feed_muncher.rb

#!/usr/bin/env ruby
#coding:utf-8

require "open-uri"
require "fileutils"

destination_path = ENV['RSS_DOWNLOAD_DESTINATION'] || File.expand_path('.')
feed_url = ENV['RSS_FEED']
feed_file = URI.parse(feed_url).open
feed_file.close

feed = File.read(feed_file.path)

file_regex = /((?:https:\/\/)(?:www)?[-a-zA-Z0-9@:%_\+.~#?\/=]+\.mp3)/

matches = feed.scan(file_regex)

matches.each { |url|
	path = url[0]
	uri = URI.parse(path)
	filename = File.basename(uri.path)
	destination = "#{destination_path}/#{filename}"

	puts "Downloading #{path}"
	STDOUT.flush

	tempfile = URI.parse(path).open
	tempfile.close

	FileUtils.mv tempfile.path, destination

	puts "Done. Saved to #{destination}"
	STDOUT.flush
}

A quick script to look for mp3 files in an RSS feed and download them to the same location as the script.

Don’t forget to first make the script executable by running chmod +x feed_muncher.rb.

The RSS feed can be provided via environment variable like:

RSS_FEED=https://domain.com/feed.rss ./feed_muncher.rb

If you want to change the destination folder, that can be provided via RSS_DOWNLOAD_DESTINATION.