一个简单的C++ http客户端，可以根据指定url从http服务器下载指定的文件。-A simple C++ http client, according to the specified url from the http server to download the file specified.

W5500芯片用STM32F4单片机控制，连接PC机实现HTTP网页服务器的整个项目文件例程-W5500 chip microcontroller with STM32F4 control, connect your PC to achieve HTTP web server, the entire project file routines