feeds/lib/tasks/feeds_tasks.rake

namespace :feeds_module do
  desc "Downloading feeds"
  task :make_cache,[:url] => :environment do |task,args|
    main_directory = File.join("#{Rails.root}","public","site_feeds")
    FileUtils.mkdir_p(main_directory) if !File.exists?(main_directory)
    SiteFeed.enabled.each do |site_feed|
      feed_directory = File.join(main_directory.to_s, site_feed.id.to_s)
      FileUtils.mkdir_p(feed_directory) if !File.exists?(feed_directory)
      uri = URI(site_feed.feed_url)
      res = Net::HTTP.start(uri.host, uri.port,:use_ssl => uri.scheme == 'https',open_timeout: 60,read_timeout: 60) do |http|
        req = Net::HTTP::Get.new(uri)
        http.request(req).body rescue ''
      end
      File.open(File.join(feed_directory.to_s,site_feed.feed_uid + ".json"),"w") do |file|
        res.force_encoding("utf-8")
        file.write(res)
      end
      site_feed.save
    end
  end 
end