444 lines
20 KiB
Python
444 lines
20 KiB
Python
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import asyncio
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import datetime
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import json
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import os
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import base64
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from contextlib import asynccontextmanager
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from typing import Dict, Optional
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import cv2
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import numpy as np
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from Crypto.Cipher import AES
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from Crypto.Util.Padding import pad
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from fastapi import WebSocket, APIRouter, WebSocketDisconnect, FastAPI
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from core.detect import detectFrame
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from service.device_service import update_online_status_by_ip, get_unique_client_ips, get_is_need_handler_by_ip
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AES_SECRET_KEY = b"jr1vA6tfWMHOYi6UXw67UuO6fdak2rMa"
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AES_BLOCK_SIZE = 16 # AES固定块大小
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HEARTBEAT_INTERVAL = 10 # 心跳检查间隔（秒）
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HEARTBEAT_TIMEOUT = 30 # 客户端超时阈值（秒）
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WS_ENDPOINT = "/ws" # WebSocket端点路径
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FRAME_QUEUE_SIZE = 1 # 帧队列大小限制
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ONLINE_STATUS = 1
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OFFLINE_STATUS = 0
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def aes_encrypt(plaintext: str) -> dict:
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try:
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iv = os.urandom(AES_BLOCK_SIZE) # 随机IV（16字节）
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cipher = AES.new(AES_SECRET_KEY, AES.MODE_CBC, iv)
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padded_plaintext = pad(plaintext.encode("utf-8"), AES_BLOCK_SIZE)
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ciphertext = base64.b64encode(cipher.encrypt(padded_plaintext)).decode("utf-8")
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iv_base64 = base64.b64encode(iv).decode("utf-8")
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return {
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"ciphertext": ciphertext,
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"iv": iv_base64,
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"algorithm": "AES-CBC"
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}
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except Exception as e:
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raise Exception(f"AES加密失败: {str(e)}") from e
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def get_current_time_str() -> str:
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"""获取格式化时间字符串"""
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return datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")
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# ------------------------------
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# 客户端连接类（保持不变）
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# ------------------------------
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class ClientConnection:
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def __init__(self, websocket: WebSocket, client_ip: str):
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self.websocket = websocket
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self.client_ip = client_ip
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self.last_heartbeat = datetime.datetime.now()
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self.frame_queue = asyncio.Queue(maxsize=FRAME_QUEUE_SIZE)
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self.consumer_task: Optional[asyncio.Task] = None
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self.is_connected = False # 连接状态标记（用于连接管理，非业务状态）
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def update_heartbeat(self):
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"""更新心跳时间"""
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self.last_heartbeat = datetime.datetime.now()
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def is_alive(self) -> bool:
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"""判断客户端是否存活（心跳未超时）"""
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timeout_seconds = (datetime.datetime.now() - self.last_heartbeat).total_seconds()
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return timeout_seconds < HEARTBEAT_TIMEOUT
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def start_consumer(self):
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"""启动帧消费任务"""
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self.consumer_task = asyncio.create_task(self.consume_frames())
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return self.consumer_task
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async def send_frame_permit(self):
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"""发送加密的帧许可信号（服务器→客户端）"""
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try:
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frame_permit_msg = {
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"type": "frame",
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"timestamp": get_current_time_str(),
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"client_ip": self.client_ip
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}
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encrypted_msg = aes_encrypt(json.dumps(frame_permit_msg))
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await self.websocket.send_json(encrypted_msg)
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print(f"[{get_current_time_str()}] 客户端{self.client_ip}: 已发送加密帧许可")
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except Exception as e:
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print(f"[{get_current_time_str()}] 客户端{self.client_ip}: 帧许可加密/发送失败 - {str(e)}")
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async def consume_frames(self) -> None:
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"""消费队列中的明文图像帧并调用检测"""
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try:
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while self.is_connected: # 仅在有效连接状态下处理
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frame_data = await self.frame_queue.get()
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await self.send_frame_permit() # 回复帧许可
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try:
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await self.process_frame(frame_data)
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finally:
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self.frame_queue.task_done()
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except asyncio.CancelledError:
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print(f"[{get_current_time_str()}] 客户端{self.client_ip}: 帧消费任务已取消")
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except Exception as e:
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print(f"[{get_current_time_str()}] 客户端{self.client_ip}: 帧消费错误 - {str(e)}")
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async def process_frame(self, frame_data: bytes) -> None:
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"""处理图像帧（调用检测接口）"""
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nparr = np.frombuffer(frame_data, np.uint8)
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img = cv2.imdecode(nparr, cv2.IMREAD_COLOR)
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if img is None:
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print(f"[{get_current_time_str()}] 客户端{self.client_ip}: 无法解析明文图像")
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return
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try:
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# 仅保留检测调用，移除数据库记录相关逻辑
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await asyncio.to_thread(detectFrame, self.client_ip, img)
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print(f"[{get_current_time_str()}] 客户端{self.client_ip}: 图像检测调用完成")
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except Exception as e:
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print(f"[{get_current_time_str()}] 客户端{self.client_ip}: 检测调用失败 - {str(e)}")
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# ------------------------------
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# 连接管理与全局任务（基础结构不变，新增状态更新逻辑）
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# ------------------------------
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connected_clients: Dict[str, ClientConnection] = {}
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heartbeat_task: Optional[asyncio.Task] = None
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# ------------------------------
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# 心跳检查任务（超时后更新设备为下线）
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# ------------------------------
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async def heartbeat_checker():
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"""全局心跳检查（清理超时连接 + 标记设备为下线）"""
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while True:
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current_time = get_current_time_str()
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# 筛选超时连接（心跳超时且处于连接状态）
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timeout_ips = [
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ip for ip, conn in connected_clients.items()
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if conn.is_connected and not conn.is_alive()
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]
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if timeout_ips:
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print(f"[{current_time}] 心跳检查: {len(timeout_ips)}个客户端超时（IP: {timeout_ips}）")
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for ip in timeout_ips:
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try:
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conn = connected_clients[ip]
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try:
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update_success = update_online_status_by_ip(ip, OFFLINE_STATUS)
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if update_success:
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print(f"[{current_time}] 客户端{ip}: 心跳超时，设备状态更新为下线成功")
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else:
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print(f"[{current_time}] 客户端{ip}: 心跳超时，设备状态更新为下线失败")
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except Exception as e:
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print(f"[{current_time}] 客户端{ip}: 心跳超时更新下线状态异常 - {str(e)}")
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# 2. 原有逻辑：标记连接无效并清理资源
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conn.is_connected = False
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if conn.consumer_task and not conn.consumer_task.done():
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conn.consumer_task.cancel()
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await conn.websocket.close(code=1008, reason="心跳超时（30秒无响应）")
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print(f"[{current_time}] 客户端{ip}: 已关闭超时连接")
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except Exception as e:
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print(f"[{current_time}] 客户端{ip}: 超时连接清理失败 - {str(e)}")
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finally:
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# 从连接管理列表移除
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if ip in connected_clients:
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connected_clients.pop(ip, None)
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else:
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print(f"[{current_time}] 心跳检查: {len(connected_clients)}个客户端在线")
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await asyncio.sleep(HEARTBEAT_INTERVAL)
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# ------------------------------
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# 心跳确认发送（保持不变）
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# ------------------------------
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async def send_heartbeat_ack(conn: ClientConnection):
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"""发送加密的心跳确认（服务器→客户端）"""
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try:
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heartbeat_ack_msg = {
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"type": "heart",
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"timestamp": get_current_time_str(),
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"client_ip": conn.client_ip
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}
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encrypted_msg = aes_encrypt(json.dumps(heartbeat_ack_msg))
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await conn.websocket.send_json(encrypted_msg)
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print(f"[{get_current_time_str()}] 客户端{conn.client_ip}: 已发送加密心跳确认")
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return True
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except Exception as e:
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# 心跳确认失败时清理连接
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if conn.client_ip in connected_clients:
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connected_clients.pop(conn.client_ip, None)
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print(f"[{get_current_time_str()}] 客户端{conn.client_ip}: 心跳确认失败 - {str(e)}")
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return False
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# ------------------------------
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# 文本消息处理（新增：心跳时更新设备为在线）
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# ------------------------------
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async def handle_text_msg(conn: ClientConnection, text: str):
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"""处理客户端明文文本消息（心跳+状态更新）"""
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try:
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msg = json.loads(text)
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if msg.get("type") == "heart":
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# 1. 原有逻辑：更新心跳时间
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conn.update_heartbeat()
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# 2. 新增逻辑：更新设备状态为在线
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try:
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update_success = update_online_status_by_ip(conn.client_ip, ONLINE_STATUS)
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if update_success:
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print(f"[{get_current_time_str()}] 客户端{conn.client_ip}: 设备在线状态更新为在线成功")
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else:
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print(f"[{get_current_time_str()}] 客户端{conn.client_ip}: 设备在线状态更新为在线失败")
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except Exception as e:
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print(f"[{get_current_time_str()}] 客户端{conn.client_ip}: 更新在线状态时异常 - {str(e)}")
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# 3. 原有逻辑：发送心跳确认
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await send_heartbeat_ack(conn)
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else:
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print(f"[{get_current_time_str()}] 客户端{conn.client_ip}: 未知明文文本类型（{msg.get('type')}）")
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except json.JSONDecodeError:
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print(f"[{get_current_time_str()}] 客户端{conn.client_ip}: 无效JSON格式（明文文本）")
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except Exception as e:
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print(f"[{get_current_time_str()}] 客户端{conn.client_ip}: 明文文本消息处理失败 - {str(e)}")
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# ------------------------------
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# 路由与生命周期（保持不变）
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# ------------------------------
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ws_router = APIRouter()
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@asynccontextmanager
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async def lifespan(app: FastAPI):
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"""应用生命周期：启动/停止心跳任务"""
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global heartbeat_task
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# 启动心跳检查任务
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heartbeat_task = asyncio.create_task(heartbeat_checker())
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print(f"[{get_current_time_str()}] 心跳检查任务启动（ID: {id(heartbeat_task)}）")
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yield
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# 应用关闭时清理资源
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if heartbeat_task and not heartbeat_task.done():
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heartbeat_task.cancel()
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await heartbeat_task
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print(f"[{get_current_time_str()}] 心跳检查任务已取消")
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# 清理所有活跃连接 + 标记为下线
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for conn in connected_clients.values():
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conn.is_connected = False
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# 关闭前更新设备为下线
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try:
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update_online_status_by_ip(conn.client_ip, OFFLINE_STATUS)
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print(f"[{get_current_time_str()}] 客户端{conn.client_ip}: 服务关闭，设备状态更新为下线")
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except Exception as e:
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print(f"[{get_current_time_str()}] 客户端{conn.client_ip}: 服务关闭更新状态异常 - {str(e)}")
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# 原有清理逻辑
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if conn.consumer_task and not conn.consumer_task.done():
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conn.consumer_task.cancel()
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try:
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await conn.websocket.close(code=1001, reason="服务关闭")
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except Exception as e:
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print(f"[{get_current_time_str()}] 客户端{conn.client_ip}: 服务关闭时连接清理失败 - {str(e)}")
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connected_clients.clear()
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# ------------------------------
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# WebSocket端点（核心修改：连接校验 + 断开时状态更新）
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# ------------------------------
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@ws_router.websocket(WS_ENDPOINT)
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async def websocket_endpoint(websocket: WebSocket):
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"""WebSocket连接处理（新增：设备校验 + 断开下线）"""
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client_ip = websocket.client.host if websocket.client else "unknown_ip"
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current_time = get_current_time_str()
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new_conn: Optional[ClientConnection] = None # 用于后续清理
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try:
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# ------------------------------
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# 新增1：设备合法性校验（连接前拦截）
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# ------------------------------
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try:
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valid_ips = get_unique_client_ips() # 获取合法设备列表
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if_handler = get_is_need_handler_by_ip(client_ip)
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except Exception as e:
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print(f"[{current_time}] 客户端{client_ip}: 合法设备列表获取失败 - {str(e)}")
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await websocket.close(code=1011, reason="服务器内部错误（合法设备校验失败）")
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return
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if client_ip not in valid_ips:
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print(f"[{current_time}] 客户端{client_ip}: 不在合法设备列表中，拒绝连接")
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await websocket.close(code=1008, reason="未授权设备（不在合法设备列表）")
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return
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|
|
if if_handler:
|
|||
|
|
print(f"[{current_time}] 客户端{client_ip}: 设备需要处理，拒绝连接")
|
|||
|
|
await websocket.close(code=1008, reason="未授权设备（需要处理）")
|
|||
|
|
return
|
|||
|
|
|
|||
|
|
# 校验通过，接受连接
|
|||
|
|
await websocket.accept()
|
|||
|
|
print(f"[{current_time}] 客户端{client_ip}: 已接受连接请求（合法设备）")
|
|||
|
|
|
|||
|
|
# ------------------------------
|
|||
|
|
# 原有逻辑：处理旧连接替换
|
|||
|
|
# ------------------------------
|
|||
|
|
if client_ip in connected_clients:
|
|||
|
|
old_conn = connected_clients[client_ip]
|
|||
|
|
old_conn.is_connected = False
|
|||
|
|
# 旧连接下线更新（新增）
|
|||
|
|
try:
|
|||
|
|
update_online_status_by_ip(client_ip, OFFLINE_STATUS)
|
|||
|
|
print(f"[{current_time}] 客户端{client_ip}: 旧连接替换，设备状态更新为下线")
|
|||
|
|
except Exception as e:
|
|||
|
|
print(f"[{current_time}] 客户端{client_ip}: 旧连接替换更新状态异常 - {str(e)}")
|
|||
|
|
# 原有清理旧连接
|
|||
|
|
if old_conn.consumer_task and not old_conn.consumer_task.done():
|
|||
|
|
old_conn.consumer_task.cancel()
|
|||
|
|
await old_conn.websocket.close(code=1008, reason="新连接建立（替换旧连接）")
|
|||
|
|
connected_clients.pop(client_ip)
|
|||
|
|
print(f"[{current_time}] 客户端{client_ip}: 已关闭旧连接（新连接替换）")
|
|||
|
|
|
|||
|
|
# ------------------------------
|
|||
|
|
# 原有逻辑：初始化新连接
|
|||
|
|
# ------------------------------
|
|||
|
|
new_conn = ClientConnection(websocket, client_ip)
|
|||
|
|
new_conn.is_connected = True
|
|||
|
|
connected_clients[client_ip] = new_conn
|
|||
|
|
new_conn.start_consumer()
|
|||
|
|
|
|||
|
|
# 发送初始帧许可
|
|||
|
|
await new_conn.send_frame_permit()
|
|||
|
|
# 新连接上线更新（新增）
|
|||
|
|
try:
|
|||
|
|
update_online_status_by_ip(client_ip, ONLINE_STATUS)
|
|||
|
|
print(f"[{get_current_time_str()}] 客户端{client_ip}: 新连接初始化，设备状态更新为在线")
|
|||
|
|
except Exception as e:
|
|||
|
|
print(f"[{get_current_time_str()}] 客户端{client_ip}: 新连接初始化更新状态异常 - {str(e)}")
|
|||
|
|
|
|||
|
|
print(f"[{get_current_time_str()}] 客户端{client_ip}: 连接初始化完成！当前在线数: {len(connected_clients)}")
|
|||
|
|
|
|||
|
|
# ------------------------------
|
|||
|
|
# 原有逻辑：循环接收消息
|
|||
|
|
# ------------------------------
|
|||
|
|
while new_conn.is_connected:
|
|||
|
|
data = await websocket.receive()
|
|||
|
|
if "text" in data:
|
|||
|
|
await handle_text_msg(new_conn, data["text"])
|
|||
|
|
elif "bytes" in data:
|
|||
|
|
frame_data = data["bytes"]
|
|||
|
|
try:
|
|||
|
|
new_conn.frame_queue.put_nowait(frame_data)
|
|||
|
|
print(f"[{get_current_time_str()}] 客户端{client_ip}: 明文图像（{len(frame_data)}字节）入队")
|
|||
|
|
except asyncio.QueueFull:
|
|||
|
|
print(f"[{get_current_time_str()}] 客户端{client_ip}: 帧队列已满，丢弃当前图像数据")
|
|||
|
|
except Exception as e:
|
|||
|
|
print(f"[{get_current_time_str()}] 客户端{client_ip}: 明文图像处理失败 - {str(e)}")
|
|||
|
|
|
|||
|
|
# ------------------------------
|
|||
|
|
# 新增2：主动断开连接时更新下线
|
|||
|
|
# ------------------------------
|
|||
|
|
except WebSocketDisconnect as e:
|
|||
|
|
print(f"[{get_current_time_str()}] 客户端{client_ip}: 主动断开连接（代码: {e.code}）")
|
|||
|
|
# 主动断开时更新下线
|
|||
|
|
try:
|
|||
|
|
update_success = update_online_status_by_ip(client_ip, OFFLINE_STATUS)
|
|||
|
|
if update_success:
|
|||
|
|
print(f"[{get_current_time_str()}] 客户端{client_ip}: 主动断开，设备状态更新为下线成功")
|
|||
|
|
else:
|
|||
|
|
print(f"[{get_current_time_str()}] 客户端{client_ip}: 主动断开，设备状态更新为下线失败")
|
|||
|
|
except Exception as e:
|
|||
|
|
print(f"[{get_current_time_str()}] 客户端{client_ip}: 主动断开更新下线状态异常 - {str(e)}")
|
|||
|
|
|
|||
|
|
# ------------------------------
|
|||
|
|
# 原有异常处理
|
|||
|
|
# ------------------------------
|
|||
|
|
except Exception as e:
|
|||
|
|
print(f"[{get_current_time_str()}] 客户端{client_ip}: 连接异常 - {str(e)[:50]}")
|
|||
|
|
# 异常断开时更新下线（新增）
|
|||
|
|
try:
|
|||
|
|
update_online_status_by_ip(client_ip, OFFLINE_STATUS)
|
|||
|
|
print(f"[{get_current_time_str()}] 客户端{client_ip}: 异常断开，设备状态更新为下线")
|
|||
|
|
except Exception as ex:
|
|||
|
|
print(f"[{get_current_time_str()}] 客户端{client_ip}: 异常断开更新状态异常 - {str(ex)}")
|
|||
|
|
|
|||
|
|
# ------------------------------
|
|||
|
|
# 新增3：最终清理时确保状态下线
|
|||
|
|
# ------------------------------
|
|||
|
|
finally:
|
|||
|
|
# 连接结束时清理资源（仅当连接曾有效初始化）
|
|||
|
|
if client_ip in connected_clients:
|
|||
|
|
conn = connected_clients[client_ip]
|
|||
|
|
conn.is_connected = False
|
|||
|
|
# 再次确认下线（防止漏更）
|
|||
|
|
try:
|
|||
|
|
update_online_status_by_ip(client_ip, OFFLINE_STATUS)
|
|||
|
|
print(f"[{get_current_time_str()}] 客户端{client_ip}: 连接清理，设备状态确认下线")
|
|||
|
|
except Exception as e:
|
|||
|
|
print(f"[{get_current_time_str()}] 客户端{client_ip}: 连接清理确认状态异常 - {str(e)}")
|
|||
|
|
# 原有清理逻辑
|
|||
|
|
if conn.consumer_task and not conn.consumer_task.done():
|
|||
|
|
conn.consumer_task.cancel()
|
|||
|
|
connected_clients.pop(client_ip, None)
|
|||
|
|
|
|||
|
|
print(f"[{get_current_time_str()}] 客户端{client_ip}: 连接资源已清理！当前在线数: {len(connected_clients)}")
|
|||
|
|
|
|||
|
|
|
|||
|
|
# ------------------------------
|
|||
|
|
# 原有功能：客户端连接状态判断（保持不变）
|
|||
|
|
# ------------------------------
|
|||
|
|
async def send_message_to_client(client_ip: str, json_data: str) -> bool:
|
|||
|
|
"""向指定IP的客户端发送加密消息（保留基础通信能力）"""
|
|||
|
|
try:
|
|||
|
|
if client_ip not in connected_clients:
|
|||
|
|
print(f"[{get_current_time_str()}] 发送消息失败: 客户端{client_ip}不在线")
|
|||
|
|
return False
|
|||
|
|
|
|||
|
|
client_conn = connected_clients[client_ip]
|
|||
|
|
if not client_conn.is_connected or not client_conn.is_alive():
|
|||
|
|
print(f"[{get_current_time_str()}] 发送消息失败: 客户端{client_ip}连接无效（已断开/超时）")
|
|||
|
|
connected_clients.pop(client_ip, None)
|
|||
|
|
return False
|
|||
|
|
|
|||
|
|
encrypted_msg = aes_encrypt(json_data)
|
|||
|
|
await client_conn.websocket.send_json(encrypted_msg)
|
|||
|
|
parsed_data = json.loads(json_data)
|
|||
|
|
print(f"[{get_current_time_str()}] 已向客户端{client_ip}发送消息: {parsed_data.get('type')}")
|
|||
|
|
return True
|
|||
|
|
except Exception as e:
|
|||
|
|
print(f"[{get_current_time_str()}] 向客户端{client_ip}发送消息失败: {str(e)}")
|
|||
|
|
if client_ip in connected_clients:
|
|||
|
|
connected_clients.pop(client_ip, None)
|
|||
|
|
return False
|
|||
|
|
|
|||
|
|
|
|||
|
|
def is_client_connected(client_ip: str) -> bool:
|
|||
|
|
"""判断指定客户端IP是否处于有效连接状态"""
|
|||
|
|
if client_ip not in connected_clients:
|
|||
|
|
print(f"[{get_current_time_str()}] 客户端{client_ip}: 未在活跃连接列表中（连接状态：False）")
|
|||
|
|
return False
|
|||
|
|
|
|||
|
|
client_conn = connected_clients[client_ip]
|
|||
|
|
connection_valid = client_conn.is_connected and client_conn.is_alive()
|
|||
|
|
print(
|
|||
|
|
f"[{get_current_time_str()}] 客户端{client_ip}: "
|
|||
|
|
f"连接标记={client_conn.is_connected}, 心跳存活={client_conn.is_alive()}, "
|
|||
|
|
f"最终有效状态={connection_valid}"
|
|||
|
|
)
|
|||
|
|
return connection_valid
|