Download Last.fm user's loved tracks from VK.com

download.rb

# encoding: utf-8

require 'pp'
require 'open-uri'
require 'mechanize'
require 'lastfm'
require 'vkontakte'

### Last.fm credentials
#
lastfm_username   = 'xxx'
lastfm_password   = 'xxx'
lastfm_api_key    = 'xxxxxxxxxxx'
lastfm_api_secret = 'xxxxxxxx'

### Vk.com credentials
#
vk_email = 'username@example.com'
vk_password  = 'xxx'
vk_client_id = 'xxxxx'

downloaded_folder = 'audio'

### Log in to Last.fm
#
mech = Mechanize.new do |a|
  a.user_agent_alias = 'Linux Firefox'
  a.verify_mode = OpenSSL::SSL::VERIFY_NONE
  a.follow_meta_refresh = true
end

login_page = mech.get('https://last.fm/login')
login_form = login_page.form_with(action: '/login')

login_form.username = lastfm_username
login_form.password = lastfm_password

page = login_form.submit

if page.uri.to_s == 'http://www.last.fm/home'
  puts "Login successful!"
elsif page.uri.to_s == 'https://www.last.fm/login'
  puts "That doesn't seem right."
  exit
else
  puts page.uri.to_s
  exit
end

###
#
lastfm = Lastfm.new(lastfm_api_key, lastfm_api_secret)
lastfm_token = lastfm.auth.get_token

# open 'http://www.last.fm/api/auth/?api_key=xxxxxxxxxxx&token=xxxxxxxx' and grant the application
#
grantaccess_url = "http://www.last.fm/api/auth/?api_key=#{lastfm_api_key}&token=#{lastfm_token}"

grantaccess_page = mech.get(grantaccess_url)

grantaccess_form = grantaccess_page.form_with(action: '/api/grantaccess')
grantaccess_form.submit

lastfm.session = lastfm.auth.get_session(:token => lastfm_token)['key']

tracks = lastfm.user.get_loved_tracks(user: lastfm_username, limit: 10)

# Log in in to Vkontakte
#
vk = Vkontakte::Client.new(vk_client_id)
vk.login!(vk_email, vk_password, scope = 'audio')

audios = []
tracks.each do |track|
  str = "#{track['artist']['name']} - #{track['name']}"
  # Повертає найпопулярніший результат пошуку строки str(серед аудіозаписів)
  audio = vk.api.audio_search(q: str, sort: 2)[1]
  audios << audio
end
  
### Save files to disk
#
audios.each do |audio|
  path = "#{downloaded_folder}/" + "#{audio['artist']} - #{audio['title']}.mp3".tr("/\000", "")
  unless File.exists?(File.absolute_path(path))
    print "Download #{audio['artist']} - #{audio['title']}"
    File.open(path, 'wb') do |saved_file|
      open(audio['url'], 'rb') do |read_file|
        saved_file.write(read_file.read)
      end
    end
    puts " - Done."
  end
end