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

问题描述

我需要从任何URL中提取准确的域名

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

例如，

网址： http://www.google.com - >域：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

哪有这是可能在C＃中？ ？是否有一个完整的TLD列表或该任务分析器

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类来访问一个URI的所有成分：

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"

---

然而，有剥离的子域的www关www.google.co.uk没有内置的方式。你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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