Annotation of loncom/auth/lonacc.pm, revision 1.38
1.1 albertel 1: # The LearningOnline Network
2: # Cookie Based Access Handler
1.22 www 3: #
1.38 ! harris41 4: # $Id: lonacc.pm,v 1.37 2002/11/06 22:43:27 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:
62: # ------------------------------------------- Transfer profile into environment
63:
1.2 www 64: my @profile;
65: {
66: my $idf=Apache::File->new("$lonidsdir/$handle.id");
1.16 www 67: flock($idf,LOCK_SH);
1.2 www 68: @profile=<$idf>;
1.16 www 69: $idf->close();
1.2 www 70: }
71: my $envi;
72: for ($envi=0;$envi<=$#profile;$envi++) {
73: chomp($profile[$envi]);
74: my ($envname,$envvalue)=split(/=/,$profile[$envi]);
1.9 www 75: $ENV{$envname} = $envvalue;
1.2 www 76: }
1.9 www 77: $ENV{'user.environment'} = "$lonidsdir/$handle.id";
1.18 www 78: if ($requrl=~/^\/res\//) {
1.17 www 79: $ENV{'request.state'} = "published";
80: } else {
81: $ENV{'request.state'} = 'unknown';
82: }
1.9 www 83: $ENV{'request.filename'} = $r->filename;
1.12 www 84:
1.6 www 85: # -------------------------------------------------------- Load POST parameters
86:
1.8 www 87:
88:
1.14 www 89: my $buffer;
1.6 www 90:
1.14 www 91: $r->read($buffer,$r->header_in('Content-length'));
92: unless ($buffer=~/^(\-+\w+)\s+Content\-Disposition\:\s*form\-data/si) {
1.5 www 93: my @pairs=split(/&/,$buffer);
1.6 www 94: my $pair;
1.5 www 95: foreach $pair (@pairs) {
1.6 www 96: my ($name,$value) = split(/=/,$pair);
97: $value =~ tr/+/ /;
98: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
1.10 www 99: $name =~ tr/+/ /;
100: $name =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
1.28 albertel 101: &Apache::loncommon::add_to_env("form.$name",$value);
1.6 www 102: }
1.14 www 103: } else {
104: my $contentsep=$1;
105: my @lines = split (/\n/,$buffer);
106: my $name='';
107: my $value='';
108: my $fname='';
109: my $fmime='';
110: my $i;
111: for ($i=0;$i<=$#lines;$i++) {
112: if ($lines[$i]=~/^$contentsep/) {
113: if ($name) {
114: chomp($value);
115: if ($fname) {
116: $ENV{"form.$name.filename"}=$fname;
117: $ENV{"form.$name.mimetype"}=$fmime;
1.15 www 118: } else {
119: $value=~s/\s+$//s;
1.14 www 120: }
1.28 albertel 121: &Apache::loncommon::add_to_env("form.$name",$value);
1.14 www 122: }
123: if ($i<$#lines) {
124: $i++;
125: $lines[$i]=~
126: /Content\-Disposition\:\s*form\-data\;\s*name\=\"([^\"]+)\"/i;
127: $name=$1;
128: $value='';
129: if ($lines[$i]=~/filename\=\"([^\"]+)\"/i) {
130: $fname=$1;
131: if
132: ($lines[$i+1]=~/Content\-Type\:\s*([\w\-\/]+)/i) {
133: $fmime=$1;
134: $i++;
135: } else {
136: $fmime='';
137: }
138: } else {
139: $fname='';
140: $fmime='';
141: }
142: $i++;
143: }
144: } else {
145: $value.=$lines[$i]."\n";
146: }
147: }
148: }
1.26 www 149: $ENV{'request.method'}=$ENV{'REQUEST_METHOD'};
1.8 www 150: $r->method_number(M_GET);
151: $r->method('GET');
152: $r->headers_in->unset('Content-length');
1.6 www 153:
154: # ---------------------------------------------------------------- Check access
155:
1.37 albertel 156: if ($requrl!~/^\/adm|public|prtspool\//) {
1.7 www 157: my $access=&Apache::lonnet::allowed('bre',$requrl);
158: if ($access eq '1') {
159: $ENV{'user.error.msg'}="$requrl:bre:0:0:Choose Course";
160: return HTTP_NOT_ACCEPTABLE;
161: }
162: if (($access ne '2') && ($access ne 'F')) {
163: $ENV{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
164: return HTTP_NOT_ACCEPTABLE;
165: }
1.23 www 166: }
1.37 albertel 167: if ($requrl =~ m|^/prtspool/|) {
168: my $start='/prtspool/'.$ENV{'user.name'}.'_'.
169: $ENV{'user.domain'};
170: if ($requrl !~ /^\Q$start\E/) {
171: $ENV{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
172: return HTTP_NOT_ACCEPTABLE;
173: }
174: }
1.23 www 175: # ------------------------------------------------------------- This is allowed
176: if ($ENV{'request.course.id'}) {
1.24 www 177: &Apache::lonnet::countacc($requrl);
1.23 www 178: $requrl=~/\.(\w+)$/;
1.25 harris41 179: if (&Apache::loncommon::fileembstyle($1) eq 'ssi') {
1.23 www 180: # ------------------------------------- This is serious stuff, get symb and log
1.29 www 181: my $query=$r->args;
182: my $symb;
183: if ($query) {
184: &Apache::loncommon::get_unprocessed_cgi($query,['symb']);
185: }
186: if ($ENV{'form.symb'}) {
1.31 www 187: $symb=&Apache::lonnet::symbclean($ENV{'form.symb'});
188: if (&Apache::lonnet::symbverify($symb,$requrl)) {
189: my ($map,$mid,$murl)=split(/\_\_\_/,$symb);
190: &Apache::lonnet::symblist($map,$murl => $mid,
191: 'last_known' => $murl);
192: } else {
193: $r->log_reason('Invalid symb for '.$requrl.': '.
194: $symb);
195: $ENV{'user.error.msg'}=
196: "$requrl:bre:1:1:Invalid Access";
197: return HTTP_NOT_ACCEPTABLE;
198: }
1.29 www 199: } else {
200: $symb=&Apache::lonnet::symbread;
201: }
1.23 www 202: $ENV{'request.symb'}=$symb;
203: &Apache::lonnet::courseacclog($symb);
204: } else {
205: # ------------------------------------------------------- This is other content
206: &Apache::lonnet::courseacclog($requrl);
207: }
208: }
1.2 www 209: return OK;
1.1 albertel 210: } else {
1.5 www 211: $r->log_reason("Cookie $handle not valid", $r->filename)
1.1 albertel 212: };
213: }
1.6 www 214:
1.21 www 215: # -------------------------------------------- See if this is a public resource
1.37 albertel 216: if ($requrl=~m|^/public/|
217: || (&Apache::lonnet::metadata($requrl,'copyright') eq 'public')) {
1.21 www 218: &Apache::lonnet::logthis('Granting public access: '.$requrl);
219: $ENV{'user.name'}='public';
220: $ENV{'user.domain'}='public';
221: $ENV{'request.state'} = "published";
222: $ENV{'request.publicaccess'} = 1;
223: $ENV{'request.filename'} = $r->filename;
224: return OK;
225: }
1.34 www 226: # -------------------------------------------------------------- Not authorized
227: $requrl=~/\.(\w+)$/;
228: if ((&Apache::loncommon::fileembstyle($1) eq 'ssi') ||
1.37 albertel 229: ($requrl=~/^\/adm\/(roles|logout)/) ||
230: ($requrl=~m|^/prtspool/|)) {
1.34 www 231: # -------------------------- Store where they wanted to go and get login screen
232: $ENV{'request.firsturl'}=$requrl;
233: return FORBIDDEN;
234: } else {
235: # --------------------------------------------------------------------- Goodbye
236: return HTTP_BAD_REQUEST;
237: }
1.1 albertel 238: }
239:
240: 1;
241: __END__
1.25 harris41 242:
243: =head1 NAME
244:
245: Apache::lonacc - Cookie Based Access Handler
246:
247: =head1 SYNOPSIS
248:
249: Invoked (for various locations) by /etc/httpd/conf/srm.conf:
250:
251: PerlAccessHandler Apache::lonacc
252:
253: =head1 INTRODUCTION
254:
255: This module enables cookie based authentication and is used
256: to control access for many different LON-CAPA URIs.
257:
258: Whenever the client sends the cookie back to the server,
259: this cookie is handled by either lonacc.pm or loncacc.pm
260: (see srm.conf for what is invoked when). If
261: the cookie is missing or invalid, the user is re-challenged
262: for login information.
263:
264: This is part of the LearningOnline Network with CAPA project
265: described at http://www.lon-capa.org.
266:
267: =head1 HANDLER SUBROUTINE
268:
269: This routine is called by Apache and mod_perl.
270:
271: =over 4
272:
273: =item *
274:
275: transfer profile into environment
276:
277: =item *
278:
279: load POST parameters
280:
281: =item *
282:
283: check access
284:
285: =item *
286:
287: if allowed, get symb, log, generate course statistics if applicable
288:
289: =item *
290:
291: otherwise return error
292:
293: =item *
294:
295: see if public resource
296:
297: =item *
298:
299: store attempted access
300:
301: =back
302:
303: =cut
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