fs = require "fs"
express = require "express"
http = express.createServer()

httpsOptions =
  key: fs.readFileSync('key.pem'),
  cert: fs.readFileSync('cert.pem')
https = express.createServer(httpsOptions)

http.all '*', (req, res) ->
  console.log "HTTP: #{req.url}"
  res.redirect "https://#{req.headers["host"]}#{req.url}"

http.error (error, req, res, next) ->
  console.log "HTTP error #{error}, #{req.url}"

https.error (error, req, res, next) ->
  console.log "HTTPS error #{error}, #{req.url}"

https.all '*', (req, res) ->
  console.log "HTTPS: #{req.url}"
  res.send("Hello, World!")

http.listen(80)
https.listen(443)

$ curl --include --silent http://localhost/foo
HTTP/1.1 302 Moved Temporarily
X-Powered-By: Express
Content-Type: text/html
Location: https://localhost/foo
Connection: keep-alive
Transfer-Encoding: chunked

<p>Moved Temporarily. Redirecting to <a href="https://localhost/foo">https://localhost/foo</a></p>

$ curl --include --silent --insecure https://localhost:443/foo
HTTP/1.1 200 OK
X-Powered-By: Express
Content-Type: text/html; charset=utf-8
Content-Length: 13
Connection: keep-alive

Hello, World!%

curl --include --silent --location --insecure 'http://localhost/foo?bar=bux'
HTTP/1.1 302 Moved Temporarily
X-Powered-By: Express
Content-Type: text/html
Location: https://localhost/foo?bar=bux
Connection: keep-alive
Transfer-Encoding: chunked

HTTP/1.1 200 OK
X-Powered-By: Express
Content-Type: text/html; charset=utf-8
Content-Length: 13
Connection: keep-alive

Hello, World!%

curl  --insecure https://localhost:80/foo
curl: (35) Unknown SSL protocol error in connection to localhost:80

curl http://localhost:443/foo
curl: (52) Empty reply from server

var https = require('https');
var fs = require('fs');

var sslkey = fs.readFileSync('ssl-key.pem');
var sslcert = fs.readFileSync('ssl-cert.pem')

var options = {
    key: sslkey,
    cert: sslcert
};

express.createServer(options);

app.use(function(req, res, next) {
  var schema = req.headers['x-forwarded-proto'];

  if (schema === 'https') {
    // Already https; don't do anything special.
    next();
  }
  else {
    // Redirect to https.
    res.redirect('https://' + req.headers.host + req.url);
  }
});