从任何网址获取准确的域名 [英] Getting exact domain name from any URL

问题描述

我需要从任何Url中提取确切的域名。

I need to extract the exact domain name from any Url.

例如，

网址： http://www.google.com - >域名：google.com

Url : http://www.google.com --> Domain : google.com

网址： http://www.google.co.uk/path1/ path2 - >域：google.co.uk

Url : http://www.google.co.uk/path1/path2 --> Domain : google.co.uk

如何在c＃中实现？是否有完整的TLD列表或该任务的解析器？

How can this is possible in c# ? Is there a complete TLD list or a parser for that task ?

推荐答案

您可以使用 Uri Class 访问URI的所有组件：

You can use the Uri Class to access all components of an URI:

var uri = new Uri("http://www.google.co.uk/path1/path2");

var host = uri.Host;

// host == "www.google.co.uk"

---

但是，没有内置的方法来删除www.google.co.uk上的子域www。您需要实现自己的逻辑，例如，

---

However, there is no built-in way to strip the sub-domain "www" off "www.google.co.uk". You need to implement your own logic, e.g.

var parts = host.ToLowerInvariant().Split('.');

if (parts.Length >= 3 &&
    parts[parts.Length - 1] == "uk" &&
    parts[parts.Length - 2] == "co")
{
    var result = parts[parts.Length - 3] + ".co.uk";

    // result == "google.co.uk"
}

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