superfeedr2-growl.rb

require 'rubygems'
require 'sinatra'
require 'atom'
require 'ruby-growl'

g = Growl.new "localhost", "Superfeedr", ["Superfeedr Notification"]
g.notify "Superfeedr Notification", "We're connected!",
         "You should soon see notifications coming over."

##
# When checking subscription. See Section 6.2 of PubSubHubbub Spec.
get '/' do
  # We confirm all subscriptions... Ideally in a "real-world" case, you'd want to make sure you actually want to receive notification for the hub.topic feed :)
  status 200
  params["hub.challenge"]    
end

##
# Upon new Notification, just parse the ATOM and use the resul in your app. In this case, we just send a Growl Notification
# Make sure you allowed "Network notification" in thr growl settings.
post '/' do
  feed = Atom::Feed.new(request.body.string)
  feed.entries.each { |entry|
    g.notify "Superfeedr Notification", "#{entry.title}", "#{entry.content.value}"
  }
  status 204
  "Thanks!"
end