144 lines
5.0 KiB
Python
144 lines
5.0 KiB
Python
"""
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Support for IP Cameras.
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For more details about this platform, please refer to the documentation at
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https://home-assistant.io/components/camera.mjpeg/
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"""
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import asyncio
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import logging
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from contextlib import closing
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import aiohttp
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import async_timeout
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import requests
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from requests.auth import HTTPBasicAuth, HTTPDigestAuth
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import voluptuous as vol
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from homeassistant.const import (
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CONF_NAME, CONF_USERNAME, CONF_PASSWORD, CONF_AUTHENTICATION,
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HTTP_BASIC_AUTHENTICATION, HTTP_DIGEST_AUTHENTICATION)
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from homeassistant.components.camera import (PLATFORM_SCHEMA, Camera)
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from homeassistant.helpers.aiohttp_client import (
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async_get_clientsession, async_aiohttp_proxy_web)
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from homeassistant.helpers import config_validation as cv
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_LOGGER = logging.getLogger(__name__)
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CONF_MJPEG_URL = 'mjpeg_url'
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CONF_STILL_IMAGE_URL = 'still_image_url'
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CONTENT_TYPE_HEADER = 'Content-Type'
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DEFAULT_NAME = 'Mjpeg Camera'
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PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend({
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vol.Required(CONF_MJPEG_URL): cv.url,
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vol.Optional(CONF_STILL_IMAGE_URL): cv.url,
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vol.Optional(CONF_AUTHENTICATION, default=HTTP_BASIC_AUTHENTICATION):
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vol.In([HTTP_BASIC_AUTHENTICATION, HTTP_DIGEST_AUTHENTICATION]),
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vol.Optional(CONF_NAME, default=DEFAULT_NAME): cv.string,
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vol.Optional(CONF_PASSWORD): cv.string,
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vol.Optional(CONF_USERNAME): cv.string,
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})
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@asyncio.coroutine
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def async_setup_platform(hass, config, async_add_entities,
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discovery_info=None):
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"""Set up a MJPEG IP Camera."""
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if discovery_info:
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config = PLATFORM_SCHEMA(discovery_info)
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async_add_entities([MjpegCamera(config)])
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def extract_image_from_mjpeg(stream):
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"""Take in a MJPEG stream object, return the jpg from it."""
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data = b''
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for chunk in stream:
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data += chunk
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jpg_start = data.find(b'\xff\xd8')
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jpg_end = data.find(b'\xff\xd9')
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if jpg_start != -1 and jpg_end != -1:
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jpg = data[jpg_start:jpg_end + 2]
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return jpg
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class MjpegCamera(Camera):
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"""An implementation of an IP camera that is reachable over a URL."""
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def __init__(self, device_info):
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"""Initialize a MJPEG camera."""
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super().__init__()
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self._name = device_info.get(CONF_NAME)
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self._authentication = device_info.get(CONF_AUTHENTICATION)
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self._username = device_info.get(CONF_USERNAME)
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self._password = device_info.get(CONF_PASSWORD)
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self._mjpeg_url = device_info[CONF_MJPEG_URL]
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self._still_image_url = device_info.get(CONF_STILL_IMAGE_URL)
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self._auth = None
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if self._username and self._password:
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if self._authentication == HTTP_BASIC_AUTHENTICATION:
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self._auth = aiohttp.BasicAuth(
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self._username, password=self._password
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)
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@asyncio.coroutine
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def async_camera_image(self):
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"""Return a still image response from the camera."""
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# DigestAuth is not supported
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if self._authentication == HTTP_DIGEST_AUTHENTICATION or \
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self._still_image_url is None:
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image = yield from self.hass.async_add_job(
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self.camera_image)
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return image
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websession = async_get_clientsession(self.hass)
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try:
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with async_timeout.timeout(10, loop=self.hass.loop):
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response = yield from websession.get(
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self._still_image_url, auth=self._auth)
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image = yield from response.read()
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return image
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except asyncio.TimeoutError:
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_LOGGER.error("Timeout getting camera image")
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except aiohttp.ClientError as err:
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_LOGGER.error("Error getting new camera image: %s", err)
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def camera_image(self):
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"""Return a still image response from the camera."""
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if self._username and self._password:
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if self._authentication == HTTP_DIGEST_AUTHENTICATION:
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auth = HTTPDigestAuth(self._username, self._password)
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else:
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auth = HTTPBasicAuth(self._username, self._password)
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req = requests.get(
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self._mjpeg_url, auth=auth, stream=True, timeout=10)
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else:
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req = requests.get(self._mjpeg_url, stream=True, timeout=10)
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# https://github.com/PyCQA/pylint/issues/1437
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# pylint: disable=no-member
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with closing(req) as response:
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return extract_image_from_mjpeg(response.iter_content(102400))
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async def handle_async_mjpeg_stream(self, request):
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"""Generate an HTTP MJPEG stream from the camera."""
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# aiohttp don't support DigestAuth -> Fallback
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if self._authentication == HTTP_DIGEST_AUTHENTICATION:
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await super().handle_async_mjpeg_stream(request)
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return
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# connect to stream
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websession = async_get_clientsession(self.hass)
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stream_coro = websession.get(self._mjpeg_url, auth=self._auth)
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return await async_aiohttp_proxy_web(self.hass, request, stream_coro)
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@property
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def name(self):
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"""Return the name of this camera."""
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return self._name
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