虽然代码比较简单，但是，我认为根据这个，可以实现“网络爬虫”的功能，比如从页面找href连接，然后再得到那个连接，然后再“抓”，不停止地（当然可以限定层数），这样，可以实现“网页搜索”功能。-Although the code is relatively simple, but I think that this can be "networked Reptile" function, such as from the pages to find href link, and then to be that link, and then "play" and not to stop (of course, can limit the number of tiers), so that can be achieved "Web search" feature.