for="udom">$lt{'dom'}</label>:</b><br />     .' style="margin:0 auto; padding:10px; width:90%; height: auto; background-color:#FFFFFF;">'
   <input type="text" name="udom" id="udom" size="15" value="$authdomain" readonly="readonly" /><br />  );
   <input type="submit" value="$lt{'log'}" />  
 </form>      $r->print(<<ENDSERVERFORM);
 LFORM  <form name="server" action="/adm/authenticate" method="post" target="_top">
      <input type="hidden" name="logtoken" value="$logtoken" />
     if ($showbanner) {     <input type="hidden" name="serverid" value="$lonhost" />
         $r->print(<<HEADER);     <input type="hidden" name="uname" value="" />
 <!-- The LON-CAPA Header -->     <input type="hidden" name="upass0" value="" />
 <div style="background:$pgbg;margin:0;width:100%;">     <input type="hidden" name="upass1" value="" />
   <img src="$img" border="0" alt="The Learning Online Network with CAPA" />     <input type="hidden" name="upass2" value="" />
 </div>     <input type="hidden" name="udom" value="" />
 HEADER     <input type="hidden" name="localpath" value="$env{'form.localpath'}" />
     }     <input type="hidden" name="localres" value="$env{'form.localres'}" />
     $r->print(<<ENDTOP);    </form>
 <div style="float:left;">  ENDSERVERFORM
 <div class="LC_Box" style="background:$loginbox_bg;">      my $coursecatalog;
   $logintitle      if (($showcoursecat eq '') || ($showcoursecat)) {
   $loginform          $coursecatalog = &coursecatalog_link($lt{'catalog'}).'<br />';
   $noscript_warning      }
 </div>      my $newuserlink;
         if ($shownewuserlink) {
 <div class="LC_Box" style="padding-top: 10px;">          $newuserlink = &newuser_link($lt{'newuser'}).'<br />';
   $loginhelp      }
   $forgotpw      my $logintitle =
   $contactblock          '<h2 class="LC_hcell"'
   $newuserlink         .' style="background:'.$loginbox_header_bgcol.';'
   $coursecatalog         .' color:'.$loginbox_header_textcol.'">'
 </div>         .$lt{'log'}
 </div>         .'</h2>';
   
 <div>      my $noscript_warning='<noscript><span class="LC_warning"><b>'
 ENDTOP                          .&mt('Use of LON-CAPA requires Javascript to be enabled in your web browser.')
     if ($showmainlogo) {                          .'</b></span></noscript>';
         $r->print(' <img src="'.$logo.'" alt="" />'."\n");      my $helpdeskscript;
     }      my $contactblock = &contactdisplay(\%lt,$servadm,$showadminmail,
 $r->print(<<ENDTOP);                                         $authdomain,\$helpdeskscript,
 $announcements                                         $showhelpdesk,\@possdoms);
 $domainlogo  
 </div>      my $mobileargs;
 <hr style="clear:both;" />      if ($clientmobile) {
 ENDTOP          $mobileargs = 'autocapitalize="off" autocorrect="off"';
       }
 $r->print(<<ENDDOCUMENT);      my $loginform=(<<LFORM);
      <table border="0" cellspacing="0" cellpadding="0">  <form name="client" action="" onsubmit="return(send())">
       <tr>    <input type="hidden" name="lextkey" value="$lextkey" />
        <td  align="left" valign="top">    <input type="hidden" name="uextkey" value="$uextkey" />
         <small><b>$lt{'dom'}:&nbsp;</b></small>    <b><label for="uname">$lt{'un'}</label>:</b><br />
        </td>    <input type="text" name="uname" id="uname" size="15" value="$authusername" readonly="readonly" $mobileargs /><br />
        <td  align="left" valign="top">    <b><label for="upass$now">$lt{'pw'}</label>:</b><br />
         <small><tt>&nbsp;$domain</tt></small>    <input type="password" name="upass$now" id="upass$now" size="15" readonly="readonly" /><br />
        </td>    <b><label for="udom">$lt{'dom'}</label>:</b><br />
       </tr>    <input type="text" name="udom" id="udom" size="15" value="$authdomain" readonly="readonly" $mobileargs /><br />
       <tr>    <input type="submit" value="$lt{'log'}" />
        <td  align="left" valign="top">  </form>
         <small><b>$lt{'serv'}:&nbsp;</b></small>  LFORM
        </td>  
        <td align="left" valign="top">      if ($showbanner) {
         <small><tt>&nbsp;$lonhost ($role)</tt></small>          $r->print(<<HEADER);
        </td>  <!-- The LON-CAPA Header -->
       </tr>  <div style="background:$pgbg;margin:0;width:100%;">
       <tr>    <img src="$img" border="0" alt="The Learning Online Network with CAPA" />
        <td align="left" valign="top">  </div>
         <small><b>$lt{'load'}:&nbsp;</b></small>  HEADER
        </td>      }
        <td align="left" valign="top">      $r->print(<<ENDTOP);
         <small><tt>&nbsp;$loadpercent $lt{'perc'}</tt></small>  <div style="float:left;margin-top:0;">
        </td>  <div class="LC_Box" style="background:$loginbox_bg;">
       </tr>    $logintitle
       <tr>    $loginform
        <td align="left" valign="top">    $noscript_warning
         <small><b>$lt{'userload'}:&nbsp;</b></small>  </div>
        </td>   
        <td align="left" valign="top">  <div class="LC_Box" style="padding-top: 10px;">
         <small><tt>&nbsp;$userloadpercent $lt{'perc'}</tt></small>    $loginhelp
        </td>    $forgotpw
       </tr>    $contactblock
       <tr>    $newuserlink
        <td colspan="2" align="left">    $coursecatalog
         <small>$version</small>  </div>
        </td>  </div>
       </tr>  
      </table>  <div>
  </div>  ENDTOP
       if ($showmainlogo) {
 <script type="text/javascript">          $r->print(' <img src="'.$logo.'" alt="" />'."\n");
 // <![CDATA[      }
 // the if prevents the script error if the browser can not handle this  $r->print(<<ENDTOP);
 if ( document.client.uname ) { document.client.uname.focus(); }  $announcements
 // ]]>  </div>
 </script>  <hr style="clear:both;" />
 $helpdeskscript  ENDTOP
       my ($domainrow,$serverrow,$loadrow,$userloadrow,$versionrow);
 ENDDOCUMENT      $domainrow = <<"END";
     my %endargs = ( 'noredirectlink' => 1, );        <tr>
     $r->print(&Apache::loncommon::end_page(\%endargs));         <td  align="left" valign="top">
     return OK;          <small><b>$lt{'dom'}:&nbsp;</b></small>
 }         </td>
          <td  align="left" valign="top">
 sub check_loginvia {          <small><tt>&nbsp;$domain</tt></small>
     my ($domain,$lonhost) = @_;         </td>
     if ($domain eq '' || $lonhost eq '') {        </tr>
         return;  END
     }      $serverrow = <<"END";
     my %domconfhash = &Apache::loncommon::get_domainconf($domain);        <tr>
     my $loginvia = $domconfhash{$domain.'.login.loginvia_'.$lonhost};         <td  align="left" valign="top">
     my $loginvia_exempt = $domconfhash{$domain.'.login.loginvia_exempt_'.$lonhost};          <small><b>$lt{'serv'}:&nbsp;</b></small>
     my $output;         </td>
     if ($loginvia ne '') {         <td align="left" valign="top">
         my $noredirect;          <small><tt>&nbsp;$lonhost ($role)</tt></small>
         my $ip = $ENV{'REMOTE_ADDR'};         </td>
         if ($ip eq '127.0.0.1') {        </tr>
             $noredirect = 1;  END
         } else {      if ($loadlim) {
             if ($loginvia_exempt ne '') {          $loadrow = <<"END";
                 my @exempt = split(',',$loginvia_exempt);        <tr>
                 if (grep(/^\Q$ip\E$/,@exempt)) {         <td align="left" valign="top">
                     $noredirect = 1;          <small><b>$lt{'load'}:&nbsp;</b></small>
                 }         </td>
             }         <td align="left" valign="top">
         }          <small><tt>&nbsp;$loadpercent $lt{'perc'}</tt></small>
         unless ($noredirect) {         </td>
             my ($newhost,$path);        </tr>
             if ($loginvia =~ /:/) {  END
                 ($newhost,$path) = split(':',$loginvia);      }
             } else {      if ($uloadlim) {
                 $newhost = $loginvia;          $userloadrow = <<"END";
             }        <tr>
             if ($newhost ne $lonhost) {         <td align="left" valign="top">
                 if (&Apache::lonnet::hostname($newhost) ne '') {          <small><b>$lt{'userload'}:&nbsp;</b></small>
                     $output = &redirect_page($newhost,$path);         </td>
                 }         <td align="left" valign="top">
             }          <small><tt>&nbsp;$userloadpercent $lt{'perc'}</tt></small>
         }         </td>
     }        </tr>
     return $output;  END
 }      }
       if (($version ne '') && ($version ne '<!-- VERSION -->')) {
 sub redirect_page {          $versionrow = <<"END";
     my ($desthost,$path) = @_;        <tr>
     my $protocol = $Apache::lonnet::protocol{$desthost};         <td colspan="2" align="left">
     $protocol = 'http' if ($protocol ne 'https');          <small>$version</small>
     unless ($path =~ m{^/}) {         </td>
         $path = '/'.$path;        </tr>
     }  END
     my $url = $protocol.'://'.&Apache::lonnet::hostname($desthost).$path;      }
     if ($env{'form.firsturl'} ne '') {  
         $url .='?firsturl='.$env{'form.firsturl'};      $r->print(<<ENDDOCUMENT);
     }      <div style="float: left;">
     my $start_page = &Apache::loncommon::start_page('Switching Server ...',undef,       <table border="0" cellspacing="0" cellpadding="0">
                                                     {'redirect' => [0,$url],});  $domainrow
     my $end_page   = &Apache::loncommon::end_page();  $serverrow
     return $start_page.$end_page;  $loadrow    
 }  $userloadrow
   $versionrow
 sub contactdisplay {       </table>
     my ($lt,$servadm,$showadminmail,$authdomain,$helpdeskscript) = @_;      </div>
     my $contactblock;      <div style="float: right;">
     my $showhelpdesk = 0;      $domainlogo
     my $requestmail = $Apache::lonnet::perlvar{'lonSupportEMail'};      </div>
     if ($requestmail =~ m/^[^\@]+\@[^\@]+$/) {      <br style="clear:both;" />
         $showhelpdesk = 1;   </div>
     }  
     if ($servadm && $showadminmail) {  <script type="text/javascript">
         $contactblock .= $$lt{'servadm'}.':<br />'.  // <![CDATA[
                          '<tt>'.$servadm.'</tt><br />';  // the if prevents the script error if the browser can not handle this
     }  if ( document.client.uname ) { document.client.uname.focus(); }
     if ($showhelpdesk) {  // ]]>
         $contactblock .= '<a href="javascript:helpdesk()">'.$lt->{'helpdesk'}.'</a><br />';  </script>
         my $thisurl = &escape('/adm/login');  $helpdeskscript
         $$helpdeskscript = <<"ENDSCRIPT";  
 <script type="text/javascript">  ENDDOCUMENT
 // <![CDATA[      my %endargs = ( 'noredirectlink' => 1, );
 function helpdesk() {      $r->print(&Apache::loncommon::end_page(\%endargs));
     var codedom = document.client.udom.value;      return OK;
     if (codedom == '') {  }
         codedom = "$authdomain";  
     }  sub check_loginvia {
     var querystr = "origurl=$thisurl&codedom="+codedom;      my ($domain,$lonhost) = @_;
     document.location.href = "/adm/helpdesk?"+querystr;      if ($domain eq '' || $lonhost eq '') {
     return;          return;
 }      }
 // ]]>      my %domconfhash = &Apache::loncommon::get_domainconf($domain);
 </script>      my $loginvia = $domconfhash{$domain.'.login.loginvia_'.$lonhost};
 ENDSCRIPT      my $loginvia_exempt = $domconfhash{$domain.'.login.loginvia_exempt_'.$lonhost};
     }      my $output;
     return $contactblock;      if ($loginvia ne '') {
 }          my $noredirect;
           my $ip = $ENV{'REMOTE_ADDR'};
 sub forgotpwdisplay {          if ($ip eq '127.0.0.1') {
     my (%lt) = @_;              $noredirect = 1;
     my $prompt_for_resetpw = 1;           } else {
     if ($prompt_for_resetpw) {              if ($loginvia_exempt ne '') {
         return '<a href="/adm/resetpw">'.$lt{'forgotpw'}.'</a>';                  my @exempt = split(',',$loginvia_exempt);
     }                  if (grep(/^\Q$ip\E$/,@exempt)) {
     return;                      $noredirect = 1;
 }                  }
               }
 sub loginhelpdisplay {          }
     my ($authdomain,%lt) = @_;          unless ($noredirect) {
     my $login_help = 1;              my ($newhost,$path);
     if ($login_help) {              if ($loginvia =~ /:/) {
         my $dom = $authdomain;                  ($newhost,$path) = split(':',$loginvia);
         if ($dom eq '') {              } else {
             $dom = &Apache::lonnet::default_login_domain();                  $newhost = $loginvia;
         }              }
         my %helpconfig = &Apache::lonnet::get_dom('configuration',['helpsettings'],$dom);              if ($newhost ne $lonhost) {
         my $loginhelp_url = $helpconfig{'helpsettings'}{'loginhelpurl'};                  if (&Apache::lonnet::hostname($newhost) ne '') {
         if ($loginhelp_url ne '') {                      $output = &redirect_page($newhost,$path);
             return '<a href="'.$loginhelp_url.'">'.$lt{'help'}.'</a>';                  }
         } else {              }
             return '<a href="/adm/loginproblems.html">'.$lt{'help'}.'</a>';          }
         }      }
     }      return $output;
     return;  }
 }  
   sub redirect_page {
 sub coursecatalog_link {      my ($desthost,$path) = @_;
     my ($linkname) = @_;      my $protocol = $Apache::lonnet::protocol{$desthost};
     return <<"END";      $protocol = 'http' if ($protocol ne 'https');
       <a href="/adm/coursecatalog">$linkname</a>      unless ($path =~ m{^/}) {
 END          $path = '/'.$path;
 }      }
       my $url = $protocol.'://'.&Apache::lonnet::hostname($desthost).$path;
 sub newuser_link {      if ($env{'form.firsturl'} ne '') {
     my ($linkname) = @_;          $url .='?firsturl='.$env{'form.firsturl'};
     return '<a href="/adm/createaccount">'.$linkname.'</a>';      }
 }      my $start_page = &Apache::loncommon::start_page('Switching Server ...',undef,
                                                       {'redirect' => [0,$url],});
 1;      my $end_page   = &Apache::loncommon::end_page();
 __END__      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.1.139  
changed lines
  Added in v.1.160

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