sxsw_feed.rb

#!/usr/bin/env ruby

require 'cgi'
require 'rubygems'
require 'hpricot'
require 'open-uri'

class SXSWPodcast
  attr_reader :title, :description, :date, :link
  
  def initialize(title, description, date, link)
    @title = title
    @description = description
    @date = Time.parse( date )
    @link = link
  end
end

doc = Hpricot( open( "http://sxsw.com/taxonomy/term/44" ) )

nodes = doc.search( ".node" )

podcasts = nodes.map do |node|
  title = node.at( "h2.title" ).inner_text.strip
  description = node.at( ".content p" ).inner_text.strip
  date = node.at( ".submitted .date" ).inner_text.strip
  link = node.at( ".content p:last-child a" )[:href]
  SXSWPodcast.new(title, description, date, link)
end

require 'rss/maker'

feed = RSS::Rss.new("2.0")

channel = RSS::Rss::Channel.new
channel.title = "SXSW"
channel.link = "http://sxsw.com/taxonomy/term/44"
channel.description = "SXSW podcasts, courtesy of sourcetagsandcodes.com"

podcasts.each do |podcast|
  item = RSS::Rss::Channel::Item.new
  item.title = podcast.title
  item.description = podcast.description
  item.link = podcast.link
  
  size = 0 # unknown
  type = 'audio/mpeg'
  enclosure = RSS::Rss::Channel::Item::Enclosure.new( podcast.link, size, type )
  item.enclosure = enclosure
  
  item.date = podcast.date
  channel.items << item
end

feed.channel = channel

cgi = CGI.new

puts "Content-type: text/xml"
puts ""
puts feed