railscasts_download_urls.rb

require 'rubygems'
require 'nokogiri'
require 'open-uri'

# script that will go over the railscasts website and create a list of
# all available videos. (can then be used to download using wget or
# something)

def has_downloads?(doc)
  doc.css(".content").each do |content|
    if content.text.include?("No episodes found. ")
      return false
    end
  end
  return true
end

def get_railscasts_page(page)
  url = "http://railscasts.com/episodes?page=#{page}"
  Nokogiri::HTML(open(url))
end

page = 1
begin
  doc = get_railscasts_page page
  doc.css(".download").each do |item|
    puts item.at_css("a").attribute("href")
  end
  page += 1
end until not has_downloads? doc