70 lines
2.4 KiB
Python
70 lines
2.4 KiB
Python
"""The SSDP integration."""
|
|
from __future__ import annotations
|
|
|
|
import asyncio
|
|
import logging
|
|
|
|
import aiohttp
|
|
from defusedxml import ElementTree
|
|
|
|
from homeassistant.core import HomeAssistant, callback
|
|
|
|
from .util import etree_to_dict
|
|
|
|
_LOGGER = logging.getLogger(__name__)
|
|
|
|
|
|
class DescriptionManager:
|
|
"""Class to cache and manage fetching descriptions."""
|
|
|
|
def __init__(self, hass: HomeAssistant) -> None:
|
|
"""Init the manager."""
|
|
self.hass = hass
|
|
self._description_cache: dict[str, None | dict[str, str]] = {}
|
|
|
|
async def fetch_description(
|
|
self, xml_location: str | None
|
|
) -> None | dict[str, str]:
|
|
"""Fetch the location or get it from the cache."""
|
|
if xml_location is None:
|
|
return None
|
|
if xml_location not in self._description_cache:
|
|
try:
|
|
self._description_cache[xml_location] = await self._fetch_description(
|
|
xml_location
|
|
)
|
|
except Exception: # pylint: disable=broad-except
|
|
# If it fails, cache the failure so we do not keep trying over and over
|
|
self._description_cache[xml_location] = None
|
|
_LOGGER.exception("Failed to fetch ssdp data from: %s", xml_location)
|
|
|
|
return self._description_cache[xml_location]
|
|
|
|
@callback
|
|
def async_cached_description(self, xml_location: str) -> None | dict[str, str]:
|
|
"""Fetch the description from the cache."""
|
|
return self._description_cache.get(xml_location)
|
|
|
|
async def _fetch_description(self, xml_location: str) -> None | dict[str, str]:
|
|
"""Fetch an XML description."""
|
|
session = self.hass.helpers.aiohttp_client.async_get_clientsession()
|
|
try:
|
|
for _ in range(2):
|
|
resp = await session.get(xml_location, timeout=5)
|
|
# Samsung Smart TV sometimes returns an empty document the
|
|
# first time. Retry once.
|
|
if xml := await resp.text(errors="replace"):
|
|
break
|
|
except (aiohttp.ClientError, asyncio.TimeoutError) as err:
|
|
_LOGGER.debug("Error fetching %s: %s", xml_location, err)
|
|
return None
|
|
|
|
try:
|
|
tree = ElementTree.fromstring(xml)
|
|
except ElementTree.ParseError as err:
|
|
_LOGGER.debug("Error parsing %s: %s", xml_location, err)
|
|
return None
|
|
|
|
root = etree_to_dict(tree).get("root") or {}
|
|
return root.get("device") or {}
|