673 lines
21 KiB
Python
673 lines
21 KiB
Python
"""Component to interface with cameras."""
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import asyncio
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import base64
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import collections
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from contextlib import suppress
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from datetime import timedelta
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import logging
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import hashlib
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from random import SystemRandom
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import attr
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from aiohttp import web
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import async_timeout
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import voluptuous as vol
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from homeassistant.core import callback
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from homeassistant.const import ATTR_ENTITY_ID, SERVICE_TURN_OFF, \
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SERVICE_TURN_ON, EVENT_HOMEASSISTANT_START, CONF_FILENAME
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from homeassistant.exceptions import HomeAssistantError
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from homeassistant.loader import bind_hass
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from homeassistant.helpers.entity import Entity
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from homeassistant.helpers.entity_component import EntityComponent
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from homeassistant.helpers.config_validation import ( # noqa
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PLATFORM_SCHEMA, PLATFORM_SCHEMA_BASE)
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from homeassistant.components.http import HomeAssistantView, KEY_AUTHENTICATED
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from homeassistant.components.media_player.const import (
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ATTR_MEDIA_CONTENT_ID, ATTR_MEDIA_CONTENT_TYPE,
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SERVICE_PLAY_MEDIA, DOMAIN as DOMAIN_MP)
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from homeassistant.components.stream import request_stream
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from homeassistant.components.stream.const import (
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OUTPUT_FORMATS, FORMAT_CONTENT_TYPE, CONF_STREAM_SOURCE, CONF_LOOKBACK,
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CONF_DURATION, SERVICE_RECORD, DOMAIN as DOMAIN_STREAM)
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from homeassistant.components import websocket_api
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import homeassistant.helpers.config_validation as cv
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from .const import DOMAIN, DATA_CAMERA_PREFS
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from .prefs import CameraPreferences
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DEPENDENCIES = ['http']
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_LOGGER = logging.getLogger(__name__)
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SERVICE_ENABLE_MOTION = 'enable_motion_detection'
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SERVICE_DISABLE_MOTION = 'disable_motion_detection'
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SERVICE_SNAPSHOT = 'snapshot'
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SERVICE_PLAY_STREAM = 'play_stream'
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SCAN_INTERVAL = timedelta(seconds=30)
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ENTITY_ID_FORMAT = DOMAIN + '.{}'
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ATTR_FILENAME = 'filename'
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ATTR_MEDIA_PLAYER = 'media_player'
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ATTR_FORMAT = 'format'
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STATE_RECORDING = 'recording'
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STATE_STREAMING = 'streaming'
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STATE_IDLE = 'idle'
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# Bitfield of features supported by the camera entity
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SUPPORT_ON_OFF = 1
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SUPPORT_STREAM = 2
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DEFAULT_CONTENT_TYPE = 'image/jpeg'
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ENTITY_IMAGE_URL = '/api/camera_proxy/{0}?token={1}'
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TOKEN_CHANGE_INTERVAL = timedelta(minutes=5)
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_RND = SystemRandom()
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MIN_STREAM_INTERVAL = 0.5 # seconds
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CAMERA_SERVICE_SCHEMA = vol.Schema({
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vol.Optional(ATTR_ENTITY_ID): cv.comp_entity_ids,
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})
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CAMERA_SERVICE_SNAPSHOT = CAMERA_SERVICE_SCHEMA.extend({
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vol.Required(ATTR_FILENAME): cv.template
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})
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CAMERA_SERVICE_PLAY_STREAM = CAMERA_SERVICE_SCHEMA.extend({
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vol.Required(ATTR_MEDIA_PLAYER): cv.entities_domain(DOMAIN_MP),
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vol.Optional(ATTR_FORMAT, default='hls'): vol.In(OUTPUT_FORMATS),
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})
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CAMERA_SERVICE_RECORD = CAMERA_SERVICE_SCHEMA.extend({
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vol.Required(CONF_FILENAME): cv.template,
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vol.Optional(CONF_DURATION, default=30): vol.Coerce(int),
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vol.Optional(CONF_LOOKBACK, default=0): vol.Coerce(int),
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})
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WS_TYPE_CAMERA_THUMBNAIL = 'camera_thumbnail'
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SCHEMA_WS_CAMERA_THUMBNAIL = websocket_api.BASE_COMMAND_MESSAGE_SCHEMA.extend({
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vol.Required('type'): WS_TYPE_CAMERA_THUMBNAIL,
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vol.Required('entity_id'): cv.entity_id
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})
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@attr.s
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class Image:
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"""Represent an image."""
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content_type = attr.ib(type=str)
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content = attr.ib(type=bytes)
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@bind_hass
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async def async_request_stream(hass, entity_id, fmt):
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"""Request a stream for a camera entity."""
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camera = _get_camera_from_entity_id(hass, entity_id)
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camera_prefs = hass.data[DATA_CAMERA_PREFS].get(entity_id)
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if not camera.stream_source:
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raise HomeAssistantError("{} does not support play stream service"
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.format(camera.entity_id))
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return request_stream(hass, camera.stream_source, fmt=fmt,
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keepalive=camera_prefs.preload_stream)
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@bind_hass
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async def async_get_image(hass, entity_id, timeout=10):
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"""Fetch an image from a camera entity."""
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camera = _get_camera_from_entity_id(hass, entity_id)
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with suppress(asyncio.CancelledError, asyncio.TimeoutError):
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with async_timeout.timeout(timeout, loop=hass.loop):
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image = await camera.async_camera_image()
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if image:
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return Image(camera.content_type, image)
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raise HomeAssistantError('Unable to get image')
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@bind_hass
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async def async_get_mjpeg_stream(hass, request, entity_id):
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"""Fetch an mjpeg stream from a camera entity."""
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camera = _get_camera_from_entity_id(hass, entity_id)
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return await camera.handle_async_mjpeg_stream(request)
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async def async_get_still_stream(request, image_cb, content_type, interval):
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"""Generate an HTTP MJPEG stream from camera images.
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This method must be run in the event loop.
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"""
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response = web.StreamResponse()
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response.content_type = ('multipart/x-mixed-replace; '
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'boundary=--frameboundary')
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await response.prepare(request)
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async def write_to_mjpeg_stream(img_bytes):
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"""Write image to stream."""
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await response.write(bytes(
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'--frameboundary\r\n'
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'Content-Type: {}\r\n'
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'Content-Length: {}\r\n\r\n'.format(
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content_type, len(img_bytes)),
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'utf-8') + img_bytes + b'\r\n')
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last_image = None
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while True:
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img_bytes = await image_cb()
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if not img_bytes:
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break
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if img_bytes != last_image:
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await write_to_mjpeg_stream(img_bytes)
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# Chrome seems to always ignore first picture,
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# print it twice.
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if last_image is None:
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await write_to_mjpeg_stream(img_bytes)
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last_image = img_bytes
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await asyncio.sleep(interval)
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return response
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def _get_camera_from_entity_id(hass, entity_id):
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"""Get camera component from entity_id."""
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component = hass.data.get(DOMAIN)
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if component is None:
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raise HomeAssistantError('Camera component not set up')
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camera = component.get_entity(entity_id)
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if camera is None:
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raise HomeAssistantError('Camera not found')
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if not camera.is_on:
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raise HomeAssistantError('Camera is off')
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return camera
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async def async_setup(hass, config):
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"""Set up the camera component."""
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component = hass.data[DOMAIN] = \
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EntityComponent(_LOGGER, DOMAIN, hass, SCAN_INTERVAL)
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prefs = CameraPreferences(hass)
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await prefs.async_initialize()
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hass.data[DATA_CAMERA_PREFS] = prefs
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hass.http.register_view(CameraImageView(component))
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hass.http.register_view(CameraMjpegStream(component))
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hass.components.websocket_api.async_register_command(
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WS_TYPE_CAMERA_THUMBNAIL, websocket_camera_thumbnail,
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SCHEMA_WS_CAMERA_THUMBNAIL
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)
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hass.components.websocket_api.async_register_command(ws_camera_stream)
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hass.components.websocket_api.async_register_command(websocket_get_prefs)
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hass.components.websocket_api.async_register_command(
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websocket_update_prefs)
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await component.async_setup(config)
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@callback
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def preload_stream(event):
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for camera in component.entities:
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camera_prefs = prefs.get(camera.entity_id)
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if camera.stream_source and camera_prefs.preload_stream:
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request_stream(hass, camera.stream_source, keepalive=True)
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hass.bus.async_listen_once(EVENT_HOMEASSISTANT_START, preload_stream)
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@callback
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def update_tokens(time):
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"""Update tokens of the entities."""
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for entity in component.entities:
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entity.async_update_token()
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hass.async_create_task(entity.async_update_ha_state())
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hass.helpers.event.async_track_time_interval(
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update_tokens, TOKEN_CHANGE_INTERVAL)
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component.async_register_entity_service(
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SERVICE_ENABLE_MOTION, CAMERA_SERVICE_SCHEMA,
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'async_enable_motion_detection'
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)
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component.async_register_entity_service(
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SERVICE_DISABLE_MOTION, CAMERA_SERVICE_SCHEMA,
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'async_disable_motion_detection'
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)
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component.async_register_entity_service(
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SERVICE_TURN_OFF, CAMERA_SERVICE_SCHEMA,
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'async_turn_off'
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)
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component.async_register_entity_service(
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SERVICE_TURN_ON, CAMERA_SERVICE_SCHEMA,
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'async_turn_on'
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)
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component.async_register_entity_service(
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SERVICE_SNAPSHOT, CAMERA_SERVICE_SNAPSHOT,
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async_handle_snapshot_service
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)
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component.async_register_entity_service(
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SERVICE_PLAY_STREAM, CAMERA_SERVICE_PLAY_STREAM,
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async_handle_play_stream_service
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)
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component.async_register_entity_service(
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SERVICE_RECORD, CAMERA_SERVICE_RECORD,
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async_handle_record_service
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)
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return True
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async def async_setup_entry(hass, entry):
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"""Set up a config entry."""
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return await hass.data[DOMAIN].async_setup_entry(entry)
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async def async_unload_entry(hass, entry):
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"""Unload a config entry."""
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return await hass.data[DOMAIN].async_unload_entry(entry)
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class Camera(Entity):
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"""The base class for camera entities."""
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def __init__(self):
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"""Initialize a camera."""
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self.is_streaming = False
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self.content_type = DEFAULT_CONTENT_TYPE
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self.access_tokens = collections.deque([], 2)
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self.async_update_token()
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@property
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def should_poll(self):
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"""No need to poll cameras."""
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return False
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@property
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def entity_picture(self):
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"""Return a link to the camera feed as entity picture."""
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return ENTITY_IMAGE_URL.format(self.entity_id, self.access_tokens[-1])
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@property
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def supported_features(self):
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"""Flag supported features."""
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return 0
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@property
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def is_recording(self):
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"""Return true if the device is recording."""
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return False
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@property
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def brand(self):
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"""Return the camera brand."""
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return None
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@property
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def motion_detection_enabled(self):
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"""Return the camera motion detection status."""
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return None
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@property
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def model(self):
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"""Return the camera model."""
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return None
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@property
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def frame_interval(self):
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"""Return the interval between frames of the mjpeg stream."""
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return 0.5
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@property
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def stream_source(self):
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"""Return the source of the stream."""
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return None
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def camera_image(self):
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"""Return bytes of camera image."""
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raise NotImplementedError()
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@callback
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def async_camera_image(self):
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"""Return bytes of camera image.
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This method must be run in the event loop and returns a coroutine.
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"""
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return self.hass.async_add_job(self.camera_image)
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async def handle_async_still_stream(self, request, interval):
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"""Generate an HTTP MJPEG stream from camera images.
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This method must be run in the event loop.
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"""
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return await async_get_still_stream(request, self.async_camera_image,
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self.content_type, interval)
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async def handle_async_mjpeg_stream(self, request):
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"""Serve an HTTP MJPEG stream from the camera.
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This method can be overridden by camera plaforms to proxy
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a direct stream from the camera.
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This method must be run in the event loop.
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"""
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return await self.handle_async_still_stream(
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request, self.frame_interval)
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@property
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def state(self):
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"""Return the camera state."""
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if self.is_recording:
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return STATE_RECORDING
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if self.is_streaming:
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return STATE_STREAMING
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return STATE_IDLE
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@property
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def is_on(self):
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"""Return true if on."""
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return True
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def turn_off(self):
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"""Turn off camera."""
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raise NotImplementedError()
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@callback
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def async_turn_off(self):
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"""Turn off camera."""
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return self.hass.async_add_job(self.turn_off)
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def turn_on(self):
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"""Turn off camera."""
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raise NotImplementedError()
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@callback
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def async_turn_on(self):
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"""Turn off camera."""
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return self.hass.async_add_job(self.turn_on)
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def enable_motion_detection(self):
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"""Enable motion detection in the camera."""
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raise NotImplementedError()
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@callback
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def async_enable_motion_detection(self):
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"""Call the job and enable motion detection."""
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return self.hass.async_add_job(self.enable_motion_detection)
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def disable_motion_detection(self):
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"""Disable motion detection in camera."""
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raise NotImplementedError()
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@callback
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def async_disable_motion_detection(self):
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"""Call the job and disable motion detection."""
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return self.hass.async_add_job(self.disable_motion_detection)
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@property
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def state_attributes(self):
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"""Return the camera state attributes."""
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attrs = {
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'access_token': self.access_tokens[-1],
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}
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if self.model:
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attrs['model_name'] = self.model
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if self.brand:
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attrs['brand'] = self.brand
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if self.motion_detection_enabled:
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attrs['motion_detection'] = self.motion_detection_enabled
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return attrs
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@callback
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def async_update_token(self):
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"""Update the used token."""
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self.access_tokens.append(
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hashlib.sha256(
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_RND.getrandbits(256).to_bytes(32, 'little')).hexdigest())
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class CameraView(HomeAssistantView):
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"""Base CameraView."""
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requires_auth = False
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def __init__(self, component):
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"""Initialize a basic camera view."""
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self.component = component
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async def get(self, request, entity_id):
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"""Start a GET request."""
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camera = self.component.get_entity(entity_id)
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if camera is None:
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raise web.HTTPNotFound()
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authenticated = (request[KEY_AUTHENTICATED] or
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request.query.get('token') in camera.access_tokens)
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if not authenticated:
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raise web.HTTPUnauthorized()
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if not camera.is_on:
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_LOGGER.debug('Camera is off.')
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raise web.HTTPServiceUnavailable()
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return await self.handle(request, camera)
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async def handle(self, request, camera):
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"""Handle the camera request."""
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raise NotImplementedError()
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class CameraImageView(CameraView):
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"""Camera view to serve an image."""
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url = '/api/camera_proxy/{entity_id}'
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name = 'api:camera:image'
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async def handle(self, request, camera):
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"""Serve camera image."""
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with suppress(asyncio.CancelledError, asyncio.TimeoutError):
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with async_timeout.timeout(10, loop=request.app['hass'].loop):
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image = await camera.async_camera_image()
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if image:
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return web.Response(body=image,
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content_type=camera.content_type)
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raise web.HTTPInternalServerError()
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class CameraMjpegStream(CameraView):
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"""Camera View to serve an MJPEG stream."""
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url = '/api/camera_proxy_stream/{entity_id}'
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name = 'api:camera:stream'
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async def handle(self, request, camera):
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"""Serve camera stream, possibly with interval."""
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interval = request.query.get('interval')
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if interval is None:
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return await camera.handle_async_mjpeg_stream(request)
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try:
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# Compose camera stream from stills
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interval = float(request.query.get('interval'))
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if interval < MIN_STREAM_INTERVAL:
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raise ValueError("Stream interval must be be > {}"
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.format(MIN_STREAM_INTERVAL))
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return await camera.handle_async_still_stream(request, interval)
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except ValueError:
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raise web.HTTPBadRequest()
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@websocket_api.async_response
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async def websocket_camera_thumbnail(hass, connection, msg):
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"""Handle get camera thumbnail websocket command.
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Async friendly.
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"""
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try:
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image = await async_get_image(hass, msg['entity_id'])
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connection.send_message(websocket_api.result_message(
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msg['id'], {
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'content_type': image.content_type,
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'content': base64.b64encode(image.content).decode('utf-8')
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}
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))
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except HomeAssistantError:
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connection.send_message(websocket_api.error_message(
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msg['id'], 'image_fetch_failed', 'Unable to fetch image'))
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@websocket_api.async_response
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@websocket_api.websocket_command({
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vol.Required('type'): 'camera/stream',
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vol.Required('entity_id'): cv.entity_id,
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vol.Optional('format', default='hls'): vol.In(OUTPUT_FORMATS),
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})
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|
async def ws_camera_stream(hass, connection, msg):
|
|
"""Handle get camera stream websocket command.
|
|
|
|
Async friendly.
|
|
"""
|
|
try:
|
|
entity_id = msg['entity_id']
|
|
camera = _get_camera_from_entity_id(hass, entity_id)
|
|
camera_prefs = hass.data[DATA_CAMERA_PREFS].get(entity_id)
|
|
|
|
if not camera.stream_source:
|
|
raise HomeAssistantError("{} does not support play stream service"
|
|
.format(camera.entity_id))
|
|
|
|
fmt = msg['format']
|
|
url = request_stream(hass, camera.stream_source, fmt=fmt,
|
|
keepalive=camera_prefs.preload_stream)
|
|
connection.send_result(msg['id'], {'url': url})
|
|
except HomeAssistantError as ex:
|
|
_LOGGER.error(ex)
|
|
connection.send_error(
|
|
msg['id'], 'start_stream_failed', str(ex))
|
|
|
|
|
|
@websocket_api.async_response
|
|
@websocket_api.websocket_command({
|
|
vol.Required('type'): 'camera/get_prefs',
|
|
vol.Required('entity_id'): cv.entity_id,
|
|
})
|
|
async def websocket_get_prefs(hass, connection, msg):
|
|
"""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.async_response
|
|
@websocket_api.websocket_command({
|
|
vol.Required('type'): 'camera/update_prefs',
|
|
vol.Required('entity_id'): cv.entity_id,
|
|
vol.Optional('preload_stream'): bool,
|
|
})
|
|
async def websocket_update_prefs(hass, connection, msg):
|
|
"""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, service):
|
|
"""Handle snapshot services calls."""
|
|
hass = camera.hass
|
|
filename = service.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()
|
|
|
|
def _write_image(to_file, image_data):
|
|
"""Executor helper to write image."""
|
|
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, service_call):
|
|
"""Handle play stream services calls."""
|
|
if not camera.stream_source:
|
|
raise HomeAssistantError("{} does not support play stream service"
|
|
.format(camera.entity_id))
|
|
|
|
hass = camera.hass
|
|
camera_prefs = hass.data[DATA_CAMERA_PREFS].get(camera.entity_id)
|
|
fmt = service_call.data[ATTR_FORMAT]
|
|
entity_ids = service_call.data[ATTR_MEDIA_PLAYER]
|
|
|
|
url = request_stream(hass, camera.stream_source, fmt=fmt,
|
|
keepalive=camera_prefs.preload_stream)
|
|
data = {
|
|
ATTR_ENTITY_ID: entity_ids,
|
|
ATTR_MEDIA_CONTENT_ID: "{}{}".format(hass.config.api.base_url, url),
|
|
ATTR_MEDIA_CONTENT_TYPE: FORMAT_CONTENT_TYPE[fmt]
|
|
}
|
|
|
|
await hass.services.async_call(
|
|
DOMAIN_MP, SERVICE_PLAY_MEDIA, data,
|
|
blocking=True, context=service_call.context)
|
|
|
|
|
|
async def async_handle_record_service(camera, call):
|
|
"""Handle stream recording service calls."""
|
|
if not camera.stream_source:
|
|
raise HomeAssistantError("{} does not support record service"
|
|
.format(camera.entity_id))
|
|
|
|
hass = camera.hass
|
|
filename = call.data[CONF_FILENAME]
|
|
filename.hass = hass
|
|
video_path = filename.async_render(
|
|
variables={ATTR_ENTITY_ID: camera})
|
|
|
|
data = {
|
|
CONF_STREAM_SOURCE: camera.stream_source,
|
|
CONF_FILENAME: video_path,
|
|
CONF_DURATION: call.data[CONF_DURATION],
|
|
CONF_LOOKBACK: call.data[CONF_LOOKBACK],
|
|
}
|
|
|
|
await hass.services.async_call(
|
|
DOMAIN_STREAM, SERVICE_RECORD, data,
|
|
blocking=True, context=call.context)
|