fetch_asciicast_with_auth

fetch_asciicast_with_auth.rb

#!/usr/bin/env ruby
##encoding:utf-8
 
require 'open-uri'
require 'nokogiri'
require 'stringio'
require 'watir-webdriver'

def generate_cast_url(link)
  link + "?view=asciicast"
end

def generate_file_name(cast_url)
  cast_url.slice(/\/\d+.*\?/).gsub(/[\/\?]/,'') + '.html'
end
  
# login github with your name and password
user_name = "name"
password = "password"

# change the browser type with your own
# btw: you should out of the wall if you are in c h i n a
browser = Watir::Browser.new :firefox
browser.goto "http://railscasts.com/login"
browser.text_field(name: 'login').set(user_name)
browser.text_field(name: 'password').set(password)
browser.button(name: 'commit').click

rss_url = 'http://railscasts.com/subscriptions/WbnCA6UR0xak0TrMUSaGQg/episodes.rss'
rss_doc = Nokogiri::XML(open(rss_url))

rss_doc.css('item link').each do |link|
  cast_url = generate_cast_url(link.text)
  file_name = generate_file_name(cast_url)

  browser.goto cast_url
  cast_html = Nokogiri::HTML(browser.html) 
  ascii_content = cast_html.css('.asciicast').inner_html()

  File.open(file_name, "w") do |file|
    file.puts ascii_content
  end
end 

browser.close