Hi Puneeth,
Please follow these below steps to create and validate the captcha. Hope it will help you.
Generate CaptchaIn JSPPortlet class we need to add method serverResource - something like this:
public class CaptchaSamplePortlet extends JSPPortlet {
/** Serve Resource used for getting captcha
*
*/
@Override
public void serveResource(ResourceRequest resourceRequest,
ResourceResponse resourceResponse) throws IOException, PortletException {
try {
com.liferay.portal.kernel.captcha.CaptchaUtil.serveImage(resourceRequest, resourceResponse);
} catch (Exception e) {
log.error(e);
}
}
}
This method doing everything - generated captcha and returned it's content (with all required http-readers into response), as well as placed required data into session
Display CaptchaNow, to place captcha into jsp you need to place:
<portlet:resourceURL var="captchaURL"/>
<liferay-ui:captcha url="<%= captchaURL %>"/>
That will place captcha control and point it to our portlet resourceURL to generate image
Now, you will have captcha and field to enter captcha text on your form generated by these tags.
Validate CaptchaTo check captcha add followed function in your action-handler in portlet-class:
private void checkCaptcha(PortletRequest request) throws Exception {
String enteredCaptchaText = ParamUtil.getString(request, "captchaText");
PortletSession session = request.getPortletSession();
String captchaText = getCaptchaValueFromSession(session);
if (Validator.isNull(captchaText)) {
throw new Exception("Internal Error! Captcha text not found in session");
}
if (!StringUtils.equals(captchaText, enteredCaptchaText)) {
throw new Exception("Invalid captcha text. Please reenter.");
}
}
private String getCaptchaValueFromSession(PortletSession session) {
Enumeration<String> atNames = session.getAttributeNames();
while (atNames.hasMoreElements()) {
String name = atNames.nextElement();
if (name.contains("CAPTCHA_TEXT")) {
return (String) session.getAttribute(name);
}
}
return null;
}
What is all - now, you can do everything - display captcha, enter value - and check it
