Handle Express-JWT Error In Composable Middleware

Ask Time：2016-06-08T21:11:33 Author：Manish Jangir

I'm implementing JWT authorization for each API like below:

auth.js

import expressJwt from 'express-jwt';
import compose from 'composable-middleware';

var validateJwt = expressJwt({
  secret: config.secrets.session
});

function isAuthenticated() {
    return compose()

    .use(function(req, res, next) {
       validateJwt(req, res, next);
    })
    .use(function(req, res, next) {

    User.find({
            where: {
         id: req.user.id
            }
    }).then(function(user){

            //Handle User
        }).catch(function(err){
            //Handle DB Error
        });
    });
}

index.js

import auth from '../../auth';
import express from 'express';
import controller from './user_group.controller';
import * as validators from './user_group.validations';

// Create router object
const router = express.Router();

// Get all user groups
router.get('/', [auth.isAuthenticated(), validators.index], controller.index);

Everything is working absolutely fine except error handling of JWT. I'm not understanding the function validateJwt(req, res, next); that how to handle the Unauthorized Error stack before moving to the next middleware.

Author:Manish Jangir，eproduced under the CC 4.0 BY-SA copyright license with a link to the original source and this disclaimer.
Link to original article：https://stackoverflow.com/questions/37703502/handle-express-jwt-error-in-composable-middleware

Manish Jangir :

I've done it using the following:\n\n.use(function(err, req, res, next) {\n\n if(err) {\n return res.status(constants.INVALID_OR_NO_ACCESS_TOKEN.code).json({\n status: 'error',\n code: constants.INVALID_OR_NO_ACCESS_TOKEN.code,\n message: constants.INVALID_OR_NO_ACCESS_TOKEN.message\n }).end();\n }\n User.find({\n where: {\n id: req.user.id\n }\n })\n",

2016-06-08T13:26:43

Handle Express-JWT Error In Composable Middleware