How to set proxy while using savon?

[Magudamudi]

Hi,
While using http we can set the proxy like this

Net::HTTP::Proxy('10.199.99.99',3333,'username','password').start(url.host,url.port)

When I'm trying to use Savon how to set the proxy?

My code is

 require 'savon'
    client = Savon::Client.new do |wsdl,http|
      wsdl.document = "http://www.webservicex.com/CurrencyConvertor.asmx?wsdl"
    end
    client.wsse.credentials "username", "password"
    response = client.request :conversion_rate do
      soap.body = {
        :from_currency => 'USD',
        :to_currency => 'EUR'
      }
    end
    puts response.to_hash;
    render :text => response.to_hash.to_s

Please help me to set the proxy while using Savon in Ruby on Rails...

Thanks in Advance!