Implementing JWT Authentication in AngularJS: Secure Token Handling and Interceptor Logic
I'm collaborating on a project where I'm working on a personal project and Currently developing an AngularJS application where robust security measures are paramount. I'm implementing JWT (JSON Web Tokens) for user authentication and need to ensure that token handling is both efficient and secure. The application is using AngularJS 1.8 with a backend built on Node.js and Express. I’ve set up an Auth service to manage token storage and retrieval, but I’m concerned about the risk of XSS attacks. Here’s my current implementation: ```javascript angular.module('myApp').service('AuthService', function($window) { this.saveToken = function(token) { $window.localStorage['myApp-token'] = token; }; this.getToken = function() { return $window.localStorage['myApp-token']; }; this.isAuthenticated = function() { const token = this.getToken(); return token && !isTokenExpired(token); }; }); ``` While testing, I noticed that the token is being stored in localStorage, which seems vulnerable. What’s a better way to handle this securely? Additionally, I’ve created an HTTP interceptor to attach the token to outgoing requests: ```javascript angular.module('myApp').factory('AuthInterceptor', function(AuthService) { return { request: function(config) { const token = AuthService.getToken(); if (token) { config.headers.Authorization = 'Bearer ' + token; } return config; } }; }); ``` I want to ensure that the interceptor logic is solid and that I'm handling token expiration effectively. Any advice on how to check the token's validity seamlessly and what strategies to leverage for enhancing security? Also, I’m curious about the best practices for protecting against CSRF when using JWTs. Any insights or code samples would be greatly appreciated. What's the best practice here? What would be the recommended way to handle this? This is happening in both development and production on Debian. What am I doing wrong?