[Web Scraping/Crawling] Calling redirect URL if 301/302 HTTP Status Code

web.rb

# Concrete case: Google search result URLs
#
# Requirement:
# gem install nokogiri

require 'nokogiri'
require 'net/http'
require 'uri'

def get(url)
  uri = URI.parse(URI.escape(url))
  response = Net::HTTP.get_response(uri) # get Headers + Body

  if ['301', '302'].include? response.code # check if redirection is needed via HTTP Status Code
    redirect_url = response['Location'] # Redirection URL set in 'Location' Header
    uri = URI.parse(URI.escape(redirect_url))
    Nokogiri::HTML(Net::HTTP.get(uri)) # Get Body of redirection URL
  else
    Nokogiri::HTML(response.body) # Save a call by using the already downloaded response. 
  end
end