Validate path in ruby via net/http HEAD request

pry20121127-19642-1arghpy.rb

require 'net/http'
require 'uri'

def valid_path?(path, allowed_redirects=5)
  allowed_redirects.times do
    url = URI.parse(path)
    response = Net::HTTP.new(url.host, url.port).request_head(url.path)

    if response.kind_of?(Net::HTTPRedirection)
      path = response['location']
    else
      return response.kind_of?(Net::HTTPSuccess)
    end
  end

  false
end