require 'nokogiri'
require 'net/http'
require 'open-uri'

def fetch(uri_str, limit = 10)
  raise ArgumentError, 'too many HTTP redirects' if limit == 0
  response = Net::HTTP.get_response(URI(uri_str))

  case response
    when Net::HTTPSuccess then
      response.body
    when Net::HTTPRedirection then
      location = response['location']
      warn "redirected to #{location}"
      fetch(location, limit - 1)
    else
      response.value
  end
end


resp = fetch('сайт')
Nokogiri::HTML.parse(resp)