Annotation of loncom/auth/lonacc.pm, revision 1.46
1.1 albertel 1: # The LearningOnline Network
2: # Cookie Based Access Handler
1.22 www 3: #
1.46 ! www 4: # $Id: lonacc.pm,v 1.45 2003/05/06 21:45:25 albertel Exp $
1.22 www 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: #
1.25 harris41 28: # YEAR=1999
1.4 www 29: # 5/21/99,5/22,5/29,5/31,6/15,16/11,22/11,
1.25 harris41 30: # YEAR=2000
1.14 www 31: # 01/06,01/13,05/31,06/01,09/06,09/25,09/28,10/30,11/6,
1.17 www 32: # 12/25,12/26,
1.25 harris41 33: # YEAR=2001
1.23 www 34: # 01/06/01,05/28,8/11,9/26,11/29 Gerd Kortemeyer
1.26 www 35: # YEAR=2002
1.27 www 36: # 1/4,2/25 Gerd Kortemeyer
1.25 harris41 37: #
38: ###
1.1 albertel 39:
40: package Apache::lonacc;
41:
42: use strict;
1.8 www 43: use Apache::Constants qw(:common :http :methods);
1.2 www 44: use Apache::File;
1.6 www 45: use Apache::lonnet;
1.25 harris41 46: use Apache::loncommon();
1.1 albertel 47: use CGI::Cookie();
1.16 www 48: use Fcntl qw(:flock);
1.1 albertel 49:
50: sub handler {
51: my $r = shift;
52: my $requrl=$r->uri;
53: my %cookies=CGI::Cookie->parse($r->header_in('Cookie'));
54: my $lonid=$cookies{'lonID'};
55: my $cookie;
56: if ($lonid) {
57: my $handle=$lonid->value;
58: $handle=~s/\W//g;
59: my $lonidsdir=$r->dir_config('lonIDsDir');
60: if ((-e "$lonidsdir/$handle.id") && ($handle ne '')) {
1.6 www 61:
1.46 ! www 62: # ------------------------------------------------------ Initialize Environment
! 63:
! 64: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
! 65:
! 66: # -------------------------------------------------------------- Resource State
1.6 www 67:
1.18 www 68: if ($requrl=~/^\/res\//) {
1.17 www 69: $ENV{'request.state'} = "published";
70: } else {
71: $ENV{'request.state'} = 'unknown';
72: }
1.9 www 73: $ENV{'request.filename'} = $r->filename;
1.12 www 74:
1.6 www 75: # -------------------------------------------------------- Load POST parameters
76:
1.46 ! www 77: &Apache::loncommon::get_posted_cgi($r);
1.6 www 78:
79: # ---------------------------------------------------------------- Check access
80:
1.37 albertel 81: if ($requrl!~/^\/adm|public|prtspool\//) {
1.7 www 82: my $access=&Apache::lonnet::allowed('bre',$requrl);
83: if ($access eq '1') {
84: $ENV{'user.error.msg'}="$requrl:bre:0:0:Choose Course";
85: return HTTP_NOT_ACCEPTABLE;
86: }
87: if (($access ne '2') && ($access ne 'F')) {
88: $ENV{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
89: return HTTP_NOT_ACCEPTABLE;
90: }
1.23 www 91: }
1.37 albertel 92: if ($requrl =~ m|^/prtspool/|) {
93: my $start='/prtspool/'.$ENV{'user.name'}.'_'.
94: $ENV{'user.domain'};
95: if ($requrl !~ /^\Q$start\E/) {
96: $ENV{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
97: return HTTP_NOT_ACCEPTABLE;
98: }
99: }
1.23 www 100: # ------------------------------------------------------------- This is allowed
101: if ($ENV{'request.course.id'}) {
1.24 www 102: &Apache::lonnet::countacc($requrl);
1.23 www 103: $requrl=~/\.(\w+)$/;
1.39 www 104: if ((&Apache::loncommon::fileembstyle($1) eq 'ssi') ||
1.44 www 105: ($requrl=~/^\/adm\/.*\/(aboutme|navmaps|smppg|bulletinboard)(\?|$)/) ||
106: ($requrl=~/^\/adm\/wrapper\//) ||
1.39 www 107: ($requrl=~/^\/public\/.*\/syllabus$/)) {
1.23 www 108: # ------------------------------------- This is serious stuff, get symb and log
1.29 www 109: my $query=$r->args;
110: my $symb;
111: if ($query) {
112: &Apache::loncommon::get_unprocessed_cgi($query,['symb']);
113: }
114: if ($ENV{'form.symb'}) {
1.31 www 115: $symb=&Apache::lonnet::symbclean($ENV{'form.symb'});
116: if (&Apache::lonnet::symbverify($symb,$requrl)) {
117: my ($map,$mid,$murl)=split(/\_\_\_/,$symb);
118: &Apache::lonnet::symblist($map,$murl => $mid,
119: 'last_known' => $murl);
120: } else {
121: $r->log_reason('Invalid symb for '.$requrl.': '.
122: $symb);
123: $ENV{'user.error.msg'}=
124: "$requrl:bre:1:1:Invalid Access";
125: return HTTP_NOT_ACCEPTABLE;
126: }
1.29 www 127: } else {
1.44 www 128: $symb=&Apache::lonnet::symbread($requrl);
129: my ($map,$mid,$murl)=split(/\_\_\_/,$symb);
130: &Apache::lonnet::symblist($map,$murl => $mid,
131: 'last_known' => $murl);
1.29 www 132: }
1.23 www 133: $ENV{'request.symb'}=$symb;
134: &Apache::lonnet::courseacclog($symb);
135: } else {
136: # ------------------------------------------------------- This is other content
137: &Apache::lonnet::courseacclog($requrl);
138: }
139: }
1.2 www 140: return OK;
1.1 albertel 141: } else {
1.5 www 142: $r->log_reason("Cookie $handle not valid", $r->filename)
1.1 albertel 143: };
144: }
1.6 www 145:
1.21 www 146: # -------------------------------------------- See if this is a public resource
1.37 albertel 147: if ($requrl=~m|^/public/|
148: || (&Apache::lonnet::metadata($requrl,'copyright') eq 'public')) {
1.21 www 149: &Apache::lonnet::logthis('Granting public access: '.$requrl);
1.42 albertel 150: my $buffer;
1.45 albertel 151: $r->read($buffer,$r->header_in('Content-length'),0);
1.42 albertel 152: &Apache::loncommon::get_unprocessed_cgi($buffer);
1.21 www 153: $ENV{'user.name'}='public';
154: $ENV{'user.domain'}='public';
155: $ENV{'request.state'} = "published";
156: $ENV{'request.publicaccess'} = 1;
157: $ENV{'request.filename'} = $r->filename;
158: return OK;
159: }
1.34 www 160: # -------------------------------------------------------------- Not authorized
161: $requrl=~/\.(\w+)$/;
162: if ((&Apache::loncommon::fileembstyle($1) eq 'ssi') ||
1.41 www 163: ($requrl=~/^\/adm\/(roles|logout|email|menu|remote)/) ||
1.37 albertel 164: ($requrl=~m|^/prtspool/|)) {
1.34 www 165: # -------------------------- Store where they wanted to go and get login screen
1.40 www 166: $ENV{'request.querystring'}=$r->args;
167: $ENV{'request.firsturl'}=$requrl;
1.34 www 168: return FORBIDDEN;
169: } else {
170: # --------------------------------------------------------------------- Goodbye
171: return HTTP_BAD_REQUEST;
172: }
1.1 albertel 173: }
174:
175: 1;
176: __END__
1.25 harris41 177:
178: =head1 NAME
179:
180: Apache::lonacc - Cookie Based Access Handler
181:
182: =head1 SYNOPSIS
183:
184: Invoked (for various locations) by /etc/httpd/conf/srm.conf:
185:
186: PerlAccessHandler Apache::lonacc
187:
188: =head1 INTRODUCTION
189:
190: This module enables cookie based authentication and is used
191: to control access for many different LON-CAPA URIs.
192:
193: Whenever the client sends the cookie back to the server,
194: this cookie is handled by either lonacc.pm or loncacc.pm
195: (see srm.conf for what is invoked when). If
196: the cookie is missing or invalid, the user is re-challenged
197: for login information.
198:
199: This is part of the LearningOnline Network with CAPA project
200: described at http://www.lon-capa.org.
201:
202: =head1 HANDLER SUBROUTINE
203:
204: This routine is called by Apache and mod_perl.
205:
206: =over 4
207:
208: =item *
209:
210: transfer profile into environment
211:
212: =item *
213:
214: load POST parameters
215:
216: =item *
217:
218: check access
219:
220: =item *
221:
222: if allowed, get symb, log, generate course statistics if applicable
223:
224: =item *
225:
226: otherwise return error
227:
228: =item *
229:
230: see if public resource
231:
232: =item *
233:
234: store attempted access
235:
236: =back
237:
238: =cut
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