HTTPS on localhost using NextJS + Express

Question

System Information

• Express: 4.16.4
• NextJS: 8.0.3
• React: 16.8.4
• ReactDOM: 16.8.4

Goal

Answer 1

You just need to use the createServer method of https module.

const { createServer } = require('https');
const { parse } = require('url');
const { readFileSync } = require('fs');
const next = require('next');

const port = 3000;
const dev = process.env.NODE_ENV !== 'production';
const app = next({ dev });
const handle = app.getRequestHandler();

const httpsOptions = {
  key: readFileSync('./certificates/key.pem'),
  cert: readFileSync('./certificates/cert.pem')
};

app.prepare()
  .then(() => {
    createServer(httpsOptions, (req, res) => {
      const parsedUrl = parse(req.url, true);
      handle(req, res, parsedUrl);
    }).listen(port, err => {
      if (err) throw err;
      console.log(`> Ready on https://localhost:${port}`);
    })
  });

Answer 2

Our straightforward, switchable implementation:

const app = require('express')();
const https = require('https');
const http = require('http');
const next = require('next');
const fs = require('fs');
const path = require('path');

const HTTPS = true;
const server = HTTPS
  ? https.createServer(
      {
        key: fs.readFileSync(path.resolve(__dirname, './server.key')),
        cert: fs.readFileSync(path.resolve(__dirname, './server.cert')),
      },
      app
    )
  : http.createServer({}, app);

const port = parseInt(process.env.PORT, 10) || 3000;
const dev = process.env.NODE_ENV !== 'production';
const nextApp = next({ dev });
const nextHandler = nextApp.getRequestHandler();

nextApp.prepare().then(() => {
  app.get('/api/something', (req, res) => {
    res.json({});
  });

  // ...

  app.get('*', (req, res) => {
    return nextHandler(req, res);
  });

  server.listen(port, (err) => {
    if (err) throw err;
    console.log(`> Ready on http${HTTPS ? 's' : ''}://localhost:${port}`);
  });
});

Answer 3

Other answer seemed to just drop express... Found a solution after some difficulty with both server code and certificate so hopefully can save someone else the trouble!

First of all, solid advice for creating localhost certificate here: https://letsencrypt.org/docs/certificates-for-localhost/

Secondly, simple code that offers HTTP/HTTPS with next js and express:

const next = require('next');
const express = require('express');
const http = require('http');
const https = require('https');
const fs = require('fs');

const ports = {
  http: 3080,
  https: 3443
}
const dev = process.env.NODE_ENV !== 'production';
const app = next({ dev });
const handle = app.getRequestHandler();
const server = express();  

const options = { 
  key: fs.readFileSync('localhost.key'),
  cert: fs.readFileSync('localhost.crt'), 
};

app.prepare().then(() => {           
  server.all('*', (req, res) => {
    return handle(req, res)    
  });
  http.createServer(server).listen(ports.http);
  https.createServer(options, server).listen(ports.https);
});

It is worth noting that one could omit or redirect either port.

Answer 4

Below work for me very well for next server with https;

Using this official documentation of node js https module Creating HTTPS Server

const { createServer } = require('http')
const { parse } = require('url')
const next = require('next')
const { readFileSync } = require('fs');

const port = parseInt(process.env.PORT, 10) || 3000
const dev = process.env.NODE_ENV !== 'production'
const app = next({ dev })
const handle = app.getRequestHandler()

const httpsOptions = {
    pfx: readFileSync('./certificates/AMB.pfx'),
    passphrase: 'Testabc$'
  };

app.prepare().then(() => {
    createServer(httpsOptions, (req, res) => {    
        const parsedUrl = parse(req.url, true)
        const { pathname, query } = parsedUrl

        if (pathname === '/login') {
            app.render(req, res, '/login', query)
        } else {
            handle(req, res, parsedUrl)
        }
    }).listen(port, err => {
        if (err) throw err
        console.log(`> Ready on https://localhost:${port}`)
    })
})