Post directly into Servoy Headless Client

Hello,

As far as I know it is/was not possible to post a (XML-)file directly into a Servoy Headless Client. In the situation I have, a jsp-page will check if a file was post, put the file on disk and calls a Servoy Headless Client with the filepath as argument.

Is this right, that the above situation is the only solution and will that be the same for Servoy 4.0?