Understanding Middleware in Backend Architecture

When building robust backend systems, it's essential to consider the security and integrity of the data being exchanged. One crucial aspect of achieving this is by implementing middleware. In this context, middleware refers to a layer of code that intercepts every incoming request to the application, inspecting it before deciding whether to pass it through to the core logic or reject it.

The Onion Architecture Analogy

Imagine your web server as an onion, with multiple layers. The core of the onion represents your business logic, such as fetching user data or processing orders. The outer layers are where the middleware resides. Each incoming request must pass through these outer layers before reaching the core.…