256 lines
8.9 KiB
Python
256 lines
8.9 KiB
Python
import uvicorn
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from fastapi import FastAPI, WebSocket
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import requests
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import asyncio
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import json
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import paho.mqtt.client as mqtt
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from pydantic import BaseModel
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app = FastAPI()
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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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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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async def close(username, device):
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# 倒计时600秒
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await asyncio.sleep(30)
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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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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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res = requests.get(rtsp_MediaInfo + device)
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if res.status_code != 200:
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return BaseResponse(code=500, msg="ZLMediakit Server Error!").json()
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# 转换为json
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res = res.json()
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if 'code' in res and res['code'] == 0:
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return BaseResponse(code=200, msg=username + ",Do not repeat push stream").json()
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# 开始推流
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get_times = 50
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# 启动推流程序
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print(username + "开始推流")
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push_stream(username, device)
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# 查看请求 ，ZLMediakit是否已经生成了mp4文件,生成了就给前端返回
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while True:
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res = requests.get(rtsp_MediaInfo + device)
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if res.status_code != 200:
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return BaseResponse(code=200, msg="ZLMediakit Server Error!").json()
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# 转换为json
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res = res.json()
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if 'code' in res and res['code'] == 0:
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# code == 0 说明已经启动成功
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break
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# 如果都没有code，那就出错了
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if 'code' not in res:
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return BaseResponse(code=500, msg="ZLMediakit Server Error!").json()
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get_times -= 1
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if get_times == 0:
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# 请求次数达到50次就退了吧
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return BaseResponse(code=500, msg="ZLMediakit Server Error!").json()
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await asyncio.sleep(1)
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return BaseResponse(code=200, msg="success").json()
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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").json()
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else:
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BaseResponse(code=500, msg="Internal Error").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):
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try:
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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):
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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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# 定义函数A
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async def function_A(data):
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data = json.loads(data)
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username = data['username']
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device = data['device']
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return await start(username, device)
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# 定义函数B
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async def function_B(data):
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data = json.loads(data)
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username = data['username']
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device = data['device']
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await stop(username, device)
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class Scene:
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def __init__(self, user):
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self.user = user
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self.active = False
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def turn_on(self):
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self.active = True
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def turn_off(self):
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self.active = False
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class AppScene(Scene):
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def __init__(self, user):
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super().__init__(user)
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self.name = "app"
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class WebScene(Scene):
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def __init__(self, user):
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super().__init__(user)
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self.name = "web"
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class ScreenScene(Scene):
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def __init__(self, user):
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super().__init__(user)
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self.name = "screen"
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class SceneManager:
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def __init__(self):
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self.users = {}
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def add_user(self, user):
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# 上锁
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if user not in self.users:
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self.users[user] = {"app": AppScene(user), "web": WebScene(user), "screen": ScreenScene(user)}
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def get_scene(self, user, scene_type):
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return self.users[user].get(scene_type)
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async def on_connect(ws: WebSocket):
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await ws.send_text(json.dumps({"code": 201, "msg": "socket已连接，等待接收消息"}, ensure_ascii=False))
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async def on_disconnect(the_user_scene, user_app_scene, user_web_scene, user_screen_scene, message):
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if the_user_scene is not None:
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the_user_scene.turn_off()
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# 查看该用户的所有场景是否在线,只有都不在线就关闭推流
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if user_app_scene is not None and user_app_scene is not None and user_app_scene is not None:
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if user_app_scene.active is False and user_web_scene.active is False and user_screen_scene.active is False:
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print("关闭场景" + the_user_scene.name)
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await function_B(message)
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@app.websocket("/")
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async def wsk(ws: WebSocket):
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the_user_scene = None
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user_app_scene = None
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user_web_scene = None
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user_screen_scene = None
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username = ""
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await ws.accept()
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await on_connect(ws)
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try:
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while True:
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message = await ws.receive_text()
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await ws.send_text(json.dumps({"code": 202, "msg": "socket已收到消息，等待处理"}, ensure_ascii=False))
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user_msg[ws] = message
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data = json.loads(message)
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username = data['username']
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scene_name = data[SCENE_NAME]
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scene_manager.add_user(username)
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the_user_scene = scene_manager.get_scene(username, scene_name)
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if the_user_scene.active is True:
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await ws.send_text(
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json.dumps({"code": 200,
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"msg": the_user_scene.user + "的" + the_user_scene.name + "该场景已经开启了，不要再请求我了,请等待一会！"},
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ensure_ascii=False))
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continue
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user_app_scene = scene_manager.get_scene(username, "app")
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user_web_scene = scene_manager.get_scene(username, "web")
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user_screen_scene = scene_manager.get_scene(username, "screen")
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if user_app_scene.active is True or user_web_scene.active is True or user_screen_scene.active is True:
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the_user_scene.turn_on()
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await ws.send_text(
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json.dumps({"code": 200, "msg": "该用户已经有其他场景开启了，请等待一会！不需要再推流了！"},
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ensure_ascii=False))
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continue
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# 如果该用户的场景没有开启，那么进行开启
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print(username + "开启场景" + the_user_scene.name)
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the_user_scene.turn_on()
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response = await function_A(message)
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# 当接收到消息时调用函数A
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await ws.send_text(response)
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except Exception as e:
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print(f"{username}的{the_user_scene.name}场景的连接已断开,异常消息或代码：{e}")
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await on_disconnect(the_user_scene, user_app_scene, user_web_scene, user_screen_scene, user_msg[ws])
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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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rtsp_MediaInfo = "http://rtsp.lihaink.cn/index/api/getMediaInfo?secret=YwDtp2llj80HA19JhMXL4Po99nsMAyNT&schema=rtsp&vhost=__defaultVhost__&app=live&stream="
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SCENE_NAME = "scene"
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user_sched = {}
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user_msg = {}
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user_scene = []
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scene_manager = SceneManager()
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uvicorn.run(app, host="0.0.0.0", port=8765)
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