gistfile1.rb

require 'rubygems'
require 'sinatra'
require 'atom'
require 'xmlrpc/client'
require 'uri'

# Make sure our template can use <%=h
helpers do
  include Rack::Utils
  alias_method :h, :escape_html
end 

## 
# Subscription verification 
get '/' do 
  if params["hub.challenge"] 
    params["hub.challenge"] 
  else 
    "This is awesome." 
  end 
end 

## 
# Notification 
post '/' do 
  # Parsing the Atom from the notification 
  feed = Atom::Feed.new(request.body.read) 
  uri = URI.parse(params["endpoint"]) 
  uri.user = params["login"] 
  uri.password = params["password"] 
  
  server = XMLRPC::Client.new2(uri.to_s)
  
  feed.entries.each do |e| 
    newPost = Hash.new 
    newPost['title'] = e.title.to_s
    newPost['description'] = (e.content ? e.content.value.to_s : e.summary.to_s) 
    newPost['dateCreated'] = e.published 
    newPost['categories'] = e.categories.map { |c| c.term.to_s  } 
    
    # Posting to the blog 
    server.call("metaWeblog.newPost", params["blog_id"], params["login"], params["password"], newPost, true) 
  end 
  "OK" 
end