File:
[LON-CAPA] /
loncom /
cgi /
loncgi.pm
Revision
1.1:
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Thu Oct 9 22:04:37 2003 UTC (20 years, 11 months ago) by
matthew
Branches:
MAIN
CVS tags:
version_1_3_X,
version_1_3_3,
version_1_3_2,
version_1_3_1,
version_1_3_0,
version_1_2_X,
version_1_2_99_1,
version_1_2_99_0,
version_1_2_1,
version_1_2_0,
version_1_1_X,
version_1_1_99_5,
version_1_1_99_4,
version_1_1_99_3,
version_1_1_99_2,
version_1_1_99_1,
version_1_1_99_0,
version_1_1_3,
version_1_1_2,
version_1_1_1,
version_1_1_0,
version_1_0_99_3,
version_1_0_99_2,
version_1_0_99_1,
version_1_0_99,
HEAD
Adding loncgi.pm, which enables the use of the users environment to pass data.
Reworked graph.png to give error messages in htmlese and use loncgi.pm.
This change is not backwards compatable and I will be updating the modules which
use graph.png to use the new convention.
1: #
2: # LON-CAPA helpers for cgi-bin scripts
3: #
4: # $Id: loncgi.pm,v 1.1 2003/10/09 22:04:37 matthew 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:
31: =pod
32:
33: =head1 NAME
34:
35: loncgi
36:
37: =head1 SYNOPSIS
38:
39: Provides subroutines for checking a LON-CAPA cookie and loading the users
40: environment.
41:
42: =head1 Subroutines
43:
44: =over 4
45:
46: =cut
47:
48: #############################################
49: #############################################
50: package LONCAPA::loncgi;
51:
52: use strict;
53: use warnings FATAL=>'all';
54: no warnings 'uninitialized';
55: use CGI();
56: use CGI::Cookie();
57: use Fcntl qw(:flock);
58: use LONCAPA::Configuration();
59:
60: my $lonidsdir;
61:
62: BEGIN {
63: my $perlvar=LONCAPA::Configuration::read_conf('loncapa.conf');
64: delete $perlvar->{'lonReceipt'};
65: $lonidsdir = $perlvar->{'lonIDsDir'};
66: }
67:
68: #############################################
69: #############################################
70:
71: =pod
72:
73: =item check_cookie_and_load_env
74:
75: Inputs: none
76:
77: Returns: 1 if the user has a LON-CAPA cookie 0 if not.
78: Loads the users environment into the %ENV hash if the cookie is correct.
79:
80: =cut
81:
82: #############################################
83: #############################################
84: sub check_cookie_and_load_env {
85: my %cookies=fetch CGI::Cookie;
86: if (exists($cookies{'lonID'}) &&
87: -e "$lonidsdir/".$cookies{'lonID'}->value.".id") {
88: # cookie found
89: &transfer_profile_to_env($cookies{'lonID'}->value);
90: return 1;
91: } else {
92: # No cookie found
93: return 0;
94: }
95: }
96:
97: #############################################
98: #############################################
99:
100: =pod
101:
102: =item check_cookie
103:
104: Inputs: none
105:
106: Returns: 1 if the user has a LON-CAPA cookie and 0 if not.
107:
108: =cut
109:
110: #############################################
111: #############################################
112: sub check_cookie {
113: my %cookies=fetch CGI::Cookie;
114: if (exists($cookies{'lonID'}) &&
115: -e "$lonidsdir/".$cookies{'lonID'}->value.".id") {
116: # cookie found
117: return 1;
118: } else {
119: # No cookie found
120: return 0;
121: }
122: }
123:
124: #############################################
125: #############################################
126:
127: =pod
128:
129: =item transfer_profile_to_env
130:
131: Load the users environment into the %ENV hash.
132:
133: Inputs: $handle, the name of the users LON-CAPA cookie.
134:
135: Returns: undef
136:
137: =cut
138:
139: #############################################
140: #############################################
141: sub transfer_profile_to_env {
142: my ($handle)=@_;
143: my @profile;
144: {
145: open(IDFILE, "<$lonidsdir/$handle.id");
146: flock(IDFILE,LOCK_SH);
147: @profile=<IDFILE>;
148: close(IDFILE);
149: }
150: foreach my $envrow (@profile) {
151: chomp($envrow);
152: my ($envname,$envvalue)=split(/=/,$envrow);
153: $ENV{$envname} = $envvalue;
154: }
155: $ENV{'user.environment'} = "$lonidsdir/$handle.id";
156: return undef;
157: }
158:
159: #############################################
160: #############################################
161:
162: =pod
163:
164: =back
165:
166: =cut
167:
168: 1;
169:
170: __END__
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