What is http status code?

http statusless code means that in the HTTP protocol, the server does not record the client's status information, each request is independent, and the server does not remember previous request information, which means that the server cannot distinguish Whether different requests come from the same client, there is no way to know the client's historical status. The design concept is to keep the protocol simple and scalable. Since servers on the Internet need to handle a large number of requests, if the server needs to maintain the status information of each client, it will bring a huge burden to the server.

The operating system for this tutorial: Windows 10 system, DELL G3 computer.

HTTP status codeless means that in the HTTP protocol, the server does not record the client's status information. Each request is independent, and the server does not remember previous request information. This means that the server cannot distinguish whether different requests come from the same client, nor can it know the historical state of the client.

The design concept of HTTP status code is to keep the protocol simple and scalable. Since servers on the Internet need to handle a large number of requests, if the server needs to maintain the status information of each client, it will put a huge burden on the server. Furthermore, maintaining state information also increases network transmission overhead and latency.

In the HTTP status codeless model, each request is independent, and the server only needs to process it according to the content of the request and return a corresponding response. The server does not save the client's state information, nor does it remember previous requests. This means that the server cannot respond differently based on previous requests.

In order to solve this problem, HTTP introduces some mechanisms to implement state management. One of the most commonly used mechanisms is the use of Cookies and Sessions.

Cookie is a mechanism for storing data on the client side. The server can send data to the client by setting a cookie in the response, and the client will save the data locally. When the client sends the next request, the cookie information will be included in the request header and sent to the server. The server can identify the client based on cookie information and provide personalized services.

Session is a mechanism for storing data on the server side. The server assigns a unique Session ID to each client and sends the Session ID to the client. The client will include the Session ID in the request header and send it to the server in subsequent requests. The server can identify the client based on the Session ID and obtain previously stored data.

Although Cookie and Session can implement state management, they are still supplementary mechanisms under the HTTP status codeless model. The server still does not record the client's status information, but uses these mechanisms to manage and maintain the status.

In summary, HTTP status codeless means that in the HTTP protocol, the server does not record the client's status information. Each request is independent, and the server does not remember previous request information. In order to achieve state management, HTTP introduces mechanisms such as Cookie and Session. This design philosophy maintains the simplicity and scalability of the protocol, while also bringing higher load and latency to the server.

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