How do short URLs services work?
问题 How do services like TinyURL or Metamark work? Do they simply associate the tiny URL key with a [virtual?] web page which merely provide an "HTTP redirect" to the original URL? or is there more "magic" to it ? [original wording] I often use URL shortening services like TinyURL, Metamark, and others, but every time I do, I wonder how these services work. Do they create a new file that will redirect to another page or do they use subdomains? 回答1: No, they don't use files. When you click on a