Unable to make socketioxide serve requests from custom req_path

[Mohana-Manikandan]

Hi,

I’m trying to configure my server to handle WebSocket requests on a custom req_path using socketioxide and axum.

This is what I have tried,

let engine_config = EngineIoConfig {
    req_path: settings.server.path.into(),
    ..Default::default()
};

let mut socketio_config = SocketIoConfig::default();
socketio_config.engine_config = engine_config;

let (layer, io) = SocketIo::builder()
    .with_config(socketio_config)
    .with_state(Arc::clone(&app_state))
    .with_adapter::<RedisAdapter<_>>(adapter)
    .build_layer();

let _ = app_state.socket_io.set(io.clone());

io.ns("/", on_connect).await?;

let app = axum::Router::new()
    .route("/", get(|| async { "ok" }))
    .layer(layer)

Prior to this, I had ngnix rewriting paths in the request this way

location /xxx/socket.io/ {
    proxy_pass http://localhost:7000/socket.io/; 
    proxy_http_version 1.1;
    
    proxy_set_header Upgrade \$http_upgrade;
    proxy_set_header Connection "upgrade";
    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_read_timeout 86400;
    proxy_redirect off;
}

This setup worked perfectly.

After removing the nginx path rewrite, I expected socketioxide to handle requests directly on /xxx/socket.io/ (the custom path set in req_path). However, it seems like the server still only accepts connections on /socket.io/ and ignores /xxx/socket.io/.

Trace on config
SocketIoConfig { engine_config: EngineIoConfig { req_path: "/xxx/socket.io/", ping_interval: 25s, ping_timeout: 20s, max_buffer_size: 128, max_payload: 100000, ws_read_buffer_size: 4096, transports: 3 }, ack_timeout: 5s, connect_timeout: 45s, parser: Common(CommonParser), server_id: Uid(0a6F-cyagNyWugRC) }

Traces prior to removing path rewrite
2025-08-25T13:09:07.060054Z INFO ThreadId(02) request: src/main.rs:225: 101|0ms method=GET uri=/socket.io/ version=HTTP/1.1

After removing nginx path rewrite
2025-08-25T13:16:40.872385Z INFO ThreadId(15) request: src/main.rs:225: 404|0ms method=GET uri=/xxx/socket.io/ version=HTTP/1.1

Is there an extra step I’m missing to get socketioxide to recognize the custom path directly?

How can I configure axum and socketioxide to serve WebSocket requests on a custom namespace/path without relying on nginx rewrites?

Any pointers or examples would be much appreciated!

[Mohana-Manikandan]

Sorry, I am not sure as to what i did to make it work,

I changed the builder into this

    let (layer, io) = SocketIo::builder()
        .req_path(settings.server.path.clone())
        .with_state(Arc::clone(&app_state))
        .with_adapter::<RedisAdapter<_>>(adapter)
        .build_layer();

And it seems to pick up from the new path. I must have made a mistake somewhere else.