gistfile1.rb

require 'uri'
require 'cgi'
require 'pp'

#url = "http://stackoverflow.com/questions/3927495/parsing-a-complex-url-in-ruby"
url = 'http:// this is clearly not a domain but https and www also .com is here'
valid = url.match /^(http|https):\/\/|[a-z0-9]+([\-\.]{1}[a-z0-9]+)*\.[a-z]{2,6}(:[0-9]{1,5})?(\/.*)?$/ix

if valid
  puts "Thats a domain "
  pp valid
else
  puts "I dont think that can be taken as a domain"
  
end