[Bug 64338] Expose balancer member state to origin / upstream server

[bu...@apache.org]

https://bz.apache.org/bugzilla/show_bug.cgi?id=64338

--- Comment #9 from Yann Ylavic <yl...@gmail.com> ---
I'd suggest using the PROXY_WORKER_*_STAT characters or proxy_wstat_tbl strings
rather than the numeric/mask value. Something like this maybe:

static char *worker_status_str(apr_pool_t *p, const proxy_worker *worker)
{
    apr_array_header_t *str = apr_array_make(p, 13, sizeof(char));
    proxy_wstat_t *wstat = proxy_wstat_tbl;
    while (wstat->flag) {
        if (worker->s->status & wstat->bit) {
            APR_ARRAY_PUSH(str, char) = wstat->flag;
        }
        wstat++;
    }
    APR_ARRAY_PUSH(str, char) = '\0';
    return str->elts;
}

Regarding the X-Worker-Status header, possibly it could be conditional (opt-in)
to "ProxyAddWorkerHeaders on" or alike (similar to ProxyAddHeaders)? One does
not necessarily want to expose this information to the backend.

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