I've got a need to show an Upload progress bar in a Wicket app that
I've built. We're uploading some fairly large files and would like
to see some statuses. Figured out with Igor how to go about
injecting a CountingInputStream into the process for FileUpload, but
have run into a roadblock!
What ends up happening, is the page runs a javascript, to show
another page that meta refreshes and shows a status grabbed from the
session. And at the same time submits the form to start the upload.
Only problem is, it seems to block on the form submission uploading
the file, and never shows the status page until after its done
processing the form. Obviously too late.
Igor mentioned that this was probably because Wicket synchronizes
with the session. And we both think there must be a way around this
that is missing.
the code I have overrides:
protected WebRequest newWebRequest(HttpServletRequest servletRequest)
and then subclasses ServletWebRequest offering a wrapped
MultipartServletWebRequest which passes back a custom FileItem that
wraps the InputStream in a CountingInputStream, that in turn updates
the Session. Whew! That was long.
Ideas and thoughts?
Thanks!
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