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Custom Filters and OncePerRequestFilter in Spring Boot
In the world of Spring Boot development, filters play a crucial role in processing requests before they reach the servlet or controller. Two commonly used filters in Spring Boot are the custom filter and the OncePerRequestFilter. In this article, we'll explore these filters, understand their use cases, and see how to implement them effectively.
Introduction to Filters
Filters are components that can intercept HTTP requests and responses, allowing developers to manipulate them before they are processed by the controller or returned to the client. They can be used for various purposes, such as authentication, logging, modifying headers, and more.
Custom Filters
Custom filters are user-defined filters that you can create to perform specific tasks on incoming requests. They provide a flexible way to add custom behavior to your application.
Creating a Custom Filter
To create a custom filter, you need to implement the javax.servlet.Filter interface and override its methods. Here’s a simple example of a custom filter that logs the details of each incoming request:
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import…
