检测域名或端口号

import socket

def check_domain(domain):
    try:
        ip = socket.gethostbyname(domain)
        print(f"Domain {domain} resolved to IP: {ip}")
    except socket.gaierror:
        print(f"Failed to resolve domain {domain}")

check_domain("www.example.com")

import socket

def check_port(host, port):
    try:
        with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
            s.settimeout(2)
            result = s.connect_ex((host, port))
            if result == 0:
                print(f"Port {port} is open on {host}")
            else:
                print(f"Port {port} is closed on {host}")
    except socket.error as e:
        print(f"Error connecting to {host}:{port}: {e}")

check_port("www.example.com", 80)