You could probably do an AIR app that could do this. You need to be able to read the bytes of the file inside your app, that's a no-go for a SWF running inside somebody's browser (unless they give you special permissions, and even then there's no controls available for browsing to the file, etc.)
>From AIR, you have flash.filesystem.* package. You can browse local file system and open up the file as FileStream. Then you can use any algorithm you want to alter the bytes before sending them to the server. -- Michael --- In flexcoders@yahoogroups.com, "fgamador" <[EMAIL PROTECTED]> wrote: > > Is it possible to write a Flash/Flex/AIR app that compresses large > files during upload (ideally using gzip)? As far as I can tell, > FileReference (and URLRequest) do not support this. Is there any > other way? > > Thanks in advance for any tips. >