1: # The LearningOnline Network
2: # Access Handler for User File Transfers
3: #
4: # $Id: lontokacc.pm,v 1.8 2003/08/01 15:46:10 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::lontokacc;
30:
31: use strict;
32: use Apache::Constants qw(:common :remotehost);
33: use Apache::lonnet();
34: use Apache::File();
35:
36:
37: sub handler {
38: my $r = shift;
39: my $reqhost = $r->get_remote_host(REMOTE_DOUBLE_REV);
40: if (!$reqhost && $r->get_remote_host(REMOTE_NOLOOKUP) eq $r->get_server_name()) {
41: $reqhost = $r->get_server_name();
42: }
43: unless ($reqhost) {
44: $r->log_reason("Spoof request from ". $reqhost);
45: return FORBIDDEN;
46: }
47: if ($reqhost eq 'localhost.localdomain') {
48: $r->register_cleanup(\&removefile);
49: return OK;
50: }
51: my $readline;
52: my $lontabdir=$r->dir_config('lonTabDir');
53: {
54: my $fh;
55: unless ($fh=Apache::File->new("$lontabdir/hosts.tab")) {
56: $r->log_reason("Could not find host tab file");
57: return FORBIDDEN;
58: }
59: while ($readline=<$fh>) {
60: my ($id,$domain,$role,$name,$ip)=split(/:/,$readline);
61: if ($name =~ /$reqhost/i) {
62: $r->register_cleanup(\&removefile);
63: return OK;
64: }
65: }
66:
67: }
68: $r->log_reason("Invalid request for user file transfer from $reqhost",
69: $r->filename);
70: return FORBIDDEN;
71: }
72:
73: sub removefile {
74: my $r=shift;
75: if ($r->status==200) {
76: unlink($r->filename);
77: &Apache::lonnet::logthis('Unlinking '.$r->filename);
78: } else {
79: &Apache::lonnet::logthis('Failed to transfer '.$r->filename);
80: }
81: }
82: 1;
83: __END__
84:
85:
86:
87:
88:
89:
90:
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