On tis, 2007-09-25 at 21:34 +0300, Alexander K wrote: > The last one is interesting; I can actually see the full uri, which is good. > > If I use the full uri: > http://support.fujitsu-siemens.com/download/FileDownload/fileDownload.aspx?S > oftwareGUID=1758541C-E30A-4126-B5E4-F9DBF9D9E8CC&FileFolder=Downloadfiles&Fi > leTypeExtension=zip&FileNameClient=FSC_WN6301A_miniCard_WLAN_IEEE802_11_b_g_ > 7_1_0_70__1008383.zip&FileSize=436724&From=SWpoW1djPF9iW0plOGhlbWlbaB0m > > It gives me the download-dialog and I can successfully download the file. > > However, if I download the file, remove it and re-download, it ain't coming > from cache. > I am using the same uri both times, just copy-pasting the uri. > > Now I don't have idea why the item is not being cached / why does not Squid > recognize it? Because the server really do not want the file to be cached. The headers says: HTTP/1.1 200 OK Date: Tue, 25 Sep 2007 19:10:49 GMT Server: Microsoft-IIS/6.0 X-Powered-By: ASP.NET X-AspNet-Version: 1.1.4322 Content-Disposition: attachment; filename=FSC_WN6301A_miniCard_WLAN_IEEE802_11_b_g_7_1_0_70__1008383.zip Content-Length: 436724 Set-Cookie: ASP.NET_SessionId=hcxqcyqdyh22nlur05xzr5j2; path=/ Cache-Control: private Content-Type: application/octet-stream The key thins here is a) That it's a query URL, with what looks like unique parameters, so each request will likely be different even if you convince Squid to cache the result.. b) The server has expressed a quite strong opinion that the file must not be cached in shared caches (Cache-Control: private). c) There is no Expires/Last-Modified/max-age headers to base freshness calculations on. d) There is no ETag for conditional caching (where the content is cached, but each query is first verified with the origin). Note: Squid-3 has a refresh_pattern override for overriding overriding Cache-Control: private. So any solution for caching these objects is going to be quite custom tailored for this site. There is no generic workaround to cache such cache-unfriendly objects. > Do I need to modify mime / file assocations somehow? No. Not releveant to HTTP caching. > Also, I think that to get this work, the string after "&From" should be > static. That leads to another question: is there way to manipulate / replace > part of uris using Squid? Yes, by using an url rewriter. See url_rewriter_program. Regards Henrik
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