Utilisation de JCaptcha avec JSF

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns="http://java.sun.com/xml/ns/javaee" 
        xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
        http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
	id="WebApp_ID" version="2.5">
	<display-name>Test App</display-name>
 
	<servlet>
		<servlet-name>jcaptcha</servlet-name>
		<servlet-class>com.octo.captcha.module.
                 servlet.image.SimpleImageCaptchaServlet</servlet-class>
	</servlet>
	<servlet-mapping>
		<servlet-name>jcaptcha</servlet-name>
		<url-pattern>/faces/jcaptcha.jpg</url-pattern>
	</servlet-mapping>
 
	<servlet>
		<servlet-name>Faces Servlet</servlet-name>
		<servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
		<load-on-startup>1</load-on-startup>
	</servlet>
	<servlet-mapping>
		<servlet-name>Faces Servlet</servlet-name>
		<url-pattern>/faces/*</url-pattern>
	</servlet-mapping>
 
        <welcome-file-list>
		<welcome-file>index.jsf</welcome-file>
		<welcome-file>index.xhtml</welcome-file>
	</welcome-file-list>
</web-app>

<h:form name="register">
<table>
	<tr>
		<td>Prénom</td>
		<td><h:inputText value="#{registrationBean.firstName}"
			required="true" /></td>
	</tr>
	<tr>
		<td>Nom</td>
		<td><h:inputText value="#{registrationBean.lastName}"
			required="true" /></td>
	</tr>
	<tr>
		<td>Nom d'utilisateur</td>
		<td><h:inputText value="#{registrationBean.username}"
			required="true" id="username" /></td>
	</tr>
	<tr>
		<td>email</td>
		<td><h:inputText value="#{registrationBean.email}"
			required="true" /></td>
	</tr>
	<tr>
		<td>password</td>
		<td><h:inputSecret value="#{registrationBean.password1}"
			required="true" /></td>
	</tr>
	<tr>
		<td>confirmer password</td>
		<td><h:inputSecret id="password2"
			value="#{registrationBean.password2}" required="true" />
		       <h:message for="password2" showSummary="false" showDetail="true" /></td>
	</tr>
	<tr>
		<td colspan="2">Code de vérification</td>
	</tr>
	<tr>
		<td colspan="2"><img src="jcaptcha.jpg" /><h:inputText
			name="jcaptcha" id="jcaptcha" required="true">
			<f:validator validatorId="captchaValidator" />
			</h:inputText> <h:message for="jcaptcha" styleClass="error" /></td>
	</tr>
	<tr>
		<td colspan="2"><h:commandButton value="Valider"
			action="#{registrationBean.register}" /></td>
	</tr>
</table>
</h:form>

package validator;
 
import javax.faces.application.FacesMessage;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.validator.Validator;
import javax.faces.validator.ValidatorException;
import javax.servlet.http.HttpServletRequest;
 
import org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestWrapper;
 
import com.octo.captcha.module.servlet.image.SimpleImageCaptchaServlet;
 
public class CaptchaValidator implements Validator {
 
	public static final String MATCHING_ERROR_MESSAGE = "Code de validation incorrect";
 
	@Override
	public void validate(FacesContext arg0, UIComponent arg1, Object arg2)throws ValidatorException {
 
		try {
			String userCaptchaResponse = (String)arg2;
			boolean captchaPassed = SimpleImageCaptchaServlet.validateResponse((HttpServletRequest) ((SecurityContextHolderAwareRequestWrapper)arg0.getExternalContext().getRequest()).getRequest(), userCaptchaResponse);
			if(!captchaPassed){
				throw new ValidatorException(new FacesMessage(MATCHING_ERROR_MESSAGE, MATCHING_ERROR_MESSAGE));
			}
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
}

<validator>
	<validator-id>captchaValidator</validator-id>
	<validator-class>validator.CaptchaValidator</validator-class>
</validator>