Node.js: Express.js set keep-alive

Question

What is the correct way for set keep alive in express.js web server?

I have found some examples..

Example n. 1 :

var express = require('express');
var app = express();
var server = app.listen(5001);

server.on('connection', function(socket) {
  socket.setTimeout(30 * 1000);
});

Example n. 2 :

var express = require('express');
var app = express();
var server = app.listen(5001);
server.keepAliveTimeout = 30 * 1000;

Answer 1

set server.headersTimeout with a value higher than server.keepAliveTimeout . ( check this solution for a similar issue and this page out)

example code:

var express = require('express');
var app = express();
var server = app.listen(5001);
server.keepAliveTimeout = 30 * 1000;
server.headersTimeout = 35 * 1000;