squid refresh_pattern - different url with same XYZ package

[Mohsen Saeedi <mohsen.saeedi@xxxxxxxxx>]

Hi

I have a problem with squid refresh_pattern. i used regex on 
refresh_pattern and every exe file for example cached and then clients 
can download it with high rate. but when someone download from some 
website(for example mozilla or filehippo)  , they redirect to different 
url but the same XYZ exe file. for example firefox-version.exe cached to 
the disk but when another clients send new request, it redirect 
automatically to different url for downloading same firefox. how can i 
configure squid for this  condition?


Thanks,