Ruby on Rails Ruby

# app/controllers/pixels_controller.rb
# ActionController::API: no session, cookies or browser-version checks for a beacon.
class PixelsController < ActionController::API
  GIF = "R0lGODlhAQABAIAAAP///wAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw==".unpack1("m0").freeze

  def show
    no_store
    send_data GIF, type: "image/gif", disposition: "inline"
  end
end

# config/routes.rb
Rails.application.routes.draw do
  get "/pixel.gif", to: "pixels#show", format: false
end