NodeJs JWT Passport - node.js

Question

I use nodejs with passport Auth JWT. I can create the JWT Token but If I secure my route with passport.authenticate('jwt') it's not work and i have an errors.
My Error :
TypeError: Cannot read property '_id' of undefined
at JwtStrategy._verify (D:\Programes\nodejs\node\CRUD_NodeAngular5\NodeServer\config\passport.js:15:39)
at D:\Programes\nodejs\node\CRUD_NodeAngular5\NodeServer\node_modules\passport-jwt\lib\strategy.js:110:26
at D:\Programes\nodejs\node\CRUD_NodeAngular5\NodeServer\node_modules\passport-jwt\node_modules\jsonwebtoken\verify.js:27:18
at _combinedTickCallback (internal/process/next_tick.js:131:7)
at process._tickCallback (internal/process/next_tick.js:180:9)
Passport.js
var JwtStrategy = require('passport-jwt').Strategy;
var ExtractJwt = require('passport-jwt').ExtractJwt;
var User = require('../models/User');
var config = require('./database');
module.exports = function(passport) {
var opts = {};
opts.jwtFromRequest = ExtractJwt.fromAuthHeader();
opts.secretOrKey = config.secret;
passport.use(new JwtStrategy(opts, function(jwt_payload, done) {
User.findById(jwt_payload.$__._id, function(err, user) {
if (err) {
return done(err, false);
}
if (user) {
done(null, user);
} else {
done(null, false);
}
});
}));
};
Login
router.post('/login', function(req, res) {
User.findOne({ email: req.body.email }, function(err, user) {
if (err) throw err;
if (!user) {
res.send({ success: false, message: 'Authentication failed. User not found.' });
console.log('User not found');
} else {
user.comparePassword(req.body.password, function(err, isMatch) {
if (isMatch && !err) {
var token = jwt.sign(user.toJSON(), config.secret, {expiresIn: 1000 });
var decoded = jwt.decode(token);
console.log(decoded);
res.json({ success: true, token:'JWT ' + token, decoded: decoded });
console.log('Connected : ' + token);
} else {
res.send({ success: false, message: 'Authentication failed. Passwords did not match.' });
console.log('Password is wrong');
}
});
}
});
});
Route Dashboard Not work
router.get('/dashboard', passport.authenticate('jwt', { session: false }), function(req, res) {
res.send('It worked! User id is: ' );
});

Answer 1

lets clean your code it's simple :-
Step1: create config file and load where you keep your routes
var checkAuth = require('../config/check-auth');
Step2: copy paste it in check-auth
const jwt = require('jsonwebtoken');
module.exports = (req,res,next)=>{
try{
const token = req.headers.authorization.split(" ")[1];
const decoded = jwt.verify(token,"secret");
req.userData = decoded;
next();
}catch(error){
return res.status(401).json({message:'Auth failed'});
}
}
step 3 :protect your route
router.get('/dashboard',checkAuth , { session: false }),
function(req, res) {
res.send('It worked! User id is: ' );
});
protect all your routes by passing checkAuth as parameter