org.shredzone.commons.captcha

Interface CaptchaService

All Known Implementing Classes:

DefaultCaptchaService

public interface CaptchaService

Service for handling click based captchas.

In a first step, the captcha is created, and the correct answer is stored in the http session.

In a second step, the coordinates of the user's click within the captcha is evaluated.

Author:

Richard "Shred" Körber

Method Summary

Modifier and Type	Method and Description
BufferedImage	createCaptcha(HttpSession session) Creates a random captcha.
boolean	isValidCaptcha(HttpSession session, int x, int y) Checks if the captcha answer is valid.

Method Detail

createCaptcha

BufferedImage createCaptcha(HttpSession session)

Creates a random captcha. The correct answer is stored in the session.

Parameters:

session - HttpSession to store the answer in

Returns:

BufferedImage generated captcha

isValidCaptcha

boolean isValidCaptcha(HttpSession session,
                       int x,
                       int y)

Checks if the captcha answer is valid.

Parameters:

session - HttpSession that contains the correct answer

x - x position of the mouse click

y - y position of the mouse click

Returns:

true if the captcha has been correctly answered