Auto Spotify playlist torrenting system

spot_exp.rb

require 'net/http'
require 'json'
require 'nokogiri'

def http_req(url,limit=3)
  response = Net::HTTP.get_response(URI(url))
  case response
  when Net::HTTPSuccess then
    response.body
  else
    if limit > 0
      http_req(url,limit-1) 
    else
      raise HTTPError, response.code
    end
  end
end

# Note: This was purely added as an experimental feature to show what can be done using the data extracted from spotify.
# I do not condone pirating, nor do I encourage anyone to use this script for this, besides it is very buggy and was 
# only written for education purposes.
results = []
p "Downloading song info"
f = File.open("#{File.basename(ARGF.filename,".*")}.csv","w")
ARGF.read.split("\n").each do |l|
  unless l.include? "local"
    url =  "http://ws.spotify.com/lookup/1/.json?uri=#{l}" 
    response = http_req(url)
    parsed = JSON.parse(response)
    name = parsed["track"]["name"]
    artist = parsed["track"]["artists"].first["name"]
    album = parsed["track"]["album"]["name"]
    results << {:name => name, :artist => artist, :album => album}
    f.puts "#{name},#{artist},#{album}"
  end
end
p "Finding Torrents for Albums"
results.uniq! {|t| t[:album]}
f_mag = File.open("#{File.basename(ARGF.filename,".*")}.mag","w")
results.each do |track|
  url = URI.escape("http://thepiratebay.se/search/#{track[:artist]+" "+track[:album]}/0/7/0")
  response = Nokogiri::HTML(http_req(url))
  begin
    link = response.css("#searchResult > tr").css("td")[1].css("a")[1]['href']
    if !link.include? "magnet"
      p "Malformed HTML"
    else
      f_mag.puts link
    end
  rescue
    p "No links for "+track[:artist]+" "+track[:album]
  end
end

f_mag.close
f.close

Currently works using ruby 1.9. Accepts a file containing spotify uri and outputs two files, one a list of albums, artists and songs and two a list of magnet urls for all albums which exist on tpb.