封装了winsock的通信模块，具有不限制大小的文件和数据传送功能，具有rpc调用接口，是一个属于文件和数据传输的高层封装类的客户端-the communications module, with no limit to the size of documents and data transmission functions with rpc call interface, is a document belonging to the data transmission and high-level Packaging category of client