Category: Programming

  • How to check if YouTube video is a SHORT

    How to check if YouTube video is a SHORT

    YouTube and Google do not allow to check if a YouTube video is a Short or a long form video in a simple way. Even the YouTube Data V3 does not provide this information. Yes, you can get a video length (ISO8601 formatted duration) and assume that videos shorter then 60 seconds are Shorts. But…

  • Hibernate could not initialize proxy – no Session

    Hibernate could not initialize proxy – no Session

    The org.hibernate.LazyInitializationException: could not initialize proxy error is a common issue that can occur when working with the Hibernate ORM (Object-Relational Mapping) framework in a Spring Boot application. This error occurs when Hibernate is unable to initialize a proxy object, which is an object that is used to lazily load data from the database. When…

  • How to create and register Spring Boot custom request filter

    Creating a custom request filter in Spring Boot is a relatively simple process that can be accomplished by following a few basic steps. Create a new class that extends the OncePerRequestFilter class. This ensures that the filter will be executed only once per incoming request. In your filter class, override the doFilter method. This method…

  • Authentication vs Authorization – What’s the difference?

    Authentication and Authorization are mixed together. Some developers even swap them randomly. But authentication and authorization are very different things and describe different processes.

  • JWT claims explained – registered, public and private

    JWT, the JSON Web Tokens are a standarized (RFC 7519) way of passing the user’s identity between microservices. Internally, the JWT payload is just a JSON with pertially standarized fields. They are called claims. Some of the claims are defined in the RFC 7519 while some are free to use and abuse freely. The video…

  • What are JWT tokens? Modern authentication and authorization for microservices

    JSON Web Tokens, or JWT, are a great and modern way to handle User identity, authentication, and authorizations. All modern user management systems like Keycloak, AWS Cognito, or Auth0 are issuing JWT tokens! And remember, with microservices, session-based authentication and authorization is a no-go.

  • Can you sell Open-Source software?

    Many companies are afraid of Open-Source software. There are myths and misunderstandings. One of them is: can I sell open source (GPL, MIT, Apache License) to my clients? The answer is both yes and no. There is nothing that prohibits issuing an invoice for Open-Source software. However, license transfer can be tricky. You will learn…

  • How to use stepper motors with Arduino

    Stepper motors are the workhorse of modern automation and mechatronics. You want something to more and move precisely how much wanted it to move? You use a stepper motor. This is why, we use steppers in cars, robots, all kinds of automation, 3D printers, CNC machines. You name it. The main difference between a stepper…

  • Artificial intelligence for developers – GitHub Copilot

    Artificial Intelligence, aka Skynet, is very often overhyped by companies and underhyped by developers (there is no AI, it’s just another IF in the code). It does not change the fact, that AI is used in more and more places. Just look at Tesla autonomous pilot. And for years you can hear that very soon…