Redirecting HTTP to HTTPS in Node.js

server.js

// *.pem files were generated with:
// openssl req -x509 -newkey rsa:4096 -keyout key.pem -out cert.pem -nodes -days 365

const http = require('http')
const https = require('https')
const fs = require('fs')

http.createServer((req, res) => {
  res.writeHead(301, { Location: `https://localhost${req.url}` })
  res.end()
}).listen(80)

const options = {
  key: fs.readFileSync('key.pem'),
  cert: fs.readFileSync('cert.pem')
}
https.createServer(options, (req, res) => {
  res.writeHead(200)
  res.end('Works!')
}).listen(443)