File:
[LON-CAPA] /
loncom /
auth /
loncacc.pm
Revision
1.41:
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Thu Apr 13 19:07:33 2006 UTC (18 years, 4 months ago) by
albertel
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MAIN
CVS tags:
version_2_2_X,
version_2_2_2,
version_2_2_1,
version_2_2_0,
version_2_1_99_3,
version_2_1_99_2,
version_2_1_99_1,
version_2_1_99_0,
HEAD
- moving get_posted_cgi from loncommon to lonacc
1: # The LearningOnline Network
2: # Cookie Based Access Handler for Construction Area
3: # (lonacc: 5/21/99,5/22,5/29,5/31 Gerd Kortemeyer)
4: #
5: # $Id: loncacc.pm,v 1.41 2006/04/13 19:07:33 albertel Exp $
6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
13: # the Free Software Foundation; either version 2 of the License, or
14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
27: # http://www.lon-capa.org/
28: #
29:
30: package Apache::loncacc;
31:
32: use strict;
33: use Apache::Constants qw(:common :http :methods REDIRECT);
34: use CGI::Cookie();
35: use Fcntl qw(:flock);
36: use Apache::lonlocal;
37: use Apache::lonnet;
38: use Apache::lonacc;
39:
40: sub constructaccess {
41: my ($url,$ownerdomain)=@_;
42: my ($ownername)=($url=~/\/(?:\~|priv\/|home\/)(\w+)\//);
43: unless (($ownername) && ($ownerdomain)) { return ''; }
44: # We do not allow editing of previous versions of files.
45: if ($url=~/\.(\d+)\.(\w+)$/) { return ''; }
46: my @possibledomains = &Apache::lonnet::current_machine_domains();
47: if ($ownername eq $env{'user.name'}) {
48: foreach my $domain (@possibledomains) {
49: if ($domain eq $env{'user.domain'}) {
50: return ($ownername,$domain);
51: }
52: }
53: }
54:
55: foreach my $domain (@possibledomains) {
56: if (exists($env{'user.priv.ca./'.$domain.'/'.$ownername.'./'}) ||
57: exists($env{'user.priv.aa./'.$domain.'/'.$ownername.'./'}) ) {
58: return ($ownername,$domain);
59: }
60: }
61: return '';
62: }
63:
64: sub handler {
65: my $r = shift;
66: my $requrl=$r->uri;
67: $env{'request.editurl'}=$requrl;
68: my %cookies=CGI::Cookie->parse($r->header_in('Cookie'));
69: my $lonid=$cookies{'lonID'};
70: my $cookie;
71: if ($lonid) {
72: my $handle=$lonid->value;
73: $handle=~s/\W//g;
74: my $lonidsdir=$r->dir_config('lonIDsDir');
75: if ((-e "$lonidsdir/$handle.id") && ($handle ne '')) {
76:
77: # ------------------------------------------------------ Initialize Environment
78:
79: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
80:
81: # --------------------------------------------------------- Initialize Language
82:
83: &Apache::lonlocal::get_language_handle($r);
84:
85: # -------------------------------------------------------------- Resource State
86:
87: $env{'request.state'} = "construct";
88: $env{'request.filename'} = $r->filename;
89:
90: unless (&constructaccess($requrl,$r->dir_config('lonDefDomain'))) {
91: $r->log_reason("Unauthorized $requrl", $r->filename);
92: return HTTP_NOT_ACCEPTABLE;
93: }
94:
95: # -------------------------------------------------------- Load POST parameters
96:
97: &Apache::lonacc::get_posted_cgi($r);
98:
99: return OK;
100: } else {
101: $r->log_reason("Cookie $handle not valid", $r->filename)
102: };
103: }
104:
105: # ----------------------------------------------- Store where they wanted to go
106:
107: $env{'request.firsturl'}=$requrl;
108: return FORBIDDEN;
109: }
110:
111: 1;
112: __END__
113:
114: =head1 NAME
115:
116: Apache::lonacc - Cookie Based Access Handler for Construction Area
117:
118: =head1 SYNOPSIS
119:
120: Invoked (for various locations) by /etc/httpd/conf/loncapa_apache.conf:
121:
122: PerlAccessHandler Apache::loncacc
123:
124: =head1 INTRODUCTION
125:
126: This module enables cookie based authentication for construction area
127: and is used to control access for three (essentially equivalent) URIs.
128:
129: <LocationMatch "^/priv.*">
130: <LocationMatch "^/\~.*">
131: <LocationMatch "^/\~.*/$">
132:
133: Whenever the client sends the cookie back to the server,
134: if the cookie is missing or invalid, the user is re-challenged
135: for login information.
136:
137: This is part of the LearningOnline Network with CAPA project
138: described at http://www.lon-capa.org.
139:
140: =head1 HANDLER SUBROUTINE
141:
142: This routine is called by Apache and mod_perl.
143:
144: =over 4
145:
146: =item *
147:
148: load POST parameters
149:
150: =item *
151:
152: store where they wanted to go (first url entered)
153:
154: =back
155:
156: =head1 OTHERSUBROUTINES
157:
158: =over 4
159:
160: =item *
161:
162: constructaccess($url,$ownerdomain) : See if the owner domain and name
163: in the URL match those in the expected environment. If so, return
164: two element list ($ownername,$ownerdomain). Else, return null string.
165:
166: =back
167:
168: =cut
169:
170:
171:
172:
173:
174:
175:
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