# The LearningOnline Network # Login Screen # # $Id: lonlogin.pm,v 1.3 2012/02/10 20:30:01 raeburn Exp $ # # Copyright Michigan State University Board of Trustees # # This file is part of the LearningOnline Network with CAPA (LON-CAPA). # # 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 # the Free Software Foundation; either version 2 of the License, or # (at your option) any later version. # # LON-CAPA is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with LON-CAPA; if not, write to the Free Software # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA # # /home/httpd/html/adm/gpl.txt # # http://www.lon-capa.org/ # package Apache::lonlogin; use strict; use Apache::Constants qw(:common); use Apache::File (); use Apache::lonnet; use Apache::loncommon(); use Apache::lonauth(); use Apache::lonlocal; use Apache::migrateuser(); use lib '/home/httpd/lib/perl/'; use LONCAPA; use HTML::Entities(); sub handler { my $r = shift; &Apache::loncommon::get_unprocessed_cgi (join('&',$ENV{'QUERY_STRING'},$env{'request.querystring'}, $ENV{'REDIRECT_QUERY_STRING'}), ['username','domain','firsturl','localpath','localres', 'token','role','symb']); if (!defined($env{'form.firsturl'})) { &Apache::lonacc::get_posted_cgi($r,['firsturl']); } $env{'form.firsturl'} =~ s/(`)/'/g; # -- check if they are a migrating user if (defined($env{'form.token'})) { return &Apache::migrateuser::handler($r); } &Apache::loncommon::no_cache($r); &Apache::lonlocal::get_language_handle($r); &Apache::loncommon::content_type($r,'text/html'); $r->send_http_header; return OK if $r->header_only; # --------------------------------------------------------- Are we re-routing? my $londocroot = $r->dir_config('lonDocRoot'); if (-e "$londocroot/lon-status/reroute.txt") { &Apache::lonauth::reroute($r); return OK; } # -------------------------------- Prevent users from attempting to login twice my $handle = &Apache::lonnet::check_for_valid_session($r); if ($handle ne '') { my $lonidsdir=$r->dir_config('lonIDsDir'); if ($handle=~/^publicuser\_/) { # For "public user" - remove it, we apparently really want to login unlink("$lonidsdir/$handle.id"); } else { # Indeed, a valid token is found &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle); my $start_page = &Apache::loncommon::start_page('Already logged in'); my $end_page = &Apache::loncommon::end_page(); my $dest = '/adm/roles'; if ($env{'form.role'}) { $dest .= '?selectrole=1&'.$env{'form.role'}.'=1'; } if ($env{'form.symb'}) { $dest .= ($dest =~ /\?/) ? '&' : '?'; $dest .= 'destinationurl='. &HTML::Entities::encode($env{'form.symb'},'"&<>'); } if ($env{'form.firsturl'} ne '') { $dest = $env{'form.firsturl'}; } $r->print( $start_page. '

'.&mt('You are already logged in!').'

'. '

'. &mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].', '','', '',''). '

'. $end_page ); return OK; } } # ---------------------------------------------------- No valid token, continue # ---------------------------- Not possible to really login to domain "public" if ($env{'form.domain'} eq 'public') { $env{'form.domain'}=''; $env{'form.username'}=''; } # ----------------------------------------------------------- Process Interface my $httpbrowser=$ENV{"HTTP_USER_AGENT"}; my $iconpath= &Apache::loncommon::lonhttpdurl($r->dir_config('lonIconsURL')); # ---------------------------------------------------------------- my $lonhost = $r->dir_config('lonHostID'); my $domain = &Apache::lonnet::default_login_domain(); if ($lonhost ne '') { my $redirect = &check_loginvia($domain,$lonhost); if ($redirect) { $r->print($redirect); return OK; } } if (($env{'form.domain'}) && (&Apache::lonnet::domain($env{'form.domain'},'description'))) { $domain=$env{'form.domain'}; } my $role = $r->dir_config('lonRole'); my $loadlim = $r->dir_config('lonLoadLim'); my $uloadlim= $r->dir_config('lonUserLoadLim'); my $servadm = $r->dir_config('lonAdmEMail'); my $tabdir = $r->dir_config('lonTabDir'); 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); # --------------------------------------------- Default values for login fields my $authusername=($env{'form.username'}?$env{'form.username'}:''); my $authdomain=($env{'form.domain'}?$env{'form.domain'}:$domain); # ---------------------------------------------------------- Determine own load my $loadavg; { my $loadfile=Apache::File->new('/proc/loadavg'); $loadavg=<$loadfile>; } $loadavg =~ s/\s.*//g; my ($loadpercent,$userloadpercent); if ($loadlim) { $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim); } if ($uloadlim) { $userloadpercent=&Apache::lonnet::userload(); } my $firsturl= ($env{'request.firsturl'}?$env{'request.firsturl'}:$env{'form.firsturl'}); # ----------------------------------------------------------- Get announcements my $announcements=&Apache::lonnet::getannounce(); # -------------------------------------------------------- Set login parameters my @hexstr=('0','1','2','3','4','5','6','7', '8','9','a','b','c','d','e','f'); my $lkey=''; for (0..7) { $lkey.=$hexstr[rand(15)]; } my $ukey=''; for (0..7) { $ukey.=$hexstr[rand(15)]; } my $lextkey=hex($lkey); if ($lextkey>2147483647) { $lextkey-=4294967296; } my $uextkey=hex($ukey); if ($uextkey>2147483647) { $uextkey-=4294967296; } # -------------------------------------------------------- Store away log token my $tokenextras; if ($env{'form.role'}) { $tokenextras = '&role='.&escape($env{'form.role'}); } if ($env{'form.symb'}) { if (!$tokenextras) { $tokenextras = '&'; } $tokenextras .= '&symb='.&escape($env{'form.symb'}); } my $logtoken=Apache::lonnet::reply( 'tmpput:'.$ukey.$lkey.'&'.$firsturl.$tokenextras, $lonhost); # -- If we cannot talk to ourselves, or hostID does not map to a hostname # we are in serious trouble if (($logtoken eq 'con_lost') || ($logtoken eq 'no_such_host')) { if ($logtoken eq 'no_such_host') { &Apache::lonnet::logthis('No valid logtoken for log-in page -- '. 'unable to determine hostname for hostID: '.$lonhost. '. Check entry in hosts.tab'); } my $spares=''; my $last; foreach my $hostid (sort { &Apache::lonnet::hostname($a) cmp &Apache::lonnet::hostname($b); } keys(%Apache::lonnet::spareid)) { next if ($hostid eq $lonhost); my $hostname = &Apache::lonnet::hostname($hostid); next if (($last eq $hostname) || ($hostname eq '')); $spares.='
'. $hostname.''. ' '.&mt('(preferred)').''.$/; $last=$hostname; } if ($spares) { $spares.= '
'; } my %all_hostnames = &Apache::lonnet::all_hostnames(); foreach my $hostid (sort { &Apache::lonnet::hostname($a) cmp &Apache::lonnet::hostname($b); } keys(%all_hostnames)) { next if ($hostid eq $lonhost || $Apache::lonnet::spareid{$hostid}); my $hostname = &Apache::lonnet::hostname($hostid); next if (($last eq $hostname) || ($hostname eq '')); $spares.='
'. $hostname.''; $last=$hostname; } $r->print( '' .'' .&mt('The LearningOnline Network with CAPA') .'' .'' .'

'.&mt('The LearningOnline Network with CAPA').'

' .'' .'

'.&mt("This Learn Physics server is temporarily not available for login.").'

' .'' .'' ); return OK; } # ----------------------------------------------- Apparently we are in business $servadm=~s/\,/\
/g; # ----------------------------------------------------------------------- Texts my $pagetitle = 'Learn Physics Login'; # Do not localize. my %lt=&Apache::lonlocal::texthash( 'needu' => 'You must provide a username', 'needp' => 'You must provide a password', 'un' => 'Username', 'pw' => 'Password', 'dom' => 'Domain', 'perc' => 'percent', 'load' => 'Server Load', 'userload' => 'User Load', 'catalog' => 'Course/Community Catalog', 'log' => 'Log-in', 'help' => 'Log-in Help', 'serv' => 'Server', 'servadm' => 'Server Administration', 'helpdesk' => 'Contact Helpdesk', 'forgotpw' => 'Forgot your password?', 'newuser' => 'New User?', 'learn' => 'Learn Physics includes an online mechanics course, to which you may receive admission after successfully completing a pre-course test.', 'click' => 'Click here to sign up', 'plea' => 'Please log-in', 'supp' => 'Support from NSF, NIH, Google', 'note' => 'Please Note:', 'jscr' => 'Javascript must be enabled in your web browser in order to use this web site.', ); # ----------------------------------------------------------- Front page design my $font=&Apache::loncommon::designparm('login.font',$domain); my $link=&Apache::loncommon::designparm('login.link',$domain); my $vlink=&Apache::loncommon::designparm('login.vlink',$domain); my $alink=&Apache::loncommon::designparm('login.alink',$domain); my $mainbg=&Apache::loncommon::designparm('login.mainbg',$domain); my $showadminmail=&Apache::loncommon::designparm('login.adminmail',$domain); my $helpdeskscript; my $contactblock = &contactdisplay(\%lt,$servadm,$showadminmail, $authdomain,\$helpdeskscript); # -------------------------------------------------- Change password field name my $now=time; # ---------------------------------------- Assemble Javascript to put in my $js = (< // $helpdeskscript ENDSCRIPT # --------------------------------------------------- Print login screen header my %add_entries = ( bgcolor => "$mainbg", text => "$font", link => "$link", vlink => "$vlink", alink => "$alink", onload => 'javascript:enableInput();',); my $css_url = "/css/$domain/login.css"; $js .= "\n".''."\n"; $r->print(&Apache::loncommon::start_page($pagetitle,$js, {'redirect' => [$expire,'/adm/roles'], 'add_entries' => \%add_entries, 'only_body' => 1,})); # ------------------------------------------------------------ Additional Texts $lt{'newto'} = &mt('New to the [_1]Learn Physics[_2] site?','',''); $lt{'runson'} = &mt('Learn Physics runs on [_1]LON-CAPA[_2] - an open source, freeware, distributed learning content management and assessment system.', '', ' LC'); $lt{'newhere'} = &mt('New to [_1]Learn Physics[_2]:','',''); $lt{'exist'} = &mt('Existing [_1]Learn Physics[_2] user','',''); $lt{'browser'} = &mt('Your browser must allow [_1]cookies[_2]', '',''); my ($contactrow,$domainrow,$serverrow,$loadrow,$userloadrow,$versionrow); $contactrow = <<"END"; $contactblock END $domainrow = <<"END"; $lt{'dom'}:   $domain END $serverrow = <<"END"; $lt{'serv'}:   $lonhost ($role) END if ($loadlim) { $loadrow = <<"END"; $lt{'load'}:   $loadpercent $lt{'perc'} END } if ($uloadlim) { $userloadrow = <<"END"; $lt{'userload'}:   $userloadpercent $lt{'perc'} END } if (($version ne '') && ($version ne '')) { $versionrow = <<"END"; $version END } # -------------------------------------------- Static cid for prerequisite test my $prereqcid = 'relate_3H121116c19344ff3relatel1'; # ---------------------------------------------------- Warning if no Javascript my $noscript_warning = ''; # ---------------------------------------------------- Serve out DES JavaScript { my $jsh=Apache::File->new($include."/londes.js"); $r->print(<$jsh>); } # ---------------------------------------------------------- Serve rest of page $r->print(<<"ENDLOGIN");

Relate @ MIT
 
$lt{'newto'}
$lt{'learn'}

$lt{'runson'}


 
 
 
 

$lt{'exist'}
$lt{'plea'}


:
:
 


$lt{'browser'}

$lt{'forgotpw'}

 
 
 

 
 
$contactrow $domainrow $serverrow $loadrow $userloadrow $versionrow
$lt{'supp'}
 

 

$noscript_warning
ENDLOGIN # -------------------------------------------------------- Standard page ending 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,$helpdeskscript) = @_; return unless(ref($lt) eq 'HASH'); my $contactblock; my $showhelpdesk = 0; my $requestmail = $Apache::lonnet::perlvar{'lonSupportEMail'}; if ($requestmail =~ m/^[^\@]+\@[^\@]+$/) { $showhelpdesk = 1; } if ($servadm && $showadminmail) { $contactblock .= $lt->{'servadm'}.':
'. ''.$servadm.'
'; } if ($showhelpdesk) { $contactblock .= ''.$lt->{'helpdesk'}.'
'; my $thisurl = &escape('/adm/login'); $$helpdeskscript = <<"ENDSCRIPT"; ENDSCRIPT } return $contactblock; } 1; __END__