Get all fresh WWDC sessions at once

gimmeWWDC.rb

#!/usr/bin/env ruby

require 'net/http'
require 'json'
require 'ostruct'
require 'fileutils'

PATH = "https://devimages.apple.com.edgekey.net/wwdc-services/ftzj8e4h/6rsxhod7fvdtnjnmgsun/videos.json"
WWDC_DIR = "#{Dir.home}/Downloads/wwdc"

FileUtils.mkdir_p(WWDC_DIR) unless File.exists?(WWDC_DIR)

uri = URI(PATH)
json = Net::HTTP.get(uri)

sessions = JSON.parse(json)['sessions'].map { |x| OpenStruct.new(x) }

sessions.select {|x| x.year == 2015 }.each do |x|
  sessionURL = x.download_sd
  file = sessionURL.split('/').last

  next if Dir.entries(WWDC_DIR).include?(file)

  command = Thread.new do
    puts "Downloading session: #{x.title}"
    `curl #{sessionURL} --output #{WWDC_DIR}/#{file}`
    end
  command.join
end

A handy script, thanks for this one. Would be nice to know the total download size beforehand though. Just to be sure there's enough space to get them all.