Nodejs working with JWT (JSON Web Token)

npm install jsonwebtoken

var jwt = require('jsonwebtoken');

var auth = {
    id : id,
    name : 'moin',
    email : 'mastermoin409@gmail.com',
} 

var token = jwt.sign({ authToken: auth }, 'shhh.....', {expiresIn : 1800});


'shhh.....' is private key or secret key of your application, it is normally string

1800 is  token expiry time

More about API : https://github.com/auth0/node-jsonwebtoken
        

Expressjs Module for Returning Random 6 digit number

var express = require('express');

module.exports = {
  getToken: function() {
    return Math.round(Math.random()*100000);
  },
};

Rest API example by Express JS

Application File

var express = require('express');
var bodyParser = require('body-parser');

var routerObject = require('router file path'); //routes are defined here

var app = express(); //Create the Express app

app.listen(8000);

app.use(bodyParser.json());
app.use(bodyParser.urlencoded({extended: true}));

app.use('/api', routerObject); //This is our route middleware

module.exports = app;

router file 

var express = require('express');
var router = express.Router();

router.get('/sample', function (request, response) {
    response.json({response:'hello world'});
});


module.exports = router;

Call API As

http://localhost:8000/api/routerObject/sample

Enable CROS origin NODEJS and EXPRESSJS

Add this chunk to app.js

http://code2run.blogspot.ca/2016/01/rest-api-example-by-express-js.html


app.use(function(req, res, next) {
  res.header("Access-Control-Allow-Origin", "*");
  res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
  next();
});

you can replace * with specific domain when your application in turn to production mode

e.g. enable cros request for domain - mastermoin.com 

res.header("Access-Control-Allow-Origin", "mastermoin.com");

* is only recommended for development purpose.