1: # The LearningOnline Network
2: # Access Handler for File Transfers
3: #
4: # $Id: lonracc.pm,v 1.4 2002/01/17 19:25:31 harris41 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: # (lonacc: Cookie Based Access Handler
29: # 5/21/99,5/22,5/29,5/31,6/15 Gerd Kortemeyer)
30: # 6/16,6/18,7/3,
31: # 6/30/00 Gerd Kortemeyer
32:
33: package Apache::lonracc;
34:
35: use strict;
36: use Apache::Constants qw(:common :remotehost);
37: use Apache::File();
38:
39: sub handler {
40: my $r = shift;
41: my $reqhost;
42: unless ($reqhost=$r->get_remote_host(REMOTE_DOUBLE_REV)) {
43: $r->log_reason("Spoof request");
44: return FORBIDDEN;
45: }
46: my $readline;
47: my $lontabdir=$r->dir_config('lonTabDir');
48: {
49: my $fh;
50: unless ($fh=Apache::File->new("$lontabdir/hosts.tab")) {
51: $r->log_reason("Could not find host tab file");
52: return FORBIDDEN;
53: }
54: while ($readline=<$fh>) {
55: my ($id,$domain,$role,$name,$ip)=split(/:/,$readline);
56: if ($name =~ /$reqhost/i) {
57: my $filename=$r->filename;
58: if ((-e "$filename.$id") || ($filename=~/\.meta$/)) {
59: return OK;
60: } else {
61: $r->log_reason("$id not subscribed", $r->filename);
62: return FORBIDDEN;
63: }
64: }
65: }
66:
67: }
68: $r->log_reason("Invalid request for file transfer from $reqhost",
69: $r->filename);
70: return FORBIDDEN;
71: }
72:
73: 1;
74: __END__
75:
76: =head1 NAME
77:
78: Apache::lonracc - Access Handler for File Transfers
79:
80: =head1 SYNOPSIS
81:
82: Invoked by /etc/httpd/conf/loncapa.conf:
83:
84: <LocationMatch "^/raw.*">
85: PerlAccessHandler Apache::lonracc
86: </LocationMatch>
87:
88: =head1 INTRODUCTION
89:
90: This module enables authentication for file transfers and works
91: against the /res tree.
92:
93: Only lond invokes the /raw namespace through its subscribe function.
94:
95: This is part of the LearningOnline Network with CAPA project
96: described at http://www.lon-capa.org.
97:
98: =head1 HANDLER SUBROUTINE
99:
100: This routine is called by Apache and mod_perl.
101:
102: =over 4
103:
104: =item *
105:
106: Determine requesting host
107:
108: =item *
109:
110: See whether or not the requesting host is subscribed.
111:
112: =item *
113:
114: Respond with status of request and make log entry in case of unallowed
115: access.
116:
117: =back
118:
119: =cut
120:
121:
122:
123:
124:
125:
126:
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