Sorry I don't have time to go into code right now. It seems most people will do this purely on the client side. See e.g.
http://www.openjs.com/articles/ajax/ajax_file_upload/ for a sketch of how to do file upload without refreshing the page using a hidden iframe. Thu, Sep 23, 2010 at 5:21 AM, Eduardo Bellani <[email protected]> wrote: > * A way to keep polling the server and update a field in the page with > the %. I am thinking about just saving the address to a function in > a hidden field. I would use that function to return the % based on > how much of the file is already written to disk. If you really want to get a stream of information from the server you are better of doing a "comet" request than continuously polling. On the client side you call a URL using XMLHttpRequest. On the server side you leave the connection open, and just pump data down it as it becomes available. E.g. the server could send a stream of numbers showing how many bytes have been uploaded. Use make-response/incremental for this. OTOH I don't think the web server allows you to intercept the request parsing without going to quite a low level. In most setups the web server will have already parsed the file into a bytes before your servlet runs. > * A way to know the full size of the file being uploaded. Outside of checking the size of the uploaded form data I don't know of a way. HTH, N. _________________________________________________ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/users
