gistfile1.rb

require 'nokogiri'

class Page

  attr_accessor :html

  include EM::Deferrable
  def initialize(url_as_a_hash)
    client = EM::Protocols::HttpClient.request(url_as_a_hash)
    @html = nil
    client.callback do |response|
      self.html = response[:content]
      self.succeed
    end
    client.errback { self.fail }
  end

  def links
    Nokogiri::HTML(html) / 'a'
  end

end