Overview of HTTP Caching
HTTP caching is one of the key mechanisms for improving the performance of websites and web applications. This mechanism helps store temporary HTTP responses so that future requests do not need to send them from the server again. This reduces load time and minimizes the use of server resources.What is RFC 9111?
RFC 9111 is one of the important documents that defines the standards for HTTP caching. This RFC provides detailed guidelines regarding the functioning of caching within the HTTP protocol and includes explanations about naming and registering fields related to caching.The Importance of Registering Fields
The registration of fields in HTTP caching is particularly important. These fields play a crucial role in determining how and when content is cached by proxy servers and routers. In other words, correctly registering these fields can lead to better and more effective management of cached content.How to Register Fields in RFC 9111
The RFC 9111 standard introduces specific methods for registering these fields. These methods assist developers and network managers to make the fields standardized and understandable for both clients and servers defining them.Examples of Using Registered Fields
Currently, for better understanding, here is a sample code demonstrating how to register fields in HTTP-related headers:
Cache-Control: max-age=3600
ETag: "3f80f-1b6-3e1cb03b"
Vary: *
Line-by-Line Explanation of the Code
Cache-Control: max-age=3600 This line specifies that the HTTP response can be cached for up to 3600 seconds (or one hour).
ETag: "3f80f-1b6-3e1cb03b" This line provides a unique identifier for a specific version of the resource being served.
Vary: * This line indicates that all headers of requests can affect the response, and therefore the cache may change based on all of them.