Re: [squid-users] matching a user agent with regex

From: Amos Jeffries <>
Date: Tue, 16 Nov 2010 02:33:13 +1300

On 15/11/10 17:53, Rolf Loudon wrote:
> hello
> I've been trying and failing to match the user agent string for the browser acl type. I would appreciate any help. I don't know exactly what squid sees as the user agent but a capture of the traffic shows the user agent header and I'm basing it on what I see there.
> The complicating fact is that a simple substring search won't work as there are multiple browsers with the same string. I wish to match the Windows and Mac OS X version of Safari. Its user agent string is shown as:
> Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_4; en-us) AppleWebKit/533.18.1 (KHTML, like Gecko) Version/5.0.2 Safari/533.18.5\r\n
> Looking simply for "Safari" works but the same string is reported in Google's Chrome user-agent, which I don't want to match.
> I've tried things like ".*Version.* Safari.*" and including [0-9] groups for the version numbers, all to no avail.

Squid ACL delimit on whitespace. What the above means is:
    contains "Version" OR "Safari"

Prefix and suffix .* are not useful. The regex library assumes them to
be present unless ^ and $ special characters are used to indicate otherwise.

What you are looking for is I think:
  acl safari browser Version/[^S]*Safari


Please be using
   Current Stable Squid 2.7.STABLE9 or 3.1.9
   Beta testers wanted for
Received on Mon Nov 15 2010 - 13:33:17 MST

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