use strict;
use CGI qw(:standard);
use Authen::Captcha;
my $output_dir = "/var/www/html/captcha";
my $www_output_dir = "/captcha";
my $db_dir = "/var/www/captchadb";
my $num_of_characters = 5;
my $captcha = Authen::Captcha->new(
output_folder => $output_dir,
data_folder => $db_dir
);
&main;
sub main
{
# import any get or post variables into the Q namespace
&load_cgi_variables();
if ($Q::code && $Q::crypt)
{
&check_code($Q::code, $Q::crypt);
} else {
&default;
}
}
sub default
{
my $md5sum = $captcha->generate_code($num_of_characters);
print header;
print "<HTML><HEAD></HEAD><BODY><FORM METHOD=post>
<INPUT TYPE=hidden name=crypt value=\"$md5sum\">
Please enter the characters in the image below: <INPUT TYPE=text name=code>
<BR>
<IMG SRC=\"$www_output_dir/$md5sum.png\"><BR>
<INPUT TYPE=submit>
</FORM></BODY></HTML>\n";
}
sub check_code
{
my ($code,$md5sum) = @_;
my $results = $captcha->check_code($code,$md5sum);
# $results will be one of:
my %result = (
1 => 'Passed',
0 => 'Code not checked (file error)',
-1 => 'Failed: code expired',
-2 => 'Failed: invalid code (not in database)',
-3 => 'Failed: invalid code (code does not match crypt)',
);
print header;
print "<HTML><HEAD></HEAD><BODY>Result was:<BR>\n";
print "$results : $result{$results}\n";
print "</BODY></HTML>\n";
}
sub load_cgi_variables
{
my $cgi = new CGI;
$cgi->import_names('Q');
}