vk_controller+routes

class VkController < ApplicationController
  skip_before_action :verify_authenticity_token, raise: false
  def index
    a = params['name']

    return render json: {'key'=>a.reverse!}
  end

  def wow
    a = params['name']

    return render json: {'key'=>a.reverse!}
  end

end

#####
  root to: 'home#index'
  get 'vk', to: 'vk#index'
  post 'vk/wow', to: 'vk#wow'