Thanks for introducting the class to me, however look like this missing some object like session and request which I need
In fact I am going to output captcha according to jCaptcha example, it need request and session as follow. But can I do the same at WebResource? public ImageCaptcha() throws ImageFormatException, IOException { super(); final WebRequest httpServletRequest = (WebRequest)getRequest(); final WebResponse httpServletResponse = (WebResponse)getResponse(); byte[] captchaChallengeAsJpeg = null; // the output stream to render the captcha image as jpeg into ByteArrayOutputStream jpegOutputStream = new ByteArrayOutputStream(); // get the session id that will identify the generated captcha. // the same id must be used to validate the response, the session id is a good candidate! String captchaId = getSession().getId(); // call the ImageCaptchaService getChallenge method BufferedImage challenge = new DefaultManageableImageCaptchaService().getImageChallengeForID(captchaId, httpServletRequest.getLocale()); // a jpeg encoder JPEGImageEncoder jpegEncoder = JPEGCodec.createJPEGEncoder(jpegOutputStream); jpegEncoder.encode(challenge); captchaChallengeAsJpeg = jpegOutputStream.toByteArray(); // flush it in the response httpServletResponse.setHeader("Cache-Control", "no-store"); httpServletResponse.setHeader("Pragma", "no-cache"); httpServletResponse.setDateHeader("Expires", 0); httpServletResponse.setContentType("image/jpeg"); OutputStream responseOutputStream = httpServletResponse.getOutputStream(); responseOutputStream.write(captchaChallengeAsJpeg); responseOutputStream.flush(); responseOutputStream.close(); } On 11/22/06, Eelco Hillenius <[EMAIL PROTECTED]> wrote: > For binary output, use a (web)resource. For instance, something like this: > > WebResource export = new WebResource() { > > @Override > public IResourceStream getResourceStream() { > CharSequence discounts = DataBase.getInstance() > .exportDiscounts(); > return new StringResourceStream(discounts, "text/plain"); > } > > @Override > protected void setHeaders(WebResponse response) { > super.setHeaders(response); > response.setAttachmentHeader("discounts.csv"); > } > }; > export.setCacheable(false); > > new ResourceLink(this, "exportLink", export); > > > Eelco > > ------------------------------------------------------------------------- > Take Surveys. Earn Cash. Influence the Future of IT > Join SourceForge.net's Techsay panel and you'll get the chance to share your > opinions on IT & business topics through brief surveys - and earn cash > http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV > _______________________________________________ > Wicket-user mailing list > Wicket-user@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/wicket-user > ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Wicket-user mailing list Wicket-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wicket-user