Socket IO namespace not working with Express

Question

I have tried setting up a namespace on the backend,

const server = require("http").createServer(app);
const connectedUsers = {};

const io = require("socket.io")(server, {
  path: "/socket",
  serveClient: false,
  // below are engine.IO options
  pingInterval: 10000,
  pingTimeout: 5000,
  cookie: false
});

const singularConnection = io.of("/singular-socket");

singularConnection.on("connection", socket => {
    console.log("unique user connected with socket ID " + socket);
}

And on my client, I try connecting with,

    const socket = io(GATEWAY, {
      path: "/socket/singular-socket",
      transports: ["websocket"],
      jsonp: false
    });

    socket.connect();

    socket.on("connect", () => {
      console.log("connected to socket server");
    });

I've tried different variation of the URL, getting rid of /socket and moving other stuff around, but I can't seem to get it working. What am I doing wrong here?

Nithin Thampi · Accepted Answer · 2019-11-09 16:34:24Z

5

I don't have any experience in using socket.io, but from the docs...

To connect to a namespace, the client code would look like.

const socket = io('http://localhost/admin', {
  path: '/mypath'
});

Here, the socket connects to the admin namespace, with the custom path mypath.

The request URLs will look like: localhost/mypath/?EIO=3&transport=polling&sid= (the namespace is sent as part of the payload).

Following the above lines, your code should look like..

 const socket = io("http://localhost/singular-socket", {
      path: "/socket",
      transports: ["websocket"],
      jsonp: false
    })

Where /singular-socket is the namespace and /socket is the path.

Try this repl

answered Nov 9, 2019 at 16:34

Nithin Thampi

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