Here's some fun with monkey patching a class to see an XMLRPC response. I can't directly get at seeing what I'm going to send to an XMLRPC service with the XMLRPC::Client object itself. If I try to reach in and call 'create().methodCall', I'm told it's private. So, why not create a method where I can make a call and see what's going to happen, w…

response.txt

$ ruby xmlrpc-test.rb
"<?xml version=\"1.0\" ?><methodCall><methodName>command</methodName><params><param><value><struct><member><name>expr</name><value><array><data><value><string>2 * 3</string></value></data></array></value></member></struct></value></param></params></methodCall>\n"

xmlrpc-test.rb

#!/usr/bin/env ruby

require 'xmlrpc/client' # part of stdlib
require 'pp'

host    = "example.com"
path    = "/cgi-bin/service.cgi"
port    = 80
request = XMLRPC::Client.new(host, path, port)

module XMLRPC
  class Client
    def call2_dummy_load(method, *args)
      request = create().methodCall(method, *args)
    end
  end
end

begin
  response = request.call2_dummy_load('command', { 'expr' => [ "2 * 3" ] })
  
  pp response
rescue XMLRPC::FaultException => e
  puts "Error:"
  puts e.faultCode
  puts e.faultString
end