The file system module in Node.js provides all file-related functions. You can fetch file details with a so called “stats” instance. A part of the “stats” instance is a file’s last modified date. {{outline}} Last Modified Date of a File Retrieve a stats instance of a given file …

Security is a high-priority concern in every application. You should always look out for vulnerabilities in used libraries and your infrastructure. The same holds true for JWT because the token signing contains a hashing or encryption part. In this tutorial, you’ll learn how to switch the JWT signing algorithm, …

The file system module in Node.js provides all file-related functions. Access file details with the help of a so called “stats” instance. {{outline}} Created Date of a File Use the fs module in Node.js to retrieve a stats instance of a given file including meta data like the …

The previous tutorials on basic JWT logout and immediate JWT logout focused on the functionality to invalidate tokens. They didn’t focus on project architecture, clean code, or where to apply actions. That’s what you’ll change in this tutorial: refactor your code to find a better place to …

Working with dates and times in JavaScript can be cumbersome. The Date class provides methods to interact with dates and times. Usually, you need to put more effort into calculating the value that you’re interested in. {{outline}} In various situations, it’s favorable to calculate the seconds since epoch …

The first tutorial on JWT logout shows you a basic logout when using JSON web token (JWT). The downside of this logout is that users can authenticate requests for the remaining JWT lifetime. Only the refresh token is revoked. In contrast to the first tutorial, you’ll now implement a …

When working on a new feature or app idea, storing data on the file system can be a good solution. You can skip the database setup and save JSON to a file instead. {{outline}} Write JSON to File JavaScript comes with the JSON class that lets you serialize an object …

Authenticating users in web applications or APIs has different approaches. Invalidating a user’s server-side session or an authentication-related cookie is in your full control. With JSON web tokens (JWTs), you need to extend your platform with a custom logout handling ensuring to invalidate an active JWT. Because there’s …