"""Component to interface with cameras.""" from __future__ import annotations import asyncio import base64 import collections from collections.abc import Awaitable, Callable, Iterable from contextlib import suppress from dataclasses import dataclass from datetime import datetime, timedelta from functools import partial import hashlib import inspect import logging import os from random import SystemRandom from typing import Final, Optional, cast, final from aiohttp import web import async_timeout import attr import voluptuous as vol from homeassistant.components import websocket_api from homeassistant.components.http import KEY_AUTHENTICATED, HomeAssistantView from homeassistant.components.media_player.const import ( ATTR_MEDIA_CONTENT_ID, ATTR_MEDIA_CONTENT_TYPE, DOMAIN as DOMAIN_MP, SERVICE_PLAY_MEDIA, ) from homeassistant.components.stream import Stream, create_stream from homeassistant.components.stream.const import FORMAT_CONTENT_TYPE, OUTPUT_FORMATS from homeassistant.components.websocket_api import ActiveConnection from homeassistant.config_entries import ConfigEntry from homeassistant.const import ( ATTR_ENTITY_ID, CONF_FILENAME, CONTENT_TYPE_MULTIPART, EVENT_HOMEASSISTANT_START, SERVICE_TURN_OFF, SERVICE_TURN_ON, ) from homeassistant.core import Event, HomeAssistant, ServiceCall, callback from homeassistant.exceptions import HomeAssistantError import homeassistant.helpers.config_validation as cv from homeassistant.helpers.config_validation import ( # noqa: F401 PLATFORM_SCHEMA, PLATFORM_SCHEMA_BASE, ) from homeassistant.helpers.entity import Entity, EntityDescription from homeassistant.helpers.entity_component import EntityComponent from homeassistant.helpers.network import get_url from homeassistant.helpers.typing import ConfigType from homeassistant.loader import bind_hass from .const import ( CAMERA_IMAGE_TIMEOUT, CAMERA_STREAM_SOURCE_TIMEOUT, CONF_DURATION, CONF_LOOKBACK, DATA_CAMERA_PREFS, DATA_RTSP_TO_WEB_RTC, DOMAIN, SERVICE_RECORD, STREAM_TYPE_HLS, STREAM_TYPE_WEB_RTC, ) from .img_util import scale_jpeg_camera_image from .prefs import CameraPreferences # mypy: allow-untyped-calls _LOGGER = logging.getLogger(__name__) SERVICE_ENABLE_MOTION: Final = "enable_motion_detection" SERVICE_DISABLE_MOTION: Final = "disable_motion_detection" SERVICE_SNAPSHOT: Final = "snapshot" SERVICE_PLAY_STREAM: Final = "play_stream" SCAN_INTERVAL: Final = timedelta(seconds=30) ENTITY_ID_FORMAT: Final = DOMAIN + ".{}" ATTR_FILENAME: Final = "filename" ATTR_MEDIA_PLAYER: Final = "media_player" ATTR_FORMAT: Final = "format" STATE_RECORDING: Final = "recording" STATE_STREAMING: Final = "streaming" STATE_IDLE: Final = "idle" # Bitfield of features supported by the camera entity SUPPORT_ON_OFF: Final = 1 SUPPORT_STREAM: Final = 2 RTSP_PREFIXES = {"rtsp://", "rtsps://"} DEFAULT_CONTENT_TYPE: Final = "image/jpeg" ENTITY_IMAGE_URL: Final = "/api/camera_proxy/{0}?token={1}" TOKEN_CHANGE_INTERVAL: Final = timedelta(minutes=5) _RND: Final = SystemRandom() MIN_STREAM_INTERVAL: Final = 0.5 # seconds CAMERA_SERVICE_SNAPSHOT: Final = {vol.Required(ATTR_FILENAME): cv.template} CAMERA_SERVICE_PLAY_STREAM: Final = { vol.Required(ATTR_MEDIA_PLAYER): cv.entities_domain(DOMAIN_MP), vol.Optional(ATTR_FORMAT, default="hls"): vol.In(OUTPUT_FORMATS), } CAMERA_SERVICE_RECORD: Final = { vol.Required(CONF_FILENAME): cv.template, vol.Optional(CONF_DURATION, default=30): vol.Coerce(int), vol.Optional(CONF_LOOKBACK, default=0): vol.Coerce(int), } WS_TYPE_CAMERA_THUMBNAIL: Final = "camera_thumbnail" SCHEMA_WS_CAMERA_THUMBNAIL: Final = websocket_api.BASE_COMMAND_MESSAGE_SCHEMA.extend( { vol.Required("type"): WS_TYPE_CAMERA_THUMBNAIL, vol.Required("entity_id"): cv.entity_id, } ) @dataclass class CameraEntityDescription(EntityDescription): """A class that describes camera entities.""" @attr.s class Image: """Represent an image.""" content_type: str = attr.ib() content: bytes = attr.ib() @bind_hass async def async_request_stream(hass: HomeAssistant, entity_id: str, fmt: str) -> str: """Request a stream for a camera entity.""" camera = _get_camera_from_entity_id(hass, entity_id) return await _async_stream_endpoint_url(hass, camera, fmt) async def _async_get_image( camera: Camera, timeout: int = 10, width: int | None = None, height: int | None = None, ) -> Image: """Fetch a snapshot image from a camera. If width and height are passed, an attempt to scale the image will be made on a best effort basis. Not all cameras can scale images or return jpegs that we can scale, however the majority of cases are handled. """ with suppress(asyncio.CancelledError, asyncio.TimeoutError): async with async_timeout.timeout(timeout): # Calling inspect will be removed in 2022.1 after all # custom components have had a chance to change their signature sig = inspect.signature(camera.async_camera_image) if "height" in sig.parameters and "width" in sig.parameters: image_bytes = await camera.async_camera_image( width=width, height=height ) else: camera.async_warn_old_async_camera_image_signature() image_bytes = await camera.async_camera_image() if image_bytes: content_type = camera.content_type image = Image(content_type, image_bytes) if ( width is not None and height is not None and ("jpeg" in content_type or "jpg" in content_type) ): assert width is not None assert height is not None return Image( content_type, scale_jpeg_camera_image(image, width, height) ) return image raise HomeAssistantError("Unable to get image") @bind_hass async def async_get_image( hass: HomeAssistant, entity_id: str, timeout: int = 10, width: int | None = None, height: int | None = None, ) -> Image: """Fetch an image from a camera entity. width and height will be passed to the underlying camera. """ camera = _get_camera_from_entity_id(hass, entity_id) return await _async_get_image(camera, timeout, width, height) @bind_hass async def async_get_stream_source(hass: HomeAssistant, entity_id: str) -> str | None: """Fetch the stream source for a camera entity.""" camera = _get_camera_from_entity_id(hass, entity_id) return await camera.stream_source() @bind_hass async def async_get_mjpeg_stream( hass: HomeAssistant, request: web.Request, entity_id: str ) -> web.StreamResponse | None: """Fetch an mjpeg stream from a camera entity.""" camera = _get_camera_from_entity_id(hass, entity_id) try: stream = await camera.handle_async_mjpeg_stream(request) except ConnectionResetError: stream = None _LOGGER.debug("Error while writing MJPEG stream to transport") return stream async def async_get_still_stream( request: web.Request, image_cb: Callable[[], Awaitable[bytes | None]], content_type: str, interval: float, ) -> web.StreamResponse: """Generate an HTTP MJPEG stream from camera images. This method must be run in the event loop. """ response = web.StreamResponse() response.content_type = CONTENT_TYPE_MULTIPART.format("--frameboundary") await response.prepare(request) async def write_to_mjpeg_stream(img_bytes: bytes) -> None: """Write image to stream.""" await response.write( bytes( "--frameboundary\r\n" "Content-Type: {}\r\n" "Content-Length: {}\r\n\r\n".format(content_type, len(img_bytes)), "utf-8", ) + img_bytes + b"\r\n" ) last_image = None while True: img_bytes = await image_cb() if not img_bytes: break if img_bytes != last_image: await write_to_mjpeg_stream(img_bytes) # Chrome seems to always ignore first picture, # print it twice. if last_image is None: await write_to_mjpeg_stream(img_bytes) last_image = img_bytes await asyncio.sleep(interval) return response def _get_camera_from_entity_id(hass: HomeAssistant, entity_id: str) -> Camera: """Get camera component from entity_id.""" if (component := hass.data.get(DOMAIN)) is None: raise HomeAssistantError("Camera integration not set up") if (camera := component.get_entity(entity_id)) is None: raise HomeAssistantError("Camera not found") if not camera.is_on: raise HomeAssistantError("Camera is off") return cast(Camera, camera) # An RtspToWebRtcProvider accepts these inputs: # stream_source: The RTSP url # offer_sdp: The WebRTC SDP offer # stream_id: A unique id for the stream, used to update an existing source # The output is the SDP answer, or None if the source or offer is not eligible. # The Callable may throw HomeAssistantError on failure. RtspToWebRtcProviderType = Callable[[str, str, str], Awaitable[Optional[str]]] def async_register_rtsp_to_web_rtc_provider( hass: HomeAssistant, domain: str, provider: RtspToWebRtcProviderType, ) -> Callable[[], None]: """Register an RTSP to WebRTC provider. The first provider to satisfy the offer will be used. """ if DOMAIN not in hass.data: raise ValueError("Unexpected state, camera not loaded") def remove_provider() -> None: if domain in hass.data[DATA_RTSP_TO_WEB_RTC]: del hass.data[DATA_RTSP_TO_WEB_RTC] hass.async_create_task(_async_refresh_providers(hass)) hass.data.setdefault(DATA_RTSP_TO_WEB_RTC, {}) hass.data[DATA_RTSP_TO_WEB_RTC][domain] = provider hass.async_create_task(_async_refresh_providers(hass)) return remove_provider async def _async_refresh_providers(hass: HomeAssistant) -> None: """Check all cameras for any state changes for registered providers.""" component: EntityComponent = hass.data[DOMAIN] await asyncio.gather( *( cast(Camera, camera).async_refresh_providers() for camera in component.entities ) ) def _async_get_rtsp_to_web_rtc_providers( hass: HomeAssistant, ) -> Iterable[RtspToWebRtcProviderType]: """Return registered RTSP to WebRTC providers.""" providers: dict[str, RtspToWebRtcProviderType] = hass.data.get( DATA_RTSP_TO_WEB_RTC, {} ) return providers.values() async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool: """Set up the camera component.""" component = hass.data[DOMAIN] = EntityComponent( _LOGGER, DOMAIN, hass, SCAN_INTERVAL ) prefs = CameraPreferences(hass) await prefs.async_initialize() hass.data[DATA_CAMERA_PREFS] = prefs hass.http.register_view(CameraImageView(component)) hass.http.register_view(CameraMjpegStream(component)) websocket_api.async_register_command( hass, WS_TYPE_CAMERA_THUMBNAIL, websocket_camera_thumbnail, SCHEMA_WS_CAMERA_THUMBNAIL, ) websocket_api.async_register_command(hass, ws_camera_stream) websocket_api.async_register_command(hass, ws_camera_web_rtc_offer) websocket_api.async_register_command(hass, websocket_get_prefs) websocket_api.async_register_command(hass, websocket_update_prefs) await component.async_setup(config) async def preload_stream(_event: Event) -> None: for camera in component.entities: camera = cast(Camera, camera) camera_prefs = prefs.get(camera.entity_id) if not camera_prefs.preload_stream: continue stream = await camera.async_create_stream() if not stream: continue stream.keepalive = True stream.add_provider("hls") stream.start() hass.bus.async_listen_once(EVENT_HOMEASSISTANT_START, preload_stream) @callback def update_tokens(time: datetime) -> None: """Update tokens of the entities.""" for entity in component.entities: entity = cast(Camera, entity) entity.async_update_token() entity.async_write_ha_state() hass.helpers.event.async_track_time_interval(update_tokens, TOKEN_CHANGE_INTERVAL) component.async_register_entity_service( SERVICE_ENABLE_MOTION, {}, "async_enable_motion_detection" ) component.async_register_entity_service( SERVICE_DISABLE_MOTION, {}, "async_disable_motion_detection" ) component.async_register_entity_service(SERVICE_TURN_OFF, {}, "async_turn_off") component.async_register_entity_service(SERVICE_TURN_ON, {}, "async_turn_on") component.async_register_entity_service( SERVICE_SNAPSHOT, CAMERA_SERVICE_SNAPSHOT, async_handle_snapshot_service ) component.async_register_entity_service( SERVICE_PLAY_STREAM, CAMERA_SERVICE_PLAY_STREAM, async_handle_play_stream_service, ) component.async_register_entity_service( SERVICE_RECORD, CAMERA_SERVICE_RECORD, async_handle_record_service ) return True async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool: """Set up a config entry.""" component: EntityComponent = hass.data[DOMAIN] return await component.async_setup_entry(entry) async def async_unload_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool: """Unload a config entry.""" component: EntityComponent = hass.data[DOMAIN] return await component.async_unload_entry(entry) class Camera(Entity): """The base class for camera entities.""" # Entity Properties _attr_brand: str | None = None _attr_frame_interval: float = MIN_STREAM_INTERVAL _attr_frontend_stream_type: str | None _attr_is_on: bool = True _attr_is_recording: bool = False _attr_is_streaming: bool = False _attr_model: str | None = None _attr_motion_detection_enabled: bool = False _attr_should_poll: bool = False # No need to poll cameras _attr_state: None = None # State is determined by is_on _attr_supported_features: int = 0 def __init__(self) -> None: """Initialize a camera.""" self.stream: Stream | None = None self.stream_options: dict[str, str] = {} self.content_type: str = DEFAULT_CONTENT_TYPE self.access_tokens: collections.deque = collections.deque([], 2) self._warned_old_signature = False self.async_update_token() self._create_stream_lock: asyncio.Lock | None = None self._rtsp_to_webrtc = False @property def entity_picture(self) -> str: """Return a link to the camera feed as entity picture.""" if self._attr_entity_picture is not None: return self._attr_entity_picture return ENTITY_IMAGE_URL.format(self.entity_id, self.access_tokens[-1]) @property def supported_features(self) -> int: """Flag supported features.""" return self._attr_supported_features @property def is_recording(self) -> bool: """Return true if the device is recording.""" return self._attr_is_recording @property def is_streaming(self) -> bool: """Return true if the device is streaming.""" return self._attr_is_streaming @property def brand(self) -> str | None: """Return the camera brand.""" return self._attr_brand @property def motion_detection_enabled(self) -> bool: """Return the camera motion detection status.""" return self._attr_motion_detection_enabled @property def model(self) -> str | None: """Return the camera model.""" return self._attr_model @property def frame_interval(self) -> float: """Return the interval between frames of the mjpeg stream.""" return self._attr_frame_interval @property def frontend_stream_type(self) -> str | None: """Return the type of stream supported by this camera. A camera may have a single stream type which is used to inform the frontend which camera attributes and player to use. The default type is to use HLS, and components can override to change the type. """ if hasattr(self, "_attr_frontend_stream_type"): return self._attr_frontend_stream_type if not self.supported_features & SUPPORT_STREAM: return None if self._rtsp_to_webrtc: return STREAM_TYPE_WEB_RTC return STREAM_TYPE_HLS @property def available(self) -> bool: """Return True if entity is available.""" if self.stream and not self.stream.available: return self.stream.available return super().available async def async_create_stream(self) -> Stream | None: """Create a Stream for stream_source.""" # There is at most one stream (a decode worker) per camera if not self._create_stream_lock: self._create_stream_lock = asyncio.Lock() async with self._create_stream_lock: if not self.stream: async with async_timeout.timeout(CAMERA_STREAM_SOURCE_TIMEOUT): source = await self.stream_source() if not source: return None self.stream = create_stream( self.hass, source, options=self.stream_options, stream_label=self.entity_id, ) self.stream.set_update_callback(self.async_write_ha_state) return self.stream async def stream_source(self) -> str | None: """Return the source of the stream. This is used by cameras with SUPPORT_STREAM and STREAM_TYPE_HLS. """ # pylint: disable=no-self-use return None async def async_handle_web_rtc_offer(self, offer_sdp: str) -> str | None: """Handle the WebRTC offer and return an answer. This is used by cameras with SUPPORT_STREAM and STREAM_TYPE_WEB_RTC. Integrations can override with a native WebRTC implementation. """ stream_source = await self.stream_source() if not stream_source: return None for provider in _async_get_rtsp_to_web_rtc_providers(self.hass): answer_sdp = await provider(stream_source, offer_sdp, self.entity_id) if answer_sdp: return answer_sdp raise HomeAssistantError("WebRTC offer was not accepted by any providers") def camera_image( self, width: int | None = None, height: int | None = None ) -> bytes | None: """Return bytes of camera image.""" raise NotImplementedError() async def async_camera_image( self, width: int | None = None, height: int | None = None ) -> bytes | None: """Return bytes of camera image.""" sig = inspect.signature(self.camera_image) # Calling inspect will be removed in 2022.1 after all # custom components have had a chance to change their signature if "height" in sig.parameters and "width" in sig.parameters: return await self.hass.async_add_executor_job( partial(self.camera_image, width=width, height=height) ) self.async_warn_old_async_camera_image_signature() return await self.hass.async_add_executor_job(self.camera_image) # Remove in 2022.1 after all custom components have had a chance to change their signature @callback def async_warn_old_async_camera_image_signature(self) -> None: """Warn once when calling async_camera_image with the function old signature.""" if self._warned_old_signature: return _LOGGER.warning( "The camera entity %s does not support requesting width and height, please open an issue with the integration author", self.entity_id, ) self._warned_old_signature = True async def handle_async_still_stream( self, request: web.Request, interval: float ) -> web.StreamResponse: """Generate an HTTP MJPEG stream from camera images.""" return await async_get_still_stream( request, self.async_camera_image, self.content_type, interval ) async def handle_async_mjpeg_stream( self, request: web.Request ) -> web.StreamResponse | None: """Serve an HTTP MJPEG stream from the camera. This method can be overridden by camera platforms to proxy a direct stream from the camera. """ return await self.handle_async_still_stream(request, self.frame_interval) @property @final def state(self) -> str: """Return the camera state.""" if self.is_recording: return STATE_RECORDING if self.is_streaming: return STATE_STREAMING return STATE_IDLE @property def is_on(self) -> bool: """Return true if on.""" return self._attr_is_on def turn_off(self) -> None: """Turn off camera.""" raise NotImplementedError() async def async_turn_off(self) -> None: """Turn off camera.""" await self.hass.async_add_executor_job(self.turn_off) def turn_on(self) -> None: """Turn off camera.""" raise NotImplementedError() async def async_turn_on(self) -> None: """Turn off camera.""" await self.hass.async_add_executor_job(self.turn_on) def enable_motion_detection(self) -> None: """Enable motion detection in the camera.""" raise NotImplementedError() async def async_enable_motion_detection(self) -> None: """Call the job and enable motion detection.""" await self.hass.async_add_executor_job(self.enable_motion_detection) def disable_motion_detection(self) -> None: """Disable motion detection in camera.""" raise NotImplementedError() async def async_disable_motion_detection(self) -> None: """Call the job and disable motion detection.""" await self.hass.async_add_executor_job(self.disable_motion_detection) @final @property def state_attributes(self) -> dict[str, str | None]: """Return the camera state attributes.""" attrs = {"access_token": self.access_tokens[-1]} if self.model: attrs["model_name"] = self.model if self.brand: attrs["brand"] = self.brand if self.motion_detection_enabled: attrs["motion_detection"] = self.motion_detection_enabled if self.frontend_stream_type: attrs["frontend_stream_type"] = self.frontend_stream_type return attrs @callback def async_update_token(self) -> None: """Update the used token.""" self.access_tokens.append( hashlib.sha256(_RND.getrandbits(256).to_bytes(32, "little")).hexdigest() ) async def async_internal_added_to_hass(self) -> None: """Run when entity about to be added to hass.""" await super().async_internal_added_to_hass() await self.async_refresh_providers() async def async_refresh_providers(self) -> None: """Determine if any of the registered providers are suitable for this entity. This affects state attributes, so it should be invoked any time the registered providers or inputs to the state attributes change. Returns True if any state was updated (and needs to be written) """ old_state = self._rtsp_to_webrtc self._rtsp_to_webrtc = await self._async_use_rtsp_to_webrtc() if old_state != self._rtsp_to_webrtc: self.async_write_ha_state() async def _async_use_rtsp_to_webrtc(self) -> bool: """Determine if a WebRTC provider can be used for the camera.""" if not self.supported_features & SUPPORT_STREAM: return False if DATA_RTSP_TO_WEB_RTC not in self.hass.data: return False stream_source = await self.stream_source() return any( stream_source and stream_source.startswith(prefix) for prefix in RTSP_PREFIXES ) class CameraView(HomeAssistantView): """Base CameraView.""" requires_auth = False def __init__(self, component: EntityComponent) -> None: """Initialize a basic camera view.""" self.component = component async def get(self, request: web.Request, entity_id: str) -> web.StreamResponse: """Start a GET request.""" if (camera := self.component.get_entity(entity_id)) is None: raise web.HTTPNotFound() camera = cast(Camera, camera) authenticated = ( request[KEY_AUTHENTICATED] or request.query.get("token") in camera.access_tokens ) if not authenticated: raise web.HTTPUnauthorized() if not camera.is_on: _LOGGER.debug("Camera is off") raise web.HTTPServiceUnavailable() return await self.handle(request, camera) async def handle(self, request: web.Request, camera: Camera) -> web.StreamResponse: """Handle the camera request.""" raise NotImplementedError() class CameraImageView(CameraView): """Camera view to serve an image.""" url = "/api/camera_proxy/{entity_id}" name = "api:camera:image" async def handle(self, request: web.Request, camera: Camera) -> web.Response: """Serve camera image.""" width = request.query.get("width") height = request.query.get("height") try: image = await _async_get_image( camera, CAMERA_IMAGE_TIMEOUT, int(width) if width else None, int(height) if height else None, ) except (HomeAssistantError, ValueError) as ex: raise web.HTTPInternalServerError() from ex else: return web.Response(body=image.content, content_type=image.content_type) class CameraMjpegStream(CameraView): """Camera View to serve an MJPEG stream.""" url = "/api/camera_proxy_stream/{entity_id}" name = "api:camera:stream" async def handle(self, request: web.Request, camera: Camera) -> web.StreamResponse: """Serve camera stream, possibly with interval.""" if (interval_str := request.query.get("interval")) is None: try: stream = await camera.handle_async_mjpeg_stream(request) except ConnectionResetError: stream = None _LOGGER.debug("Error while writing MJPEG stream to transport") if stream is None: raise web.HTTPBadGateway() return stream try: # Compose camera stream from stills interval = float(interval_str) if interval < MIN_STREAM_INTERVAL: raise ValueError(f"Stream interval must be be > {MIN_STREAM_INTERVAL}") return await camera.handle_async_still_stream(request, interval) except ValueError as err: raise web.HTTPBadRequest() from err @websocket_api.async_response async def websocket_camera_thumbnail( hass: HomeAssistant, connection: ActiveConnection, msg: dict ) -> None: """Handle get camera thumbnail websocket command. Async friendly. """ _LOGGER.warning("The websocket command 'camera_thumbnail' has been deprecated") try: image = await async_get_image(hass, msg["entity_id"]) await connection.send_big_result( msg["id"], { "content_type": image.content_type, "content": base64.b64encode(image.content).decode("utf-8"), }, ) except HomeAssistantError: connection.send_message( websocket_api.error_message( msg["id"], "image_fetch_failed", "Unable to fetch image" ) ) @websocket_api.websocket_command( { vol.Required("type"): "camera/stream", vol.Required("entity_id"): cv.entity_id, vol.Optional("format", default="hls"): vol.In(OUTPUT_FORMATS), } ) @websocket_api.async_response async def ws_camera_stream( hass: HomeAssistant, connection: ActiveConnection, msg: dict ) -> None: """Handle get camera stream websocket command. Async friendly. """ try: entity_id = msg["entity_id"] camera = _get_camera_from_entity_id(hass, entity_id) url = await _async_stream_endpoint_url(hass, camera, fmt=msg["format"]) connection.send_result(msg["id"], {"url": url}) except HomeAssistantError as ex: _LOGGER.error("Error requesting stream: %s", ex) connection.send_error(msg["id"], "start_stream_failed", str(ex)) except asyncio.TimeoutError: _LOGGER.error("Timeout getting stream source") connection.send_error( msg["id"], "start_stream_failed", "Timeout getting stream source" ) @websocket_api.websocket_command( { vol.Required("type"): "camera/web_rtc_offer", vol.Required("entity_id"): cv.entity_id, vol.Required("offer"): str, } ) @websocket_api.async_response async def ws_camera_web_rtc_offer( hass: HomeAssistant, connection: ActiveConnection, msg: dict ) -> None: """Handle the signal path for a WebRTC stream. This signal path is used to route the offer created by the client to the camera device through the integration for negotiation on initial setup, which returns an answer. The actual streaming is handled entirely between the client and camera device. Async friendly. """ entity_id = msg["entity_id"] offer = msg["offer"] camera = _get_camera_from_entity_id(hass, entity_id) if camera.frontend_stream_type != STREAM_TYPE_WEB_RTC: connection.send_error( msg["id"], "web_rtc_offer_failed", f"Camera does not support WebRTC, frontend_stream_type={camera.frontend_stream_type}", ) return try: answer = await camera.async_handle_web_rtc_offer(offer) except (HomeAssistantError, ValueError) as ex: _LOGGER.error("Error handling WebRTC offer: %s", ex) connection.send_error(msg["id"], "web_rtc_offer_failed", str(ex)) except asyncio.TimeoutError: _LOGGER.error("Timeout handling WebRTC offer") connection.send_error( msg["id"], "web_rtc_offer_failed", "Timeout handling WebRTC offer" ) else: connection.send_result(msg["id"], {"answer": answer}) @websocket_api.websocket_command( {vol.Required("type"): "camera/get_prefs", vol.Required("entity_id"): cv.entity_id} ) @websocket_api.async_response async def websocket_get_prefs( hass: HomeAssistant, connection: ActiveConnection, msg: dict ) -> None: """Handle request for account info.""" prefs = hass.data[DATA_CAMERA_PREFS].get(msg["entity_id"]) connection.send_result(msg["id"], prefs.as_dict()) @websocket_api.websocket_command( { vol.Required("type"): "camera/update_prefs", vol.Required("entity_id"): cv.entity_id, vol.Optional("preload_stream"): bool, } ) @websocket_api.async_response async def websocket_update_prefs( hass: HomeAssistant, connection: ActiveConnection, msg: dict ) -> None: """Handle request for account info.""" prefs = hass.data[DATA_CAMERA_PREFS] changes = dict(msg) changes.pop("id") changes.pop("type") entity_id = changes.pop("entity_id") await prefs.async_update(entity_id, **changes) connection.send_result(msg["id"], prefs.get(entity_id).as_dict()) async def async_handle_snapshot_service( camera: Camera, service_call: ServiceCall ) -> None: """Handle snapshot services calls.""" hass = camera.hass filename = service_call.data[ATTR_FILENAME] filename.hass = hass snapshot_file = filename.async_render(variables={ATTR_ENTITY_ID: camera}) # check if we allow to access to that file if not hass.config.is_allowed_path(snapshot_file): _LOGGER.error("Can't write %s, no access to path!", snapshot_file) return image = await camera.async_camera_image() if image is None: return def _write_image(to_file: str, image_data: bytes) -> None: """Executor helper to write image.""" os.makedirs(os.path.dirname(to_file), exist_ok=True) with open(to_file, "wb") as img_file: img_file.write(image_data) try: await hass.async_add_executor_job(_write_image, snapshot_file, image) except OSError as err: _LOGGER.error("Can't write image to file: %s", err) async def async_handle_play_stream_service( camera: Camera, service_call: ServiceCall ) -> None: """Handle play stream services calls.""" hass = camera.hass fmt = service_call.data[ATTR_FORMAT] url = await _async_stream_endpoint_url(camera.hass, camera, fmt) url = f"{get_url(hass)}{url}" await hass.services.async_call( DOMAIN_MP, SERVICE_PLAY_MEDIA, { ATTR_ENTITY_ID: service_call.data[ATTR_MEDIA_PLAYER], ATTR_MEDIA_CONTENT_ID: url, ATTR_MEDIA_CONTENT_TYPE: FORMAT_CONTENT_TYPE[fmt], }, blocking=True, context=service_call.context, ) async def _async_stream_endpoint_url( hass: HomeAssistant, camera: Camera, fmt: str ) -> str: stream = await camera.async_create_stream() if not stream: raise HomeAssistantError( f"{camera.entity_id} does not support play stream service" ) # Update keepalive setting which manages idle shutdown camera_prefs = hass.data[DATA_CAMERA_PREFS].get(camera.entity_id) stream.keepalive = camera_prefs.preload_stream stream.add_provider(fmt) stream.start() return stream.endpoint_url(fmt) async def async_handle_record_service( camera: Camera, service_call: ServiceCall ) -> None: """Handle stream recording service calls.""" stream = await camera.async_create_stream() if not stream: raise HomeAssistantError(f"{camera.entity_id} does not support record service") hass = camera.hass filename = service_call.data[CONF_FILENAME] filename.hass = hass video_path = filename.async_render(variables={ATTR_ENTITY_ID: camera}) await stream.async_record( video_path, duration=service_call.data[CONF_DURATION], lookback=service_call.data[CONF_LOOKBACK], )