delta.rb

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

# Get the video title from each of the Delta Tube videos, if they exist.

(1..5000).each do |id|
  url = URI.parse("http://www.delta-tube.com/video/#{id}")
  req = Net::HTTP.new(url.host, url.port)
  res = req.request_head(url.path)

  if res.code == 200
    get_title(id,url)
  else
    # Go to the next `id` and do it all again.
  end
end

def get_title(id,url)
  puts id + "," + Nokogiri::HTML(open(url)).xpath('//*[@id="mainContent"]/div[1]/div/h1').to_s
end