require 'open-uri' open('http://www.example.com/', { :method => :post, :body => 'a=123&b=456', 'User-Agent' => 'Mozilla/5.0 (Windows; U; Windows NT 5.1; ja; rv:1.8.1.12) Gecko/20080201 Firefox/2.0.0.12', 'Accept' => 'text/xml,application/x…