How to deply nats behind nginx when using websocket?

[sgpublic]

Hi! I'm just trying to deply nats behind nginx, this is my nats config:

websocket {
  port: 9222
  no_tls: true
  same_origin: false
  compression: false
}

jetstream {
  store_dir: "/var/lib/nats"
  max_mem_store: 128Mb
  max_file_store: 1Gb
}

authorization {
  token: "..."
}

And this is my nginx config:

server {
    listen 80;
    listen [::]:80;
    server_name nats.example.com;
    # enforce https
    return 301 https://$server_name$request_uri;
}

server {
    listen 443 ssl;
    listen [::]:443 ssl;
    server_name nats.example.com;

    ssl_certificate ...;
    ssl_certificate_key ...;    

    add_header X-Content-Type-Options nosniff;
    add_header X-XSS-Protection "1; mode=block";
    add_header X-Download-Options noopen;
    add_header X-Permitted-Cross-Domain-Policies none;

    location / {
        proxy_http_version 1.1;
        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 Upgrade $http_upgrade;
        proxy_set_header X-FORWARDED-PROTO https;
        proxy_set_header X-NginX-Proxy true;
        proxy_set_header Connection "Upgrade";
        proxy_redirect off;
        proxy_pass http://127.0.0.1:9222;
    }
}

When I use this command to connect nats directly, I got the right output:

root@OpenWrt:/etc/nginx/conf.d# nats --server ws://nats.example.com:9222/ws --token xxx kv get mybuget mykey
mybuget > mykey revision: 4 created @ 2025-09-30 10:11:18

xxxx

But if I use this command to connect nats through nginx, I got error:

root@OpenWrt:/etc/nginx/conf.d# nats --server wss://nats.example.com/ws --token xxx kv get mybuget mykey
nats: error: nats: no servers available for connection

Am I missing something, or does NATS not currently support running websockets behind a reverse proxy? I would be very grateful for any help I could get!