A simple Windows FTP client/server implemented by Qt5 in C++
Qt5Core.dll
Qt5Gui.dll
Qt5Widgets.dll
libstdc++-6.dll
libwinpthread-1.dll
https://www.ibm.com/developerworks/cn/linux/l-cn-socketftp/
https://en.wikipedia.org/wiki/List_of_FTP_commands
https://en.wikipedia.org/wiki/List_of_FTP_server_return_codes
http://blog.csdn.net/cjc211322/article/details/43416179
http://blog.csdn.net/xiaoquantouer/article/details/58001960