How to log the auth user?

[Stephan Seitz]

Hi!

HA-Proxy 2.2.9
I have an HA-Proxy frontend and an application backend. The 
authentification is done by the backend.

The HA-Proxy replaces an older pound proxy. Pound could log like Apache, 
so the log contained the user name, even if pound didn’t authenticate the 
user.

Searching the net I have found the following string to decode the 
username from the auth string:

        req.fhdr(Authorization),regsub(^Basic\s+,,i),b64dec,regsub(:.+,)

So I tried the following in the frontend section:

        http-request set-var(req.s1) 
req.fhdr(Authorization),regsub(^Basic\s+,,i),b64dec,regsub(:.+,)
        log-format "%[var(req.s1)]"

But this doesn’t work, I get „-” in the log.

What did I wrong?

Many greetings,

        Stephan

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