lot_manager/video_task.py

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import websockets
import asyncio
import json
import paho.mqtt.client as mqtt
from pydantic import BaseModel
broker = 'mqtt.lihaink.cn'
port = 1883
class BaseResponse(BaseModel):
code: int = 200
msg: str = "success"
class MQTTClient:
def __init__(self, broker, port, topic, username, password):
self.broker = broker
self.port = port
self.topic = topic
self.username = username
self.password = password
# 千万不要指定client_id 不然死翘翘
self.client = mqtt.Client()
self.client.username_pw_set(self.username, self.password)
def push(self):
self.client.publish(self.topic, payload=json.dumps({"msg": "open_led"}, ensure_ascii=False),
qos=0)
self.client.publish(self.topic, payload=json.dumps({"msg": "push_stream"}, ensure_ascii=False),
qos=0)
def close(self):
self.client.publish(self.topic, payload=json.dumps({"msg": "close_stream"}, ensure_ascii=False),
qos=0)
self.client.publish(self.topic, payload=json.dumps({"msg": "close_led"}, ensure_ascii=False),
qos=0)
def start(self):
self.client.connect(self.broker, self.port)
user_sched = {}
async def close(username, device):
# 倒计时600秒
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await asyncio.sleep(30)
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print(username + "结束推流")
user_sched.pop(username)
close_stream(username, device)
async def task_start(username, device):
print(username + "创建结束推流定时任务")
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task = asyncio.create_task(close(username, device))
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user_sched[username] = task
async def start(username, device):
try:
# 如果定时任务不存在,那么直接进行推流。当用户退出界面时,创建任务
if username not in user_sched:
print(username + "开始推流")
push_stream(username, device)
# 如果定时任务存在,那么取消上次的任务。当用户退出界面时,创建任务
else:
t = user_sched[username]
# 取消任务
if t is not None:
print(username + "取消定时任务")
t.cancel()
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return BaseResponse(code=200, msg="success").json()
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except Exception as e:
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return BaseResponse(code=500, msg=str(e)).json()
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async def stop(username, device):
try:
await task_start(username, device)
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return BaseResponse(code=200, msg="success").json()
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except Exception as e:
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return BaseResponse(code=500, msg=str(e)).json()
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def push_stream(username, device):
MQTT = MQTTClient(broker, port, device, username, username)
MQTT.start()
MQTT.push()
def close_stream(username, device):
MQTT = MQTTClient(broker, port, device, username, username)
MQTT.start()
MQTT.close()
# 定义函数A
async def function_A(client, data):
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data = json.loads(data)
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username = data['username']
device = data['device']
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# print("A", username, device)
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return await start(username, device)
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# 定义函数B
async def function_B(client, data):
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data = json.loads(data)
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username = data['username']
device = data['device']
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# print("B", username, device)
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print(f"{client}的连接已断开")
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await stop(username, device)
user_msg = {}
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user_scene = [False, False, False]
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# 创建WebSocket连接的处理函数
async def handler(websocket, path):
try:
# 在循环中等待客户端的消息
async for message in websocket:
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user_msg[websocket] = message
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# 当接收到消息时调用函数A
response = await function_A(websocket, message)
await websocket.send(response)
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# 本地情况
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await function_B(websocket, message)
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except Exception as e:
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msg = user_msg[websocket]
await function_B(websocket, msg)
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# 启动WebSocket服务器
start_server = websockets.serve(handler, "0.0.0.0", 8765)
asyncio.get_event_loop().run_until_complete(start_server)
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asyncio.get_event_loop().run_forever()