Wiki » History » Revision 4
Revision 3 (Soh Keong, 09/22/2004 03:16 AM) → Revision 4/5 (Soh Keong, 09/22/2004 03:25 AM)
{{toc}}
h1. Wiki
h1. Guides
h2. Demo URL
The URL is:
> http://192.168.2.68:8080/TestPage/page/captcha/recaptcha.jsp
h2. Steps By Steps
h3. Registration Create Public Key and Private Key
# Visit http://www.google.com/recaptcha/admin
# Sign in with your email and password (If no account with google, please proceed with sign up.)
# After sign in, Click on 'Add a New Site' button.
# Enter domain name in the text field, and click on the 'Create Key' button.
# Now, Public Key and Private Key is generated.
h3. Client site JSP
<pre>
<%@ page import="net.tanesha.recaptcha.ReCaptcha" %>
<%@ page import="net.tanesha.recaptcha.ReCaptchaFactory" %>
<html>
<body>
<form action="" method="post">
<%
ReCaptcha c = ReCaptchaFactory.newReCaptcha("your_public_key", "your_private_key", false);
out.print(c.createRecaptchaHtml(null, null));
%>
<input type="submit" value="submit" />
</form>
</body>
</html>
</pre>
h3. Server site JSP
<pre>
<%@ page import="net.tanesha.recaptcha.ReCaptchaImpl" %>
<%@ page import="net.tanesha.recaptcha.ReCaptchaResponse" %>
<html>
<body>
<%
String remoteAddr = request.getRemoteAddr();
ReCaptchaImpl reCaptcha = new ReCaptchaImpl();
reCaptcha.setPrivateKey("your_private_key");
String challenge = request.getParameter("recaptcha_challenge_field");
String uresponse = request.getParameter("recaptcha_response_field");
ReCaptchaResponse reCaptchaResponse = reCaptcha.checkAnswer(remoteAddr, challenge, uresponse);
if (reCaptchaResponse.isValid()) {
out.print("Answer was entered correctly!");
} else {
out.print("Answer is wrong");
}
%>
</body>
</html>
</pre>
h3. DNS Caching (Important)
-Dsun.net.inetaddr.ttl=30 to your app-server to avoid connection between your server and reCAPTCHA to be interrupted every few months.
* References: *
# https://www.google.com/recaptcha (Retrieved 29 July2013)
# https://developers.google.com/recaptcha/docs/java (Retrieved 29 July2013)