Conf 2:

• interface: username printed in freshrss logs 👍 / username printed in reverse proxy logs 👍
• api: username printed in freshrss logs 👍 / username not printed in reverse proxy logs

We are closed to the end, just have to find a way to send username for api from freshrss logs to reverse proxy logs, but probably it's more a matter of reverse proxy than freshrss.

Thank for your help.

At the bottom of p/.htaccess, you could try the following (a restart of the Docker container is needed, but no rebuild necessary):

<IfModule mod_headers.c>
	<If "req('X-Request-Log-User') == 'true'">
		Header always set X-Log-User "%{LOG_REMOTE_USER}e"
	</If>
</IfModule>

Then from your reverse proxy, you need to send X-Request-Log-User: true and you should receive X-Log-User: alice as part of the response, which you can log as you want. You are welcome to experiment, and if you find a convenient way, we could include the above snippet by default.

Alternatively, you could implement in your reverse proxy something similar to:
https://github.com/Alkarex/FreshRSS/blob/49e30fd7ba5bd80ffa6be3a4868d4851b7592fba/p/api/.htaccess#L3

Dear Alkarex,

Unfortunately my skills in the field are quite limited, I have tried several different instructions in the location block of the reverse proxy without success.

So I asked the question to the maintainer of the reverse proxy to try to find a solution.

Nevertheless, I think that the amendments already proposed are interesting.

I will get back to you as soon as I have found a solution regarding the reverse proxy.

Ok.
#8392 is merged in the rolling release edge branch. Please update and keep an eye on any regression

Dear Alkarex,

I find one solution (it is probably not the best one, but it works)

So I insert inside location block of the reverse proxy this code:

    if ($http_authorization ~ "GoogleLogin auth=([^\/]+)") {
        set $freshrss_api_user $1;
    }

and inside server block:

map $freshrss_api_user $my_remote_user {
    "" $remote_user;
    default $freshrss_api_user;
    }

Last step, modify log_format by replacing $remote_user by $my_remote_user
At this time, everything works fine with edge-alpine freshrss docker version.

Regards.