Query for authorization username

[Justin Lloyd]

In my dev environment, I have a few users configured to use Basic authorization (configured in the Nginx backend) and I'd like to be able to perform VSL queries based on the auth user. This is what I was able to come up with, but I'm wondering if there is a simpler way that I'm just not seeing.

require blob;
if (req.http.Authorization) {
    set req.http.X-Auth-User = regsub(blob.encode(IDENTITY,
                                                  blob=blob.decode(BASE64,
                                                                   encoded=regsub(req.http.Authorization, "^Basic (.*)", "\1"))),
                                      ":.*$", "");
}

varnishtop -I ReqHeader:X-Auth-User
varnishlog -i ReqURL -q 'ReqHeader:X-Auth-User ~ "someuser"'

Thanks,
Justin

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