1: # The LearningOnline Network
2: # Cookie Based Access Handler
3: #
4: # $Id: publiccheck.pm,v 1.7 2006/07/17 19:49:14 albertel 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:
30: package Apache::publiccheck;
31:
32: use strict;
33: use Apache::Constants qw(:common :http :methods);
34: use Apache::lonnet;
35: use Apache::loncommon();
36: use Apache::lonlocal;
37: use CGI::Cookie();
38: use Fcntl qw(:flock);
39: use Apache::lonacc();
40:
41: sub handler {
42: my $r = shift;
43: my $requrl=$r->uri;
44: my %cookies=CGI::Cookie->parse($r->header_in('Cookie'));
45: my $lonid=$cookies{'lonID'};
46: if ($lonid) {
47: my $handle=$lonid->value;
48: $handle=~s/\W//g;
49: my $lonidsdir=$r->dir_config('lonIDsDir');
50: if ((-e "$lonidsdir/$handle.id") && ($handle ne '')) {
51: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
52: if ($env{'user.name'} ne 'public'
53: && $env{'user.domain'} ne 'public') {
54: return OK;
55: }
56: }
57: }
58: if ($requrl=~m|^/public/|
59: || $requrl=~m|^/adm/help/.*\.hlp$|
60: || (&Apache::lonnet::metadata($requrl,'copyright') eq 'public')) {
61: &process_public($r,$requrl);
62: return OK;
63: } elsif (&Apache::lonacc::is_portfolio_url($requrl)) {
64: my (undef,$udom,$unum,$file_name,$group) =
65: &Apache::lonacc::parse_portfolio_url($requrl);
66: my $access = &process_portfolio($udom,$unum,$file_name,$group);
67: if ($access) {
68: &process_public($r,$requrl,$access);
69: return OK;
70: }
71: } elsif ($requrl eq '/adm/restrictedaccess') {
72: &process_public($r,$requrl);
73: }
74: return DECLINED;
75: }
76:
77: sub process_public {
78: my ($r,$requrl,$access) = @_;
79: &Apache::lonnet::logthis('Granting public access: '.$requrl);
80: if ($env{'user.name'} ne 'public' && $env{'user.domain'} ne 'public') {
81: my $cookie=&Apache::lonauth::success($r,'public','public','public');
82: my $lonidsdir=$r->dir_config('lonIDsDir');
83: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$cookie);
84: $r->header_out('Set-cookie',"lonID=$cookie; path=/");
85: }
86: &Apache::lonacc::get_posted_cgi($r);
87: $env{'request.state'} = "published";
88: $env{'request.publicaccess'} = 1;
89: $env{'request.filename'} = $r->filename;
90: return;
91: }
92:
93: sub process_portfolio {
94: my ($udom,$unum,$file_name,$group) = @_;
95: my $current_perms = &Apache::lonnet::get_portfile_permissions($udom,$unum);
96: my %access_controls = &Apache::lonnet::get_access_controls($current_perms,$group,$file_name);
97: my $access = '';
98: my $now = time;
99: foreach my $key (keys(%{$access_controls{$file_name}})) {
100: my ($num,$scope,$end,$start) = ($key =~ /^([^:]+):([a-z]+)_(\d*)_?(\d*)$/);
101: if ($start > $now) {
102: next;
103: }
104: if ($end && $end<$now) {
105: next;
106: }
107: if ($scope eq 'public') {
108: $access = 'public';
109: last;
110: }
111: if ($scope eq 'guest') {
112: $access = 'guest';
113: }
114: }
115: return $access;
116: }
117:
118: 1;
119:
120: __END__
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