In less than 20 lines of code (actually, there are only eight that are doing anything), you have built a functional chat server. Here is the flow of this simple program.

在不到20行代码中(实际上，真正实现功能的代码只有8行)，您已经构建了一个能够使用的聊天服务器。

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Now let's walk through the code and explain how the example fulfills the defined expectation of what a chat server is and does. The first line allows access to the contents of the net module.

现在，让我们检查所有代码，并解释这个例子如何实现聊天服务器预定功能。

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