Ruby server code that allows for CORS and sends an SMS via Twilio.

twiliocontroller.rb

require 'rubygems'
require 'twilio-ruby'
require 'net/http'
require 'uri'
require 'json'

class TwilioController < ApplicationController
  TWILIO_ACCOUNT_SID = 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'
	TWILIO_ACCOUNT_TOKEN = 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'
	SENDER_NUMBER = '+xxxxxxxxxx'

	def send_sms
		set_access_control_headers
		head :ok

		# Get recipient phone number from POST.
		number = params["recipient"]

		# # Get body from POST.
		body = params["body"]

		# # Send sms.
		twilio_client = Twilio::REST::Client.new TWILIO_ACCOUNT_SID, TWILIO_ACCOUNT_TOKEN
		twilio_client.account.sms.messages.create(
			:from => "#{SENDER_NUMBER}",
			:to   => "#{number}",
			:body => "#{body}"
		)
		render :file => 'app/views/twiliocon/index.html'
	end

	private
	def set_access_control_headers 
		headers['Access-Control-Allow-Origin'] = '*'
		headers['Access-Control-Allow-Method'] = 'POST, GET, OPTIONS'
		headers['Access-Control-Max-Age'] = '1278000'
		render :json => { :success => true }
    end
end