| from typing import cast |
| from zeroconf import ServiceBrowser, Zeroconf |
| |
| import socket |
| |
| |
| class Discoverer: |
| def __init__(self, listener = None): |
| self.zeroconf = Zeroconf() |
| self.discoveries = {} |
| self.listener = listener |
| browser = ServiceBrowser(self.zeroconf, "_googlemdt._tcp.local.", self) |
| |
| def add_service(self, zeroconf, type, name): |
| info = self.zeroconf.get_service_info(type, name) |
| if info: |
| hostname = info.server.split('.')[0] |
| address = socket.inet_ntoa(cast(bytes, info.address)) |
| self.discoveries[hostname] = address |
| if self.listener and hasattr(self.listener, "add_device"): |
| self.listener.add_device(hostname, address) |
| |
| def remove_service(self, zeroconf, type, name): |
| info = self.zeroconf.get_service_info(type, name) |
| if self.listener and hasattr(self.listener, "remove_device"): |
| self.listener.remove_device(info.server, self.discoveries[info.server]) |
| del(self.discoveries[info.server]) |
