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This article mainly introduces "what is the meaning of HTTP status code 200,304". In daily operation, I believe that many people have doubts about the meaning of HTTP status code 200,304. the editor consulted all kinds of data and sorted out a simple and easy-to-use method of operation. I hope it will be helpful to answer the doubt of" what is the meaning of HTTP status code 200,304? " Next, please follow the editor to study!

200,304 of HTTP status codes

The HTTP status code (HTTP Status Code) is a three-digit code that represents the response status of a web server. Through these numbers, the expression of state can be simplified. There are dozens of status codes, of which the first digit is 1-5. According to these five numbers, status codes can be divided into five categories. The beginning of 1 indicates that the request is being processed; the beginning of 2 indicates that the request has been processed successfully; the beginning of 3 indicates redirection; the beginning of 4 indicates a request error; and the beginning of 5 indicates a server error.

In the process of sniffing and grabbing packets, there are two common types: 200 and 304. Both of these status codes are related to the ability to obtain important information. When the customer requests the server resource for the first time, the server successfully returns the resource, and the status code is 200. Therefore, packets with a status code of 200 often contain data obtained by the user from the server.

After each resource request is completed, it is usually cached on the client, and the valid time and modification time of the resource are recorded. When the customer requests the resource again, the client first looks for the resource from the cache. If the resource exists and is valid, the corresponding request packet will not be generated without requesting the server.

If it is not valid, the client will request the server to retrieve it. The server will determine the modification time, and if it has not been modified, it will return the status code 304, telling the client that the resource is still valid and that the client will directly use the cached resource. For the response of 304, the infiltrator can analyze the corresponding request packet and obtain the resource path. If there are no restrictions on access to the resource, you can request it directly. Otherwise, you need to hijack Cookie and get it.

At this point, the study of "what is the meaning of HTTP status codes 200,304" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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