113 lines
3.2 KiB
Python
113 lines
3.2 KiB
Python
import asyncio
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import json
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import uvicorn
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from fastapi import FastAPI
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import paho.mqtt.client as mqtt
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from pydantic import BaseModel
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from starlette.middleware.cors import CORSMiddleware
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class BaseResponse(BaseModel):
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code: int = 200
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msg: str = "success"
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app = FastAPI()
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app.add_middleware(
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CORSMiddleware,
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allow_origins=["*"],
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allow_credentials=True,
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allow_methods=["*"],
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allow_headers=["*"],
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)
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class MQTTClient:
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def __init__(self, broker, port, topic, username, password):
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self.broker = broker
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self.port = port
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self.topic = topic
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self.username = username
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self.password = password
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# 千万不要指定client_id 不然死翘翘
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self.client = mqtt.Client()
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self.client.username_pw_set(self.username, self.password)
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def push(self):
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self.client.publish(self.topic, payload=json.dumps({"msg": "open_led"}, ensure_ascii=False),
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qos=0)
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self.client.publish(self.topic, payload=json.dumps({"msg": "push_stream"}, ensure_ascii=False),
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qos=0)
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def close(self):
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self.client.publish(self.topic, payload=json.dumps({"msg": "close_stream"}, ensure_ascii=False),
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qos=0)
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self.client.publish(self.topic, payload=json.dumps({"msg": "close_led"}, ensure_ascii=False),
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qos=0)
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def start(self):
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self.client.connect(self.broker, self.port)
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user_sched = {}
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async def close(username, device):
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# 倒计时600秒
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await asyncio.sleep(35)
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print(username + "结束推流")
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user_sched.pop(username)
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close_stream(username, device)
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async def task_start(username, device):
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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
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@app.get("/start/video/{username}/{device}")
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async def start(username, device):
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try:
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# 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
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if username not in user_sched:
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print(username + "开始推流")
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push_stream(username, device)
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# 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
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else:
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t = user_sched[username]
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# 取消任务
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if t is not None:
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print(username + "取消定时任务")
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t.cancel()
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return BaseResponse(code=200, msg="success")
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except Exception as e:
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return BaseResponse(code=500, msg=str(e))
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@app.get("/stop/video/{username}/{device}")
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async def stop(username, device):
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try:
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await task_start(username, device)
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return BaseResponse(code=200, msg="success")
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except Exception as e:
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return BaseResponse(code=500, msg=str(e))
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def push_stream(username, device):
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MQTT = MQTTClient(broker, port, device, username, username)
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MQTT.start()
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MQTT.push()
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def close_stream(username, device):
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MQTT = MQTTClient(broker, port, device, username, username)
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MQTT.start()
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MQTT.close()
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if __name__ == '__main__':
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broker = 'mqtt.lihaink.cn'
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port = 1883
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uvicorn.run(app, host="0.0.0.0", port=8000)
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