How to handle HTTP upgrade in ExpressJS?

Question

The newest ExpressJS doesn't inherit from http.Server anymore.

If I try to listen on the upgrade event, the server will answer with a 404 Not Found.

Current [simplified] code is:

app.on('upgrade', function(req, socket, head) { /* ... */ });

If I try to search for the answer on Google, I'll only find links related to "3.0 -> 4.0 express upgrade", not HTTP upgrade.

EDIT:

As requested by @jfriend00 , my express initialization [simplified] code:

app = express.createServer();
app.listen(self.port, self.ipaddress);

Answer 1

Since my comment seemed to work for you, I'll put it in an answer.

express.createServer() has been deprecated for a long time and removed from Express 4. You would create the app object in Express 4 with:

var app = express()

The http server object is then returned from

var server = app.listen(...)

If you need direct access to the http server object.