gistfile1.txt

def send_GET
  url = 'http://somewebservice.com/api?foo=bar'
  http = EventMachine::HttpRequest.new(URI url).get
  http.callback {
    operation = proc do
      parsed_json = JSON.parse(http.response)
      xml_response = convert_json_to_xml(parsed_json)
    end
    callback = proc do |r|
      send_data r
      close_connection_after_writing
    end
    EM.defer(operation, callback)
  }
end