Get RSS feeds for iTunes Podcast links

itunes_to_rss.rb

# gem install httparty
# gem install nokogiri
# gem install feedjira

module ItunesToRSS
  def self.extract(url)
    headers = { 'User-Agent' => 'iTunes/10.1 (Windows; U; Microsoft Windows XP Home Edition Service Pack 2 (Build 2600)) DPI/96' }
    base_url = 'http://itunes.apple.com/podcast/'
    podcast_id = url.match(/id\d+/).to_s
    itunes_response = HTTParty.get("#{base_url+podcast_id}", headers: headers)

    if itunes_response.parsed_response.kind_of?(Hash)
      detail_url = URI.extract(itunes_response.as_json.to_s).first
      itunes_response = HTTParty.get(detail_url, headers: headers)
      doc = Nokogiri::HTML(itunes_response.parsed_response)
      feed_url = doc.css('button')[1].attributes['feed-url'].value
    else
      doc = Nokogiri::HTML(itunes_response.parsed_response)
      feed_url = doc.css('button')[1].attributes['feed-url'].value
    end
    puts url
    puts feed_url
    return feed_url
  end
end

# iTunes top 100 podcasts example
itunes_top100_url = 'https://itunes.apple.com/us/rss/toppodcasts/limit=100/explicit=true/xml'
top100 = Feedjira::Feed.fetch_and_parse itunes_top100_url
feeds = top100.entries.each do |entry|
  url = entry.url
  feed_url = ItunesToRSS.extract url
  return { name: entry.title, feed_url: feed_url }
end