【新增】新增并发限制中间件【Microsoft.AspNetCore.ConcurrencyLimiter】，限制并发处理，请结合限流进行合理配置。

CoreCms.Net.Web.Admin/Program.cs

@@ -84,6 +84,15 @@ builder.Services.AddHttpContextSetup();
 //服务配置中加入AutoFac控制器替换规则。
 builder.Services.Replace(ServiceDescriptor.Transient<IControllerActivator, ServiceBasedControllerActivator>());
 
+//并发限制-使用队列策略模式
+builder.Services.AddQueuePolicy(options =>
+{
+    //最大并发请求数,超过之后,进行排队
+    options.MaxConcurrentRequests = AppSettingsConstVars.MiddlewareConcurrencyLimiterMaxConcurrentRequests;
+    //最大请求数,超过之后,返回503
+    options.RequestQueueLimit = AppSettingsConstVars.MiddlewareConcurrencyLimiterRequestQueueLimit;
+});
+
 //注册mvc，注册razor引擎视图
 builder.Services.AddMvc(options =>
     {
@@ -151,6 +160,7 @@ builder.Host.UseNLog();
 var app = builder.Build();
 
 
+
 #region 解决Ubuntu Nginx 代理不能获取IP问题===================================================================
 app.UseForwardedHeaders(new ForwardedHeadersOptions
 {
@@ -159,7 +169,8 @@ app.UseForwardedHeaders(new ForwardedHeadersOptions
 #endregion
 
 #region 中间件注册===================================================================
-
+// 启用并发限制数中间件
+app.UseConcurrencyLimiter();
 // 开启Ip限流
 app.UseIpLimitMiddle();
 // 记录请求与返回数据 (注意开启权限，不然本地无法写入)
@@ -168,7 +179,6 @@ app.UseRequestResponseLog();
 app.UseRecordAccessLogsMildd(GlobalEnumVars.CoreShopSystemCategory.Admin.ToString());
 // 记录ip请求 (注意开启权限，不然本地无法写入)
 app.UseIpLogMildd();
-
 #endregion
 
 app.UseSwagger().UseSwaggerUI(c =>