FormMail Captcha
From KOP KB
This is where you can signup for the keys https://www.google.com/recaptcha/admin#whyrecaptcha
Contents
Referrers and Recipients
Make sure the customer has this set up properly as well
#whatever domains they decided to use should go in referrers.
@referers = ('www.domain.com','domain.com');
# @recipients defines the e-mail addresses or domain names that e-mail can #
# be sent to. This must be filled in correctly to prevent SPAM and allow #
# valid addresses to receive e-mail. Read the documentation to find out how #
# this variable works!!! It is EXTREMELY IMPORTANT. #
# If we are troubleshooting the receiving make sure this has a string of the email and not a variable #
@recipients = '[email protected]';
Use LWP
This will need to be put just before it shows all the &check's down the page
use LWP::UserAgent;
Calling the Check Captcha
You can add this anywhere near &check lines
# Check the captcha challenge and response.
&check_captcha;
Checking the Captcha
This actually checks the captcha that was typed in
##############################################################################
# Check the CAPTCHA response via the reCAPTCHA service.
sub check_captcha {
my $ua = LWP::UserAgent->new();
my $result=$ua->post(
'http://www.google.com/recaptcha/api/verify',
{
privatekey => 'your_private_key',
remoteip => $ENV{'REMOTE_ADDR'},
challenge => $Form{'recaptcha_challenge_field'},
response => $Form{'recaptcha_response_field'}
});
if ( $result->is_success && $result->content =~ /^true/) {
return;
} else {
&error('captcha_failed');
}
}
Captcha Failure Message
Make sure you put this behind the correct elseif bracket or else this will error
elsif ($error eq 'captcha_failed') {
print <<"(END ERROR HTML)";
Content-type: text/html
<html>
<head>
<title>Error: Captcha Check Failed</title>
</head>
<body bgcolor=#FFFFFF text=#000000>
<center>
<table border=0 width=600 bgcolor=#9C9C9C>
<tr><th><font size=+2>Error: Captcha Check Failed</font></th></tr%gt;
</table>
<table border=0 width=600 bgcolor=#CFCFCF>
<tr><td>The Captcha response of the form you submitted did not match the challenge.
Please check the form and make sure that your response matches the challenge in the captcha image.
You can use the browser back button to return to the form.
</center%gt;
</td></tr>
</table>
</center>
</body>
</html>
(END ERROR HTML)
}
The Html Form Page
You will want to place this just before the submit button and hopefully the form is in a large enough area to fit.
<script type="text/javascript"
src="http://www.google.com/recaptcha/api/challenge?k=your_public_key">
</script>
<noscript>
<iframe src="http://www.google.com/recaptcha/api/noscript?k=your_public_key"
height="300" width="500" frameborder="0"></iframe>
<textarea name="recaptcha_challenge_field" rows="3" cols="40">
</textarea><br>
<input type="hidden" name="recaptcha_response_field"
value="manual_challenge">
</noscript>
