[Ruby] Async HTTP request with Faraday and EM

ruby_async_http.rb

require 'em-http-request'
require 'faraday'
conn = Faraday.new "http://httpbin.org" do |con|
  con.adapter :em_http
end
r = conn.get '/ip'
p r.finished? #For checking completion
#Run on completion
r.on_complete{ 
  p r.body 
}