Return to switchserver.pm CVS log

Up to [LON-CAPA] / loncom / auth

- starting work on moving to distributed DNS, eliminate usage of the lonnet hostanme global

    1: # The LearningOnline Network
    2: # Switch Servers Handler
    3: #
    4: # $Id: switchserver.pm,v 1.13 2007/03/02 23:17:48 albertel 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::switchserver;
   30: 
   31: use strict;
   32: use Apache::Constants qw(:common);
   33: use Apache::lonnet;
   34: use Apache::lonmenu;
   35: use CGI::Cookie();
   36: use Apache::lonlocal;
   37: 
   38: sub init_env {
   39:     my ($r) = @_;
   40:     
   41:     if (-e $env{'user.environment'}) {
   42: 	return  $env{'user.environment'};
   43:     }
   44:     my $requrl=$r->uri;
   45:     my %cookies=CGI::Cookie->parse($r->header_in('Cookie'));
   46:     my $lonid=$cookies{'lonID'};
   47:     my $cookie;
   48:     if (!$lonid) { return undef; }
   49: 
   50:     my $handle=&LONCAPA::clean_handle($lonid->value);
   51:     my $lonidsdir=$r->dir_config('lonIDsDir');
   52:     if ((!-e "$lonidsdir/$handle.id") || ($handle eq '')) {
   53: 	$r->log_reason("Cookie $handle not valid", $r->filename); 
   54: 	return undef;
   55:     }
   56: 
   57:     &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
   58:     
   59:     return $r->dir_config('lonIDsDir')."/$handle.id";
   60: }
   61: 
   62: sub handler {
   63:     my ($r) = @_;
   64:     
   65:     my $handle=&init_env($r);
   66:     if (!defined($handle)) { return FORBIDDEN; }
   67: 
   68:     &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
   69: 					    ['otherserver','role']);
   70: 
   71:     my $switch_to=&Apache::lonnet::hostname($env{'form.otherserver'});
   72:     if (!$env{'form.otherserver'}) {
   73: 	$env{'form.otherserver'}=&Apache::lonnet::spareserver(30000,undef,1);
   74: 	$switch_to=&Apache::lonnet::hostname($env{'form.otherserver'});
   75:     }
   76: 
   77:     if (!defined($switch_to)) { return FORBIDDEN; }
   78: 
   79:     if ($env{'form.role'} && 
   80: 	!exists($env{'user.role.'.$env{'form.role'}})) { return FORBIDDEN; }
   81: 
   82:     #remove session env, and log event
   83:     unlink($handle);
   84:     my %temp=('switchserver' => time.':'.$env{'form.otherserver'},
   85: 	      $env{'form.role'});
   86:     &Apache::lonnet::put('email_status',\%temp);
   87:     &Apache::lonnet::log($env{'user.domain'},$env{'user.name'},
   88: 			 $env{'user.home'},
   89: 			 "Switch Server to $env{'form.otherserver'} with role $env{'form.role'} $ENV{'REMOTE_ADDR'}");
   90: 
   91:     &Apache::loncommon::content_type($r,'text/html');
   92: 
   93:     #expire the cookie
   94:     my $c = new CGI::Cookie(-name    => 'lonID',
   95: 			    -value   => '',
   96: 			    -expires => '-10y',);
   97:     $r->header_out('Set-cookie' => $c);
   98:     $r->send_http_header;
   99:     return OK if $r->header_only;
  100: # -------------------------------------------------------- Menu script and info
  101: 	   
  102:     my $windowinfo=&Apache::lonmenu::close();
  103:     $windowinfo.=&Apache::lonnavmaps::close();
  104: # ---------------------------------------------------------------- Get handover
  105: 
  106:     my %info=('ip'       => $ENV{'REMOTE_ADDR'},
  107: 	      'domain'   => $env{'user.domain'},
  108: 	      'username' => $env{'user.name'},
  109: 	      'role'     => $env{'form.role'},
  110: 	      'server'   => $r->dir_config('lonHostID'));
  111:     if ($env{'request.sso.login'}) {
  112: 	$info{'sso.login'} = $env{'request.sso.login'};
  113:     }
  114:     if ($env{'request.sso.reloginserver'}) {
  115:         $info{'sso.reloginserver'} = $env{'request.sso.reloginserver'};
  116:     }
  117:     my $token = &Apache::lonnet::tmpput(\%info,$env{'form.otherserver'});
  118:     my $switch='<meta HTTP-EQUIV="Refresh" CONTENT="0.5; url=http://'.$switch_to.'/adm/login?domain='.$env{'user.domain'}.'&username='.$env{'user.name'}.'&token='.$token.'">';
  119:     my $start_page = &Apache::loncommon::start_page('Switching Server ...',
  120: 						    $switch,
  121: 						    {'no_inline_link' => 1,});
  122:     my $end_page   = &Apache::loncommon::end_page();
  123: # --------------------------------------------------------------- Screen Output
  124:     $r->print($start_page.$windowinfo.$end_page);
  125: 
  126:     &Apache::lonnet::flushcourselogs();
  127:     return OK;
  128: }
  129: 
  130: 1;
  131: __END__
  132: 
  133: 
  134: 
  135: 
  136: 
  137: 
  138: 
  139: