Annotation of loncom/auth/switchserver.pm, revision 1.26

1.1       albertel    1: # The LearningOnline Network
                      2: # Switch Servers Handler
                      3: #
1.26    ! raeburn     4: # $Id: switchserver.pm,v 1.25 2010/03/22 20:11:08 droeschl Exp $
1.1       albertel    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) = @_;
1.5       albertel   40:     
                     41:     if (-e $env{'user.environment'}) {
                     42: 	return  $env{'user.environment'};
                     43:     }
1.1       albertel   44:     my $requrl=$r->uri;
1.18      albertel   45:     my $handle= &Apache::lonnet::check_for_valid_session($r);
                     46:     if ($handle ne '') {
1.1       albertel   47: 	return undef;
                     48:     }
1.18      albertel   49:     my $lonidsdir=$r->dir_config('lonIDsDir');
1.1       albertel   50:     &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
                     51:     
1.5       albertel   52:     return $r->dir_config('lonIDsDir')."/$handle.id";
1.1       albertel   53: }
                     54: 
1.14      albertel   55: sub do_redirect {
                     56:     my ($r,$url,$only_body,$extra_text) = @_;
                     57:     $r->send_http_header;
                     58:     my $start_page = 
1.16      raeburn    59: 	&Apache::loncommon::start_page('Switching Server ...',undef,
                     60: 				       {'redirect'       => [0.5,$url],
1.14      albertel   61: 					'only_body'      => $only_body,});
                     62:     my $end_page   = &Apache::loncommon::end_page();
                     63:     $r->print($start_page.$extra_text.$end_page);
                     64:     return OK;
                     65: 
                     66: }
                     67: 
1.1       albertel   68: sub handler {
1.5       albertel   69:     my ($r) = @_;
1.1       albertel   70:     
                     71:     my $handle=&init_env($r);
                     72:     if (!defined($handle)) { return FORBIDDEN; }
                     73: 
                     74:     &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1.22      raeburn    75: 				['otherserver','role','origurl','symb']);
1.5       albertel   76: 
1.13      albertel   77:     my $switch_to=&Apache::lonnet::hostname($env{'form.otherserver'});
1.17      albertel   78:     if (! $env{'form.otherserver'}) {
                     79: 	$env{'form.otherserver'} =	
                     80: 	    &Apache::lonnet::find_existing_session($env{'user.domain'},
                     81: 						   $env{'user.name'});
                     82: 	if (! $env{'form.otherserver'}) {
                     83: 	    $env{'form.otherserver'} = 
                     84: 		&Apache::lonnet::spareserver(30000,undef,1);
                     85: 	}
1.26    ! raeburn    86:         
1.13      albertel   87: 	$switch_to=&Apache::lonnet::hostname($env{'form.otherserver'});
1.4       albertel   88:     }
1.5       albertel   89: 
1.1       albertel   90:     if (!defined($switch_to)) { return FORBIDDEN; }
1.4       albertel   91: 
1.14      albertel   92:     if ($env{'user.name'} eq 'public'
                     93: 	&& $env{'user.domain'} eq 'public') {
1.19      albertel   94: 	my $url = 'http://'.$switch_to.$r->uri;
1.14      albertel   95: 	return &do_redirect($r,$url,1)
                     96:     }
                     97: 
1.26    ! raeburn    98:     my $canhost = 1;
        !            99:     my @machinedoms = &Apache::lonnet::machine_domains($switch_to);
        !           100:     unless (grep(/^\Q$env{'user.domain'}\E/,@machinedoms)) {
        !           101:         my $machinedom = &Apache::lonnet::host_domain($env{'form.otherserver'});
        !           102:         my %defdomdefaults = &Apache::lonnet::get_domain_defaults($machinedom);
        !           103:         my %udomdefaults = &Apache::lonnet::get_domain_defaults($env{'user.domain'});
        !           104:         my $remoterev = &Apache::lonnet::get_server_loncaparev($env{'user.domain'},$env{'form.otherserver'});
        !           105:         $canhost = &Apache::lonnet::can_host_session($env{'user.domain'},$machinedom,
        !           106:                                                      $remoterev,$udomdefaults{'remotesessions'},
        !           107:                                                      $defdomdefaults{'hostedsessions'});
        !           108:     }
        !           109: 
        !           110:     unless ($canhost) { return FORBIDDEN; }
        !           111: 
1.4       albertel  112:     if ($env{'form.role'} && 
                    113: 	!exists($env{'user.role.'.$env{'form.role'}})) { return FORBIDDEN; }
1.1       albertel  114: 
                    115:     #remove session env, and log event
1.5       albertel  116:     unlink($handle);
1.1       albertel  117:     my %temp=('switchserver' => time.':'.$env{'form.otherserver'},
                    118: 	      $env{'form.role'});
                    119:     &Apache::lonnet::put('email_status',\%temp);
                    120:     &Apache::lonnet::log($env{'user.domain'},$env{'user.name'},
                    121: 			 $env{'user.home'},
                    122: 			 "Switch Server to $env{'form.otherserver'} with role $env{'form.role'} $ENV{'REMOTE_ADDR'}");
                    123: 
                    124:     &Apache::loncommon::content_type($r,'text/html');
1.12      albertel  125: 
                    126:     #expire the cookie
                    127:     my $c = new CGI::Cookie(-name    => 'lonID',
                    128: 			    -value   => '',
                    129: 			    -expires => '-10y',);
                    130:     $r->header_out('Set-cookie' => $c);
1.20      albertel  131: 
                    132:     if ($r->header_only) {
                    133: 	$r->send_http_header;
                    134: 	return OK;
                    135:     }
1.1       albertel  136: # -------------------------------------------------------- Menu script and info
                    137: 	   
                    138: # ---------------------------------------------------------------- Get handover
                    139: 
1.3       albertel  140:     my %info=('ip'       => $ENV{'REMOTE_ADDR'},
                    141: 	      'domain'   => $env{'user.domain'},
                    142: 	      'username' => $env{'user.name'},
                    143: 	      'role'     => $env{'form.role'},
                    144: 	      'server'   => $r->dir_config('lonHostID'));
1.22      raeburn   145:     if ($env{'form.origurl'}) {
                    146:         $info{'origurl'} = $env{'form.origurl'};
                    147:     }
                    148:     if ($env{'form.symb'}) {
                    149:         $info{'symb'} = $env{'form.symb'};
                    150:     }
1.8       albertel  151:     if ($env{'request.sso.login'}) {
                    152: 	$info{'sso.login'} = $env{'request.sso.login'};
                    153:     }
1.11      raeburn   154:     if ($env{'request.sso.reloginserver'}) {
                    155:         $info{'sso.reloginserver'} = $env{'request.sso.reloginserver'};
                    156:     }
1.3       albertel  157:     my $token = &Apache::lonnet::tmpput(\%info,$env{'form.otherserver'});
1.14      albertel  158:     my $url ='http://'.$switch_to.'/adm/login?'.
                    159: 	'domain='.$env{'user.domain'}.
1.21      albertel  160: 	'&username='.$env{'user.name'}.
                    161: 	'&token='.$token;
1.1       albertel  162: # --------------------------------------------------------------- Screen Output
                    163:     &Apache::lonnet::flushcourselogs();
1.24      droeschl  164:     return &do_redirect($r, $url, 0);
1.1       albertel  165: }
                    166: 
                    167: 1;
                    168: __END__
                    169: 
                    170: 
                    171: 
                    172: 
                    173: 
                    174: 
                    175: 
                    176: 

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