Downloading NPR "First Listen" albums

capture.rb

require 'nokogiri'
require 'open-uri'

# for url - http://ask.metafilter.com/187877/How-to-download-audio-from-NPR-stream
url = 'http://api.npr.org/query?id=1039&fields=titles,audio,show&sort=assigned&apiKey=MDAzMzQ2MjAyMDEyMzk4MTU1MDg3ZmM3MQ010'
doc = Nokogiri::XML(open(url))

doc.xpath('//mp3').each do |file|
  url = file.text.strip
  if url.include?("/fl/") && url.include?('.mp3') # Is it a "first listen" mp3?
    filename = URI(url).path.split('/').last
    `curl -o #{filename} #{url}`
  end
end