How to make a redirect (301) in Node.js / Express?

I have a static site, a simple single page layout that I deploy in Dokku. I need to make a redirect (301) from www to non www and from `*.website1.com` to `website2.com`, but I don't know how. I was trying to use express-force-domain in npm but it makes my URL's crazy and having some redirect loops, I was trying other methods that I find on the web but none succeeds.

my server.js is:

var express = require('express')
var app = express();

app.set('port', (process.env.PORT || 80))
app.use(express.static(__dirname + '/public'))

app.get('/', function(request, response) {
response.send('Hello World!')
})

app.listen(app.get('port'), function() {
console.log("Node app is running at localhost:" + app.get('port'))
})

That is the version that works, but without redirects.

As far as I understand it, to set an HTTP 301 code, you would set the response code to be `301` and then set the `Location` header to whatever url you want it to redirect to. I don't think this is the preferred way to do www to non-www urls though

To anyone arriving here from Google, while @frederic's answer is still what is recommended by the express docs, the `response.send(status, body)` style has been deprecated and will generate a warning (I am on express 4.13.4 at time of writing), and more importantly I found that it no longer produced the desired result when redirecting.

As @Markasoftware mentioned, to achieve an automatically followed 301, you need to set the location header to the url you want. The request body can be empty:

response.set('location', 'https://my.redirect.location');
response.status(301).send()

res.redirect(301, 'http://yourotherdomain.com' + req.path)

See [Express documentation][1].


[1]:

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