Hubot Soundcloud Play

download.rb

require 'sinatra'
require 'json'
require 'net/http'
require 'open-uri'
require 'taglib'

get '/download/:url' do
  client_id = "your client id here"
  
  #pass in the url to the song and resolve it to get the song ID
  url = "http://api.soundcloud.com/resolve.json?url=#{params[:url]}&client_id=#{client_id}"
  resp = Net::HTTP.get_response(URI.parse(url))
  data = resp.body
  result = JSON.parse(data)
  if result.has_key? 'Error'
     raise "web service error"
  end
  
  #take the location and get the real song info
  resp2 = Net::HTTP.get_response(URI.parse(result["location"]))
  data2 = resp2.body
  song_info = JSON.parse(data2)
  if song_info.has_key? 'Error'
     raise "web service error"
  end
  
  if song_info["downloadable"] == "true"
    #follow the stram url and the redirect to the amazon asset
    URL = "#{song_info["download_url"]}?client_id=#{client_id}"
    open(URL) do |resp|
      dl = resp.base_uri.to_s
      filename = "/Path/to/save/location/#{song_info["permalink"]}.mp3"
      open(filename, 'wb') do |file|
        file << open(dl).read #save the file from amazon to computer
      end
      #open the file and add id3 tags
      file = TagLib::MPEG::File.new(filename)
      tag = file.id3v2_tag
      tag.artist = artist = song_info["user"]["username"] #set the song artist
      tag.title = song_info["title"] #set the song title
      file.save
      file.close
      "file download complete"
    end
  else
    "file not available for download"
  end
  
end