修复数据库连接数过多导致程序崩溃问题

src/Controllers/ManagementController.cs

@@ -358,5 +358,32 @@ namespace iFileProxy.Controllers
                 });
             }
         }
+
+        /// <summary>
+        /// 获取数据库连接池状态
+        /// </summary>
+        [HttpGet("GetConnectionPoolInfo")]
+        public async Task<ActionResult<CommonRsp>> GetConnectionPoolInfo()
+        {
+            try
+            {
+                var poolInfo = await _dbGateService.GetConnectionPoolInfoAsync();
+                return Ok(new CommonRsp
+                {
+                    Retcode = 0,
+                    Message = "success",
+                    Data = poolInfo
+                });
+            }
+            catch (Exception ex)
+            {
+                _logger.Error($"获取连接池信息失败: {ex.Message}");
+                return Ok(new CommonRsp
+                {
+                    Retcode = 1,
+                    Message = "获取连接池信息失败"
+                });
+            }
+        }
     }
 }

src/Models/Db.cs

@@ -106,4 +106,81 @@ namespace iFileProxy.Models
         public static string iFileProxy = "iFileProxy_Db";
 
     }
+
+    /// <summary>
+    /// 数据库连接池信息
+    /// </summary>
+    public class ConnectionPoolInfo
+    {
+        /// <summary>
+        /// 当前总连接数
+        /// </summary>
+        public long TotalConnections { get; set; }
+
+        /// <summary>
+        /// 活跃连接数
+        /// </summary>
+        public long ActiveConnections { get; set; }
+
+        /// <summary>
+        /// 空闲连接数
+        /// </summary>
+        public long SleepingConnections { get; set; }
+
+        /// <summary>
+        /// 连接池最大连接数
+        /// </summary>
+        public int MaxPoolSize { get; set; }
+
+        /// <summary>
+        /// 连接详情列表
+        /// </summary>
+        public List<ProcessListInfo> Connections { get; set; } = [];
+    }
+
+    /// <summary>
+    /// MySQL 进程列表信息
+    /// </summary>
+    public class ProcessListInfo
+    {
+        /// <summary>
+        /// 连接ID
+        /// </summary>
+        public long Id { get; set; }
+
+        /// <summary>
+        /// 用户名
+        /// </summary>
+        public string User { get; set; } = string.Empty;
+
+        /// <summary>
+        /// 主机信息
+        /// </summary>
+        public string Host { get; set; } = string.Empty;
+
+        /// <summary>
+        /// 数据库名
+        /// </summary>
+        public string Db { get; set; } = string.Empty;
+
+        /// <summary>
+        /// 命令类型
+        /// </summary>
+        public string Command { get; set; } = string.Empty;
+
+        /// <summary>
+        /// 执行时间(秒)
+        /// </summary>
+        public long Time { get; set; }
+
+        /// <summary>
+        /// 连接状态
+        /// </summary>
+        public string State { get; set; } = string.Empty;
+
+        /// <summary>
+        /// 执行的SQL
+        /// </summary>
+        public string Info { get; set; } = string.Empty;
+    }
 }

src/Program.cs

@@ -16,18 +16,18 @@ namespace iFileProxy
             SerilogConfig.CreateLogger();
             Serilog.ILogger logger = Log.Logger.ForContext<Program>();
 
-            Console.Write(" "); // ǿ<EFBFBD><EFBFBD>֢<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ſ<EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>־<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>벻<EFBFBD>þ<EFBFBD>
+            Console.Write(" "); // 补全日志第一行开头的空白
 
             var builder = WebApplication.CreateBuilder(args);
 
-            // <EFBFBD><EFBFBD><EFBFBD><EFBFBD> CORS <20><><EFBFBD><EFBFBD>
+            // CORS配置
             builder.Services.AddCors(options =>
             {
                 options.AddPolicy("AllowFrontend",
                     builder =>
                     {
                         builder
-                            .WithOrigins("http://localhost:3000", "http://admin.gitdl.cn", "https://admin.gitdl.cn","http://47.243.56.137:50050") // ǰ<>˵<EFBFBD>ַ
+                            .WithOrigins("http://localhost:3000", "http://admin.gitdl.cn", "https://admin.gitdl.cn","http://47.243.56.137:50050") 
                             .AllowAnyMethod()
                             .AllowAnyHeader()
                             .AllowCredentials();
@@ -55,10 +55,9 @@ namespace iFileProxy
 
             builder.Services.AddSingleton<TaskManager>();
 
-            // <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>֤<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
+            // 添加验证服务
             builder.Services.AddScoped<AuthService>();
 
-            // <20><><EFBFBD><EFBFBD>JWT<57><54>֤
             builder.Services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)
                 .AddJwtBearer(options =>
                 {
@@ -77,9 +76,8 @@ namespace iFileProxy
 
             var app = builder.Build();
 
-            AppConfig.CheckAppConfig(app.Services);
+            // 全局错误处理中间件
-
+            app.UseMiddleware<ErrorHandlerMiddleware>();
-            LocalCacheManager localCacheManager = new(app.Services);
 
             app.UseSerilogRequestLogging(options =>
             {
@@ -98,17 +96,21 @@ namespace iFileProxy
                 app.UseSwaggerUI();
             }
 
-            // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>м<EFBFBD><D0BC>
+            // 检查自定义配置
-            app.UseMiddleware<ErrorHandlerMiddleware>();
+            AppConfig.CheckAppConfig(app.Services);
+
+            // 初始化缓存管理器
+            LocalCacheManager localCacheManager = new(app.Services);
+
 
             app.UseCors("AllowFrontend");
 
             app.UseHttpsRedirection();
 
-            // <20><><EFBFBD><EFBFBD>Ĭ<EFBFBD><C4AC><EFBFBD>ļ<EFBFBD>ѡ<EFBFBD><D1A1>
+
             var defaultFilesOptions = new DefaultFilesOptions();
-            defaultFilesOptions.DefaultFileNames.Clear(); // <20><><EFBFBD>Ĭ<EFBFBD><C4AC><EFBFBD>б<EFBFBD>
+            defaultFilesOptions.DefaultFileNames.Clear(); 
-            defaultFilesOptions.DefaultFileNames.Add("index.html"); // <20><><EFBFBD><EFBFBD><EFBFBD>Զ<EFBFBD><D4B6><EFBFBD>Ĭ<EFBFBD><C4AC><EFBFBD>ļ<EFBFBD>
+            defaultFilesOptions.DefaultFileNames.Add("index.html"); 
 
             app.UseDefaultFiles(defaultFilesOptions);
 
@@ -120,7 +122,7 @@ namespace iFileProxy
                 app.Services.GetRequiredService<Dictionary<string, Dictionary<string, uint>>>(),
                 AppConfig.GetCurrConfig().SecurityOptions.DailyRequestLimitPerIP);
 
-            // <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>м<EFBFBD><EFBFBD>
+            // JWT中间件
             app.UseMiddleware<JwtMiddleware>();
 
             app.MapControllers();

src/Services/DatabaseGateService.cs

@@ -115,11 +115,22 @@ namespace iFileProxy.Services
             if (db_user == null || db_password == null || db_host == null || db_port == null)
                 throw new NoNullAllowedException("数据库配置获取失败,不允许为空的字段出现空值");
 
-            string db_connstr = $"server={db_host};user={db_user};database={Db.DatabaseName};port={db_port};password={db_password};Pooling=true;MaximumPoolSize=500;";
+            var builder = new MySqlConnectionStringBuilder
-            MySqlConnection conn;
+            {
+                Server = db_host,
+                UserID = db_user,
+                Database = Db.DatabaseName,
+                Port = (uint)db_port,
+                Password = db_password,
+                Pooling = true,
+                MinimumPoolSize = 1,
+                MaximumPoolSize = 50,
+                ConnectionLifeTime = 300  // 连接最大生命周期(秒)
+            };
+
             try
             {
-                conn = new MySqlConnection(db_connstr);
+                var conn = new MySqlConnection(builder.ConnectionString);
                 conn.Open();
                 return conn;
             }
@@ -900,5 +911,61 @@ namespace iFileProxy.Services
             var users = await ExecuteQueryAsync<User>(sql, parameters);
             return users.FirstOrDefault();
         }
+
+        /// <summary>
+        /// 获取数据库连接池状态
+        /// </summary>
+        /// <returns>连接池信息</returns>
+        public async Task<ConnectionPoolInfo> GetConnectionPoolInfoAsync()
+        {
+            try
+            {
+                var appName = "iFileProxy";  // 程序名称
+                var parameters = new Dictionary<string, object>
+                {
+                    { "@appName", $"%{appName}%" }
+                };
+
+                // 获取总连接数
+                var totalSql = @"SELECT COUNT(*) 
+                                FROM information_schema.processlist 
+                                WHERE info LIKE @appName OR host LIKE @appName";
+                var totalConnections = await ExecuteScalarAsync<long>(totalSql, parameters);
+
+                // 获取活跃连接数
+                var activeSql = @"SELECT COUNT(*) 
+                                 FROM information_schema.processlist 
+                                 WHERE Command != 'Sleep' 
+                                 AND (info LIKE @appName OR host LIKE @appName)";
+                var activeConnections = await ExecuteScalarAsync<long>(activeSql, parameters);
+
+                // 获取睡眠连接数
+                var sleepingSql = @"SELECT COUNT(*) 
+                                   FROM information_schema.processlist 
+                                   WHERE Command = 'Sleep' 
+                                   AND (info LIKE @appName OR host LIKE @appName)";
+                var sleepingConnections = await ExecuteScalarAsync<long>(sleepingSql, parameters);
+
+                // 获取连接详情
+                var detailSql = @"SELECT id, user, host, db, command, time, state, info 
+                                 FROM information_schema.processlist 
+                                 WHERE info LIKE @appName OR host LIKE @appName";
+                var connections = await ExecuteQueryAsync<ProcessListInfo>(detailSql, parameters);
+
+                return new ConnectionPoolInfo
+                {
+                    TotalConnections = totalConnections,
+                    ActiveConnections = activeConnections,
+                    SleepingConnections = sleepingConnections,
+                    MaxPoolSize = 50,  // 从配置中获取的最大连接数
+                    Connections = connections
+                };
+            }
+            catch (Exception ex)
+            {
+                _logger.Error($"获取连接池信息失败: {ex.Message}");
+                throw;
+            }
+        }
     }
 }

src/Services/LocalCacheManager.cs

@@ -39,7 +39,7 @@ namespace iFileProxy.Services
         public void CheckAndCleanCache(object state)
         {
             // 初始化并打开一个MySQL连接 防止后续数据过多导致程序crush
-            var dbConn = _dbGateService.GetAndOpenDBConn(DbConfigName.iFileProxy);
+            using var dbConn = _dbGateService.GetAndOpenDBConn(DbConfigName.iFileProxy);
 
             // 获取数据库中超出生命周期的缓存数据
             string result = _dbGateService.QueryTableData($"SELECT * FROM t_tasks_info WHERE  UNIX_TIMESTAMP(NOW()) - UNIX_TIMESTAMP(update_time) > {CACHE_LIFETIME} AND (tag <> 'CLEANED' OR tag IS NULL)", DbConfigName.iFileProxy);
@@ -67,6 +67,8 @@ namespace iFileProxy.Services
                     _dbGateService.UpdateTaskStatus(taskInfo,dbConn);
                 }
             }
+
+
         }
 
         /// <summary>