You can always do RequestCycle.get() (or
((WebRequest)RequestCycle.get())) to get the current request cycle, on
which you can then call get(Web)Request and get(Web)Response
Eelco
On 11/21/06, Carfield Yim <[EMAIL PROTECTED]> wrote:
> 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
> >
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