Skip to content

Instantly share code, notes, and snippets.

What would you like to do?
Example of refreshing tokens with jwt
* Example to refresh tokens using
* It was requested to be introduced at as part of the jsonwebtoken library,
* since we feel it does not add too much value but it will add code to mantain
* we won't include it.
* I create this gist just to help those who want to auto-refresh JWTs.
const jwt = require('jsonwebtoken');
function TokenGenerator (secretOrPrivateKey, secretOrPublicKey, options) {
this.secretOrPrivateKey = secretOrPrivateKey;
this.secretOrPublicKey = secretOrPublicKey;
this.options = options; //algorithm + keyid + noTimestamp + expiresIn + notBefore
TokenGenerator.prototype.sign = function(payload, signOptions) {
const jwtSignOptions = Object.assign({}, signOptions, this.options);
return jwt.sign(payload, this.secretOrPrivateKey, jwtSignOptions);
// refreshOptions.verify = options you would use with verify function
// refreshOptions.jwtid = contains the id for the new token
TokenGenerator.prototype.refresh = function(token, refreshOptions) {
const payload = jwt.verify(token, this.secretOrPublicKey, refreshOptions.verify);
delete payload.iat;
delete payload.exp;
delete payload.nbf;
delete payload.jti; //We are generating a new token, if you are using jwtid during signing, pass it in refreshOptions
const jwtSignOptions = Object.assign({ }, this.options, { jwtid: refreshOptions.jwtid });
// The first signing converted all needed options into claims, they are already in the payload
return jwt.sign(payload, this.secretOrPrivateKey, jwtSignOptions);
module.exports = TokenGenerator;
* Just few lines to test the behavior.
const TokenGenerator = require('./token-generator');
const jwt = require('jsonwebtoken');
const tokenGenerator = new TokenGenerator('a', 'a', { algorithm: 'HS256', keyid: '1', noTimestamp: false, expiresIn: '2m', notBefore: '2s' })
token = tokenGenerator.sign({ myclaim: 'something' }, { audience: 'myaud', issuer: 'myissuer', jwtid: '1', subject: 'user' })
setTimeout(function () {
token2 = tokenGenerator.refresh(token, { verify: { audience: 'myaud', issuer: 'myissuer' }, jwtid: '2' })
console.log(jwt.decode(token, { complete: true }))
console.log(jwt.decode(token2, { complete: true }))
}, 3000)

This comment has been minimized.

Copy link

saifkamaal commented Sep 6, 2017

use the jsonwebtoken module instead of jwt - if you get the error.


This comment has been minimized.

Copy link
Owner Author

ziluvatar commented Jun 7, 2018

Done, thanks!


This comment has been minimized.

Copy link

bessaadi commented Aug 27, 2018


Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
You can’t perform that action at this time.