一个文件传输源程序!C/S结构型,同步阻塞类型的最简单文件传输!

支持多线程断点续传的文件传输(FTP)程序（含服务端和客户端、支持蓝牙(Bluetooth)传输）-Support multi-threaded HTTP file transfer (FTP) procedures (including client and client services, support Bluetooth (Bluetooth) transmission)