Analysis of the storage location of mobile phone cookies, do you really understand it?

Analysis of the storage location of mobile phone cookies, do you really understand it?

With the popularity of smart phones, our lives are increasingly inseparable from mobile phones. At the same time, we use mobile browsers to surf the Internet more and more frequently. In the process of using mobile phones to surf the Internet, we will inevitably come into contact with the concept of cookies. What are cookies? Where is it stored in our mobile phones?

Cookie (English name HTTP Cookie or Web Cookie), as the name suggests, is a "little dessert". Basically, we are exposed to it when using a browser to browse the website, so Cookie can be regarded as the website's user identity authentication a way. The function of a cookie is to save some of the user's information on the client (user's browser) so that the client's operational needs can be quickly restored when the user uses it again. Cookies mainly store some status information, such as login status, shopping cart information, user preferences, etc.

Next, let’s take a look at where cookies are stored in mobile browsers.

1. iOS system

In iOS, all data of the application is stored in the sandbox. The so-called sandbox means that each application can only access Your own file directory and cannot access the directories of other applications. In iOS, there is a Cookies folder in the sandbox directory of each application, which stores all the cookie information of the application.

Sample code:

NSArray *cookieStorage = [[NSHTTPCookieStorage sharedHTTPCookieStorage] cookies];
for (NSHTTPCookie *cookie in cookieStorage) {
    NSLog(@"cookie信息：%@", cookie);
}

2. Android system

In Android, the location where cookies are stored is also the private directory of the application. In Android, the private directory of an application is divided into two types, namely internal storage and external storage. In terms of cookie storage location, we only need to pay attention to internal storage. In Android, different browsers have different cookie storage locations. For example, in the Chrome browser, cookies are stored in the /data/data/com.android.chrome/app_chrome/Default/Cookies file.

Sample code:

CookieManager cookieManager = CookieManager.getInstance();
String cookieStr = cookieManager.getCookie(url);
Log.d("cookie信息", cookieStr);

Summary:

The above is our analysis of the storage location of mobile phone cookies. In fact, during the actual development process, we can obtain it directly through the corresponding API to the corresponding cookie information. Although cookies pose risks to user privacy, it is undeniable that they play an important role in user browsing experience, so we need to use cookies reasonably to provide users with a better experience.

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