整体调整了功能
This commit is contained in:
750
FATrace.OEMApp/Services/SocketService.cs
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750
FATrace.OEMApp/Services/SocketService.cs
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using System;
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using System.Collections.Concurrent;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Net;
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using System.Net.Sockets;
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using System.Text;
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using System.Threading;
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using System.Threading.Tasks;
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using NLog;
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namespace FATrace.OEMApp.Services
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{
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/// <summary>
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/// Socket 服务器 - 基于原生 TcpListener 实现的多客户端 TCP 服务器
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/// 功能：接收客户端数据、解析为字符串、触发事件通知外部、支持向客户端发送数据
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/// 协议：使用 CRLF (\r\n) 作为行分隔符的文本协议
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/// 编码：UTF-8
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/// </summary>
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public class SocketService
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{
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#region 私有字段
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/// <summary>
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/// NLog 日志记录器
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/// </summary>
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private static readonly Logger Logger = LogManager.GetCurrentClassLogger();
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/// <summary>
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/// TCP 监听器
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/// </summary>
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private TcpListener _listener;
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/// <summary>
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/// 服务器是否正在运行
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/// </summary>
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private bool _isRunning = false;
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/// <summary>
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/// 取消令牌源，用于停止服务器
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/// </summary>
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private CancellationTokenSource _cts;
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/// <summary>
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/// 已连接的客户端字典（SessionId -> ClientSession）
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/// 使用线程安全的 ConcurrentDictionary
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/// </summary>
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private readonly ConcurrentDictionary<string, ClientSession> _clients = new ConcurrentDictionary<string, ClientSession>();
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/// <summary>
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/// 会话 ID 计数器
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/// </summary>
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private int _sessionIdCounter = 0;
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#endregion
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#region 公共属性
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/// <summary>
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/// 服务器监听 IP 地址
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/// 默认：127.0.0.1（本地回环）
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/// 0.0.0.0 表示监听所有网卡
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/// </summary>
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public string ListenIp { get; set; } = "127.0.0.1";
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/// <summary>
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/// 服务器监听端口
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/// 默认：6001
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/// </summary>
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public int ListenPort { get; set; } = 6001;
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/// <summary>
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/// 接收超时时间（秒）
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/// 默认：30 秒
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/// 如果客户端在此时间内无数据交互，连接将被关闭
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/// </summary>
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public int ReceiveTimeout { get; set; } = 30;
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/// <summary>
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/// 发送超时时间（秒）
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/// 默认：30 秒
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/// </summary>
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public int SendTimeout { get; set; } = 30;
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/// <summary>
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/// 服务器是否正在运行
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/// </summary>
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public bool IsRunning => _isRunning;
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/// <summary>
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/// 当前连接的客户端数量
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/// </summary>
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public int ConnectedClientCount
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{
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get
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{
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return _clients.Count;
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}
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}
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#endregion
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#region 事件定义
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/// <summary>
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/// 数据接收事件参数
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/// </summary>
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public class DataReceivedEventArgs : EventArgs
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{
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/// <summary>
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/// 会话 ID（客户端唯一标识）
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/// </summary>
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public string SessionId { get; set; }
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/// <summary>
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/// 客户端 IP 地址
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/// </summary>
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public string RemoteIp { get; set; }
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/// <summary>
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/// 客户端端口
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/// </summary>
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public int RemotePort { get; set; }
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/// <summary>
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/// 接收到的数据（已解析为字符串）
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/// </summary>
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public string Data { get; set; }
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/// <summary>
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/// 接收时间
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/// </summary>
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public DateTime ReceivedTime { get; set; }
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}
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/// <summary>
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/// 客户端连接事件参数
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/// </summary>
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public class ClientConnectedEventArgs : EventArgs
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{
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/// <summary>
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/// 会话 ID
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/// </summary>
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public string SessionId { get; set; }
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/// <summary>
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/// 客户端 IP 地址
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/// </summary>
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public string RemoteIp { get; set; }
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/// <summary>
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/// 客户端端口
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/// </summary>
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public int RemotePort { get; set; }
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/// <summary>
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/// 连接时间
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/// </summary>
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public DateTime ConnectedTime { get; set; }
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}
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/// <summary>
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/// 客户端断开事件参数
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/// </summary>
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public class ClientDisconnectedEventArgs : EventArgs
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{
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/// <summary>
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/// 会话 ID
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/// </summary>
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public string SessionId { get; set; }
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/// <summary>
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/// 客户端 IP 地址
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/// </summary>
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public string RemoteIp { get; set; }
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/// <summary>
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/// 客户端端口
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/// </summary>
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public int RemotePort { get; set; }
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/// <summary>
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/// 断开时间
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/// </summary>
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public DateTime DisconnectedTime { get; set; }
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/// <summary>
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/// 断开原因
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/// </summary>
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public string Reason { get; set; }
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}
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/// <summary>
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/// 数据接收事件
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/// 当接收到客户端数据时触发，外部可订阅此事件进行业务处理
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/// </summary>
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public event EventHandler<DataReceivedEventArgs> DataReceived;
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/// <summary>
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/// 客户端连接事件
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/// 当有新客户端连接时触发
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/// </summary>
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public event EventHandler<ClientConnectedEventArgs> ClientConnected;
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/// <summary>
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/// 客户端断开事件
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/// 当客户端断开连接时触发
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/// </summary>
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public event EventHandler<ClientDisconnectedEventArgs> ClientDisconnected;
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/// <summary>
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/// 服务器错误事件
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/// 当服务器发生错误时触发
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/// </summary>
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public event EventHandler<Exception> ServerError;
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#endregion
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#region 公共方法
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/// <summary>
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/// 启动 Socket 服务器
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/// </summary>
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/// <returns>启动是否成功</returns>
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public async Task<bool> StartAsync()
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{
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try
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{
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// 检查是否已经在运行
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if (_isRunning)
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{
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Logger.Warn("Socket 服务器已经在运行中，无需重复启动");
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return true;
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}
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Logger.Info($"正在启动 Socket 服务器，监听地址：{ListenIp}:{ListenPort}，超时时间：{ReceiveTimeout}秒");
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// 解析 IP 地址
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IPAddress ipAddress;
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if (!IPAddress.TryParse(ListenIp, out ipAddress))
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{
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Logger.Error($"无效的 IP 地址：{ListenIp}");
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return false;
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}
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// 创建 TCP 监听器
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_listener = new TcpListener(ipAddress, ListenPort);
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_listener.Start();
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// 创建取消令牌
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_cts = new CancellationTokenSource();
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_isRunning = true;
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Logger.Info($"Socket 服务器启动成功，监听地址：{ListenIp}:{ListenPort}");
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// 启动接受客户端连接的任务
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_ = Task.Run(() => AcceptClientsAsync(_cts.Token), _cts.Token);
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return true;
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}
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catch (Exception ex)
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{
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Logger.Error(ex, $"启动 Socket 服务器时发生异常：{ex.Message}");
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OnServerError(ex);
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return false;
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}
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}
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/// <summary>
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/// 停止 Socket 服务器
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/// </summary>
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/// <returns>停止任务</returns>
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public async Task StopAsync()
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{
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try
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{
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if (!_isRunning || _listener == null)
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{
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Logger.Warn("Socket 服务器未运行，无需停止");
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return;
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}
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Logger.Info("正在停止 Socket 服务器...");
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_isRunning = false;
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// 取消所有异步操作
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_cts?.Cancel();
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// 停止监听器
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_listener?.Stop();
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// 断开所有客户端
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foreach (var client in _clients.Values)
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{
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try
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{
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client.TcpClient?.Close();
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}
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catch (Exception ex)
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{
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Logger.Warn(ex, $"关闭客户端连接时发生异常：SessionId={client.SessionId}");
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}
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}
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// 清空客户端字典
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_clients.Clear();
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// 释放资源
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_cts?.Dispose();
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_cts = null;
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_listener = null;
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Logger.Info("Socket 服务器已停止");
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await Task.CompletedTask;
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}
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catch (Exception ex)
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{
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Logger.Error(ex, $"停止 Socket 服务器时发生异常：{ex.Message}");
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OnServerError(ex);
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}
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}
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/// <summary>
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/// 向指定客户端发送数据
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/// </summary>
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/// <param name="sessionId">会话 ID（客户端唯一标识）</param>
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/// <param name="data">要发送的字符串数据</param>
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/// <returns>发送是否成功</returns>
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public async Task<bool> SendToClientAsync(string sessionId, string data)
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{
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try
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{
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// 参数校验
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if (string.IsNullOrWhiteSpace(sessionId))
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{
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Logger.Warn("发送数据失败：SessionId 为空");
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return false;
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}
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if (string.IsNullOrEmpty(data))
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{
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Logger.Warn($"发送数据失败：数据为空，SessionId={sessionId}");
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return false;
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}
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// 查找会话
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if (!_clients.TryGetValue(sessionId, out var client))
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{
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Logger.Warn($"发送数据失败：未找到会话，SessionId={sessionId}");
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return false;
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}
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// 发送数据（自动添加 CRLF 行结束符）
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var dataToSend = data.EndsWith("\r\n") ? data : data + "\r\n";
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var buffer = Encoding.UTF8.GetBytes(dataToSend);
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await client.Stream.WriteAsync(buffer, 0, buffer.Length);
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await client.Stream.FlushAsync();
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Logger.Debug($"向客户端发送数据成功，SessionId={sessionId}，数据长度={buffer.Length}字节，内容={data}");
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return true;
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}
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catch (Exception ex)
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{
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Logger.Error(ex, $"向客户端发送数据时发生异常：SessionId={sessionId}，错误={ex.Message}");
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OnServerError(ex);
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return false;
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}
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}
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/// <summary>
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/// 向所有已连接的客户端广播数据
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/// </summary>
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/// <param name="data">要广播的字符串数据</param>
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/// <returns>成功发送的客户端数量</returns>
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public async Task<int> BroadcastAsync(string data)
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{
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try
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{
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if (string.IsNullOrEmpty(data))
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{
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Logger.Warn("广播数据失败：数据为空");
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return 0;
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}
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// 获取所有客户端
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var clientList = _clients.Values.ToList();
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if (clientList.Count == 0)
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{
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Logger.Debug("广播数据：当前无已连接的客户端");
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return 0;
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}
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// 准备数据
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var dataToSend = data.EndsWith("\r\n") ? data : data + "\r\n";
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var buffer = Encoding.UTF8.GetBytes(dataToSend);
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// 向所有客户端发送
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int successCount = 0;
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foreach (var client in clientList)
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{
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try
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{
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await client.Stream.WriteAsync(buffer, 0, buffer.Length);
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await client.Stream.FlushAsync();
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successCount++;
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}
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catch (Exception ex)
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{
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Logger.Error(ex, $"向客户端广播数据失败：SessionId={client.SessionId}，错误={ex.Message}");
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}
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}
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Logger.Info($"广播数据完成，成功发送到 {successCount}/{clientList.Count} 个客户端，数据长度={buffer.Length}字节");
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return successCount;
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}
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catch (Exception ex)
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{
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Logger.Error(ex, $"广播数据时发生异常：{ex.Message}");
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OnServerError(ex);
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return 0;
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}
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}
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/// <summary>
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/// 断开指定客户端的连接
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/// </summary>
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/// <param name="sessionId">会话 ID</param>
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/// <returns>断开是否成功</returns>
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public async Task<bool> DisconnectClientAsync(string sessionId)
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{
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try
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{
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if (string.IsNullOrWhiteSpace(sessionId))
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{
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Logger.Warn("断开客户端失败：SessionId 为空");
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return false;
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}
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if (!_clients.TryGetValue(sessionId, out var client))
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{
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Logger.Warn($"断开客户端失败：未找到会话，SessionId={sessionId}");
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return false;
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}
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client.TcpClient?.Close();
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_clients.TryRemove(sessionId, out _);
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Logger.Info($"已主动断开客户端连接，SessionId={sessionId}");
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return true;
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}
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catch (Exception ex)
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{
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Logger.Error(ex, $"断开客户端连接时发生异常：SessionId={sessionId}，错误={ex.Message}");
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OnServerError(ex);
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return false;
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}
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}
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/// <summary>
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/// 获取所有已连接客户端的会话 ID 列表
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||||
/// </summary>
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||||
/// <returns>会话 ID 列表</returns>
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public List<string> GetConnectedSessionIds()
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{
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return _clients.Keys.ToList();
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}
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#endregion
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#region 私有方法 - 客户端处理
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/// <summary>
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/// 接受客户端连接的循环
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/// </summary>
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private async Task AcceptClientsAsync(CancellationToken cancellationToken)
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{
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Logger.Info("开始接受客户端连接...");
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while (!cancellationToken.IsCancellationRequested && _isRunning)
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{
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||||
try
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{
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// 等待客户端连接
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||||
var tcpClient = await _listener.AcceptTcpClientAsync();
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||||
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||||
// 生成会话 ID
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||||
var sessionId = $"Session_{Interlocked.Increment(ref _sessionIdCounter)}_{DateTime.Now.Ticks}";
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||||
// 获取客户端信息
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var remoteEndPoint = tcpClient.Client.RemoteEndPoint as IPEndPoint;
|
||||
var remoteIp = remoteEndPoint?.Address.ToString() ?? "Unknown";
|
||||
var remotePort = remoteEndPoint?.Port ?? 0;
|
||||
|
||||
// 创建客户端会话
|
||||
var clientSession = new ClientSession
|
||||
{
|
||||
SessionId = sessionId,
|
||||
TcpClient = tcpClient,
|
||||
Stream = tcpClient.GetStream(),
|
||||
RemoteIp = remoteIp,
|
||||
RemotePort = remotePort,
|
||||
ConnectedTime = DateTime.Now
|
||||
};
|
||||
|
||||
// 添加到客户端字典
|
||||
if (_clients.TryAdd(sessionId, clientSession))
|
||||
{
|
||||
Logger.Info($"客户端已连接，SessionId={sessionId}，远程地址={remoteIp}:{remotePort}，当前连接数={ConnectedClientCount}");
|
||||
|
||||
// 触发客户端连接事件
|
||||
OnClientConnected(new ClientConnectedEventArgs
|
||||
{
|
||||
SessionId = sessionId,
|
||||
RemoteIp = remoteIp,
|
||||
RemotePort = remotePort,
|
||||
ConnectedTime = clientSession.ConnectedTime
|
||||
});
|
||||
|
||||
// 启动处理客户端数据的任务
|
||||
_ = Task.Run(() => HandleClientAsync(clientSession, cancellationToken), cancellationToken);
|
||||
}
|
||||
else
|
||||
{
|
||||
Logger.Warn($"添加客户端会话失败，SessionId={sessionId}");
|
||||
tcpClient.Close();
|
||||
}
|
||||
}
|
||||
catch (ObjectDisposedException)
|
||||
{
|
||||
// 监听器已被释放，正常退出
|
||||
Logger.Info("监听器已关闭，停止接受新连接");
|
||||
break;
|
||||
}
|
||||
catch (SocketException ex) when (ex.SocketErrorCode == SocketError.Interrupted)
|
||||
{
|
||||
// 监听被中断，正常退出
|
||||
Logger.Info("监听被中断，停止接受新连接");
|
||||
break;
|
||||
}
|
||||
catch (Exception ex)
|
||||
{
|
||||
Logger.Error(ex, $"接受客户端连接时发生异常：{ex.Message}");
|
||||
OnServerError(ex);
|
||||
await Task.Delay(1000, cancellationToken); // 等待一秒后重试
|
||||
}
|
||||
}
|
||||
|
||||
Logger.Info("停止接受客户端连接");
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// 处理单个客户端的数据接收
|
||||
/// </summary>
|
||||
private async Task HandleClientAsync(ClientSession client, CancellationToken cancellationToken)
|
||||
{
|
||||
var sessionId = client.SessionId;
|
||||
var stream = client.Stream;
|
||||
var reader = new StreamReader(stream, Encoding.UTF8);
|
||||
|
||||
Logger.Debug($"开始处理客户端数据，SessionId={sessionId}");
|
||||
|
||||
try
|
||||
{
|
||||
// 设置读取超时
|
||||
stream.ReadTimeout = ReceiveTimeout * 1000;
|
||||
|
||||
while (!cancellationToken.IsCancellationRequested && _isRunning)
|
||||
{
|
||||
try
|
||||
{
|
||||
// 读取一行数据（以 CRLF 或 LF 结尾）
|
||||
var line = await reader.ReadLineAsync();
|
||||
|
||||
// 如果读取到 null，表示连接已关闭
|
||||
if (line == null)
|
||||
{
|
||||
Logger.Info($"客户端连接已关闭，SessionId={sessionId}");
|
||||
break;
|
||||
}
|
||||
|
||||
// 记录接收日志
|
||||
Logger.Debug($"接收到客户端数据，SessionId={sessionId}，远程地址={client.RemoteIp}:{client.RemotePort}，数据长度={line.Length}字符，内容={line}");
|
||||
|
||||
// 触发数据接收事件
|
||||
OnDataReceived(new DataReceivedEventArgs
|
||||
{
|
||||
SessionId = sessionId,
|
||||
RemoteIp = client.RemoteIp,
|
||||
RemotePort = client.RemotePort,
|
||||
Data = line,
|
||||
ReceivedTime = DateTime.Now
|
||||
});
|
||||
}
|
||||
catch (IOException ex) when (ex.InnerException is SocketException socketEx)
|
||||
{
|
||||
// 连接被重置或超时
|
||||
Logger.Warn($"客户端连接异常，SessionId={sessionId}，错误={socketEx.SocketErrorCode}");
|
||||
break;
|
||||
}
|
||||
catch (IOException ex)
|
||||
{
|
||||
// 读取超时或其他 IO 异常
|
||||
Logger.Warn(ex, $"读取客户端数据时发生 IO 异常，SessionId={sessionId}");
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
catch (Exception ex)
|
||||
{
|
||||
Logger.Error(ex, $"处理客户端数据时发生异常，SessionId={sessionId}，错误={ex.Message}");
|
||||
OnServerError(ex);
|
||||
}
|
||||
finally
|
||||
{
|
||||
// 清理客户端连接
|
||||
try
|
||||
{
|
||||
client.TcpClient?.Close();
|
||||
_clients.TryRemove(sessionId, out _);
|
||||
|
||||
Logger.Info($"客户端已断开，SessionId={sessionId}，远程地址={client.RemoteIp}:{client.RemotePort}，当前连接数={ConnectedClientCount}");
|
||||
|
||||
// 触发客户端断开事件
|
||||
OnClientDisconnected(new ClientDisconnectedEventArgs
|
||||
{
|
||||
SessionId = sessionId,
|
||||
RemoteIp = client.RemoteIp,
|
||||
RemotePort = client.RemotePort,
|
||||
DisconnectedTime = DateTime.Now,
|
||||
Reason = "连接关闭"
|
||||
});
|
||||
}
|
||||
catch (Exception ex)
|
||||
{
|
||||
Logger.Warn(ex, $"清理客户端连接时发生异常，SessionId={sessionId}");
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region 私有方法 - 事件触发
|
||||
|
||||
/// <summary>
|
||||
/// 触发数据接收事件
|
||||
/// </summary>
|
||||
private void OnDataReceived(DataReceivedEventArgs e)
|
||||
{
|
||||
try
|
||||
{
|
||||
DataReceived?.Invoke(this, e);
|
||||
}
|
||||
catch (Exception ex)
|
||||
{
|
||||
Logger.Error(ex, $"触发 DataReceived 事件时发生异常：{ex.Message}");
|
||||
}
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// 触发客户端连接事件
|
||||
/// </summary>
|
||||
private void OnClientConnected(ClientConnectedEventArgs e)
|
||||
{
|
||||
try
|
||||
{
|
||||
ClientConnected?.Invoke(this, e);
|
||||
}
|
||||
catch (Exception ex)
|
||||
{
|
||||
Logger.Error(ex, $"触发 ClientConnected 事件时发生异常：{ex.Message}");
|
||||
}
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// 触发客户端断开事件
|
||||
/// </summary>
|
||||
private void OnClientDisconnected(ClientDisconnectedEventArgs e)
|
||||
{
|
||||
try
|
||||
{
|
||||
ClientDisconnected?.Invoke(this, e);
|
||||
}
|
||||
catch (Exception ex)
|
||||
{
|
||||
Logger.Error(ex, $"触发 ClientDisconnected 事件时发生异常：{ex.Message}");
|
||||
}
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// 触发服务器错误事件
|
||||
/// </summary>
|
||||
private void OnServerError(Exception ex)
|
||||
{
|
||||
try
|
||||
{
|
||||
ServerError?.Invoke(this, ex);
|
||||
}
|
||||
catch (Exception eventEx)
|
||||
{
|
||||
Logger.Error(eventEx, $"触发 ServerError 事件时发生异常：{eventEx.Message}");
|
||||
}
|
||||
}
|
||||
|
||||
#endregion
|
||||
|
||||
#region 内部类 - 客户端会话
|
||||
|
||||
/// <summary>
|
||||
/// 客户端会话信息
|
||||
/// </summary>
|
||||
private class ClientSession
|
||||
{
|
||||
/// <summary>
|
||||
/// 会话 ID
|
||||
/// </summary>
|
||||
public string SessionId { get; set; }
|
||||
|
||||
/// <summary>
|
||||
/// TCP 客户端
|
||||
/// </summary>
|
||||
public TcpClient TcpClient { get; set; }
|
||||
|
||||
/// <summary>
|
||||
/// 网络流
|
||||
/// </summary>
|
||||
public NetworkStream Stream { get; set; }
|
||||
|
||||
/// <summary>
|
||||
/// 远程 IP 地址
|
||||
/// </summary>
|
||||
public string RemoteIp { get; set; }
|
||||
|
||||
/// <summary>
|
||||
/// 远程端口
|
||||
/// </summary>
|
||||
public int RemotePort { get; set; }
|
||||
|
||||
/// <summary>
|
||||
/// 连接时间
|
||||
/// </summary>
|
||||
public DateTime ConnectedTime { get; set; }
|
||||
}
|
||||
|
||||
#endregion
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user