Linux, Mac, Ruby, Rails, JS, AJAX, DB, Server => WEB2.0

Its in Ruby of course and requires simple Hpricot gem.

If you not having it. Just type this command in your terminal –

–Rest include this script in your /lib folder

–Change the path in the script where you want to download all the screencasts

–Go to your projects development environment (script/console) and run the script by these commands–

video = Railscasts.new #new Railscasts object

video.start #will start downloading all screencasts from Railscasts

1. If you stop the script in between manually, it will not download those screencasts that are already in your hard disk.
2. All logs are maintained in Railsproject/log/railscasts.log.
3. Handling all exceptions raised

Improvements/Suggestions  are appreciated.

Thanks

And yes script:

# Author : Akshay Gupta
#file: railscasts.rb
# First check you have all gems installed. Place the script in /lib folder and run the script.
# I don't have expertize in ruby, please tell how it can be improved.
# change the path accordingly, where you want to save path
# My working env is on MacOS, one need to make some changes if running on Windows

require 'rubygems'
require 'hpricot'
require 'open-uri'
require 'logger'
$log = Logger.new('log/railscasts.log')
$path = "/Users/akshaygupta/railsvideo/railscasts/"
$stop = false

class Railscasts
attr_accessor :url

def initialize
  @@page = 1
  @@url  = "http://railscasts.com/episodes?page="
  start
end

def url
  @url = @@url+@@page.to_s
end

def start
  url
  build_doc
  screencasts_links
  download_screencasts
  next_page
  if !$stop
    start
  else
    puts "Successfully done   Enjy all the screencasts"
  end
end

def build_doc
  begin
    $log.info("*********Fetching #{@url}***********")
    @doc = Hpricot(open(@url))
  rescue Exception => e
    $log.debug("Problem fetching #{e}")
  end
end

def screencasts_links
  begin
    @download_links =
      (@doc/".download/a[1]").collect {|a| (a.search("[@href]").first[:href])}
    $log.info(" All Download links on this page :\n #{@download_links}")
  rescue
    $log.info("Problem in download links")
  end
end

def download_screencasts
  @download_links.each do |mov|
    begin
      file = mov.split('/').last
      res = `cd #{$path}; ls | grep "#{file}"`
      if !res
        $log.info("Now downloading file #{file}")
        result = `cd #{$path}; wget "#{mov}"`
        if result
          $log.info("Successfully Downloaded #{file}")
        end
      else
        $log.info("Already downloaded #{file}")
      end
    rescue Exception => e
      $log.info("problem downloding file #{e}")
    end
  end
end

  def next_page
    if @@page < 17
      @@page += 1
    else
      $log.info("All screencasts downloaded  , Mission accomplished!!")
      $stop = true
    end
  end
end