ASP.net ashx handler not caching
问题 We recently installed Robohash as a great fallback for Gravatar: http://static2.scirra.net/avatars/128/5df4bf5d460c9497fdb35578e923ad1f.png As you can see robohashes are hilariously brilliant and served from our static domain. The URL is actually rewritten: <action type="Rewrite" url="gravatar.ashx?hash={R:2}&size={R:1}" appendQueryString="false" /> And in the same web.config file we have the cache profiles: <staticContent> <clientCache httpExpires="Sun, 29 Mar 2020 00:00:00 GMT"