用来通过HTTP协议下载的程序，支持断点续传和多线程下载。 注意，该程序一次只能下载一个任务，那个列表虽然可以拉很多进去，不过是摆设。-Through the HTTP protocol is used to download programs to support HTTP and multi-threaded downloading. Note that the program can only download a task that lists Although you can pu