How do I host multiple Node.js sites on the same IP/server with different domains?

Question

I have a linux server with a single IP bound to it. I want to host multiple Node.js sites on this server on this IP, each (obviously) with a unique domain or subdomain. I wa

Answer 1

Based on @Michaaatje and @papiro, a very easy way:

Say you have some typical pages such as...

var app = express()
app.use(sess)
app.use(passport.initialize())
app.use(passport.session())
app.use('/static', express.static('static'))

app.get('/', ensureLoggedIn("/loginpage"), function(req, res, next) {
    ...
})

app.get('/sales', ensureLoggedIn("/loginpage"), function(req, res, next) {
    ...
})

app.get('/about', ensureLoggedIn("/loginpage"), function(req, res, next) {
    ...
})

app.post('/order', ensureLoggedIn("/loginpage"), urlencodedParser, (req, res) => {
    ...
})

.. and so on.

Say the main domain is "abc.test.com"

But you have an "alternate" domain (perhaps for customers) which is "customers.test.com".

Simply add this ...

var app = express()
app.use(sess)
app.use(passport.initialize())
app.use(passport.session())
app.use('/static', express.static('static'))

app.use((req, res, next) => {
    req.isCustomer = false
    if (req.headers.host == "customers.test.com") {
        req.isCustomer = true
    }
    next();
})

and then it is this easy ...

app.get('/', ensureLoggedIn("/loginpage"), function(req, res, next) {
    if (req.isCustomer) {
        .. special page or whatever ..
        return
    }
    ...
})

app.get('/sales', ensureLoggedIn("/loginpage"), function(req, res, next) {
    if (req.isCustomer) {
        res.redirect('/') .. for example
        return
    }
    ...
})

app.get('/about', ensureLoggedIn("/loginpage"), function(req, res, next) {
    if (req.isCustomer) { ... }
    ...
})

app.post('/order', ensureLoggedIn("/loginpage"), urlencodedParser, (req, res) => {
    if (req.isCustomer) { ... }
    ...
})

Thanks to @Michaaatje and @papiro .