[squid-users] Re: Cache Windows Updates ONLY

I notice Microsoft update for windows 8 is adding query strings to
URLs as a token. This makes it hard for open source caches to work
effectively with Microsoft Windows 8 updates. Maybe this is a method
to force users to use Microsoft's proprietary windows update caching
software. The recent KB2919355 update is a whopping 4Gb download.
Bigger than an ISO for windows 8. I don't understand why Microsoft
make the updates so large, and why they make them difficult to cache.
It is almost as if they wish to maximise the bandwidth windows update
consumes.

The form is:
http://bg.v4.a.dl.ws.microsoft.com/dl/content/d/updt/2013/09/f4d26fdb-d520-48da-add6-6a3c0832d14a_6fda48f8c83be2a15f49b83b10fc3dc8c1d15774.appx?P1=TOKEN&P2=TOKEN&P3=TOKEN&P4=TOKEN

The server won't deliver the file unless the tokens are in place.
Whenever a file is fetched, it appears to be the same irrespective of
the tokens. I will carry out more research based on checksums of
multiple files to make sure.
These same files are typically fetched using range requests. The file
example above is over 1Gb. Well worth caching.

I'm looking for a way to configure squid3 so that if the domain is
ws.microsoft.com and if the URL includes .appx?P1= then the URL is
fetched with query string from the source and stored without query
string. Any future request should match and deliver the stored file
irrespective of any query string.

Is there a convenient way to configure Squid to do this?

Thanks.
Received on Thu Apr 10 2014 - 17:50:40 MDT