#!/usr/bin/python3
import dns.resolver
import http.client
import socket
iplist = [] # 定义域名IP列表
appdomain = "www.google.hk" # 定义业务域名
def get_iplist(domain=""): # 域名解析函数
try:
A = dns.resolver.resolve(domain, 'A') # A记录解析类型
print("DNS query result:", A) # 打印 DNS 查询结果
except Exception as e:
print("DNS resolver error: " + str(e))
return False
# 检查解析结果是否为空
if not A.response.answer:
print("No A records found for domain:", domain)
return False
for i in A.response.answer:
for j in i.items:
if j.rdtype == dns.rdatatype.A: # 检查记录类型是否为A记录
print("Found IP address:", j.address) # 打印找到的 IP 地址
iplist.append(j.address) # 追加
return True
def check_ip(ip):
check_ip = ip
getcontent = ""
conn = None
try:
conn = http.client.HTTPConnection(check_ip, 80, timeout=5) # 创建HTTP连接对象
conn.request("GET", "/", headers={"Host": appdomain}) # 发起URL请求，并添加主机头
r = conn.getresponse()
getcontent = r.read(15) # 获取URL页面的前15个字符，方便做可用性检测
except socket.timeout:
print(ip + " [Timeout]")
except Exception as e:
print(ip + " [Error]: " + str(e))
finally:
if conn:
conn.close()
if getcontent == b"<!doctype html>": # 检查响应内容
print(ip + " [OK]")
else:
print(ip + " [Error]")
if __name__ == "__main__":
if get_iplist(appdomain) and len(iplist) > 0: # 条件：域名正确解析并至少正确返回一个IP
for ip in iplist:
check_ip(ip)
else:
print("DNS resolver error")
结果
DNS query result: <dns.resolver.Answer object at 0x00000203B6B31CD0>
Found IP address: 173.194.202.199
173.194.202.199 [Timeout]
173.194.202.199 [Error]
