authenticating_with_pusher.rb

# in routes.rb add your endpoint

post 'pusher/auth', to: "pusher#auth"

# create a pusher_controller.rb in your api

class Api::V1::PusherController < Api::V1::BaseController

  skip_authorization_check
  skip_before_filter :check_api_auth!, only: [:auth]

  def auth
    if current_user
      response = Pusher.authenticate(params[:channel_name], params[:socket_id])
      render json: response
    else
      head :forbidden
    end
  end
end