Works fine in version 2.x but not in version 4.1.

[bilalbaz1]

Hi.
I want to use api and socket.io on the same port. That way it's cheaper on hereku.
The problem is; socket.io works fine in version 2.x but not in version 4.1. It doesn't give any error either. What could be the problem? The codes are like this;

const app = require('express')();
const http = require('http').createServer(app);

const userRouter = require('./router/userRouter');

const errMiddleware = require('./middleware/errMiddleware');

const PORT = process.env.PORT || 3000;

app.use('/api/users', userRouter);


app.get('/', (req, res) => {
  res.json({ "mesaj": "hoşgeldin!" });
});

app.use(errMiddleware);

http.listen(PORT, () => {
  console.log(`Listening on ${PORT}`);
});


const io = require("socket.io")(http, {
  cors: {
    origin: "*",
   methods: ["GET", "POST"],
  },
});

io.on("connection", (socket) => {

console.log("----- connection");

  socket.on("odaya_gir", (odaId, data) => {
    socket.join(odaId);
  });

  socket.on("disconnect", () => {
    console.log("****** disconnect");
  });


});

package

"express": "^4.17.1",
"socket.io": "^4.1.2",

[darrachequesne]

I don't see anything wrong in the code you provided. Could you please provide a complete example?

[qiulang]

Today I upgraded my socket.io from 2.x to 4.1 and it works fine. So I was wondering did you upgrade socket.io-client or set allowEIO3: true ?