Google reCAPTCHA 2 Component for Vaadin

Provides a simple Google reCAPTCHA v2 component for Vaadin. See https://developers.google.com/recaptcha/ for more information.

Usage

1. Generate your reCAPTCHA keys on http://www.google.com/recaptcha/intro/index.html

2. Include the artifact in your POM:

   <dependency>
   	<groupId>com.anton-johansson<groupId>
   	<artifactId>vaadin-recaptcha</artifactId>
   	<version>2.0.0</version>
   </dependency>

3. Include the reCAPTCHA JavaScript in your UI:

   @JavaScript("https://www.google.com/recaptcha/api.js")
   public class CustomUI extends UI
   {
       ...
   }

4. Add the Recaptcha-component to your UI:

   String siteKey = "...";
   String secretKey = "...";
   Recaptcha captcha = new Recaptcha(siteKey, secretKey);
   layout.addComponent(captcha);

5. Optionally set extra properties on your component:

   captcha.setType(RecaptchaType.AUDIO);
   captcha.setTheme(RecaptchaTheme.DARK);
   captcha.setSize(RecaptchaSize.COMPACT);

6. Validate the user input:

   if (!captcha.isVerified())
   {
       ...
   }

License

Apache License © Anton Johansson