On Saturday 18 October 2008 05:32:24 you wrote: > I've just grabbed a mapnik tile at random, and these are the headers > sent out with it: > > Date: Sat, 18 Oct 2008 07:20:05 GMT > Server: Apache/2.2.4 (Ubuntu) > Etag: "cb5563ba81dda2fd9bf27cba5a41164f" > Content-Length: 7149 > Cache-Control: max-age=374906 > Expires: Wed, 22 Oct 2008 15:28:32 GMT > Content-Type: image/png > > Therefore, an ISP's transparent proxy should fetch a new version (or > the same one again) after 374906 seconds, or 4.33 days. > > Some ISP's ignore the cache times in their transparent proxies and > therefore should be shouted at. Are any of the tiles you're viewing > older than 4 days? [EMAIL PROTECTED] tiles are every day, as I recall, and > therefore three render cycles could be within the timescale? > Yes, quite older, looks like some yelling is in order. Not that I have much hope for my ISP, I may have to have a script to reload all tiles in the area I'm interested once a week if they don't fix it.
> a [EMAIL PROTECTED] headers set: > Date: Sat, 18 Oct 2008 07:27:36 GMT > Server: Apache > Cache-Control: max-age=10800 > Last-Modified: Fri, 17 Oct 2008 10:47:20 GMT > Content-Length: 16457 > Content-Type: image/png > > Which should expire after 3 hours. Notably, this doesn't have a > Expires: header, which means (theoretically) it could get kept longer > as various levels of proxy/cache grab it from each other... > Maybe this would help? > I guess it should expire, but it doesn't affect me right now, I think. I mostly use mapnik, anyway. > It should be that holding down control and pressing refresh in your > browser should request a new version and not accept cached versions, > but I don't know if this matters to javascript or ISP proxies... > Me neither, in any case, it's not practical to refresh each tile. Thank you very much for the info, now it's time to call them. _______________________________________________ talk mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk
