blakeblackshear.frigate/frigate/mqtt.py
2021-07-06 07:36:37 -05:00

259 lines
9.4 KiB
Python

import json
import logging
import threading
from wsgiref.simple_server import make_server
import paho.mqtt.client as mqtt
from ws4py.server.wsgirefserver import (
WebSocketWSGIHandler,
WebSocketWSGIRequestHandler,
WSGIServer,
)
from ws4py.server.wsgiutils import WebSocketWSGIApplication
from ws4py.websocket import WebSocket
from frigate.config import FrigateConfig
from frigate.util import restart_frigate
logger = logging.getLogger(__name__)
def create_mqtt_client(config: FrigateConfig, camera_metrics):
mqtt_config = config.mqtt
def on_clips_command(client, userdata, message):
payload = message.payload.decode()
logger.debug(f"on_clips_toggle: {message.topic} {payload}")
camera_name = message.topic.split("/")[-3]
clips_settings = config.cameras[camera_name].clips
if payload == "ON":
if not clips_settings.enabled:
logger.info(f"Turning on clips for {camera_name} via mqtt")
clips_settings.enabled = True
elif payload == "OFF":
if clips_settings.enabled:
logger.info(f"Turning off clips for {camera_name} via mqtt")
clips_settings.enabled = False
else:
logger.warning(f"Received unsupported value at {message.topic}: {payload}")
state_topic = f"{message.topic[:-4]}/state"
client.publish(state_topic, payload, retain=True)
def on_snapshots_command(client, userdata, message):
payload = message.payload.decode()
logger.debug(f"on_snapshots_toggle: {message.topic} {payload}")
camera_name = message.topic.split("/")[-3]
snapshots_settings = config.cameras[camera_name].snapshots
if payload == "ON":
if not snapshots_settings.enabled:
logger.info(f"Turning on snapshots for {camera_name} via mqtt")
snapshots_settings.enabled = True
elif payload == "OFF":
if snapshots_settings.enabled:
logger.info(f"Turning off snapshots for {camera_name} via mqtt")
snapshots_settings.enabled = False
else:
logger.warning(f"Received unsupported value at {message.topic}: {payload}")
state_topic = f"{message.topic[:-4]}/state"
client.publish(state_topic, payload, retain=True)
def on_detect_command(client, userdata, message):
payload = message.payload.decode()
logger.debug(f"on_detect_toggle: {message.topic} {payload}")
camera_name = message.topic.split("/")[-3]
detect_settings = config.cameras[camera_name].detect
if payload == "ON":
if not camera_metrics[camera_name]["detection_enabled"].value:
logger.info(f"Turning on detection for {camera_name} via mqtt")
camera_metrics[camera_name]["detection_enabled"].value = True
detect_settings.enabled = True
elif payload == "OFF":
if camera_metrics[camera_name]["detection_enabled"].value:
logger.info(f"Turning off detection for {camera_name} via mqtt")
camera_metrics[camera_name]["detection_enabled"].value = False
detect_settings.enabled = False
else:
logger.warning(f"Received unsupported value at {message.topic}: {payload}")
state_topic = f"{message.topic[:-4]}/state"
client.publish(state_topic, payload, retain=True)
def on_restart_command(client, userdata, message):
payload = message.payload.decode()
if payload == "container":
logger.warning(f"Restart container received via mqtt")
restart_frigate()
else:
logger.warning(f"Received unsupported value at {message.topic}: {payload}")
def on_connect(client, userdata, flags, rc):
threading.current_thread().name = "mqtt"
if rc != 0:
if rc == 3:
logger.error("MQTT Server unavailable")
elif rc == 4:
logger.error("MQTT Bad username or password")
elif rc == 5:
logger.error("MQTT Not authorized")
else:
logger.error(
"Unable to connect to MQTT: Connection refused. Error code: "
+ str(rc)
)
logger.info("MQTT connected")
client.subscribe(f"{mqtt_config.topic_prefix}/#")
client.publish(mqtt_config.topic_prefix + "/available", "online", retain=True)
client = mqtt.Client(client_id=mqtt_config.client_id)
client.on_connect = on_connect
client.will_set(
mqtt_config.topic_prefix + "/available", payload="offline", qos=1, retain=True
)
# register callbacks
for name in config.cameras.keys():
client.message_callback_add(
f"{mqtt_config.topic_prefix}/{name}/clips/set", on_clips_command
)
client.message_callback_add(
f"{mqtt_config.topic_prefix}/{name}/snapshots/set", on_snapshots_command
)
client.message_callback_add(
f"{mqtt_config.topic_prefix}/{name}/detect/set", on_detect_command
)
client.message_callback_add(
f"{mqtt_config.topic_prefix}/restart", on_restart_command
)
if not mqtt_config.tls_ca_certs is None:
if (
not mqtt_config.tls_client_cert is None
and not mqtt_config.tls_client_key is None
):
client.tls_set(
mqtt_config.tls_ca_certs,
mqtt_config.tls_client_cert,
mqtt_config.tls_client_key,
)
else:
client.tls_set(mqtt_config.tls_ca_certs)
if not mqtt_config.tls_insecure is None:
client.tls_insecure_set(mqtt_config.tls_insecure)
if not mqtt_config.user is None:
client.username_pw_set(mqtt_config.user, password=mqtt_config.password)
try:
client.connect(mqtt_config.host, mqtt_config.port, 60)
except Exception as e:
logger.error(f"Unable to connect to MQTT server: {e}")
raise
client.loop_start()
for name in config.cameras.keys():
client.publish(
f"{mqtt_config.topic_prefix}/{name}/clips/state",
"ON" if config.cameras[name].clips.enabled else "OFF",
retain=True,
)
client.publish(
f"{mqtt_config.topic_prefix}/{name}/snapshots/state",
"ON" if config.cameras[name].snapshots.enabled else "OFF",
retain=True,
)
client.publish(
f"{mqtt_config.topic_prefix}/{name}/detect/state",
"ON" if config.cameras[name].detect.enabled else "OFF",
retain=True,
)
return client
class MqttSocketRelay:
def __init__(self, mqtt_client, topic_prefix):
self.mqtt_client = mqtt_client
self.topic_prefix = topic_prefix
def start(self):
class MqttWebSocket(WebSocket):
topic_prefix = self.topic_prefix
mqtt_client = self.mqtt_client
def received_message(self, message):
try:
json_message = json.loads(message.data.decode("utf-8"))
json_message = {
"topic": f"{self.topic_prefix}/{json_message['topic']}",
"payload": json_message["payload"],
"retain": json_message.get("retain", False),
}
except Exception as e:
logger.warning("Unable to parse websocket message as valid json.")
return
logger.debug(
f"Publishing mqtt message from websockets at {json_message['topic']}."
)
self.mqtt_client.publish(
json_message["topic"],
json_message["payload"],
retain=json_message["retain"],
)
# start a websocket server on 5002
WebSocketWSGIHandler.http_version = "1.1"
self.websocket_server = make_server(
"127.0.0.1",
5002,
server_class=WSGIServer,
handler_class=WebSocketWSGIRequestHandler,
app=WebSocketWSGIApplication(handler_cls=MqttWebSocket),
)
self.websocket_server.initialize_websockets_manager()
self.websocket_thread = threading.Thread(
target=self.websocket_server.serve_forever
)
def send(client, userdata, message):
"""Sends mqtt messages to clients."""
try:
logger.debug(f"Received mqtt message on {message.topic}.")
ws_message = json.dumps(
{
"topic": message.topic.replace(f"{self.topic_prefix}/", ""),
"payload": message.payload.decode(),
}
)
except Exception as e:
# if the payload can't be decoded don't relay to clients
logger.debug(
f"MQTT payload for {message.topic} wasn't text. Skipping..."
)
return
self.websocket_server.manager.broadcast(ws_message)
self.mqtt_client.message_callback_add(f"{self.topic_prefix}/#", send)
self.websocket_thread.start()
def stop(self):
self.websocket_server.manager.close_all()
self.websocket_server.manager.stop()
self.websocket_server.manager.join()
self.websocket_server.shutdown()
self.websocket_thread.join()