blofeld.rb

require 'bundler/inline'

gemfile do
  source 'https://rubygems.org'
  gem 'nokogiri'
  gem 'playlist'
end

require 'open-uri'
require 'uri'
require 'cgi'
require 'optparse'

module Playlist::Format::M3U
  class << self
    def generate(playlist)
      text = "#EXTM3U\n"
      playlist.tracks.each do |t|
        duration = (t.duration.to_i / 1000).round
        text += "#EXTINF:#{duration},#{t.creator} - #{t.title}\n"
        text += "#{t.location}\n"
      end
      text
    end
  end
end

options = {}
OptionParser.new do |opts|
  opts.banner = "Usage: blofeld.rb [options]"

  opts.on("-d", "--dry-run", "Print all the shows' urls to STDOUT") do |d|
    options[:dryrun] = d
  end
  opts.on("-r", "--reverse", "Return latest shows first") do |r|
    options[:reverse] = r
  end
end.parse!

directory_url = 'http://archives.bassdrivearchive.com/1%20-%20Monday/The%20Prague%20Connection%20-%20Blofeld/'.freeze
playlist = Playlist.new(title: "The Prague Connection - Blofeld")
title = ->(href) { CGI.unescape(href).sub('.mp3','') }
full_url = ->(href) { URI.join(directory_url, href) }

Nokogiri::HTML(URI(directory_url).open)
  .xpath('//table/tr/td/a')
  .map(&:attributes)
  .map(&->(x) {x["href"]})
  .map(&:value)
  .select { |href| href =~ /.*\.mp3$/ }
  .yield_self { |_| options[:reverse] ? _.reverse : _ }
  .each { |href| playlist.add_track(creator: 'Blofeld', title: title.(href), location: full_url.(href), duration: 0); href }
  .map { |href| full_url.(href) }
  .yield_self { |_| puts *_ if options[:dryrun] }

File.open("blofeld.m3u", "wb") do |file|
  file.write Playlist::Format::M3U.generate(playlist)
end unless options[:dryrun]

Usage

1. Download & run: ruby blofeld.rb | pbcopy
2. Alternatively run this trusted script straight outta internetz: curl -s https://gist.githubusercontent.com/fidel/11e08df4b48a181ecabc3d7e1ed8170b/raw/blofeld.rb | ruby | pbcopy
3. Paste list to your favourite player, eg. VOX on Mac via cmd+u