Download a mixcloud stream!

dl_mixcloud_cast.rb

#!/usr/bin/env ruby

require 'httparty'
require 'json'
require 'nokogiri'
require 'open-uri'

class Numeric
  def percent_of(n)
    self.to_f / n.to_f * 100.0
  end
end

user = ARGV[0] 

response = HTTParty.get("http://api.mixcloud.com/#{user}/cloudcasts/")
mixes = JSON.parse(response.body)

mixes["data"].each do |m|
  mix_url = m["key"]

  mix_response = HTTParty.get("http://api.mixcloud.com#{mix_url}")
  mix = JSON.parse(mix_response.body)

  url = mix["url"]
  mix_name = mix["name"]

  doc = Nokogiri::HTML(open(url))   
  preview_url = doc.css('//*[@id="player-play"]').first.attributes["data-preview-url"].value

  puts "Preview : #{preview_url}"

  stream_id = preview_url.scan(/previews([^\.]+)/)[0][0]
  stream_url = "/cloudcasts/m4a/64#{stream_id}.m4a"

  f = File.open("#{mix_name}.m4a", "wb")

  begin
    (15..30).each do |x|

      puts "Trying stream#{x}.mixcloud.com"
      
      Net::HTTP.start("stream#{x}.mixcloud.com") do |http|

        http.request_get(stream_url) do |resp|

          if resp.code != "404"  
            content_length = resp['Content-Length'].to_i
            done = 0

            puts "Writing to #{mix_name}.m4a (#{content_length} bytes)" 

            resp.read_body do |segment|
              f.write(segment)
              done = done + segment.length
              print "#{done} bytes - "
              print "%.2f%%" % done.percent_of(content_length)
              print 13.chr
            end

            puts "Done!"

            break
          end

        end
      end

      
    end
  ensure
    f.close
  end

end

Gemfile

source 'http://rubygems.org'

gem 'httparty'
gem 'nokogiri'