[Feature request] "internal: unable to net.SplitHostParse: missing port in address"

[cstdenis]

Is your feature request related to a problem? Please describe.

I am getting a lot of "internal: unable to net.SplitHostParse: missing port in address" in my debug logs.

Solution you would like.

I suspect this is because I am using a socket file. If this is the case, a check to suppress the error would keep the log files a lot cleaner.

Also, if you don't, at least include the string it is trying to split from in the message so the error is more useful.

Describe alternatives you have considered.

No response

Additional context

No response

[Xe]

Can you paste an exact log entry with the source field intact?

[cstdenis]

root@mei:/ # anubis -version
Anubis 1.23.1
root@mei:/ # nginx -v
nginx version: nginx/1.28.0

{"time":"2026-03-24T23:00:05.682338583Z","level":"DEBUG","source":{"function":"main.main.XForwardedForUpdate.func6","file":"/wrkdirs/usr/ports/www/go-anubis/work/anubis-src-vendor-npm-1.25.0/internal/headers.go","line":137},"msg":"computing X-Forwarded-For header failed","err":"internal: unable to net.SplitHostParse: missing port in address"}
{"time":"2026-03-24T23:00:06.544499059Z","level":"DEBUG","source":{"function":"main.main.XForwardedForUpdate.func6","file":"/wrkdirs/usr/ports/www/go-anubis/work/anubis-src-vendor-npm-1.25.0/internal/headers.go","line":137},"msg":"computing X-Forwarded-For header failed","err":"internal: unable to net.SplitHostParse: missing port in address"}
{"time":"2026-03-24T23:00:07.691180098Z","level":"DEBUG","source":{"function":"main.main.XForwardedForUpdate.func6","file":"/wrkdirs/usr/ports/www/go-anubis/work/anubis-src-vendor-npm-1.25.0/internal/headers.go","line":137},"msg":"computing X-Forwarded-For header failed","err":"internal: unable to net.SplitHostParse: missing port in address"}
{"time":"2026-03-24T23:00:24.78241953Z","level":"DEBUG","source":{"function":"main.main.XForwardedForUpdate.func6","file":"/wrkdirs/usr/ports/www/go-anubis/work/anubis-src-vendor-npm-1.25.0/internal/headers.go","line":137},"msg":"computing X-Forwarded-For header failed","err":"internal: unable to net.SplitHostParse: missing port in address"}
{"time":"2026-03-24T23:00:24.787522098Z","level":"DEBUG","source":{"function":"main.main.XForwardedForUpdate.func6","file":"/wrkdirs/usr/ports/www/go-anubis/work/anubis-src-vendor-npm-1.25.0/internal/headers.go","line":137},"msg":"computing X-Forwarded-For header failed","err":"internal: unable to net.SplitHostParse: missing port in address"}
{"time":"2026-03-24T23:00:25.045934127Z","level":"DEBUG","source":{"function":"main.main.XForwardedForUpdate.func6","file":"/wrkdirs/usr/ports/www/go-anubis/work/anubis-src-vendor-npm-1.25.0/internal/headers.go","line":137},"msg":"computing X-Forwarded-For header failed","err":"internal: unable to net.SplitHostParse: missing port in address"}
{"time":"2026-03-24T23:00:49.683431767Z","level":"DEBUG","source":{"function":"main.main.XForwardedForUpdate.func6","file":"/wrkdirs/usr/ports/www/go-anubis/work/anubis-src-vendor-npm-1.25.0/internal/headers.go","line":137},"msg":"computing X-Forwarded-For header failed","err":"internal: unable to net.SplitHostParse: missing port in address"}
{"time":"2026-03-24T23:01:03.7898021Z","level":"DEBUG","source":{"function":"main.main.XForwardedForUpdate.func6","file":"/wrkdirs/usr/ports/www/go-anubis/work/anubis-src-vendor-npm-1.25.0/internal/headers.go","line":137},"msg":"computing X-Forwarded-For header failed","err":"internal: unable to net.SplitHostParse: missing port in address"}
{"time":"2026-03-24T23:01:04.229258672Z","level":"DEBUG","source":{"function":"main.main.XForwardedForUpdate.func6","file":"/wrkdirs/usr/ports/www/go-anubis/work/anubis-src-vendor-npm-1.25.0/internal/headers.go","line":137},"msg":"computing X-Forwarded-For header failed","err":"internal: unable to net.SplitHostParse: missing port in address"}
{"time":"2026-03-24T23:01:04.881418041Z","level":"DEBUG","source":{"function":"main.main.XForwardedForUpdate.func6","file":"/wrkdirs/usr/ports/www/go-anubis/work/anubis-src-vendor-npm-1.25.0/internal/headers.go","line":137},"msg":"computing X-Forwarded-For header failed","err":"internal: unable to net.SplitHostParse: missing port in address"}

Nginx config for reference unless it's a problem here

location ^~ /.within.website/
{
    auth_request off;

    proxy_pass http://unix:/usr/jails/anubis/var/run/anubis/anubis.sock;
    proxy_set_header Host $host;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header X-Forwarded-Proto $scheme;

    proxy_pass_header Set-Cookie;
    proxy_cookie_path / /;
    proxy_cookie_domain off;
    proxy_cookie_flags ~ secure samesite=None;
}

location @anubis_challenge
{
    internal;
    auth_request off;

    # Ensure we don't 502 on large challenge payloads
    proxy_buffers 8 16k;
    proxy_buffer_size 32k;
    proxy_read_timeout 60s; # Argon2 can take time on slow CPUs

    #rewrite ^(.*)$ /challenge break;
    proxy_pass http://unix:/usr/jails/anubis/var/run/anubis/anubis.sock;

    proxy_set_header Host $host;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header X-Forwarded-Proto $scheme;

    # CRITICAL: Allow the challenge to set the validation cookie
    proxy_pass_header Set-Cookie;
    proxy_cookie_path / /;
    proxy_cookie_domain off;
    proxy_cookie_flags ~ secure samesite=None;
}

location = /anubis_auth
{
    internal;
    auth_request off;
    # Note the ':auth' at the end of the socket path
    proxy_pass http://unix:/usr/jails/anubis/var/run/anubis/anubis.sock:/auth;
    proxy_pass_request_body off;
    proxy_set_header Content-Length "";
    proxy_set_header Host $host;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header X-Forwarded-Proto $scheme;
}