正则表达式匹配Domain.CCTLD [英] Regex to match Domain.CCTLD

问题描述

有没有人知道正则表达式来匹配Domain.CCTLD？我不想要子域名，只有原子域。例如， docs.google.com 不匹配，但 google.com 没有。然而，这样的东西就像 .co.uk ，CCTLD这样的东西变得复杂。有没有人知道解决方案？感谢提前。

编辑：我已经意识到我也必须处理多个子域，如 john。 doe.google.co.uk 。现在需要一个解决方案：P。

解决方案

根据上面的评论，我将重新解释这个问题 - - 而不是使正确表达式与它们匹配，我们将创建一个匹配它们的函数，并应用该函数过滤域名列表，以仅包含第一类域，例如google.com，amazon.co.uk。

首先，我们需要一个TLD列表。正如格雷格所说，公众后缀列表是一个很好的开始。假设您已将列表解析为一个名为后缀的python数组。如果这不是你舒服的，评论，我可以添加一些代码，将做到这一点。

  suffixes = parse_suffix_list（suffix_list.txt）
  

现在我们需要一些代码来标识一个给定的域名是否匹配模式some-name.suffix：

  def is_domain（d）：
后缀中的后缀：
如果d.endswith（后缀）：
＃获取基本域名，不带后缀
 base_name = d [0 :-( suffix.length + 1）] 
＃如果它包含'。'，它是一个子域。 
如果不是base_name.contains（'。'）：
返回true 
＃如果我们到达这里，没有找到匹配
 return false 
  

Does anyone know a regular expression to match Domain.CCTLD? I don't want subdomains, only the "atomic domain". For example, docs.google.com doesn't get matched, but google.com does. However, this gets complicated with stuff like .co.uk, CCTLDs. Does anyone know a solution? Thanks in advance.

EDIT: I've realized I also have to deal with multiple subdomains, like john.doe.google.co.uk. Need a solution now more than ever :P.

解决方案

Based on your comment above, I'm going to reinterpret the question -- rather than making a regex that will match them, we'll create a function that will match them, and apply that function to filter a list of domain names to only include first class domains, e.g. google.com, amazon.co.uk.

First, we'll need a list of TLDs. As Greg mentioned, the public suffix list is a great place to start. Let's assume you've parsed the list into a python array called suffixes. If this isn't something your comfortable with, comment and I can add some code that will do it.

suffixes = parse_suffix_list("suffix_list.txt")

Now we'll need code that identifies whether a given domain name matches the pattern some-name.suffix:

def is_domain(d):
    for suffix in suffixes:
        if d.endswith(suffix):
            # Get the base domain name without suffix
            base_name = d[0:-(suffix.length + 1)]
            # If it contains '.', it's a subdomain. 
            if not base_name.contains('.'):
                return true
    # If we get here, no matches were found
    return false

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