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User uploaded images are not cached in browser


we just introduced Confluence as our corporate intranet when I noticed that all images that where uploaded by users get an expires http header of January 1st, 1970. As a results they never get cached.

Is there a way to change this behaviour ?



4 answers

0 votes

Hi Michael,

This is strange. Do this happen to just one browser? All users are affected?

I think this is something environmental. Can you check if the behavior happens in another confluence in other machine?



Hi, I was able to reproduce that with IE,FF and Chrome.

And I was able to reproduce it on a windows box and a linux box.

All Confluence 4.3.

Here is an example header for a user uploaded image:

Cache-Control private, max-age=315360000
Connection Keep-Alive
Date Tue, 06 Aug 2013 13:46:49 GMT
Etag "1375771124000"
Expires Thu, 01 Jan 1970 00:00:00 GMT
Keep-Alive timeout=5, max=93
Server Apache
Vary Accept-Encoding

I doubt this is a Confluence setting. You can modify the headers in Tomcat:

Do you really suggest to change the tomcat confluence was bundled with?

Sure! It's just a web server and Confluence is just a web app. If you're using it in production, you'd likely make other configuration changes anyway.

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