ExpressJS JWT authentication middleware example

middleware.js

// JWT authentication middleware example.
// Uses RS256 strategy with .pem key pair files.

const fs = require('fs');
const jwt = require('jsonwebtoken');

module.exports = (req, res, next) => {

    let publicKey = process.env.PUBLIC_KEY;

    try{
        const token = req.headers.authorization.split(' ')[1]; //req.headers.token;
        console.log(token);
        var decoded = jwt.verify(token, publicKey)
        console.log(decoded);
        

        next();

    }catch(err){
      return res.status(401).json({error: err, message: 'Invalid token.'});
    }
};