How to make express's request.ip work in Bun

The solution

Just adjust your express app code like below:

import { createServer } from 'http';

const app = express();

// your express setups: app.use(), app.get(), etc...

// then use cereateServer from http module
const server = createServer(app);

// then consolidate request socket address
server.on('request', (req, _res) => {
 // eslint-disable-next-line @typescript-eslint/no-unused-expressions
 req.socket.remoteAddress; // make express req.ip work in bun
});

// make the server listen to requests as usual
server.listen(
  process.env.PORT,
  process.env.NODE_ENV !== production ? 'localhost' : '0.0.0.0',
  () => {
    console.log('Listening !!!!')
  }
);

This twitter post may help you get it.