问如何在使用Ruby重定向后获得最终的URL？

EN

require 'httpclient'
require 'open-uri'

URL = 'http://www.example.org'

httpc = HTTPClient.new
resp = httpc.get(URL)
puts resp.header['Location']
>> http://www.iana.org/domains/example/

open(URL) do |resp|
  puts resp.base_uri.to_s
end
>> http://www.iana.org/domains/example/

def get_redirected_url(your_url)
  result = Curl::Easy.perform(your_url) do |curl|
    curl.follow_location = true
  end
  result.last_effective_url
end 

def get_final_url (url)
    final_url = ""
    until url.nil? do
      final_url = url
      url = Net::HTTP.get_response(URI.parse(url))['location']
    end

    final_url
  end