feat: 优化 WebSocket 中间件，添加消息缓冲、错误处理和性能监控功能

src/CellularManagement.WebSocket/Buffer/WebSocketMessageBuffer.cs

@@ -0,0 +1,164 @@
+using System;
+using System.Buffers;
+using System.Runtime.CompilerServices;
+
+namespace CellularManagement.WebSocket.Buffer;
+
+/// <summary>
+/// WebSocket 消息缓冲区
+/// 用于高效处理 WebSocket 消息的缓冲区实现
+/// </summary>
+public sealed class WebSocketMessageBuffer : IDisposable
+{
+    private readonly byte[] _buffer;
+    private int _position;
+    private readonly int _maxSize;
+    private bool _isDisposed;
+    private const int MinBufferSize = 1024; // 最小缓冲区大小 1KB
+    private const int MaxBufferSize = 1024 * 1024 * 10; // 最大缓冲区大小 10MB
+
+    /// <summary>
+    /// 当前缓冲区大小
+    /// </summary>
+    public int Size => _position;
+
+    /// <summary>
+    /// 缓冲区是否已满
+    /// </summary>
+    public bool IsFull => _position >= _maxSize;
+
+    /// <summary>
+    /// 构造函数
+    /// </summary>
+    /// <param name="maxSize">最大缓冲区大小</param>
+    /// <exception cref="ArgumentOutOfRangeException">当 maxSize 超出允许范围时抛出</exception>
+    public WebSocketMessageBuffer(int maxSize)
+    {
+        if (maxSize < MinBufferSize || maxSize > MaxBufferSize)
+        {
+            throw new ArgumentOutOfRangeException(nameof(maxSize), 
+                $"缓冲区大小必须在 {MinBufferSize} 到 {MaxBufferSize} 字节之间");
+        }
+
+        _maxSize = maxSize;
+        _buffer = ArrayPool<byte>.Shared.Rent(maxSize);
+        _position = 0;
+    }
+
+    /// <summary>
+    /// 尝试将数据写入缓冲区
+    /// </summary>
+    /// <param name="data">要写入的数据</param>
+    /// <param name="offset">数据偏移量</param>
+    /// <param name="count">要写入的字节数</param>
+    /// <returns>是否写入成功</returns>
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public bool TryWrite(byte[] data, int offset, int count)
+    {
+        if (_isDisposed)
+        {
+            throw new ObjectDisposedException(nameof(WebSocketMessageBuffer));
+        }
+
+        if (data == null)
+        {
+            throw new ArgumentNullException(nameof(data));
+        }
+
+        if (offset < 0 || count < 0 || offset + count > data.Length)
+        {
+            throw new ArgumentOutOfRangeException(nameof(offset));
+        }
+
+        if (_position + count > _maxSize)
+        {
+            return false;
+        }
+
+        System.Buffer.BlockCopy(data, offset, _buffer, _position, count);
+        _position += count;
+        return true;
+    }
+
+    /// <summary>
+    /// 获取当前缓冲区中的消息
+    /// </summary>
+    /// <returns>消息字节数组</returns>
+    public byte[] GetMessage()
+    {
+        if (_isDisposed)
+        {
+            throw new ObjectDisposedException(nameof(WebSocketMessageBuffer));
+        }
+
+        if (_position == 0)
+        {
+            return Array.Empty<byte>();
+        }
+
+        var result = new byte[_position];
+        System.Buffer.BlockCopy(_buffer, 0, result, 0, _position);
+        return result;
+    }
+
+    /// <summary>
+    /// 获取当前缓冲区中的消息，使用内存池
+    /// </summary>
+    /// <returns>消息字节数组的租借对象</returns>
+    public IMemoryOwner<byte> GetMessageWithMemoryPool()
+    {
+        if (_isDisposed)
+        {
+            throw new ObjectDisposedException(nameof(WebSocketMessageBuffer));
+        }
+
+        if (_position == 0)
+        {
+            return new EmptyMemoryOwner();
+        }
+
+        var memoryOwner = MemoryPool<byte>.Shared.Rent(_position);
+        var span = memoryOwner.Memory.Span;
+        for (int i = 0; i < _position; i++)
+        {
+            span[i] = _buffer[i];
+        }
+        return memoryOwner;
+    }
+
+    /// <summary>
+    /// 重置缓冲区
+    /// </summary>
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public void Reset()
+    {
+        if (_isDisposed)
+        {
+            throw new ObjectDisposedException(nameof(WebSocketMessageBuffer));
+        }
+
+        _position = 0;
+    }
+
+    /// <summary>
+    /// 释放资源
+    /// </summary>
+    public void Dispose()
+    {
+        if (!_isDisposed)
+        {
+            ArrayPool<byte>.Shared.Return(_buffer);
+            _isDisposed = true;
+        }
+    }
+
+    private sealed class EmptyMemoryOwner : IMemoryOwner<byte>
+    {
+        public Memory<byte> Memory => Memory<byte>.Empty;
+
+        public void Dispose()
+        {
+            // 空实现，因为 Empty 不需要释放
+        }
+    }
+} 

src/CellularManagement.WebSocket/Connection/ConnectionManagerCoordinator.cs

@@ -79,6 +79,7 @@ public class ConnectionManagerCoordinator
             _processingSemaphore.Release();
             _logger.LogDebug("结束处理连接，连接ID：{ConnectionId}", connectionId);
         }
+        await Task.CompletedTask.ConfigureAwait(false);
     }
 
     /// <summary>

src/CellularManagement.WebSocket/Handler/WebSocketErrorHandler.cs

@@ -0,0 +1,49 @@
+using System;
+using System.Threading.Tasks;
+using Microsoft.Extensions.Logging;
+
+namespace CellularManagement.WebSocket.Handler;
+
+/// <summary>
+/// WebSocket 错误处理器
+/// 提供错误处理和重试机制
+/// </summary>
+public class WebSocketErrorHandler
+{
+    private readonly ILogger _logger;
+    private readonly int _maxRetries;
+    private readonly TimeSpan _retryDelay;
+
+    public WebSocketErrorHandler(ILogger logger, int maxRetries = 3, TimeSpan? retryDelay = null)
+    {
+        _logger = logger;
+        _maxRetries = maxRetries;
+        _retryDelay = retryDelay ?? TimeSpan.FromSeconds(1);
+    }
+
+    /// <summary>
+    /// 使用重试机制执行操作
+    /// </summary>
+    /// <param name="action">要执行的操作</param>
+    /// <returns>操作是否成功</returns>
+    public async Task<bool> HandleWithRetryAsync(Func<Task> action)
+    {
+        for (int i = 0; i < _maxRetries; i++)
+        {
+            try
+            {
+                await action();
+                return true;
+            }
+            catch (Exception ex)
+            {
+                _logger.LogWarning(ex, "操作失败，重试 {RetryCount}/{MaxRetries}", i + 1, _maxRetries);
+                if (i < _maxRetries - 1)
+                {
+                    await Task.Delay(_retryDelay);
+                }
+            }
+        }
+        return false;
+    }
+} 

src/CellularManagement.WebSocket/Middleware/WebSocketMiddleware.cs

@@ -5,22 +5,83 @@ using Microsoft.AspNetCore.Http;
 using Microsoft.Extensions.Logging;
 using System.Diagnostics;
 using Microsoft.Extensions.Options;
+using System.Buffers;
+using System.Collections.Concurrent;
+using System.Threading;
+using CellularManagement.WebSocket.Buffer;
+using CellularManagement.WebSocket.Handler;
+using CellularManagement.WebSocket.Monitor;
+using System.Threading.Channels;
+using Microsoft.Extensions.ObjectPool;
 
 namespace CellularManagement.WebSocket.Middleware;
 
 /// <summary>
 /// WebSocket 中间件
-/// 负责处理 WebSocket 连接的建立和消息的接收
+/// 负责处理 WebSocket 连接的建立、消息的接收和处理
 /// </summary>
+/// <remarks>
+/// 主要功能：
+/// 1. 管理 WebSocket 连接的生命周期
+/// 2. 处理消息的接收和发送
+/// 3. 实现消息队列和背压机制
+/// 4. 提供性能监控和错误处理
+/// 5. 使用对象池优化资源使用
+/// </remarks>
+/// WebSocket 关闭状态码说明：
+/// 1000 (NormalClosure): 正常关闭，表示连接在请求完成后正常关闭
+/// 1001 (EndpointUnavailable): 终端不可用，表示服务器或客户端将被移除
+/// 1002 (ProtocolError): 协议错误，表示因为协议错误而终止连接
+/// 1003 (InvalidMessageType): 消息类型错误，表示无法接受接收到的数据类型
+/// 1007 (InvalidPayloadData): 数据格式错误，表示收到了与消息类型不一致的数据
+/// 1008 (PolicyViolation): 策略违规，表示收到了违反策略的消息
+/// 1009 (MessageTooBig): 消息过大，表示消息超出处理能力
+/// 1011 (InternalServerError): 服务器内部错误，表示服务器发生内部错误
+/// </remarks>
+/// <example>
+/// 使用示例：
+/// <code>
+/// // 在 Startup.cs 中注册中间件
+/// app.UseWebSocketServer();
+/// 
+/// // 配置 WebSocket 选项
+/// services.Configure<WebSocketOptions>(options =>
+/// {
+///     options.MaxMessageSize = 1024 * 1024; // 1MB
+///     options.MaxQueueSize = 1000;
+/// });
+/// 
+/// // 关闭连接示例
+/// // 正常关闭连接
+/// await webSocket.CloseAsync(WebSocketCloseStatus.NormalClosure, "正常关闭", CancellationToken.None);
+/// 
+/// // 消息过大时关闭
+/// await webSocket.CloseAsync(WebSocketCloseStatus.MessageTooBig, "消息过大", CancellationToken.None);
+/// 
+/// // 服务器错误时关闭
+/// await webSocket.CloseAsync(WebSocketCloseStatus.InternalServerError, "服务器错误", CancellationToken.None);
+/// </code>
+/// </example>
 public class WebSocketMiddleware
 {
     private readonly RequestDelegate _next;
     private readonly IWebSocketConnectionManager _connectionManager;
     private readonly IWebSocketMessageQueueManager _messageQueueManager;
     private readonly ILogger<WebSocketMiddleware> _logger;
-    private readonly int _bufferSize = 1024 * 4;
     private readonly WebSocketOptions _options;
+    private readonly WebSocketMessageBuffer _messageBuffer;
+    private readonly WebSocketErrorHandler _errorHandler;
+    private readonly WebSocketPerformanceMonitor _performanceMonitor;
+    private readonly ObjectPool<Channel<WebSocketMessage>> _channelPool;
 
+    /// <summary>
+    /// 构造函数
+    /// </summary>
+    /// <param name="next">请求委托</param>
+    /// <param name="connectionManager">连接管理器</param>
+    /// <param name="messageQueueManager">消息队列管理器</param>
+    /// <param name="logger">日志记录器</param>
+    /// <param name="options">WebSocket 配置选项</param>
     public WebSocketMiddleware(
         RequestDelegate next,
         IWebSocketConnectionManager connectionManager,
@@ -33,7 +94,13 @@ public class WebSocketMiddleware
         _messageQueueManager = messageQueueManager;
         _logger = logger;
         _options = options.Value;
-        _logger.LogInformation("初始化 WebSocket 中间件，缓冲区大小：{BufferSize}字节", _bufferSize);
+        _messageBuffer = new WebSocketMessageBuffer(_options.MaxMessageSize);
+        _errorHandler = new WebSocketErrorHandler(logger, _options.MessageRetryCount, _options.MessageRetryInterval);
+        _performanceMonitor = new WebSocketPerformanceMonitor(logger);
+        
+        // 创建 Channel 对象池，用于复用消息通道
+        _channelPool = new DefaultObjectPool<Channel<WebSocketMessage>>(
+            new ChannelPooledObjectPolicy());
     }
 
     /// <summary>
@@ -81,109 +148,387 @@ public class WebSocketMiddleware
     /// <summary>
     /// 处理 WebSocket 连接
     /// </summary>
+    /// <param name="webSocket">WebSocket 连接实例</param>
+    /// <param name="connectionId">连接的唯一标识符</param>
+    /// <remarks>
+    /// 该方法负责处理单个 WebSocket 连接的完整生命周期：
+    /// 1. 初始化连接资源（缓冲区、消息通道等）
+    /// 2. 启动消息处理循环
+    /// 3. 处理消息接收
+    /// 4. 完成消息处理
+    /// 5. 清理资源
+    /// </remarks>
     private async Task HandleWebSocketConnection(System.Net.WebSockets.WebSocket webSocket, string connectionId)
     {
         _logger.LogInformation("开始处理 WebSocket 连接，连接ID：{ConnectionId}", connectionId);
         
-        var stopwatch = new Stopwatch();
-        var messageCount = 0;
-        var totalBytes = 0L;
+        // 使用原子操作的状态标志，确保线程安全
+        var processingState = new AtomicBoolean(false);
+        // 从内存池租借缓冲区，用于接收消息
+        var buffer = ArrayPool<byte>.Shared.Rent(1024 * 4);
+        // 从对象池获取消息通道
+        var messageChannel = _channelPool.Get();
 
-        using var messageStream = new MemoryStream();
-        var buffer = new byte[_bufferSize];
-        var receiveResult = await webSocket.ReceiveAsync(
-            new ArraySegment<byte>(buffer), CancellationToken.None);
+        try
+        {
+            // 创建取消令牌源，设置连接超时
+            using var cts = new CancellationTokenSource(_options.ConnectionTimeout);
+            var messageStartTime = DateTime.UtcNow;
 
-        while (!receiveResult.CloseStatus.HasValue)
+            // 启动消息处理循环，异步处理接收到的消息
+            var processTask = StartMessageProcessingLoop(messageChannel, processingState, cts.Token);
+
+            // 处理消息接收，包括消息的接收、解析和处理
+            await ProcessWebSocketMessages(webSocket, connectionId, buffer, messageChannel, 
+                messageStartTime, cts.Token);
+
+            // 完成消息处理，等待所有消息处理完成
+            await CompleteMessageProcessing(messageChannel, processingState, cts.Token);
+        }
+        finally
+        {
+            // 释放资源
+            ArrayPool<byte>.Shared.Return(buffer);
+            _channelPool.Return(messageChannel);
+            await CloseWebSocketIfOpen(webSocket);
+        }
+    }
+
+    /// <summary>
+    /// 启动消息处理循环
+    /// </summary>
+    /// <param name="messageChannel">消息通道</param>
+    /// <param name="processingState">处理状态标志</param>
+    /// <param name="cancellationToken">取消令牌</param>
+    /// <returns>处理任务</returns>
+    /// <remarks>
+    /// 该方法负责：
+    /// 1. 从消息通道读取消息
+    /// 2. 使用原子操作确保消息处理的线程安全
+    /// 3. 将消息加入处理队列
+    /// 4. 处理队列满时的重试逻辑
+    /// </remarks>
+    private Task StartMessageProcessingLoop(
+        Channel<WebSocketMessage> messageChannel,
+        AtomicBoolean processingState,
+        CancellationToken cancellationToken)
+    {
+        return Task.Run(async () =>
         {
+            _logger.LogInformation("开始消息处理循环");
             try
             {
-                stopwatch.Start();
+                // 使用异步流读取所有消息，直到通道关闭或取消
+                await foreach (var message in messageChannel.Reader.ReadAllAsync(cancellationToken))
+                {
+                    _logger.LogDebug("收到新消息，连接ID：{ConnectionId}，消息类型：{MessageType}", 
+                        message.ConnectionId, message.MessageType);
 
-                // 检查消息大小
-                if (messageStream.Length + receiveResult.Count > _options.MaxMessageSize)
+                    // 使用原子操作设置处理状态，确保同一时间只有一个消息在处理
+                    if (!processingState.Set(true))
                     {
-                    _logger.LogWarning("消息大小超过限制，连接ID：{ConnectionId}，当前大小：{CurrentSize}，最大限制：{MaxSize}",
-                        connectionId, messageStream.Length + receiveResult.Count, _options.MaxMessageSize);
-                    await webSocket.CloseAsync(
-                        WebSocketCloseStatus.MessageTooBig,
-                        "Message too big",
-                        CancellationToken.None);
+                        try
+                        {
+                            // 尝试将消息加入处理队列
+                            if (!await _messageQueueManager.TryQueueIncomingMessage(message))
+                            {
+                                _logger.LogWarning("消息队列已满，消息将重新入队，连接ID：{ConnectionId}", 
+                                    message.ConnectionId);
+                                // 如果队列已满，将消息重新写入通道并等待一段时间后重试
+                                await messageChannel.Writer.WriteAsync(message, cancellationToken);
+                                await Task.Delay(100, cancellationToken);
+                            }
+                            else
+                            {
+                                _logger.LogDebug("消息已成功加入处理队列，连接ID：{ConnectionId}", 
+                                    message.ConnectionId);
+                            }
+                        }
+                        finally
+                        {
+                            // 无论处理成功与否，都重置处理状态
+                            processingState.Set(false);
+                        }
+                    }
+                    else
+                    {
+                        _logger.LogDebug("消息正在处理中，跳过当前消息，连接ID：{ConnectionId}", 
+                            message.ConnectionId);
+                    }
+                }
+            }
+            catch (OperationCanceledException)
+            {
+                _logger.LogInformation("消息处理循环已取消");
+            }
+            catch (Exception ex)
+            {
+                // 记录处理循环中的异常
+                _logger.LogError(ex, "消息处理循环发生错误，连接ID：{ConnectionId}", 
+                    messageChannel.Reader.Completion.IsCompleted);
+            }
+            finally
+            {
+                _logger.LogInformation("消息处理循环已结束");
+            }
+        }, cancellationToken);
+    }
+
+    /// <summary>
+    /// 处理 WebSocket 消息
+    /// </summary>
+    /// <param name="webSocket">WebSocket 连接实例</param>
+    /// <param name="connectionId">连接ID</param>
+    /// <param name="buffer">接收缓冲区</param>
+    /// <param name="messageChannel">消息通道</param>
+    /// <param name="messageStartTime">消息开始时间</param>
+    /// <param name="cancellationToken">取消令牌</param>
+    /// <remarks>
+    /// 该方法负责：
+    /// 1. 接收 WebSocket 消息
+    /// 2. 检查消息超时
+    /// 3. 处理不同类型的消息（文本、二进制、关闭等）
+    /// 4. 将消息写入处理通道
+    /// </remarks>
+    private async Task ProcessWebSocketMessages(
+        System.Net.WebSockets.WebSocket webSocket,
+        string connectionId,
+        byte[] buffer,
+        Channel<WebSocketMessage> messageChannel,
+        DateTime messageStartTime,
+        CancellationToken cancellationToken)
+    {
+        _logger.LogInformation("开始处理 WebSocket 消息，连接ID：{ConnectionId}", connectionId);
+        
+        // 接收第一条消息
+        var receiveResult = await webSocket.ReceiveAsync(
+            new ArraySegment<byte>(buffer), cancellationToken);
+        _logger.LogDebug("收到第一条消息，连接ID：{ConnectionId}，消息类型：{MessageType}", 
+            connectionId, receiveResult.MessageType);
+
+        // 循环处理消息，直到收到关闭消息或发生错误
+        while (!receiveResult.CloseStatus.HasValue)
+        {
+            // 检查消息是否超时
+            if (IsMessageTimeout(messageStartTime))
+            {
+                _logger.LogWarning("消息处理超时，连接ID：{ConnectionId}，已处理时间：{ElapsedTime}ms", 
+                    connectionId, (DateTime.UtcNow - messageStartTime).TotalMilliseconds);
+                await HandleMessageTimeout(webSocket, connectionId, cancellationToken);
                 return;
             }
 
-                // 处理消息分片
-                if (receiveResult.MessageType == WebSocketMessageType.Text || 
-                    receiveResult.MessageType == WebSocketMessageType.Binary)
+            // 处理关闭消息
+            if (receiveResult.MessageType == WebSocketMessageType.Close)
+            {
+                _logger.LogInformation("收到关闭消息，连接ID：{ConnectionId}，关闭状态：{CloseStatus}", 
+                    connectionId, receiveResult.CloseStatus);
+                await HandleCloseMessage(webSocket, receiveResult, cancellationToken);
+                break;
+            }
+
+            // 处理有效消息类型（文本或二进制）
+            if (IsValidMessageType(receiveResult.MessageType))
+            {
+                _logger.LogDebug("处理消息，连接ID：{ConnectionId}，消息类型：{MessageType}，消息大小：{MessageSize}字节", 
+                    connectionId, receiveResult.MessageType, receiveResult.Count);
+                await ProcessMessage(webSocket, connectionId, buffer, receiveResult, 
+                    messageChannel, messageStartTime, cancellationToken);
+            }
+            else
+            {
+                _logger.LogWarning("收到无效消息类型，连接ID：{ConnectionId}，消息类型：{MessageType}", 
+                    connectionId, receiveResult.MessageType);
+            }
+
+            // 接收下一条消息
+            receiveResult = await webSocket.ReceiveAsync(
+                new ArraySegment<byte>(buffer), cancellationToken);
+            _logger.LogDebug("接收下一条消息，连接ID：{ConnectionId}，消息类型：{MessageType}", 
+                connectionId, receiveResult.MessageType);
+        }
+
+        _logger.LogInformation("WebSocket 消息处理完成，连接ID：{ConnectionId}", connectionId);
+    }
+
+    /// <summary>
+    /// 处理单个消息
+    /// </summary>
+    /// <param name="webSocket">WebSocket 连接实例</param>
+    /// <param name="connectionId">连接ID</param>
+    /// <param name="buffer">接收缓冲区</param>
+    /// <param name="receiveResult">接收结果</param>
+    /// <param name="messageChannel">消息通道</param>
+    /// <param name="messageStartTime">消息开始时间</param>
+    /// <param name="cancellationToken">取消令牌</param>
+    /// <remarks>
+    /// 该方法负责：
+    /// 1. 将接收到的数据写入消息缓冲区
+    /// 2. 检查消息是否完整
+    /// 3. 创建消息对象并写入通道
+    /// 4. 记录性能指标
+    /// </remarks>
+    private async Task ProcessMessage(
+        System.Net.WebSockets.WebSocket webSocket,
+        string connectionId,
+        byte[] buffer,
+        WebSocketReceiveResult receiveResult,
+        Channel<WebSocketMessage> messageChannel,
+        DateTime messageStartTime,
+        CancellationToken cancellationToken)
+    {
+        var processingStartTime = DateTime.UtcNow;
+
+        var success = await _errorHandler.HandleWithRetryAsync(async () =>
+        {
+            if (!_messageBuffer.TryWrite(buffer, 0, receiveResult.Count))
             {
-                    await messageStream.WriteAsync(buffer, 0, receiveResult.Count);
+                throw new WebSocketException("消息缓冲区溢出");
+            }
 
             if (receiveResult.EndOfMessage)
             {
                 var message = new WebSocketMessage
                 {
                     ConnectionId = connectionId,
-                            Data = messageStream.ToArray(),
+                    Data = _messageBuffer.GetMessage(),
                     MessageType = receiveResult.MessageType,
                     IsComplete = true
                 };
 
-                        // 使用背压机制
-                        if (!await _messageQueueManager.TryQueueIncomingMessage(message))
-                        {
-                            _logger.LogWarning("消息队列已满，等待处理，连接ID：{ConnectionId}", connectionId);
-                            await Task.Delay(100); // 等待队列处理
-                            continue;
+                await messageChannel.Writer.WriteAsync(message, cancellationToken);
+
+                var processingTime = (DateTime.UtcNow - processingStartTime).TotalMilliseconds;
+                _performanceMonitor.RecordMessage(
+                    connectionId,
+                    message.Data.Length,
+                    (long)processingTime);
+
+                _messageBuffer.Reset();
+                messageStartTime = DateTime.UtcNow;
             }
+        });
 
-                        messageCount++;
-                        totalBytes += messageStream.Length;
-                        messageStream.SetLength(0);
+        if (!success)
+        {
+            await HandleMessageProcessingFailure(webSocket, connectionId, cancellationToken);
         }
     }
-                else if (receiveResult.MessageType == WebSocketMessageType.Close)
+
+    /// <summary>
+    /// 完成消息处理
+    /// </summary>
+    /// <param name="messageChannel">消息通道</param>
+    /// <param name="processingState">处理状态标志</param>
+    /// <param name="cancellationToken">取消令牌</param>
+    /// <remarks>
+    /// 该方法负责：
+    /// 1. 完成消息写入
+    /// 2. 等待所有消息处理完成
+    /// 3. 确保资源正确释放
+    /// </remarks>
+    private async Task CompleteMessageProcessing(
+        Channel<WebSocketMessage> messageChannel,
+        AtomicBoolean processingState,
+        CancellationToken cancellationToken)
     {
-                    await webSocket.CloseAsync(
-                        receiveResult.CloseStatus.Value,
-                        receiveResult.CloseStatusDescription,
-                        CancellationToken.None);
-                    break;
-                }
+        _logger.LogInformation("开始完成消息处理");
         
-                stopwatch.Stop();
+        // 标记消息通道写入完成，不再接受新消息
+        messageChannel.Writer.Complete();
+        _logger.LogDebug("消息通道写入已完成");
 
-                // 记录性能指标
-                if (messageCount % 100 == 0)
+        // 等待所有消息处理完成
+        // 1. 检查消息通道是否完全关闭
+        // 2. 检查是否还有消息正在处理
+        while (!messageChannel.Reader.Completion.IsCompleted || processingState.Value)
         {
-                    _logger.LogInformation(
-                        "连接性能统计，连接ID：{ConnectionId}，消息数：{MessageCount}，总字节数：{TotalBytes}，" +
-                        "平均处理时间：{AverageTime}ms，吞吐量：{Throughput}MB/s",
-                        connectionId,
-                        messageCount,
-                        totalBytes,
-                        stopwatch.ElapsedMilliseconds / messageCount,
-                        (totalBytes / 1024.0 / 1024.0) / (stopwatch.ElapsedMilliseconds / 1000.0));
+            _logger.LogDebug("等待消息处理完成，通道状态：{ChannelStatus}，处理状态：{ProcessingStatus}", 
+                messageChannel.Reader.Completion.IsCompleted ? "已完成" : "处理中",
+                processingState.Value ? "处理中" : "空闲");
+            // 每100毫秒检查一次状态
+            await Task.Delay(100, cancellationToken);
         }
 
-                receiveResult = await webSocket.ReceiveAsync(
-                    new ArraySegment<byte>(buffer), CancellationToken.None);
+        _logger.LogInformation("消息处理已完成");
     }
-            catch (Exception ex)
+
+    /// <summary>
+    /// 关闭 WebSocket 连接（如果处于打开状态）
+    /// </summary>
+    /// <param name="webSocket">WebSocket 连接实例</param>
+    /// <remarks>
+    /// 该方法负责：
+    /// 1. 检查连接状态
+    /// 2. 如果连接处于打开状态，则正常关闭
+    /// </remarks>
+    private async Task CloseWebSocketIfOpen(System.Net.WebSockets.WebSocket webSocket)
     {
-                _logger.LogError(ex, "处理消息时发生错误，连接ID：{ConnectionId}，错误信息：{ErrorMessage}",
-                    connectionId, ex.Message);
-                throw;
+        if (webSocket.State == WebSocketState.Open)
+        {
+            await webSocket.CloseAsync(
+                WebSocketCloseStatus.NormalClosure,
+                "Connection closed",
+                CancellationToken.None);
         }
     }
 
-        _logger.LogInformation("收到关闭请求，连接ID：{ConnectionId}，关闭状态：{CloseStatus}，描述：{CloseDescription}",
-            connectionId, receiveResult.CloseStatus, receiveResult.CloseStatusDescription);
+    /// <summary>
+    /// 检查消息是否超时
+    /// </summary>
+    private bool IsMessageTimeout(DateTime messageStartTime) =>
+        DateTime.UtcNow - messageStartTime > _options.MessageSendTimeout;
+
+    /// <summary>
+    /// 检查消息类型是否有效
+    /// </summary>
+    private bool IsValidMessageType(WebSocketMessageType messageType) =>
+        messageType == WebSocketMessageType.Text || messageType == WebSocketMessageType.Binary;
+
+    /// <summary>
+    /// 处理消息超时
+    /// </summary>
+    private async Task HandleMessageTimeout(
+        System.Net.WebSockets.WebSocket webSocket,
+        string connectionId,
+        CancellationToken cancellationToken)
+    {
+        _logger.LogWarning("消息处理超时，连接ID：{ConnectionId}，关闭连接", connectionId);
+        await webSocket.CloseAsync(
+            WebSocketCloseStatus.EndpointUnavailable,
+            "Message timeout",
+            cancellationToken);
+    }
 
+    /// <summary>
+    /// 处理关闭消息
+    /// </summary>
+    private async Task HandleCloseMessage(
+        System.Net.WebSockets.WebSocket webSocket,
+        WebSocketReceiveResult receiveResult,
+        CancellationToken cancellationToken)
+    {
+        _logger.LogInformation("处理关闭消息，关闭状态：{CloseStatus}，描述：{Description}", 
+            receiveResult.CloseStatus, receiveResult.CloseStatusDescription);
         await webSocket.CloseAsync(
             receiveResult.CloseStatus.Value,
             receiveResult.CloseStatusDescription,
-            CancellationToken.None);
-        _logger.LogInformation("连接已关闭，连接ID：{ConnectionId}", connectionId);
+            cancellationToken);
+    }
+
+    /// <summary>
+    /// 处理消息处理失败
+    /// </summary>
+    private async Task HandleMessageProcessingFailure(
+        System.Net.WebSockets.WebSocket webSocket,
+        string connectionId,
+        CancellationToken cancellationToken)
+    {
+        _logger.LogError("消息处理失败，连接ID：{ConnectionId}，关闭连接", connectionId);
+        await webSocket.CloseAsync(
+            WebSocketCloseStatus.InternalServerError,
+            "Message processing failed",
+            cancellationToken);
     }
 
     /// <summary>
@@ -210,4 +555,68 @@ public class WebSocketMiddleware
             _logger.LogError(ex, "关闭 WebSocket 连接时发生错误，错误信息：{ErrorMessage}", ex.Message);
         }
     }
+
+    /// <summary>
+    /// 原子布尔值
+    /// </summary>
+    private sealed class AtomicBoolean
+    {
+        private int _value;
+
+        public AtomicBoolean(bool initialValue)
+        {
+            _value = initialValue ? 1 : 0;
+        }
+
+        public bool Value => Interlocked.CompareExchange(ref _value, 1, 1) == 1;
+
+        public bool Set(bool value)
+        {
+            return Interlocked.Exchange(ref _value, value ? 1 : 0) == 1;
+        }
+    }
+}
+
+/// <summary>
+/// Channel 对象池策略
+/// </summary>
+/// <remarks>
+/// 该策略类负责：
+/// 1. 创建新的 Channel 实例
+/// 2. 检查 Channel 是否可以重用
+/// 3. 重置 Channel 状态
+/// </remarks>
+public class ChannelPooledObjectPolicy : IPooledObjectPolicy<Channel<WebSocketMessage>>
+{
+    /// <summary>
+    /// 创建新的 Channel 实例
+    /// </summary>
+    public Channel<WebSocketMessage> Create()
+    {
+        return Channel.CreateUnbounded<WebSocketMessage>(new UnboundedChannelOptions 
+        { 
+            SingleReader = true,    // 单一读取器，确保消息顺序处理
+            SingleWriter = false    // 允许多个写入器，支持并发写入
+        });
+    }
+
+    /// <summary>
+    /// 检查 Channel 是否可以重用
+    /// </summary>
+    public bool Return(Channel<WebSocketMessage> obj)
+    {
+        // 检查 Channel 是否已关闭
+        if (obj.Reader.Completion.IsCompleted)
+        {
+            return false;
+        }
+
+        // 重置 Channel 状态
+        if (obj.Writer.TryComplete())
+        {
+            return true;
+        }
+
+        return false;
+    }
 } 

src/CellularManagement.WebSocket/Monitor/WebSocketPerformanceMonitor.cs

@@ -0,0 +1,104 @@
+using System;
+using System.Collections.Concurrent;
+using System.Threading;
+using Microsoft.Extensions.Logging;
+
+namespace CellularManagement.WebSocket.Monitor;
+
+/// <summary>
+/// WebSocket 性能监控器
+/// 用于收集和记录 WebSocket 连接的性能指标
+/// </summary>
+public class WebSocketPerformanceMonitor
+{
+    private readonly ILogger _logger;
+    private readonly ConcurrentDictionary<string, ConnectionMetrics> _metrics = new();
+
+    public class ConnectionMetrics
+    {
+        private long _totalMessages;
+        private long _totalBytes;
+        private long _processingTime;
+        private int _errorCount;
+
+        public long TotalMessages => _totalMessages;
+        public long TotalBytes => _totalBytes;
+        public long ProcessingTime => _processingTime;
+        public long LastMessageTime { get; set; }
+        public int ErrorCount => _errorCount;
+
+        public void IncrementMessages() => Interlocked.Increment(ref _totalMessages);
+        public void AddBytes(long bytes) => Interlocked.Add(ref _totalBytes, bytes);
+        public void AddProcessingTime(long time) => Interlocked.Add(ref _processingTime, time);
+        public void IncrementErrors() => Interlocked.Increment(ref _errorCount);
+    }
+
+    public WebSocketPerformanceMonitor(ILogger logger)
+    {
+        _logger = logger;
+    }
+
+    /// <summary>
+    /// 记录消息处理性能指标
+    /// </summary>
+    /// <param name="connectionId">连接ID</param>
+    /// <param name="messageSize">消息大小</param>
+    /// <param name="processingTime">处理时间（毫秒）</param>
+    public void RecordMessage(string connectionId, int messageSize, long processingTime)
+    {
+        var metrics = _metrics.GetOrAdd(connectionId, _ => new ConnectionMetrics());
+        metrics.IncrementMessages();
+        metrics.AddBytes(messageSize);
+        metrics.AddProcessingTime(processingTime);
+        metrics.LastMessageTime = DateTime.UtcNow.Ticks;
+
+        if (metrics.TotalMessages % 100 == 0)
+        {
+            LogMetrics(connectionId, metrics);
+        }
+    }
+
+    /// <summary>
+    /// 记录错误
+    /// </summary>
+    /// <param name="connectionId">连接ID</param>
+    public void RecordError(string connectionId)
+    {
+        if (_metrics.TryGetValue(connectionId, out var metrics))
+        {
+            metrics.IncrementErrors();
+        }
+    }
+
+    /// <summary>
+    /// 获取连接的性能指标
+    /// </summary>
+    /// <param name="connectionId">连接ID</param>
+    /// <returns>性能指标</returns>
+    public ConnectionMetrics GetMetrics(string connectionId)
+    {
+        return _metrics.TryGetValue(connectionId, out var metrics) ? metrics : null;
+    }
+
+    /// <summary>
+    /// 清理连接的性能指标
+    /// </summary>
+    /// <param name="connectionId">连接ID</param>
+    public void ClearMetrics(string connectionId)
+    {
+        _metrics.TryRemove(connectionId, out _);
+    }
+
+    private void LogMetrics(string connectionId, ConnectionMetrics metrics)
+    {
+        _logger.LogInformation(
+            "连接性能指标 - ID: {ConnectionId}, 消息数: {MessageCount}, " +
+            "总字节数: {TotalBytes}, 平均处理时间: {AvgProcessingTime}ms, " +
+            "错误数: {ErrorCount}",
+            connectionId,
+            metrics.TotalMessages,
+            metrics.TotalBytes,
+            metrics.ProcessingTime / metrics.TotalMessages,
+            metrics.ErrorCount);
+    }
+}