music.rb

#!/usr/bin/env ruby
require 'nokogiri'

if ARGV.size < 2
  abort "Usage:\n\n  #{$0} VK_MUSIC_PAGE.HTML TARGET_PATH"
end

doc = Nokogiri::HTML::Document.parse(File.read(ARGV[0]))
target = ARGV[1]

doc.css('.audio').each do |audio|
  input = audio.css('input').first
  next unless input
  link = input['value'].sub(/\?.*/, '')

  title_wrap = audio.css('.info .title_wrap')
  author_a, title_tag = title_wrap.css('a')

  if title_tag.nil?
    title_tag = title_wrap.css('span').first
  end

  author = author_a ? author_a.inner_text : 'Unknown'
  title = title_tag ? title_tag.inner_text : 'Unknown'

  [author, title].each do |s|
    s.gsub!(/[^A-Za-zА-ЯёЁа-я\d\-\s]/, '')
    s.strip!
  end

  name = "#{author} - #{title}.mp3"
  path = File.join(target, name)

  puts "wget '#{link}' -O '#{path}'"
end