如何从文本文件中的任何地方提取域？

Question

这是我迄今为止尝试过的：

import re

with open('text.txt', 'r') as fh:
     re.findall(r'^[a-z0-9]([a-z0-9-]+\.){1,}[a-z0-9]+\Z"',fh.readline())
print(p)

我正在尝试从此文件中提取域或 URL：File link
我想知道如何使用正则表达式方法做到这一点。
请建议。

Answer 1

上述文件的每一行看起来都非常像 JSON 编码的字典。
所以这是 json 模块的一个很好的例子：

import json

with open("text.txt", "r") as fh:
    domains = []
    for l in fh.readlines():
        d = json.loads(l)
        domains.append(d["name"])
        # some url domains are located in `value` key for the records which have "type":"cname" 
        if (d["type"] == "cname"): domains.append(d["value"])

print(domains)

输出：

['mail.callfieldcompanion.com', 'reseauocoz.cluster007.ovh.net', 'cluster007.ovh.net', 'ghs.googlehosted.com', 'googlehosted.l.googleusercontent.com', 'isutility.web9.hubspot.com', 'a1049.b.akamai.net', 'plato.mx25.net']

---

如果输入文件包含单行，请使用以下方法：

import json, re

with open("text.txt", "r") as fh:
    domains = []
    # emulating the list of dictionaries
    line = "[" + re.sub(r'\}\s*\{', '},{',fh.read()) + "]"
    l = json.loads(line)
    for d in l:
        domains.append(d["name"])
        # some url domains are located in `value` key for the records which have "type":"cname"
        if (d["type"] == "cname"): domains.append(d["value"])

print(domains)