python zeroconf 显示 IPv4 地址

Question

我想弄清楚如何扫描网络以查找由 avahi 发布的设备。

#!/usr/bin/python3
from zeroconf import ServiceBrowser, Zeroconf
from time import sleep

class MyListener:
    def remove_service(self, zeroconf, type, name):
        print("Service % removed" % (name))

    def add_service(self, zeroconf, type, name):
        info = zeroconf.get_service_info(type, name)
        info = str(info)
        info = info.split(",")[6]
        print(info)


zeroconf = Zeroconf()
listener = MyListener()
browser = ServiceBrowser(zeroconf, "_http._tcp.local.", listener)
try:
        sleep(1)
finally:
        zeroconf.close()

它有效，但它没有给我任何 IPv4 地址。
输出(示例):

ServiceInfo(type='_http._tcp.local.', name='Barco ptp-owsserver-2237._http._tcp.local.', address=b'\n\x80Cj', port=80, weight=0, priority=0, server='ptp-owsserver-2237.local.', properties={b'root': b'/'})

请有人告诉我如何获取 avahi 在我们网络中发布的设备的 IPv4 地址？

Answer 1

要获取 IP 地址，您可以使用属性 address类(class)ServiceInfo .它为您提供了 bytes 中的 IP 地址类型(在您的帖子中，它显示为 b'\n\x80Cj' )，因此您应该使用 socket.inet_ntoa()将其转换为更易读的格式。这是我替换 print() 的代码MyListener.add_service() 中的说明打印IP地址的方法:

from zeroconf import ServiceBrowser, Zeroconf
import socket

class MyListener:

    def remove_service(self, zeroconf, type, name):
        print("Service %s removed" % (name,))

    def add_service(self, zeroconf, type, name):
        info = zeroconf.get_service_info(type, name)
        if info: 
            #print("Service %s added, service info: %s" % (name, info))
            print("Service %s added, IP address: %s" % (name, socket.inet_ntoa(info.address)))


zeroconf = Zeroconf()
listener = MyListener()
browser = ServiceBrowser(zeroconf, "_http._tcp.local.", listener)
try:
    input("Press enter to exit...\n\n")
finally:
    zeroconf.close()