coolio-sync.rb

# https://github.com/igrigorik/em-http-request/blob/master/examples/fibered-http.rb

require "pp"
require "rubygems"
require "eventmachine"
require "em-http"
require "fiber"

module Foo
  EM < ::EventMachine

  def http(&block)
    @count = 0
    EM.run do
      instance_eval(&block)
    end
  end

  def request(method, url, params={}, block)
    @count += 1
    Fiber.new do 
      f = Fiber.current
      con = EM::HttpRequest.new(url)
      http = con.__send__(method)
      http.callback { f.resume }
      http.errback{ f.resume }
      Fiber.yield

      block.call(http)
      @count -= 1
      EM.stop if @count == 0
    end.resume
  end

  %w!get post head put delete!.each do |method|
    instance_eval <<-RUBY
      def #{method}(url, params={}, &block)
        request(:#{method}, url, params, block)
      end
    RUBY
  end

  extend self
end

Foo.http do
  get("http://www.google.com/") do |http|
    pp http.response_header
  end

  get("http://www.google.com/search?q=test") do |http|
    pp http.response_header
  end

  get("http://www.yahoo.com/") do |http|
    pp http.response_header
  end

  %w!http://bing.com/ http://yandex.ru/!.each do |url|
    get(url) do |http|
      pp http.response_header
    end
  end
end

puts "done."