How to Accept POST XML to Rails Controller

I have a web service that will be sending a POST to my site in the form of XML i am trying to figure out how to actually receive that XML data.

This will not be a file it will be a POST request of data

I can set up a route for it to post to but how can i caputure the info and send it to nokogiri so i can parse it

post URL is

http://ift.tt/1HlStne

Routes:

resources :post_everywhere do
  post :create_account
end

controller:

class PostEverywhereController < ApplicationController
  def create_account

    /**** How do i capture the info here ****/

  end
end