Programmatically stop and restart express servers (to change ports)

Question

I\'m looking to be able to basically change ports that my express app is running on.

I\'ve tried:

server.on(\'close\', function() {
  server.listen(3000)         


        

Answer 1

Thanks to @aymericbeaumet, the following snippet works with Express 4:

var app = express();

var server = app.listen(8080, function() {
  console.log('Listening :)');
  server.close(function() { console.log('Doh :('); });
});

Answer 2

The issue is that .listen is asynchronous. By calling .close immediately after calling .listen, you are closing it before it has been opened.

Try this instead.

server.listen(8080, function() {
  server.close();
});