gistfile1.txt

require 'rubygems'
require 'em-http'
require 'time'

#"{\"modified\":1282228860,\"etag\":\"NaTRM8p2KwPYAS3C82mbgEwF2QA\",\"period\":43200,\"entries_count\":0,\"url\":\"http://shannoncarlson.tumblr.com/rss\",\"last_maintenance_at\":1282229793}"

EventMachine.run {
    http = EventMachine::HttpRequest.new('http://shannoncarlson.tumblr.com/rss').get :timeout => 10, :head => {'If-None-Match' => "NaTRM8p2KwPYAS3C82mbgEwF2QA", 'If-Modified-Since' => Time.at(1282228860).httpdate}, :redirects => 5

    http.callback {
      p http.response_header.status
      p http.response_header
      p http.response

      EventMachine.stop
    }
  }