# File lib/patron/session.rb, line 158
    def post(url, data, headers = {})
      if data.is_a?(Hash)
        data = data.map {|k,v| urlencode(k.to_s) + '=' + urlencode(v.to_s) }.join('&')
        headers['Content-Type'] = 'application/x-www-form-urlencoded'
      end
      request(:post, url, headers, :data => data)
    end