#!/usr/bin/perl

# The LearningOnline Network with CAPA
# thumbnail.gif - a CGI script that ships out the thumbnail
#
# Copyright Michigan State University Board of Trustees
#
# This file is part of the LearningOnline Network with CAPA (LON-CAPA).
#
# LON-CAPA is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# LON-CAPA is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with LON-CAPA; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#
# /home/httpd/html/adm/gpl.txt
#
# http://www.lon-capa.org/
#
# Scott Harrison
# YEAR=2001
# 8/15,9/28,12/11
#
###

# Example usage: /cgi-bin/thumbnail.gif?url=...

use strict;

$|=1;   # Autoflush after each print/write
foreach (split(/&/,$ENV{'QUERY_STRING'})) {
    my ($name, $value) = split(/=/,$_);
    $value =~ tr/+/ /;
    $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
    if ($name eq 'url') {
	$ENV{'form.'.$name}=$value;
    }
}

# Tell the server we are sending a gif graphic
print <<END;
Content-type: image/gif

END

my $fn='/home/httpd/html/res/adm/pages/nothumb.gif';
open (IN,$fn);
binmode(STDOUT);
print join('',<IN>); # output image
$|=1; # be sure to flush before closing
close IN;