What does http status code do?

The http status code is used to indicate the processing results of the request, provide information about the reason for the request failure, and be used for redirection. Detailed introduction: 1. Indicate the processing result of the request. When the client sends a request to the server, the server will return the corresponding status code based on the processing of the request. Through the status code, the client can understand whether the request is successful, failed, or requires further processing. Operation; 2. Provide information about the reason for request failure. When the client receives a response with status code 4xx or 5xx, through the status code, the client can learn the specific cause of the error, etc.

Operating system for this tutorial: Windows 10 system, Dell G3 computer.

HTTP status code refers to the identification code of the server's response status to the client's request in the HTTP protocol. They are used to inform the client of the processing results of the request so that the client can handle it accordingly based on different status codes. HTTP status codes consist of three digits and are divided into five categories, each with different meanings and uses. This article will introduce the role of HTTP status codes and common status codes.

First of all, one of the functions of HTTP status code is to indicate the processing result of the request. When the client sends a request to the server, the server will return the corresponding status code based on the processing of the request. Through the status code, the client can understand whether the request was successful, failed, or requires further action. In this way, the client can perform corresponding processing according to different status codes, such as resending the request, displaying error information, or redirecting, etc.

Secondly, HTTP status codes can also provide information about why the request failed. When a client receives a response with a status code of 4xx or 5xx, they indicate that there was a problem with the request or that there was an error on the server. Through the status code, the client can understand the specific cause of the error and better handle the error situation. For example, a status code of 404 indicates that the requested resource does not exist, a status code of 500 indicates an internal server error, a status code of 403 indicates that the request was rejected by the server, etc.

In addition, HTTP status codes can also be used for redirects. After the server receives the client's request, if it needs to redirect the client to another URL, the server will return a response with status code 3xx. After receiving such a response, the client will perform corresponding operations based on the redirection information in the response, such as resending the request to a new URL or jumping directly to the new URL. Common redirect status codes include 301 permanent redirect, 302 temporary redirect, and 307 temporary redirect.

The following are some common HTTP status codes and their meanings:

- 200 OK: Indicates that the request was successful and the server successfully processed the client's request.

- 404 Not Found: Indicates that the requested resource does not exist and the server cannot find the requested resource.

- 500 Internal Server Error: Indicates an internal server error. An error occurred while the server was processing the request.

- 302 Found: Indicates that the requested resource has been temporarily moved to another URL.

- 401 Unauthorized: Indicates that the request requires user authentication, and the client needs to provide valid authentication information.

- 403 Forbidden: Indicates that the server has rejected the client's request and the client does not have permission to access the requested resource.

In short, HTTP status code plays a very important role in the HTTP protocol. They are used to indicate the outcome of a request, provide information about why the request failed, and redirect. Through status codes, the client can perform corresponding processing according to different status codes to improve user experience and network communication efficiency. Therefore, it is very important for developers and network administrators to understand the meaning and purpose of HTTP status codes.

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