How to get the port number in node.js when a request is processed?

Question

If I have two node.js servers running, how can I tell which server called the processRequest function?

var http = require('http');
var https = require('https');
function processRequest(req, res) {
    res.writeHead(200);
    res.end("hello world, I'm on port: " + ???.port + "\n");
}
var server1 = http.createServer(processRequest).listen(80);
var server2 = https.createServer(processRequest).listen(443);

Originally I wanted the port number, but couldn't find the object/variable to give it to me. Based on the below answer it makes more sense to determine encrypted vs non-encrypted since the point is to know which of the http servers the request came in on.

Answer 1

The req parameter is an instance of IncomingMessage from which you can access the socket.

From there you can access both the localPort and remotePort.

Something like:

console.log(req.socket.localPort);
console.log(req.socket.remotePort);

Answer 2

This way you get the port number:

var http = require('http');
var server = http.createServer().listen(8080);

server.on('request', function(req, res){
    res.writeHead(200, {"Content-Type": "text/html; charset: UTF-8"});
    res.write("Hello from Node! ");
    res.write(" Server listening on port " + this.address().port);
    res.end();
});