What is an Interceptor?

An Interceptor is a component that sits between an incoming request/message and its corresponding Controller. They allow you to read, modify, and process incoming requests.

Why use Interceptors?

Interceptors are useful for:

• Authentication and authorization.
• Request logging and monitoring.
• Request validation.

Types of Interceptors

Sword provides three types:

• Traditional Interceptors.
• Interceptors with associated configuration.
• Tower Layers.

Each type of interceptor has its own characteristics and use cases, which are described in the following sections.

Additionally, for each type, there is a variant applicable to its associated Controller type:

• Web Controllers.
• Socket.IO Controllers.
• gRPC Controllers.