Initial implementation of mjpeg camera

homeassistant/components/camera/mjpeg.py

@@ -0,0 +1,65 @@
+"""
+homeassistant.components.camera.mjpeg
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+Support for IP Cameras.
+
+For more details about this platform, please refer to the documentation at
+https://home-assistant.io/components/camera.mjpeg.html
+"""
+import logging
+from requests.auth import HTTPBasicAuth
+from homeassistant.helpers import validate_config
+from homeassistant.components.camera import DOMAIN
+from homeassistant.components.camera import Camera
+import urllib.request
+
+_LOGGER = logging.getLogger(__name__)
+
+
+# pylint: disable=unused-argument
+def setup_platform(hass, config, add_devices_callback, discovery_info=None):
+    """ Adds a mjpeg IP Camera. """
+    if not validate_config({DOMAIN: config}, {DOMAIN: ['mjpeg_url']},
+                           _LOGGER):
+        return None
+
+    add_devices_callback([MjpegCamera(config)])
+
+
+# pylint: disable=too-many-instance-attributes
+class MjpegCamera(Camera):
+    """
+    A generic implementation of an IP camera that is reachable over a URL.
+    """
+
+    def __init__(self, device_info):
+        super().__init__()
+        self._name = device_info.get('name', 'Mjpeg Camera')
+        self._username = device_info.get('username')
+        self._password = device_info.get('password')
+        self._mjpeg_url = device_info['mjpeg_url']
+
+    def camera_image(self):
+        """ Return a still image reponse from the camera. """
+        if self._username and self._password:
+            password_mgr = urllib.request.HTTPPasswordMgrWithDefaultRealm()
+            password_mgr.add_password(None, self._mjpeg_url, self._username, self._password)
+            handler = urllib.request.HTTPBasicAuthHandler(password_mgr)
+            opener = urllib.request.build_opener(handler)
+            urllib.request.install_opener(opener)
+
+        stream=urllib.request.urlopen(self._mjpeg_url)
+        charset = stream.headers.get_param('charset')
+        bytes = b''
+        while True:
+            bytes += stream.read(1024)
+            a = bytes.find(b'\xff\xd8')
+            b = bytes.find(b'\xff\xd9')
+            if a != -1 and b != -1:
+                jpg = bytes[a:b+2]
+                return jpg
+
+    @property
+    def name(self):
+        """ Return the name of this device. """
+        return self._name