1: # The LearningOnline Network
2: # Switch Servers Handler
3: #
4: # $Id: switchserver.pm,v 1.12 2007/03/01 23:14:12 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__
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