How to send Twilio SMS.rb

require 'twiliolib'
require 'rexml/document'

class MessagesController < ApplicationController

  TWILIO_API_VERSION = '2008-08-01'
  TWILIO_ACCOUNT_SID = 'ACxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'
  TWILIO_ACCOUNT_TOKEN = 'xxxxxxxxxxxxxxxxxxxxxxxxxx'

  def create
    @message = Message.new(params[:message])

    # TODO push Twilio logic into Message, or some other helper
    account = Twilio::RestAccount.new(TWILIO_ACCOUNT_SID, TWILIO_ACCOUNT_TOKEN)

    message_data = {
      'From' => @message.From,
      'To' => @message.To,
      'Body' => @message.Body
    }
    twilio_response = account.request("/#{API_VERSION}/Accounts/#{TWILIO_SID}/SMS/Messages", 'POST', message_data)
    twilio_response.error! unless resp.kind_of? Net::HTTPSuccess

    h = REXML::Document.new(resp.body)
    sid = REXML::XPath.first(h, "//Sid")

    @message.SmsMessageSid = sid.text # TODO use snake case for model attributes

    respond_to do |format|
      if @message.save
        flash[:notice] = 'Message was successfully created.'
        format.html { redirect_to(@message) }
        format.xml  { render :xml => @message, :status => :created, :location => @message }
      else
        format.html { render :action => "new" }
        format.xml  { render :xml => @message.errors, :status => :unprocessable_entity }
      end
    end
  end
end