Automatic HTTPS connection/redirect with node.js/express


Question

I've been trying to get HTTPS set up with a node.js project I'm working on. I've essentially followed the node.js documentation for this example:

// curl -k https://localhost:8000/
var https = require('https');
var fs = require('fs');

var options = {
  key: fs.readFileSync('test/fixtures/keys/agent2-key.pem'),
  cert: fs.readFileSync('test/fixtures/keys/agent2-cert.pem')
};

https.createServer(options, function (req, res) {
  res.writeHead(200);
  res.end("hello world\n");
}).listen(8000);

Now, when I do

curl -k https://localhost:8000/

I get

hello world

as expected. But if I do

curl -k http://localhost:8000/

I get

curl: (52) Empty reply from server

In retrospect this seems obvious that it would work this way, but at the same time, people who eventually visit my project aren't going to type in https://yadayada, and I want all traffic to be https from the moment they hit the site.

How can I get node (and Express as that is the framework I'm using) to hand off all incoming traffic to https, regardless of whether or not it was specified? I haven't been able to find any documentation that has addressed this. Or is it just assumed that in a production environment, node has something that sits in front of it (e.g. nginx) that handles this kind of redirection?

This is my first foray into web development, so please forgive my ignorance if this is something obvious.

1
154
9/16/2011 10:15:28 PM

Accepted Answer

Ryan, thanks for pointing me in the right direction. I fleshed out your answer (2nd paragraph) a little bit with some code and it works. In this scenario these code snippets are put in my express app:

// set up plain http server
var http = express.createServer();

// set up a route to redirect http to https
http.get('*', function(req, res) {  
    res.redirect('https://' + req.headers.host + req.url);

    // Or, if you don't want to automatically detect the domain name from the request header, you can hard code it:
    // res.redirect('https://example.com' + req.url);
})

// have it listen on 8080
http.listen(8080);

The https express server listens ATM on 3000. I set up these iptables rules so that node doesn't have to run as root:

iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 80 -j REDIRECT --to-port 8080
iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 443 -j REDIRECT --to-port 3000

All together, this works exactly as I wanted it to.

157
11/27/2017 12:01:25 AM

If you follow conventional ports since HTTP tries port 80 by default and HTTPS tries port 443 by default you can simply have two server's on the same machine: Here's the code:

var https = require('https');

var fs = require('fs');
var options = {
    key: fs.readFileSync('./key.pem'),
    cert: fs.readFileSync('./cert.pem')
};

https.createServer(options, function (req, res) {
    res.end('secure!');
}).listen(443);

// Redirect from http port 80 to https
var http = require('http');
http.createServer(function (req, res) {
    res.writeHead(301, { "Location": "https://" + req.headers['host'] + req.url });
    res.end();
}).listen(80);

Test with https:

$ curl https://127.0.0.1 -k
secure!

With http:

$ curl http://127.0.0.1 -i
HTTP/1.1 301 Moved Permanently
Location: https://127.0.0.1/
Date: Sun, 01 Jun 2014 06:15:16 GMT
Connection: keep-alive
Transfer-Encoding: chunked

More details : Nodejs HTTP and HTTPS over same port


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