sftp from behind firewall via HTTP proxy in Ruby

Same as the previous Post using ruby:

require 'rubygems'
require 'net/ssh'
require 'net/sftp'
require 'net/ssh/proxy/http'

base_dir = "/some_base_directory"

proxy_host = 'IP_or_FQDN_of_your_proxy'
proxy_port = port_of_your_proxy

proxy = Net::SSH::Proxy::HTTP.new(proxy_host,proxy_port)

Net::SSH.start('destination_IP_or_FQDN','username',
                {:proxy         => proxy,
                 :password      => 'password'}) do |ssh|

        ssh.sftp.connect do |sftp|
                # do something
        end
end