Rack Middleware to block IP addresses to active_admin

restrict_addresses.rb

class RestrictAddresses

  def initialize(app)
    @app = app
  end
  
  def call(env)
    request = Rack::Request.new(env)
    incoming_ip_address = request.env['REMOTE_ADDR']
    allowed_range = ['127.0.0.1']
    if request.fullpath.include?("/admin") and !(allowed_range).include?(incoming_ip_address)
      [301, {"Location" => "http://www.betapond.com"}, self]
    else
      @app.call(env)
    end
  end

  def each(&block)
  end
  
end