Property 'session' does not exist on type 'IncomingMessage'.ts(2339) any

[Anand-Keshavan]

I get the above error when I try to use the express-session example ( typescript) in the documentation. Here is the code:

`declare module "express-session" {
interface SessionData {

    count: number;
}

}

const sessionMiddleware = session({
secret: "losgatos",
resave: true,
saveUninitialized: true,
});

const app = express();
app.use(sessionMiddleware);
const httpServer = createServer(app);

const io = new Server(httpServer, { /* options */ });
io.engine.use(sessionMiddleware);

o.on("connection", (socket) => {
const sessionId = socket.request.session.id. // <---- error here
...

`
package versions:

"@types/express": "^4.17.21", "@types/express-session": "^1.18.0", "express": "^4.19.2", "express-session": "^1.18.0", "socket.io": "^4.7.5",

[darrachequesne]

Hi! You need to cast the socket.request as an Express Request object:

import { type Request } from "express";

io.on("connection", (socket) => {
  const req = socket.request as Request;

  // ...
});

Reference: https://socket.io/how-to/use-with-express-session