feed_parser.rb

require 'net/http'
require 'nokogiri'
require 'json'

class FeedParser

  attr_accessor :url

  def initialize url
    @url = url
  end

  def parse
    parser.xpath("//item").map do |item|
      title = "#{item.xpath('title').first.inner_text}"
      url = "#{item.xpath('enclosure').first.attribute('url')}"
      { title: title, url: url }
    end.to_json
  end

  def self.parse(url)
    new(url).parse
  end

  private

  def parser
    Nokogiri::XML.parse(get)
  end

  def get
    Net::HTTP.get_response(uri).body
  end

  def uri
    URI(url)
  end

end