Upload file in background


Is there a function in outsystem tha will allow to upload a pdf file to the outsystem database in background? The file is going to be in a specific server.
Nothing that will do it in the background. Best thing to do is to write a REST Server to accept the file, then call it with jQuery.ajax() to send the file and receive confirmation.

Some of the various upload file widgets in the Forge may work in the background, but I've never used any of them.