Remote IP in Bun.serve (no framework)

Question

I'm using bun v0.1.7 (NOT nodejs), I'm trying the built-in basic http server without any other framework:

export default {
  port: 3000,
  fetch(request: Request) {    
    const remoteIp = request.headers.get('x-forwarded-for') || 'UNKNOWN';
    return new Response(remoteIp);
  },
};

Can I get the remote IP from the client when I'm not using any proxies ?

I've tried request.connenction.remoteAddress, request.socket... But nothing seems to be implemented.

Answer 1

Bun v1.0.4 release implements server.requestIP().

Quoting from the release notes:

With #6165, the IP address of a given Request can now be retrieved using server.requestIP().

Bun.serve({
  port: 3000,
  handler: (req, res) => {
    console.log(server.requestIP(req));
  },
});

This does not read headers like X-Forwarded-For or X-Real-IP. It simply returns the IP address of the socket, which may correspond to the IP address of a proxy.

We've also added support to node:http for getting the socket address. net.Socket().address now returns an object with address, port, and family properties.