Turn a SoundCloud playlist (set) into RSS

scplaylist2rss.rb

#!/usr/bin/env ruby
require 'soundcloud'
require 'builder'
require 'pp'
require 'csv'

# You'll need a sc api key
client_id = ENV['SC_CLIENT_ID']
client = SoundCloud.new(client_id: client_id)

# Which sound cloud set path?
# e.g. set_id = '/playlists/12345678'
set_id = ENV['SC_PLAYLIST_PATH'] || ''


# What will be the final public url for this feed
# e.g. feed_url = 'https://somestation.fm/feeds/myfeed-rss.xml'
feed_url = ENV['FEED_URL'] || ''


playlist = client.get(set_id)
target = ""
xml = Builder::XmlMarkup.new(indent: 2, target: target)

xml.instruct! :xml, version: '1.0'
xml.rss 'xmlns:atom' => 'http://www.w3.org/2005/Atom',
        'xmlns:itunes' => 'http://www.itunes.com/dtds/podcast-1.0.dtd',
        'xmlns:media' => 'http://search.yahoo.com/mrss/',
        'version' => '2.0' do
  xml.channel do
    xml.title playlist['title']
    xml.link playlist['permalink_url']
    xml.pubDate Time.now.utc.rfc2822
    xml.lastBuildDate Time.now.utc.rfc2822
    xml.ttl 60
    xml.language 'en-us'
    xml.description playlist['description']

    tags = CSV.parse_line(playlist['tag_list'], col_sep: " ")
    tags.each do |category|
      xml.category category
    end

    xml.generator 'SoundCloud Playlist to RSS 1.0'
    xml.docs 'http://blogs.law.harvard.edu/tech/rss'

    xml.image do
      xml.url playlist['artwork_url']
      xml.title playlist['title']
      xml.link playlist['permalink_url']
    end

    xml.atom :link, href: feed_url, rel: 'self', type: 'application/rss+xml'

    xml.itunes :author, playlist['user']['username']

    xml.itunes :image, href: playlist['artwork_url']
    xml.itunes :explicit, 'clean'

    xml.itunes :owner do
      xml.itunes :name, playlist['user']['username']
    end

    xml.itunes :subtitle, playlist['title']
    xml.itunes(:summary) { xml.cdata!(playlist['description']) }

    xml.media :copyright, "copyright #{playlist['user']['username']}, #{playlist['license'].gsub('-', ' ')}"
    xml.media :thumbnail, url: playlist['artwork_url']

    playlist['tracks'].each_with_index do |ep, index|
      xml.item do
        xml.guid(ep['uri'], isPermaLink: false)
        xml.title(ep['title'])
        xml.pubDate Time.parse(ep['last_modified'] || ep['created_at']).utc.rfc2822
        xml.link ep['permalink_url']
        xml.description { xml.cdata!(ep['description'] || '') }
        xml.enclosure url: ep['stream_url'] + "?client_id=#{client_id}", type: 'audio/mpeg', length: ep['original_content_size']
      end
    end
  end
end

puts target