How to send an XML file via HTTP_POST

I have an ABAP program that creates an XML file and I need to somehow post this XML file to a webserver and read the HTTP Response that it sends back. I see that there is a function module called HTTP_POST but I've never used it before. I also see that there are a number of ABAP Objects related to HTTP. Has anyone done this before.

I'm on SAP 4.7 (6.20)

Thank you,