Check out www.opendating.org which uses JCaptcha. The source code is
easily browsable from http://www.opendating.org/dev/javadoc/.
RegistrationCaptchaPage is what you want. You can download complete
source code from sourceforge.net/projects/opendating.
Regards,
Adam
On 4/17/06, Oscar Picasso <[EMAIL PROTECTED]> wrote:
> I'm going to try it in my application. Thanks.
>
> Konstantin Ignatyev <[EMAIL PROTECTED]> wrote: Just did the following and it
> seems to work beautifully
>
>
>
> public class JCaptchaServlet extends HttpServlet {
>
>
> protected void doGet(HttpServletRequest request, HttpServletResponse
> response) throws ServletException, IOException {
>
> String captchaID = request.getSession(true).getId();
>
> // call the ManageableImageCaptchaService methods
> byte[] captchaChallengeAsJpeg = null;
> ByteArrayOutputStream jpegOutputStream = new ByteArrayOutputStream();
> try {
> ImageCaptchaService srv = App.getCaptchaService();
> BufferedImage challenge = srv.getImageChallengeForID(captchaID,
> request.getLocale());
> Object challengeString = srv.getQuestionForID(captchaID,
> request.getLocale());
> // the output stream to render the captcha image as jpeg into
>
> // a jpeg encoder
> JPEGImageEncoder jpegEncoder =
> JPEGCodec.createJPEGEncoder(jpegOutputStream);
> jpegEncoder.encode(challenge);
> } catch (IllegalArgumentException e) {
> // log a security warning and return a 404...
> // if (log.isWarnEnabled())
> // {
> // log.warn(
> // "There was a try from "
> // + request.getRemoteAddr()
> // + " to render an URL without ID"
> // + " or with a too long one");
> // theResponse.sendError(HttpServletResponse.SC_NOT_FOUND);
> return;
> // }
> } catch (CaptchaServiceException e) {
> // log and return a 404 instead of an image...
> // log.warn(
> // "Error trying to generate a captcha and "
> // + "render its challenge as JPEG",
> // e);
> response.sendError(HttpServletResponse.SC_NOT_FOUND);
> return;
> }
>
> captchaChallengeAsJpeg = jpegOutputStream.toByteArray();
>
> // render the captcha challenge as a JPEG image in the response
> response.setHeader("Cache-Control", "no-store");
> response.setHeader("Pragma", "no-cache");
> response.setDateHeader("Expires", 0);
>
> response.setContentType("image/jpeg");
> ServletOutputStream responseOutputStream =
> response.getOutputStream();
> responseOutputStream.write(captchaChallengeAsJpeg);
> }
>
>
> }
>
> ------------
> private static ImageCaptchaService captchaService;
> private static Object captchaGuard = new Object();
>
> public static ImageCaptchaService getCaptchaService() {
> synchronized (captchaGuard) {
> if (captchaService == null) {
> captchaService = new EhcacheManageableImageCaptchaService( new
> SimpleListImageCaptchaEngine() , 180, 100000){
>
> };
> }
> return captchaService;
> }
> }
>
> ----------------------
>
>
>
> Validation
>
> @InjectObject( "service:tapestry.globals.HttpServletRequest")
> public abstract HttpServletRequest getHttpRequest();
>
> ............
> if( App.getCaptchaService().validateResponseForID(
> getHttpRequest().getSession(true).getId(), getCaptchaAnswer() )){
> System.out.println("CAPTCHA - Pass");
> }else{
>
>
>
> Oscar Picasso wrote: Do you have a code example of such an
> ImageCaptchaServlet?
>
> Daniel Lydiard wrote: I'm using Jcaptcha with my tapestry application.
>
> 1. Load the ImageCaptchaServlet in your web.xml.
>
>
> jcaptcha
>
> com.foo.ImageCaptchaServlet
>
> 1
>
>
>
>
>
>
> jcaptcha
>
> /jcaptcha
>
>
>
>
> 2. Do something like this in a component class method to get the captcha
> question.
> captchaId = getPage().getRequest().getSession(true).getId();
> return CaptchaServiceSingleton.getInstance().getQuestionForID(captchaId);
>
> 3. Point to the servlet for the captchaimage in your component .
>
> 4. To validate the user response
> captchaId = getRequest().getSession(true).getId();
>
> return
> CaptchaServiceSingleton.getInstance().validateResponseForID(captchaId,
> userResponse);
>
>
> Hope this helps.
>
>
> ----- Original Message -----
> From: "Oscar Picasso"
> To: "Tapestry users"
> Sent: Sunday, April 16, 2006 11:47 AM
> Subject: Re: Looking for a CATCHPA
>
>
> >I have taken a look. But I have no idea where to start. The api javadoc has
> >only one class: JCaptchaCommentAuthenticator. It seems there is a problem
> >with the site.
> >
> > Have you worked with JCaptcha? And do you know where to start?
> >
> > Oscar
> >
> >
> >
> > J�r�me BERNARD wrote: Have a loot at
> > http://jcaptcha.sourceforge.net/
> >
> > Regards,
> > J�r�me.
> >
> > On 4/16/06, Oscar Picasso wrote:
> >> Hi,
> >>
> >> I'm looking for a CATCHPA library to use with my Tapestry application.
> >> I'm looking for something easy to use and efficient.
> >>
> >> I welcome any advice.
> >>
> >> Oscar
> >>
> >>
> >> ---------------------------------
> >> Blab-away for as little as 1�/min. Make PC-to-Phone Calls using Yahoo!
> >> Messenger with Voice.
> >>
> >
> >
> > --
> > J�r�me BERNARD,
> > Kalixia, SARL.
> > http://weblog.kalixia.com
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: [EMAIL PROTECTED]
> > For additional commands, e-mail: [EMAIL PROTECTED]
> >
> >
> >
> >
> > ---------------------------------
> > Yahoo! Messenger with Voice. PC-to-Phone calls for ridiculously low rates.
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: [EMAIL PROTECTED]
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>
>
>
> __________________________________________________
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>
>
> Konstantin Ignatyev
>
>
>
>
> PS: If this is a typical day on planet earth, humans will add fifteen million
> tons of carbon to the atmosphere, destroy 115 square miles of tropical
> rainforest, create seventy-two miles of desert, eliminate between forty to
> one hundred species, erode seventy-one million tons of topsoil, add 2,700
> tons of CFCs to the stratosphere, and increase their population by 263,000
>
> Bowers, C.A. The Culture of Denial: Why the Environmental Movement Needs a
> Strategy for Reforming Universities and Public Schools. New York: State
> University of New York Press, 1997: (4) (5) (p.206)
>
>
> ---------------------------------
> New Yahoo! Messenger with Voice. Call regular phones from your PC and save
> big.
>
