cache-expiration

The following resources are missing a cache expiration How to set cache expiration for javascript file?

hi I have asp.net application. I'm using external javascript files in my application. When I test my site with page speed tool from google it says that following resources are missing a cache expiration. also some of the images and css files. Can you give me please some examples how to set it and where exactly I need to set it. ...

Rails Automatic Cache Expiration

Does Rails do any kind of automatic (time-based?) caching expiration for pages/actions/fragments? This seems like such a simple question, yet I can't find it anywhere (or maybe I'm looking in the wrong place). ...