module Middleware # In development mode, it is common to use a database from a production site for testing # with their data. Unfortunately, you can end up with dozens of missing avatar requests # due to the files not being present locally. This middleware, only enabled in development # mode, will replace those with an appropriate image. class MissingAvatars def initialize(app, settings = {}) @app = app end def call(env) if (env['REQUEST_PATH'] =~ /^\/uploads\/default\/avatars/) path = "#{Rails.root}/public#{env['REQUEST_PATH']}" unless File.exist?(path) default_image = "#{Rails.root}/public/images/d-logo-sketch-small.png" return [ 200, { 'Content-Type' => 'image/png' }, [ File.read(default_image)] ] end end status, headers, response = @app.call(env) [status, headers, response] end end end