angular-jwt

This library will help you work with JWTs. It's comprehended of 2 basic services

Installing it

You have several options:

bower install angular-jwt

npm install angular-jwt

<script type="text/javascript" src="https://rawgit.com/auth0/angular-jwt/master/dist/angular-jwt.js"></script>

jwtHelper

jwtHelper will take care of helping you decode the token and check its expiration date.

Decoding the token

function Controller(jwtHelper) {
  var expToken = 'eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpc3MiOiJodHRwczovL3NhbXBsZXMuYXV0aDAuY29tLyIsInN1YiI6ImZhY2Vib29rfDEwMTU0Mjg3MDI3NTEwMzAyIiwiYXVkIjoiQlVJSlNXOXg2MHNJSEJ3OEtkOUVtQ2JqOGVESUZ4REMiLCJleHAiOjE0MTIyMzQ3MzAsImlhdCI6MTQxMjE5ODczMH0.7M5sAV50fF1-_h9qVbdSgqAnXVF7mz3I6RjS6JiH0H8';  

  var tokenPayload = jwtHelper.decodeToken(expToken);
}

Getting the token expiration date

function Controller(jwtHelper) {
  var date = jwtHelper.getTokenExpirationDate(expToken);
}

Checking if token is expired

function Controller(jwtHelper) {
  var bool = jwtHelper.isTokenExpired(expToken);
}

More examples

You can see some more examples of how this works in the tests

jwtInterceptor

JWT interceptor will take care of sending the JWT in every request.

Basic usage

function Config($httpProvider, jwtInterceptorProvider) {
  jwtInterceptorProvider.tokenGetter = function(localStorage) {
    return localStorage.getItem('id_token');
  }
  $httpProvider.interceptors.push('jwtInterceptor');
}

function Controller($http) {
  // If localStorage contains the id_token it will be sent in the request
  // Authorization: Bearer [yourToken] will be sent
  $http({
    url: '/hola',
    method: 'GET'
  });
}

Using promises on the tokenGetter: Refresh Token example

As sometimes we need to get first the id_token in order to send it, we can return a promise in the tokenGetter. Let's see for example how we'd use a refresh_token

function Config($httpProvider, jwtInterceptorProvider) {
  jwtInterceptorProvider.tokenGetter = function(localStorage, jwtHelper) {
    var idToken = localStorage.getItem('id_token');
    var refreshToken = localStorage.getItem('refresh_token');
    if (jwtHelper.isTokenExpired(idToken)) {
      // This is a promise of a JWT id_token
      return auth.refreshToken(refreshToken).then(function(id_token) {
        localStorage.setItem('id_token', id_token);
        return id_token;
      });
    } else {
      return idToken;
    }
  }
  $httpProvider.interceptors.push('jwtInterceptor');
}

function Controller($http) {
  // Authorization: Bearer [yourToken] will be sent. 
  // That token might be a new one which was got from the refresh token
  $http({
    url: '/hola',
    method: 'GET'
  });
}

More examples

You can see some more examples of how this works in the tests

Contributing

Just clone the repo, run npm install, bower install and then gulp to work :).

License

MIT