132 lines
4.2 KiB
Python
132 lines
4.2 KiB
Python
"""Connection session."""
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import asyncio
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from typing import Any, Callable, Dict, Hashable, Optional
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import voluptuous as vol
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from homeassistant.core import Context, callback
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from homeassistant.exceptions import HomeAssistantError, Unauthorized
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from . import const, messages
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# mypy: allow-untyped-calls, allow-untyped-defs
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class ActiveConnection:
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"""Handle an active websocket client connection."""
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def __init__(self, logger, hass, send_message, user, refresh_token):
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"""Initialize an active connection."""
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self.logger = logger
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self.hass = hass
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self.send_message = send_message
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self.user = user
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if refresh_token:
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self.refresh_token_id = refresh_token.id
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else:
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self.refresh_token_id = None
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self.subscriptions: Dict[Hashable, Callable[[], Any]] = {}
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self.last_id = 0
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def context(self, msg):
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"""Return a context."""
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user = self.user
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if user is None:
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return Context()
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return Context(user_id=user.id)
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@callback
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def send_result(self, msg_id: int, result: Optional[Any] = None) -> None:
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"""Send a result message."""
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self.send_message(messages.result_message(msg_id, result))
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async def send_big_result(self, msg_id, result):
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"""Send a result message that would be expensive to JSON serialize."""
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content = await self.hass.async_add_executor_job(
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const.JSON_DUMP, messages.result_message(msg_id, result)
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)
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self.send_message(content)
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@callback
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def send_error(self, msg_id: int, code: str, message: str) -> None:
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"""Send a error message."""
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self.send_message(messages.error_message(msg_id, code, message))
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@callback
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def async_handle(self, msg):
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"""Handle a single incoming message."""
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handlers = self.hass.data[const.DOMAIN]
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try:
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msg = messages.MINIMAL_MESSAGE_SCHEMA(msg)
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cur_id = msg["id"]
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except vol.Invalid:
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self.logger.error("Received invalid command", msg)
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self.send_message(
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messages.error_message(
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msg.get("id"),
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const.ERR_INVALID_FORMAT,
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"Message incorrectly formatted.",
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)
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)
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return
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if cur_id <= self.last_id:
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self.send_message(
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messages.error_message(
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cur_id, const.ERR_ID_REUSE, "Identifier values have to increase."
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)
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)
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return
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if msg["type"] not in handlers:
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self.logger.error("Received invalid command: {}".format(msg["type"]))
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self.send_message(
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messages.error_message(
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cur_id, const.ERR_UNKNOWN_COMMAND, "Unknown command."
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)
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)
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return
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handler, schema = handlers[msg["type"]]
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try:
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handler(self.hass, self, schema(msg))
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except Exception as err: # pylint: disable=broad-except
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self.async_handle_exception(msg, err)
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self.last_id = cur_id
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@callback
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def async_close(self):
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"""Close down connection."""
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for unsub in self.subscriptions.values():
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unsub()
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@callback
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def async_handle_exception(self, msg, err):
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"""Handle an exception while processing a handler."""
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log_handler = self.logger.error
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if isinstance(err, Unauthorized):
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code = const.ERR_UNAUTHORIZED
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err_message = "Unauthorized"
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elif isinstance(err, vol.Invalid):
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code = const.ERR_INVALID_FORMAT
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err_message = vol.humanize.humanize_error(msg, err)
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elif isinstance(err, asyncio.TimeoutError):
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code = const.ERR_TIMEOUT
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err_message = "Timeout"
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elif isinstance(err, HomeAssistantError):
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code = const.ERR_UNKNOWN_ERROR
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err_message = str(err)
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else:
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code = const.ERR_UNKNOWN_ERROR
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err_message = "Unknown error"
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log_handler = self.logger.exception
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log_handler("Error handling message: %s", err_message)
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self.send_message(messages.error_message(msg["id"], code, err_message))
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