FB streetcar prediction fetching code

gistfile1.rb

require 'net/http'
require 'rexml/document'

lastindex = 0
stops = [
         {:route=>"506", :stop=>"8999"},
         {:route=>"505", :stop=>"2954"},
         {:route=>"506", :stop=>"5094"},
         {:route=>"504", :stop=>"14808"},
         {:route=>"504", :stop=>"9383"}
]

SCHEDULER.every '10s' do
    base_uri = "http://webservices.nextbus.com/service/publicXMLFeed"
    params = {
              :a => 'ttc',
              :command => 'predictions',
              :s => stops[lastindex][:stop],
              :r => stops[lastindex][:route]
             }
    lastindex += 1
    lastindex = 0 if lastindex == stops.length
    begin
        uri = URI(base_uri)
        uri.query = URI.encode_www_form(params)
        resp = Net::HTTP.get_response(uri)
        xml_data = resp.body
        doc = REXML::Document.new(xml_data)
        root = doc.root
        route = root.elements["predictions"].attributes['routeTitle']
        direction = root.elements["predictions/direction"].attributes['title']
        dir_exp = /^(.*)\s\-/
        match = dir_exp.match(direction)
        direction = match[1] unless match.nil?
        times = []
        root.elements["predictions/direction"].elements.each do |ele|
            seconds = ele.attributes['seconds'].to_i
            time_str = Time.at(seconds).gmtime.strftime('%M:%S')
            times << {:time => time_str }
        end
    rescue Timeout::Error, Errno::EINVAL, Errno::ECONNRESET, EOFError,
       Net::HTTPBadResponse, Net::HTTPHeaderSyntaxError, Net::ProtocolError => e
       route = "halp!"
       direction = "Something went wrong"
       times = [0,0,0]
       puts e
       return
    end
    send_event('streetcar', {title:route, moreinfo:direction, items:times[0,3]})

end