Try to fetch timezone on startup (#70)

hassio/core.py

@@ -20,7 +20,7 @@ from .dock.supervisor import DockerSupervisor
 from .tasks import (
     hassio_update, homeassistant_watchdog, homeassistant_setup,
     api_sessions_cleanup)
-from .tools import get_arch_from_image, get_local_ip
+from .tools import get_arch_from_image, get_local_ip, fetch_timezone
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -60,13 +60,17 @@ class HassIO(object):
         # set api endpoint
         self.config.api_endpoint = await get_local_ip(self.loop)
 
+        # update timezone
+        if self.config.timezone == 'UTC':
+            self.config.timezone = await fetch_timezone(self.websession)
+
         # hostcontrol
         await self.host_control.load()
 
         # schedule update info tasks
         self.scheduler.register_task(
-            self.host_control.load, RUN_UPDATE_INFO_TASKS)
 
+            self.host_control.load, RUN_UPDATE_INFO_TASKS)
         # rest api views
         self.api.register_host(self.host_control)
         self.api.register_network(self.host_control)

hassio/tools.py

@@ -1,5 +1,6 @@
 """Tools file for HassIO."""
 import asyncio
+from contextlib import suppress
 import json
 import logging
 import re
@@ -14,6 +15,8 @@ from .const import URL_HASSIO_VERSION, URL_HASSIO_VERSION_BETA
 
 _LOGGER = logging.getLogger(__name__)
 
+FREEGEOIP_URL = "https://freegeoip.io/json/"
+
 _RE_VERSION = re.compile(r"VERSION=(.*)")
 _IMAGE_ARCH = re.compile(r".*/([a-z0-9]*)-hassio-supervisor")
 
@@ -105,3 +108,15 @@ def validate_timezone(timezone):
                 from None
 
     return timezone
+
+
+async def fetch_timezone(websession):
+    """Read timezone from freegeoip."""
+    data = {}
+    with suppress(aiohttp.ClientError, asyncio.TimeoutError,
+                  json.JSONDecodeError, KeyError):
+        with async_timeout.timeout(10, loop=websession.loop):
+            async with websession.get(FREEGEOIP_URL) as request:
+                data = await request.json()
+
+    return data.get('time_zone', 'UTC')