1: # The LearningOnline Network
2: # Cookie Based Access Handler
3: #
4: # $Id: publiccheck.pm,v 1.18 2009/10/26 18:59:02 droeschl 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 Fcntl qw(:flock);
38: use Apache::lonacc();
39: use LONCAPA();
40:
41: sub handler {
42: my $r = shift;
43:
44: my $requrl=$r->uri;
45:
46: if (&Apache::lonnet::is_domainimage($requrl)) {
47: return OK;
48: }
49:
50: if ($requrl =~ m{^/res/adm/pages/[^/]+\.(gif|png)$}) {
51: return OK;
52: }
53:
54: my $handle = &Apache::lonnet::check_for_valid_session($r);
55: if ($handle ne '') {
56: my $lonidsdir=$r->dir_config('lonIDsDir');
57: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
58: if ($env{'user.name'} ne 'public'
59: && $env{'user.domain'} ne 'public') {
60: return OK;
61: }
62: }
63: if ($requrl=~m|^/public/|
64: || $requrl=~m|^/adm/help/.*\.hlp$|
65: || $requrl=~m|^/adm/[^/]+/[^/]+/aboutme/portfolio$|
66: || (&Apache::lonnet::metadata($requrl,'copyright') eq 'public')
67: || $requrl=~m|^/adm/blockingstatus/.*$|
68: || $requrl eq '/adm/coursecatalog') {
69: &process_public($r,$requrl);
70: return OK;
71: } elsif (&Apache::lonnet::is_portfolio_url($requrl)) {
72: my (undef,$udom,$unum,$file_name,$group) =
73: &Apache::lonnet::parse_portfolio_url($requrl);
74: my $access = &process_portfolio($udom,$unum,$file_name,$group);
75: if ($access) {
76: &process_public($r,$requrl,$access);
77: return OK;
78: }
79: } elsif ($requrl eq '/adm/restrictedaccess') {
80: &process_public($r,$requrl);
81: return OK;
82: } elsif ($requrl eq '/adm/blockedaccess') {
83: &process_public($r,$requrl);
84: return OK;
85: }
86: return DECLINED;
87: }
88:
89: sub process_public {
90: my ($r,$requrl,$access) = @_;
91: &Apache::lonnet::logthis('Granting public access: '.$requrl);
92: if ($env{'user.name'} ne 'public' && $env{'user.domain'} ne 'public') {
93: my $cookie=&Apache::lonauth::success($r,'public','public','public');
94: my $lonidsdir=$r->dir_config('lonIDsDir');
95: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$cookie);
96: $r->err_header_out('Set-cookie',"lonID=$cookie; path=/");
97: }
98: &Apache::lonacc::get_posted_cgi($r);
99: $env{'request.state'} = "published";
100: $env{'request.publicaccess'} = 1;
101: $env{'request.filename'} = $r->filename;
102: return;
103: }
104:
105: sub process_portfolio {
106: my ($udom,$unum,$file_name,$group) = @_;
107: my $current_perms = &Apache::lonnet::get_portfile_permissions($udom,$unum);
108: my %access_controls = &Apache::lonnet::get_access_controls($current_perms,$group,$file_name);
109: my $access = '';
110: my $now = time;
111: foreach my $key (keys(%{$access_controls{$file_name}})) {
112: my ($num,$scope,$end,$start) = ($key =~ /^([^:]+):([a-z]+)_(\d*)_?(\d*)$/);
113: if ($start > $now) {
114: next;
115: }
116: if ($end && $end<$now) {
117: next;
118: }
119: if ($scope eq 'public') {
120: $access = 'public';
121: last;
122: }
123: if ($scope eq 'guest') {
124: $access = 'guest';
125: }
126: }
127: return $access;
128: }
129:
130: 1;
131:
132: __END__
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