gistfile1.txt

require 'sinatra'
require 'eventmachine'
require 'em-http-request'
require 'thin'


get '/' do
    r = EventMachine::HttpRequest.new('http://google.com').get

    r.callback do

      #
      # custom processing
      #

      content_type :html
      response.status = 200
      response.body= Array("hello")
      result = response.finish# m.responses.inspect.to_s
      request.env['async.callback'][ result ]
    end
    throw :async
end

give em-synchrony a try ;)