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Lock against logout.

    1: # The LearningOnline Network
    2: # Logout Handler
    3: #
    4: # $Id: lonlogout.pm,v 1.31 2008/05/13 15:06:34 www Exp $
    5: #
    6: # Copyright Michigan State University Board of Trustees
    7: #
    8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
    9: #
   10: # LON-CAPA is free software; you can redistribute it and/or modify
   11: # it under the terms of the GNU General Public License as published by
   12: # the Free Software Foundation; either version 2 of the License, or
   13: # (at your option) any later version.
   14: #
   15: # LON-CAPA is distributed in the hope that it will be useful,
   16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
   17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   18: # GNU General Public License for more details.
   19: #
   20: # You should have received a copy of the GNU General Public License
   21: # along with LON-CAPA; if not, write to the Free Software
   22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   23: #
   24: # /home/httpd/html/adm/gpl.txt
   25: #
   26: # http://www.lon-capa.org/
   27: #
   28: 
   29: package Apache::lonlogout;
   30: 
   31: use strict;
   32: use Apache::Constants qw(:common);
   33: use Apache::File;
   34: use Apache::lonnet;
   35: use Apache::lonmenu;
   36: use CGI::Cookie();
   37: use Apache::lonlocal;
   38: 
   39: sub handler {
   40:     my $r = shift;
   41: 
   42:     #Check for cookie
   43:     my $requrl=$r->uri;
   44:     my $handle = &Apache::lonnet::check_for_valid_session($r);
   45:     #check if cookie still valid
   46:     if ($handle eq '') {
   47: 	$r->log_reason("Cookie $handle not valid", $r->filename); 
   48: 	return FORBIDDEN;
   49:     }
   50: 
   51:     #we've got a valid user
   52:     #any locks in place?
   53:     my $locknum=&Apache::lonnet::get_locks();
   54:     if ($locknum) { return 409; }
   55:     #nope, go ahead
   56:     my @profile;
   57:     my $lonidsdir=$r->dir_config('lonIDsDir');
   58:     &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
   59:     unlink("$lonidsdir/$handle.id");
   60:     my %temp=('logout' => time);
   61:     &Apache::lonnet::put('email_status',\%temp);
   62:     &Apache::lonnet::log($env{'user.domain'},
   63: 			 $env{'user.name'},
   64: 			 $env{'user.home'},
   65: 			 "Logout $ENV{'REMOTE_ADDR'}");
   66: 
   67:     &Apache::loncommon::content_type($r,'text/html');
   68: 
   69:     #expire the cookie
   70:     my $c = new CGI::Cookie(-name    => 'lonID',
   71: 			    -value   => '',
   72: 			    -expires => '-10y',);
   73:     $r->header_out('Set-cookie' => $c);
   74: 
   75:     $r->send_http_header;
   76:     return OK if $r->header_only;
   77: # -------------------------------------------------------- Menu script and info
   78: 
   79:     my $windowinfo=&Apache::lonmenu::close();
   80:     $windowinfo.=&Apache::lonnavmaps::close();
   81: # ---------------------------------------------------------------- Get handover
   82:     &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['handover']);
   83:     my $switch='';
   84:     my $start_page='';
   85:     my $relogmessage='';
   86:     if ($env{'form.handover'}) {
   87: 	$switch='<meta HTTP-EQUIV="Refresh" CONTENT="0.5; url='.
   88: 	    $env{'form.handover'}.'">';
   89: 	$start_page=&Apache::loncommon::start_page('Switching Server ...',
   90: 						   $switch);
   91:     } else {
   92: 	$start_page=&Apache::loncommon::start_page('Logged Out',undef,
   93: 						   {'no_inline_link' => 1,});
   94: 	
   95: 	$relogmessage.='<h1>'.&mt('Goodbye').'</h1>';
   96: 
   97: 	if (!$env{'request.sso.norelogin'}) {
   98: 	    my $relogin_server;
   99: 	    if ($env{'request.sso.reloginserver'}) {
  100: 		$relogin_server = $env{'request.sso.reloginserver'};
  101: 	    }
  102: 	    my $login_url = $relogin_server.'/adm/'.
  103: 		($env{'request.sso.login'} ? 'roles': 'login');
  104: 
  105: 	    $relogmessage.=&mt('Please either [_1]close this window[_2] or [_3]log in again[_4].'
  106:                               ,'<a href="javascript:self.close();">','</a>'
  107:                               ,'<a href="'.$login_url.'?domain='.$env{'user.domain'}.'">','</a>');
  108:         }
  109: 	my $domain = $env{'user.domain'};
  110:         if ($env{'request.sso.login'}
  111: 	    && defined($r->dir_config("lonSSOUserLogoutMessageFile_$domain"))) {
  112: 	    open(my $fh,$r->dir_config("lonSSOUserLogoutMessageFile_$domain"));
  113: 	    $relogmessage.= join('',<$fh>);
  114: 	}
  115: 	if ($env{'request.sso.login'}
  116: 	    && defined($r->dir_config('lonSSOUserLogoutMessageFile'))) {
  117: 	    open(my $fh,$r->dir_config('lonSSOUserLogoutMessageFile'));
  118: 	    $relogmessage.= join('',<$fh>);
  119: 	}
  120: 
  121:     }
  122:     my $end_page=&Apache::loncommon::end_page();
  123: # --------------------------------------------------------------- Screen Output
  124:     $r->print(<<ENDDOCUMENT);
  125: $start_page
  126: $windowinfo
  127: $relogmessage
  128: $end_page
  129: ENDDOCUMENT
  130:     $r->register_cleanup(\&flush_course_logs);
  131:     return OK; 
  132: }
  133: 
  134: sub flush_course_logs {
  135:     &Apache::lonnet::flushcourselogs();
  136:     return OK;
  137: }
  138: 
  139: 1;
  140: __END__
  141: 
  142: 
  143: 
  144: 
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  146: 
  147: 
  148: