[squid-users] Content filtering, this could be an idea

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Hi all,

I'm back with my content filtering problem. At this time, Squid is not
smart enough to see that a renamed valid mp3 file to test.txt is still a
n audio file. I don't want my users to download these kind of files.

It seems that there is no workaround with existing redirectors so let's
write one. But I don't know anything about squid's working for now. I'm
just wondering if it feasable.

Imagine that Squid downloads the bad file but before giving it to the
user who initiate the donwload, it checks it with the "file -bi <file>",
if it's a mp3 file will return audio/mpeg. If this matches a denied
regexp, don't give the file to the user.

What do you think?

Best regards,
Fabian
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