where cookies are saved

Cookies are usually saved in the client's browser, and the browser will save the cookie data in a specific file or memory so that it can be sent to the server in subsequent requests.

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

Cookie is a mechanism for saving data on the client side (usually a browser). When the server sends a field called "Set-Cookie" to the client through the HTTP response header, the client saves the cookie.

Specifically, cookies are usually stored in the client's browser. The browser saves the cookie data in a specific file or memory so that it can be sent to the server on subsequent requests.

In different operating systems and browsers, the location where cookies are stored may be different. Generally speaking, browsers store cookies in one of the following locations:

1. Text files: Some browsers save cookies in text files, usually located in the user's temporary folder middle. These text files are stored in a specific naming format and contain key-value pair information for the cookie.

2. Browser database: Some modern browsers use built-in database engines (such as SQLite) to store cookie data. These database files are usually located in the browser's configuration folder.

No matter where the cookie is stored, the browser will automatically append the corresponding cookie to the "Cookie" field in the request header every time it sends a request to the server. In this way, the server can identify, authenticate and personalize services based on the data in the cookie.

It should be noted that Cookies are stored on the client and therefore can be modified or deleted by the client. Servers should implement appropriate validation and security measures to ensure that cookie data received is valid and authentic.

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