Mastering @RequestHeader in Spring Boot

Learn how to use @RequestHeader in Spring Boot to handle HTTP headers for authentication, metadata, and client information. This annotation is used to bind HTTP header values to method parameters in a controller, improving API security, traceability, and communication between distributed systems. Use @RequestHeader to extract values from HTTP request headers and bind them to method parameters, commonly for metadata like authentication tokens or client information in REST APIs. It supports required, optional, and default values, making it flexible for different use cases. Start with simple examples and consider real-world scenarios like validating authentication tokens or handling multiple headers.