"""
This module exposes Home Assistant via Zeroconf.

Zeroconf is also known as Bonjour, Avahi or Multicast DNS (mDNS).

For more details about Zeroconf, please refer to the documentation at
https://home-assistant.io/components/zeroconf/
"""
import logging
import socket

from homeassistant.const import (EVENT_HOMEASSISTANT_STOP, __version__)

REQUIREMENTS = ["zeroconf==0.17.5"]

_LOGGER = logging.getLogger(__name__)

DOMAIN = "zeroconf"

ZEROCONF_TYPE = "_home-assistant._tcp.local."

DEPENDENCIES = ["http"]


def setup(hass, config):
    """Set up Zeroconf and make Home Assistant discoverable."""
    from zeroconf import Zeroconf, ServiceInfo

    zeroconf = Zeroconf()

    zeroconf_name = "{}.{}".format(hass.config.location_name,
                                   ZEROCONF_TYPE)

    params = {"version": __version__, "base_url": hass.http.base_url,
              "needs_auth": (hass.http.api_password != "")}

    info = ServiceInfo(ZEROCONF_TYPE, zeroconf_name,
                       socket.inet_aton(hass.http.routable_address),
                       hass.http.server_address[1], 0, 0, params)

    zeroconf.register_service(info)

    def stop_zeroconf(event):
        """Stop Zeroconf."""
        zeroconf.unregister_service(info)

    hass.bus.listen_once(EVENT_HOMEASSISTANT_STOP, stop_zeroconf)

    return True

"""
This module exposes Home Assistant via Zeroconf.

Zeroconf is also known as Bonjour, Avahi or Multicast DNS (mDNS).

For more details about Zeroconf, please refer to the documentation at
https://home-assistant.io/components/zeroconf/
"""
import logging
import socket

from homeassistant.const import (EVENT_HOMEASSISTANT_STOP, __version__)

REQUIREMENTS = ["zeroconf==0.17.5"]

DEPENDENCIES = ["api"]

_LOGGER = logging.getLogger(__name__)

DOMAIN = "zeroconf"

ZEROCONF_TYPE = "_home-assistant._tcp.local."


def setup(hass, config):
    """Set up Zeroconf and make Home Assistant discoverable."""
    from zeroconf import Zeroconf, ServiceInfo

    zeroconf = Zeroconf()

    zeroconf_name = "{}.{}".format(hass.config.location_name,
                                   ZEROCONF_TYPE)

    params = {"version": __version__, "base_url": hass.config.api.base_url,
              "needs_auth": (hass.config.api.api_password != "")}

    info = ServiceInfo(ZEROCONF_TYPE, zeroconf_name,
                       socket.inet_aton(hass.config.api.host),
                       hass.config.api.port, 0, 0, params)

    zeroconf.register_service(info)

    def stop_zeroconf(event):
        """Stop Zeroconf."""
        zeroconf.unregister_service(info)

    hass.bus.listen_once(EVENT_HOMEASSISTANT_STOP, stop_zeroconf)

    return True

Use hass.config.api instead of hass.http