> Use tcpdump, wireshark, or a similar tool. Er... it's not me wanting the xml stream, maybe I didn't make it clear enough... my customer (the one who pays me) asked me a java test suite (not a *nix script) to produce that kind of output.
Besides, I suspect that the xmlrpc library uses some kind of OutputStream to send the xml request, and I would be disappointed if the API gave no opportunity to change that stream. However now I'm going to suggest my customer to use tcpdump, I hope he's in a good mood...