Sure, I have done such a thing myself and it was very simple. Let's say you do http_get(rss_address). Create a function http_cached_get, that looks for a recent

Sure, I have done such a thing myself and it was very simple. Let's say you do http_get(rss_address). Create a function http_cached_get, that looks for a recent cached response, and if none exists delegates to http_get and saves the response. In python this is like 10 lines.