URL Response Code Checker - Ruby Script

url_response_checker.rb

require "net/http"
require "csv"

def response_code_for_url(url)
  begin
    url = URI.parse(url)
    req = Net::HTTP.new(url.host, url.port)
    res = req.request_head(url.path)
    
    if res.code == '301'
      response_code_for_url(res['location'])
    else
      res.code
    end
    
  rescue URI::InvalidURIError
    '500'
  end
end

ok, redirect, error = 0, 0, 0

CSV.foreach("urls_to_check.csv") do |row|
  url = row[0]
  code = response_code_for_url(url)
  case code
  when '200'
    ok += 1
  when '301'
    redirect += 1
  else
    error += 1
    puts "#{code}: for url #{url}"
  end
end

puts "#{ok}: pages found"
puts "#{redirect}: pages redirected"
puts "#{error}: pages in error"