#!/usr/bin/env python3

""" Example of browsing for a service (in this case, HTTP) """

import argparse

import logging

import socket

from time import sleep

from typing import cast

from zeroconf import IPVersion, ServiceBrowser, ServiceStateChange, Zeroconf

def on_service_state_change(

zeroconf: Zeroconf, service_type: str, name: str, state_change: ServiceStateChange

) -> None:

print("Service %s of type %s state changed: %s" % (name, service_type, state_change))

if state_change is ServiceStateChange.Added:

info = zeroconf.get_service_info(service_type, name)

if info:

addresses = ["%s:%d" % (socket.inet_ntoa(addr), cast(int, info.port)) for addr in info.addresses]

print(" Addresses: %s" % ", ".join(addresses))

print(" Weight: %d, priority: %d" % (info.weight, info.priority))

print(" Server: %s" % (info.server,))

if info.properties:

print(" Properties are:")

for key, value in info.properties.items():

print(" %s: %s" % (key, value))

else:

print(" No properties")

else:

print(" No info")

print('\n')

if __name__ == '__main__':

logging.basicConfig(level=logging.DEBUG)

parser = argparse.ArgumentParser()

parser.add_argument('--debug', action='store_true')

version_group = parser.add_mutually_exclusive_group()

version_group.add_argument('--v6', action='store_true')

version_group.add_argument('--v6-only', action='store_true')

args = parser.parse_args()

if args.debug:

logging.getLogger('zeroconf').setLevel(logging.DEBUG)

if args.v6:

ip_version = IPVersion.All

elif args.v6_only:

ip_version = IPVersion.V6Only

else:

ip_version = IPVersion.V4Only

zeroconf = Zeroconf(ip_version=ip_version)

print("\nBrowsing services, press Ctrl-C to exit...\n")

browser = ServiceBrowser(zeroconf, "_http._tcp.local.", handlers=[on_service_state_change])

try:

while True:

sleep(0.1)

except KeyboardInterrupt:

pass

finally:

zeroconf.close()