Pure ruby code posting form data with parameters, and get the response.

ruby_http_post.rb

require 'net/http'
require 'uri'

#1: Simple POST
res = Net::HTTP.post_form(URI.parse('http://www.example.com/search.cgi'),
                          {'q' => 'ruby', 'max' => '50'})
puts res.body

#2: POST with basic authentication
res = Net::HTTP.post_form(URI.parse('http://jack:pass@www.example.com/todo.cgi'),
                                    {'from' => '2005-01-01',
                                     'to' => '2005-03-31'})
puts res.body

#3: Detailed control
url = URI.parse('http://www.example.com/todo.cgi')
req = Net::HTTP::Post.new(url.path)
req.basic_auth 'jack', 'pass'
req.set_form_data({'from' => '2005-01-01', 'to' => '2005-03-31'}, ';')
res = Net::HTTP.new(url.host, url.port).start {|http| http.request(req) }
case res
when Net::HTTPSuccess, Net::HTTPRedirection
  # OK
else
  res.error!
end

#4: Multiple values
res = Net::HTTP.post_form(URI.parse('http://www.example.com/search.cgi'),
                          {'q' => ['ruby', 'perl'], 'max' => '50'})
puts res.body