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The XML part has no use. Try file.

What did you search on Google for? How to upload file using HTTP POST

I don't know the spelling. Something from Apache for HTTP requests.

There is a package with the Apache project that helps sending HTTP requests.
Also did you try google?

Sounds like you want to upload a file that contains XML statements to the server using the HTTP protocol.
Have you tried using google for how to upload file to server using HTTP?

What do you mean by an "XML request"? What protocols does the server respond to?
The most common is HTTP.
What is the server going to do when it receives the XML statements?