Another possibility is with and external page.
However I think that implement a service is a better way.
Here my ExternalPage code that I use for images and other files...
-------------
public class BinaryOutput extends BasePage implements IExternalPage {
private Long _persistentId;
private String _mapKey;
private SerializableUploadFile _file;
private OutputStream _out;
public IMarkupWriter getResponseWriter(OutputStream out)
{
_out = out;
return new MimeWriter(_file.getContentType(),
getOutputEncoding(), out);
}
public void activateExternalPage(Object[] parameters, IRequestCycle
cycle) {
_persistentId = (Long) parameters[0];
_mapKey = (String) parameters[1];
PersistentPage page =
PersistentPageService.search(_persistentId.longValue());
_file = (SerializableUploadFile) page.getObjects().get(_mapKey);
}
public void renderPage(IMarkupWriter writer, IRequestCycle cycle) {
try
{
_out.write(_file.getContent());
_out.flush();
_out.close();
} catch (Exception e) {
throw new ApplicationRuntimeException(e);
}
}
}
> Is there any possibility I could show an image coming from an
> InputStream using Tapestry?
>
> The server needs to access Graphviz ( http://www.graphiz.org ) using JNI
> to create image files from a graph description. The output image from
> Graphviz is saved as a file (can't use a fixed file name, can be 1 - n
> files, etc.) on the HD. Afterwards this images must then be shown in the
> web page.
>
> Can anybody give me a hint on a) how to show images in a web page using
> an InputStream (from the file on the HD) or b) an alternative way to
> show these images?
>
>
>
> kind regards,
> Ruben
>
>
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