Force static images to be cached in browser

anyone Dec 13, 2004 5:19 PM

I have a Problem with static images in a servlet.

The images are stored with the servlet in a simple war-archive are heavily referenced in the pages generated by the servlet (up to 200 images per page, the average user reloads this page about every 10 seconds).

These images normally never change, but some browsers (particularly ie) reload every single image on each page refresh. (whereas firefox and opera are smart enough to fetch these images from cache)

Is there any way to attach a information on these images that they must not be refetched, without writing an servlet and manually set an "Cache-Control" or "Pragma"-Header?

Thanks a lot,
-Marc-

1. Re: Force static images to be cached in browser

camel Dec 14, 2004 4:04 AM (in response to anyone)

Instead of a servlet, you can use a Filter, which you can apply to *.gif, for instance. For details, see http://www.onjava.com/pub/a/onjava/2004/03/03/filters.html
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2. Re: Force static images to be cached in browser

anyone Dec 14, 2004 4:10 AM (in response to anyone)

Hey great - seems like this is exactly what i need.
This solves also another problem i had

Thanks a lot!
-Marc-
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