A follow-up to https://gist.github.com/antishok/fb3d003d16eb72f672a7cc36401657d9

server.js

var express = require('express');
var session = require('express-session');
var FileStore = require('session-file-store')(session);

var store = new FileStore();
var fake = {
	set: (...args) => setTimeout(() => store.set(...args), 1000),
	get: (...args) => store.get(...args),
	createSession: (...args) => store.createSession(...args),
	touch: (...args) => store.touch(...args),
	destroy: (...args) => store.destroy(...args),
	length: (...args) => store.length(...args),
	list: (...args) => store.list(...args),
	expired: (...args) => store.expired(...args),
	on: (...args) => store.on(...args)
};
var app = express();

app.use(session({
	store: fake,
	secret: 'secrets',
	saveUninitialized: false,
	resave: false
}));


app.get('/', (req, res) => {
	res.send('counter: ' + req.session.bla + '<br/><a href="/increment">increment counter</a>')
});

app.get('/increment', (req, res) => {
	req.session.bla = 1 + (req.session.bla || 0);
	res.redirect('/');
});


app.listen(3000, () => {
	console.log('Listening on port 3000');
});