Reactor Multi

reactor_multi.rb

require 'goliath'

require 'em-synchrony'
require 'em-synchrony/em-http'

require 'nokogiri'

class ReactorMulti < Goliath::API

  def response(env)

    sites = {
      :breakfast => "http://www.breakfastsaltlakecity.com/",
      :coupons   => "http://www.coupons.com/"
    }

    # Headers for coupons.com
    headers = {"user-agent" => "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_3) AppleWebKit/535.19 (KHTML, like Gecko) Chrome/18.0.1025.168 Safari/535.19"}

    multi = EventMachine::Synchrony::Multi.new

    sites.each do |key, site|
      multi.add key, EM::HttpRequest.new(site).aget(:head => headers)
    end

    multi.perform

    coupon    = Nokogiri::HTML(multi.responses[:callback][:coupons].response)
    breakfast = Nokogiri::HTML(multi.responses[:callback][:breakfast].response)

    coupon_chunk = coupon.at_css('.pod')
    breakfast.at_css(".sidebar").add_child(coupon_chunk)

    [200, {}, breakfast.to_html]
  end

end