1: # The LearningOnline Network
2: # Cookie Based Access Handler
3: #
4: # $Id: publiccheck.pm,v 1.22 2013/12/13 01:34:38 raeburn 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($requrl)) {
47: if (($r->user() eq '') && ($Apache::lonnet::apache >= 2.4)) {
48: $r->user('public');
49: }
50: return OK;
51: }
52:
53: if ($requrl =~ m{^/res/adm/pages/[^/]+\.(gif|png)$}) {
54: if (($r->user() eq '') && ($Apache::lonnet::apache >= 2.4)) {
55: $r->user('public');
56: }
57: return OK;
58: }
59:
60: my $handle = &Apache::lonnet::check_for_valid_session($r);
61: if ($handle ne '') {
62: my $lonidsdir=$r->dir_config('lonIDsDir');
63: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
64: if ($env{'user.name'} ne 'public'
65: && $env{'user.domain'} ne 'public') {
66: return OK;
67: }
68: }
69: if ($requrl=~m|^/public/|
70: || $requrl=~m|^/adm/help/.*\.hlp$|
71: || $requrl=~m|^/adm/[^/]+/[^/]+/aboutme/portfolio$|
72: || (&Apache::lonnet::metadata($requrl,'copyright') eq 'public')
73: || $requrl=~m|^/adm/blockingstatus/.*$|) {
74: &process_public($r,$requrl);
75: return OK;
76: } elsif (&Apache::lonnet::is_portfolio_url($requrl)) {
77: my (undef,$udom,$unum,$file_name,$group) =
78: &Apache::lonnet::parse_portfolio_url($requrl);
79: my $access = &process_portfolio($udom,$unum,$file_name,$group);
80: if ($access) {
81: &process_public($r,$requrl,$access);
82: return OK;
83: }
84: } elsif ($requrl eq '/adm/restrictedaccess') {
85: &process_public($r,$requrl);
86: return OK;
87: } elsif ($requrl eq '/adm/blockedaccess') {
88: &process_public($r,$requrl);
89: return OK;
90: }
91: return DECLINED;
92: }
93:
94: sub process_public {
95: my ($r,$requrl,$access) = @_;
96: &Apache::lonnet::logthis('Granting public access: '.$requrl);
97: if ($env{'user.name'} ne 'public' && $env{'user.domain'} ne 'public') {
98: my $cookie=&Apache::lonauth::success($r,'public','public','public');
99: my $lonidsdir=$r->dir_config('lonIDsDir');
100: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$cookie);
101: $r->err_header_out('Set-cookie',"lonID=$cookie; path=/");
102: }
103: &Apache::lonacc::get_posted_cgi($r);
104: $env{'request.state'} = "published";
105: $env{'request.publicaccess'} = 1;
106: $env{'request.filename'} = $r->filename;
107: return;
108: }
109:
110: sub process_portfolio {
111: my ($udom,$unum,$file_name,$group) = @_;
112: my $current_perms = &Apache::lonnet::get_portfile_permissions($udom,$unum);
113: my %access_controls = &Apache::lonnet::get_access_controls($current_perms,$group,$file_name);
114: my $access = '';
115: my $now = time;
116: foreach my $key (keys(%{$access_controls{$file_name}})) {
117: my ($num,$scope,$end,$start) = ($key =~ /^([^:]+):([a-z]+)_(\d*)_?(\d*)$/);
118: if ($start > $now) {
119: next;
120: }
121: if ($end && $end<$now) {
122: next;
123: }
124: if ($scope eq 'public') {
125: $access = 'public';
126: last;
127: }
128: if ($scope eq 'guest') {
129: $access = 'guest';
130: }
131: }
132: return $access;
133: }
134:
135: 1;
136:
137: __END__
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