144 lines
3.9 KiB
Python
144 lines
3.9 KiB
Python
"""HTTP Support for Hass.io."""
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import asyncio
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import logging
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import os
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import re
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from typing import Dict, Union
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import aiohttp
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from aiohttp import web
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from aiohttp.hdrs import CONTENT_TYPE, CONTENT_LENGTH
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from aiohttp.web_exceptions import HTTPBadGateway
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import async_timeout
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from homeassistant.components.http import KEY_AUTHENTICATED, HomeAssistantView
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from .const import X_HASS_IS_ADMIN, X_HASS_USER_ID, X_HASSIO
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_LOGGER = logging.getLogger(__name__)
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NO_TIMEOUT = re.compile(
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r'^(?:'
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r'|homeassistant/update'
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r'|hassos/update'
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r'|hassos/update/cli'
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r'|supervisor/update'
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r'|addons/[^/]+/(?:update|install|rebuild)'
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r'|snapshots/.+/full'
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r'|snapshots/.+/partial'
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r'|snapshots/[^/]+/(?:upload|download)'
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r')$'
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)
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NO_AUTH = re.compile(
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r'^(?:'
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r'|app/.*'
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r'|addons/[^/]+/logo'
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r')$'
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)
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class HassIOView(HomeAssistantView):
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"""Hass.io view to handle base part."""
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name = "api:hassio"
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url = "/api/hassio/{path:.+}"
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requires_auth = False
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def __init__(self, host: str, websession: aiohttp.ClientSession):
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"""Initialize a Hass.io base view."""
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self._host = host
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self._websession = websession
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async def _handle(
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self, request: web.Request, path: str
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) -> Union[web.Response, web.StreamResponse]:
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"""Route data to Hass.io."""
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if _need_auth(path) and not request[KEY_AUTHENTICATED]:
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return web.Response(status=401)
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return await self._command_proxy(path, request)
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get = _handle
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post = _handle
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async def _command_proxy(
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self, path: str, request: web.Request
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) -> Union[web.Response, web.StreamResponse]:
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"""Return a client request with proxy origin for Hass.io supervisor.
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This method is a coroutine.
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"""
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read_timeout = _get_timeout(path)
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data = None
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headers = _init_header(request)
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try:
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with async_timeout.timeout(10):
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data = await request.read()
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method = getattr(self._websession, request.method.lower())
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client = await method(
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"http://{}/{}".format(self._host, path), data=data,
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headers=headers, timeout=read_timeout
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)
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# Simple request
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if int(client.headers.get(CONTENT_LENGTH, 0)) < 4194000:
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# Return Response
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body = await client.read()
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return web.Response(
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content_type=client.content_type,
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status=client.status,
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body=body,
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)
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# Stream response
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response = web.StreamResponse(status=client.status)
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response.content_type = client.content_type
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await response.prepare(request)
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async for data in client.content.iter_chunked(4096):
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await response.write(data)
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return response
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except aiohttp.ClientError as err:
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_LOGGER.error("Client error on api %s request %s", path, err)
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except asyncio.TimeoutError:
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_LOGGER.error("Client timeout error on API request %s", path)
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raise HTTPBadGateway()
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def _init_header(request: web.Request) -> Dict[str, str]:
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"""Create initial header."""
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headers = {
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X_HASSIO: os.environ.get('HASSIO_TOKEN', ""),
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CONTENT_TYPE: request.content_type,
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}
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# Add user data
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user = request.get('hass_user')
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if user is not None:
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headers[X_HASS_USER_ID] = request['hass_user'].id
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headers[X_HASS_IS_ADMIN] = str(int(request['hass_user'].is_admin))
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return headers
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def _get_timeout(path: str) -> int:
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"""Return timeout for a URL path."""
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if NO_TIMEOUT.match(path):
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return 0
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return 300
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def _need_auth(path: str) -> bool:
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"""Return if a path need authentication."""
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if NO_AUTH.match(path):
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return False
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return True
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