[WI-FI shield] call SOAP service

Using Arduino Networking, Protocols, and Devices
1

I need to call a SOAP service from arduino due with wifi shield plugged on. There's some libraries ready to use or i need to write full XML request and put it inside HTML packet ( how? )?
Service it's very simple, just take only two string and return 1 after receive data.

2

There's some libraries ready to use

Not that I've ever heard of.

3

so how can i do to send a soap request?