BannerGrab [Ruby]

require 'socket'

Gem.win_platform? ? (system "cls") : (system "clear")
puts "
 ____                               _____           _
|  _ \\                             / ____|         | |
| |_) | __ _ _ __  _ __   ___ _ __| |  __ _ __ __ _| |__
|  _ < / _` | '_ \\| '_ \\ / _ \\ '__| | |_ | '__/ _` | '_ \\
| |_) | (_| | | | | | | |  __/ |  | |__| | | | (_| | |_) |
|____/ \\__,_|_| |_|_| |_|\\___|_|   \\_____|_|  \\__,_|_.__/ ~ by AnonGuy" # [ blog.lolwaleet.com ] -- [ an0nguy @ protonmail.ch ]
print "\nURL -- > "

url       = gets.chomp.chomp('/').sub(/^https?\:\/\/(www.)?/, '')
separator = '-----------------------------------------------------------------------'
counter   = 0

puts separator
begin
    Socket.gethostbyname(url)
rescue SocketError
        abort("Error! -- Can't find #{url}!\n#{separator}")
end
sckt = TCPSocket.open(url, 80)
sckt.puts "HEAD / HTTP/1.1"
sckt.puts "Host: #{url}"
sckt.puts "User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:40.0) Gecko/20100101 Firefox/40.0"
sckt.puts "Connection: close\n\n"
headers = sckt.recv(500).rstrip
sckt.close
puts headers
puts separator
array = {'Server' => '[!] Server header found!', 'X-Generator' => '[!] X-Generator header found!', 'X-Powered-By' => '[!] X-Powered-By header found!', 'zope3' => '[!] Zope framework in use!', 'CAKEPHP' => '[!] CakePHP framework in use!', 'kohanasession' => '[!] Kohana framework in use!', 'X-AspNet-Version' => '[!] ASP.NET framework in use!', 'laravel_session' => '[!] Laravel framework in use!', '__cfduid' => '[!] Site is behind CloudFlare!', 'ns_af' => '[!] Site is behind Citrix Netscaler WAF!', 'Joomla' => '[!] Site is using Joomla!', 'Drupal' => '[!] Site is using Drupal!', 'X-Pingback' => '[!] Site is running Wordpress!'}
array.each_pair do |key, description|
    if headers.include?(key)
        counter += 1
        puts "#{counter} -- #{description}"
    end
end
print separator