python获取网址域名

from urllib.parse import urlparse

def get_domain(url):
    parsed_url = urlparse(url)
    domain = parsed_url.netloc
    return domain

# 示例URL
url = "https://www.example.com/path/to/resource?query=param"
domain = get_domain(url)
print("Domain:", domain)

import re

def is_valid_url(url):
    regex = re.compile(
        r'^(?:http|ftp)s?://'  # http:// or https://
        r'(?:(?:[A-Z0-9](?:[A-Z0-9-]{0,61}[A-Z0-9])?\.)+(?:[A-Z]{2,6}\.?|[A-Z0-9-]{2,}\.?)|'  # domain...
        r'localhost|'  # localhost...
        r'\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})'  # ...or ip
        r'(?::\d+)?'  # optional port
        r'(?:/?|[/?]\S+)$', re.IGNORECASE)
    return re.match(regex, url) is not None

url = "https://www.example.com/path/to/resource?query=param"
if is_valid_url(url):
    domain = get_domain(url)
    print("Domain:", domain)
else:
    print("Invalid URL")

import idna

def get_domain_with_idna(url):
    parsed_url = urlparse(url)
    domain = parsed_url.netloc
    try:
        domain = idna.encode(domain).decode('utf-8')
    except UnicodeError:
        pass
    return domain

url = "https://例子.测试"
domain = get_domain_with_idna(url)
print("Domain:", domain)