短网址还原(UnshortURL)程序的作用就是将这些短网址还原为本来的面目。当前的短网址服务可谓是遍地开花，在方便微博用户交流的同时，却也带来了一些隐患。因为短网址只是将网址变换为另一种较短的网址，而不考究原网址是否带有病毒或者含有不健康内容，抑或是带有令人讨厌的小尾巴的推荐链接。-Short URL Restore (UnshortURL) program is the role of these short URLs to restore the original face. The current short URL service can be described as blossom everywhere, in the convenience of microblogging users at the same time, it also brings some hidden dangers. Because a short URL simply converts the URL to a shorter URL, regardless of whether the original URL contains a virus or contains unhealthy content, or a referral link with an annoying small tail.