迷你的FTP客户端和服务器端。自行设定了通信的协议和握手的方式。通过最基础的方式传输文件。可以用于网络编程入门的参考样例。可用于学习最基础的socket编程。因为本程序没有使用任何第三方封装了的API-Mini FTP client and server side. Set their own way handshake protocol and communication. By the most basic way to transfer files. Network programming can be used to refer to a sample entry. Can be used to learn the most basic socket programming. Because the program does not use any third-party API that encapsulates