Refresh SimpleCaptcha

Question

I'm using SimpleCaptcha

My web.xml looks like the one here:

<servlet>
    <servlet-name>StickyCaptcha</servlet-name>
    <servlet-class>nl.captcha.servlet.StickyCaptchaServlet</servlet-class>
    <init-param>
        <param-name>width</param-name>
        <param-value>250</param-value>
    </init-param>
    <init-param>
        <param-name>height</param-name>
        <param-value>75</param-value>
    </init-param>
</servlet>

<servlet-mapping>
    <servlet-name>StickyCaptcha</servlet-name>
    <url-pattern>/captcha</url-pattern>
</servlet-mapping>

And i added a refresh but to my view like described in this SO-answer:

<script type="text/javascript">
    function reloadCaptcha(){
        var d = new Date();
        $("#captcha_image").attr("src", "/captcha?"+d.getTime());
    }
</script>
   ...
<img id="captcha_image" src="/captcha_generator.jsp" alt="captcha image" width="200" height="50"/>
<img src="reload.jpg" onclick="reloadCaptcha()" alt="reload"width="40" height="40"/>

But when i press the refresh button, nothing happens. Also when i try to call .../captcha?4324321 it still prints the same captcha (based on the user session as i understood it)

I'm also using spring-mvc and spring-webflow.

Answer 1

Using nl.captcha.servlet.SimpleCaptchaServlet instead of nl.captcha.servlet.StickyCaptchaServlet solved the problem

because StickyCaptchaServlet uses the SessionId to create the image and SimpleCaptchaServlet doesn't

Answer 2

I think you may try: $("#captcha_image").attr("src", "/captcha_generator.jsp"); instead of: $("#captcha_image").attr("src", "/captcha?"+d.getTime());