jamesjammy061

python 代码如下
```py
#!/usr/bin/env python3

from zeroconf import ServiceBrowser, Zeroconf
import time
import socket
from typing import List, Dict, Optional

class MDNSListener:
def __init__(self):
self.services: Dict[str, Dict] = {}

def remove_service(self, zeroconf: Zeroconf, type_: str, name: str) -> None:
print(f"服务被移除: {name}")
if name in self.services:
del self.services[name]

def add_service(self, zeroconf: Zeroconf, type_: str, name: str) -> None:
info = zeroconf.get_service_info(type_, name)
if info:
addresses = [socket.inet_ntoa(addr) for addr in info.addresses]
self.services[name] = {
'name': name,
'type': type_,
'addresses': addresses,
'port': info.port,
'server': info.server,
'properties': info.properties
}
print(f"发现新服务: {name}")
print(f" 地址: {', '.join(addresses)}")
print(f" 端口: {info.port}")
print(f" 服务器: {info.server}")

def update_service(self, zeroconf: Zeroconf, type_: str, name: str) -> None:
print(f"服务更新: {name}")
self.add_service(zeroconf, type_, name)

def discover_services(duration: int = 5) -> Dict[str, Dict]:
"""发现本地网络中的所有 mDNS 服务"""
zeroconf = Zeroconf()
listener = MDNSListener()

# 常见的服务类型
service_types = [
# "_http._tcp.local.",
# "_https._tcp.local.",
# "_workstation._tcp.local.",
# "_printer._tcp.local.",
# "_ipp._tcp.local.",
# "_airplay._tcp.local.",
# "_spotify-connect._tcp.local.",
# "_googlecast._tcp.local.",
# "_googlecast._tcp.local.",
"_mi-connect._udp.local.",
"_lyra-mdns._udp.local.",
]

browsers = [ServiceBrowser(zeroconf, service_type, listener)
for service_type in service_types]

try:
print(f"正在扫描 mDNS 服务，持续{duration}秒...")
time.sleep(duration)
finally:
zeroconf.close()

return listener.services

def query_service_details(service_name: str, service_type: str) -> Optional[Dict]:
"""查询特定服务的详细信息"""
zeroconf = Zeroconf()
try:
info = zeroconf.get_service_info(service_type, service_name)
if info:
addresses = [socket.inet_ntoa(addr) for addr in info.addresses]
return {
'name': service_name,
'type': service_type,
'addresses': addresses,
'port': info.port,
'server': info.server,
'properties': {k.decode(): v.decode() if isinstance(v, bytes) else v
for k, v in info.properties.items()}
}
finally:
zeroconf.close()
return None

def main():
# 1. 发现所有服务
print("开始扫描本地网络中的 mDNS 服务...")
services = discover_services(10) # 扫描 10 秒

# 2. 显示所有发现的服务
print("\n 发现的所有服务:")
for name, service in services.items():
print(f"\n 服务名称: {name}")
print(f"服务类型: {service['type']}")
print(f"IP 地址: {', '.join(service['addresses'])}")
print(f"端口: {service['port']}")
print(f"服务器: {service['server']}")

# 3. 如果发现了服务，查询第一个服务的详细信息
if services:
first_service = next(iter(services.items()))
name, service = first_service
print(f"\n 获取服务 '{name}' 的详细信息:")
details = query_service_details(name, service['type'])
if details:
print("详细信息:")
print(f"属性: {details['properties']}")
else:
print("无法获取详细信息")
else:
print("\n 未发现任何服务")

if __name__ == "__main__":
main()
```

响应结果

```
❯ python mdns_discovery.py
开始扫描本地网络中的 mDNS 服务...
正在扫描 mDNS 服务，持续 10 秒...
发现新服务: 3F2E52BE._lyra-mdns._udp.local.
地址: 192.168.136.46
端口: 5353
服务器: 3F2E52BE.local.
服务更新: 3F2E52BE._lyra-mdns._udp.local.
发现新服务: 3F2E52BE._lyra-mdns._udp.local.
地址: 192.168.136.46
端口: 5353
服务器: 3F2E52BE.local.

发现的所有服务:

服务名称: 3F2E52BE._lyra-mdns._udp.local.
服务类型: _lyra-mdns._udp.local.
IP 地址: 192.168.136.46
端口: 5353
服务器: 3F2E52BE.local.

获取服务 '3F2E52BE._lyra-mdns._udp.local.' 的详细信息:
详细信息:
属性: {'AppData': 'AkEBPy5Svug7AAIBDwoDAYNPAQEgAhlNYXR0aGV3IFBlcmV655qEUmVkbWkgSzUwIwAjAr+Q', 'MediumType': '64', 'DebugInfo': '{msg:reply, ifname:ap0, v4:192.$)+.$&).46, v6:fe80::&#<+:($@@:@?$*:4903}'}

```