Cache Control Image Assets in rails development

Enable image caching in Rails development mode.

原理见 http://code.eoe.cn/6/title/Unicorn和Nginx部署Rails应用的css__js__img等静态资源缓存使用总结

Usage

• Add it to Gemfile

gem 'rack_image_assets_cache_control'

• setup in config/environments/development.rb

  config.middleware.use(Rack::ImageAssetsCacheControl)