A simple RSS Reader and Podcatcher

jrobertson (James Robertson) — Mon, 29 Oct 2007 23:28:18 GMT

Written in Ruby this class reads an RSS feed and downloads the latest enclosure if it exists.



require 'rss/1.0'

require 'rss/2.0'

require 'open-uri'

require 'open-uri'



class Rssreader

  def initialize(url)

    source = url # url or local file

    content = "" # raw content of rss feed will be loaded here

    open(source) do |s| content = s.read end

    @rss = RSS::Parser.parse(content, false)

  end



  # returns the first 3 titles from the rss feed

  def get_summary()

    buffer = '['

    for i in 0..2

      buffer += @rss.items[i.to_i].title + ' | '

    end      

    buffer.slice(0,buffer.length-3) + ']'

  end



  def enclosure?

    @rss.items.to_s.scan(' 0

  end



  def get_enclosure_url

    enclosure = @rss.items[0].enclosure

    enclosure.url

  end



  def rwget(url, filename)

    file = File.new(filename, 'w')

    file.puts open(url, 'User-Agent' => 'Ruby-wget').read

  end



  def download_enclosure()

    if self.enclosure? then

      enclosure_url = self.get_enclosure_url()

      local_filename = File.basename(enclosure_url)

      #puts local_filename

      if not File.exist?(local_filename) then

        puts 'downloading enclosure ...'

        self.rwget(enclosure_url, local_filename)

        puts 'download completed'

      else

        puts 'enclosure downloaded already'

      end

    end

  end    

end



if __FILE__ == $0

  url = "http://mysite.com/gwd/feed/lugradio.rss"

  rss = Rssreader.new(url)

  puts rss.get_summary()

  rss.download_enclosure()

end

DZone Snippets: podcatcher code

A simple RSS Reader and Podcatcher