#!/usr/bin/env ruby

require 'net/http'
require 'cgi'

host, path = 'en.wikipedia.org', '/w/api.php'
cgi = CGI.new
http = Net::HTTP.new(host)

req = Net::HTTP::Post.new(path)
req.set_form_data :action => 'login', :lgname => cgi['username'], :lgpassword => cgi['password']
res = http.start { |h| h.request(req) }

header = {
  'Cookie' => res['set-cookie'].scan(/enwiki.+?=.+?;/).join(' '),
  'User-Agent' => 'watchlist.rb script (http://mpov.wordpress.com/2007/02/19/wikipedia-watchlist-feed-v2/)'
}

res, body = http.get(path + '?action=feedwatchlist&feedformat=rss', header)

puts "content-type:text/xml\n\n"
puts body