扩展跨域请求，组件可以注册自己的跨域请求处理策略。

Falcon.SugarApi/FalconCors/CorsOptions.cs

@@ -0,0 +1,29 @@
+namespace Falcon.SugarApi.FalconCors
+{
+    /// <summary>
+    /// 跨域请求cors参数
+    /// </summary>
+    public class CorsOptions
+    {
+        /// <summary>
+        /// 策略名
+        /// </summary>
+        public string? PolicyName { get; set; }
+        /// <summary>
+        /// 允许通过的方法。
+        /// </summary>
+        public string? Methods { get; set; }
+        /// <summary>
+        /// 允许通过的请求头
+        /// </summary>
+        public string? Headers { get; set; }
+        /// <summary>
+        /// 运行通过的源
+        /// </summary>
+        public string? Origins { get; set; }
+        /// <summary>
+        /// 允许携带凭据
+        /// </summary>
+        public bool? AllowCredentials { get; set; }
+    }
+}

Falcon.SugarApi/FalconCors/CorsPolicyWallpaper.cs

@@ -0,0 +1,35 @@
+using Microsoft.AspNetCore.Cors.Infrastructure;
+
+namespace Falcon.SugarApi.FalconCors
+{
+    /// <summary>
+    /// CorsPolicy装饰器
+    /// </summary>
+    public class CorsPolicyWallpaper:CorsPolicy
+    {
+        /// <summary>
+        /// 通过一个CorsOptions构建CorsPolicy
+        /// </summary>
+        /// <param name="options">跨域请求参数</param>
+        public CorsPolicyWallpaper(CorsOptions? options) {
+            if(options == null) {
+                return;
+            }
+            if(options.AllowCredentials != null) {
+                this.SupportsCredentials = options.AllowCredentials.Value;
+            }
+            if(options.Headers.IsNotNullOrEmpty()) {
+                this.Headers.Clear();
+                options.Headers.SplitToStringList().ForEach(a => this.Headers.Add(a));
+            }
+            if(options.Methods.IsNotNullOrEmpty()) {
+                this.Methods.Clear();
+                options.Methods.SplitToStringList().ForEach(a => this.Methods.Add(a));
+            }
+            if(options.Origins.IsNotNullOrEmpty()) {
+                this.Origins.Clear();
+                options.Origins.SplitToStringList().ForEach(a => this.Origins.Add(a));
+            }
+        }
+    }
+}

Falcon.SugarApi/FalconCors/IServiceCollectionExtend.cs

@@ -0,0 +1,75 @@
+using Falcon.SugarApi.ApiClient;
+using Microsoft.AspNetCore.Cors.Infrastructure;
+using Microsoft.Extensions.DependencyInjection;
+using Npgsql.Replication.PgOutput.Messages;
+using System;
+
+namespace Falcon.SugarApi.FalconCors
+{
+    /// <summary>
+    /// 服务集合方法扩展
+    /// </summary>
+    public static class IServiceCollectionExtend
+    {
+        /// <summary>
+        /// 通过cors方式允许所有跨域源通过。Configure中通过app.UseCors("CorsPolicy")运行策略，或在控制器中通过EnableCors应用。
+        /// </summary>
+        /// <param name="services">服务集合</param>
+        /// <param name="policyName">策略名称，默认CorsPolicy</param>
+        /// <returns>服务集合</returns>
+        public static IServiceCollection AllowAny(this IServiceCollection services,string policyName = "CorsPolicy") =>
+            services.AddCors(options => options.AddPolicy(policyName,builder => {
+                builder
+                    .AllowAnyMethod()
+                    //.WithMethods("GET","POST","OPTIONS")
+                    .AllowAnyHeader()
+                    .SetIsOriginAllowed(_ => true) // =AllowAnyOrigin()
+                    .AllowCredentials();
+            }));
+
+        /// <summary>
+        /// 通过cors方式允许所有跨域源通过。Configure中通过app.UseCors("CorsPolicy")运行策略，或在控制器中通过EnableCors应用。
+        /// </summary>
+        /// <param name="services">服务集合</param>
+        /// <param name="policyName">策略名称，默认CorsPolicy</param>
+        /// <param name="policyBuilder">策略创建器</param>
+        /// <returns>服务集合</returns>
+        public static IServiceCollection AddCorsByAllowAny(
+            this IServiceCollection services,
+            string policyName,
+            Action<CorsPolicyBuilder>? policyBuilder = null) {
+
+            if(policyName.IsNullOrEmpty()) {
+                throw new ArgumentNullException(nameof(policyName));
+            }
+            services.AddCors(options => options.AddPolicy(policyName,builder => {
+                builder
+                    .AllowAnyMethod()   //.WithMethods("GET","POST","OPTIONS")
+                    .AllowAnyHeader()
+                    .SetIsOriginAllowed(_ => true) // =AllowAnyOrigin()
+                    .AllowCredentials();
+                policyBuilder?.Invoke(builder);
+            }));
+            return services;
+        }
+
+        /// <summary>
+        /// 添加跨域配置。
+        /// </summary>
+        /// <param name="services">服务集合</param>
+        /// <param name="options">跨域配置选项</param>
+        /// <returns>服务集合</returns>
+        /// <exception cref="ArgumentNullException"></exception>
+        public static IServiceCollection AddCoreWithOptions(this IServiceCollection services,CorsOptions options) {
+            if(options == null) {
+                throw new ArgumentNullException(nameof(options));
+            }
+            if(options.PolicyName.IsNullOrEmpty()) {
+                throw new ArgumentNullException("options.PolicyName");
+            }
+            var policy = new CorsOptions();
+            services.AddCors(op => op.AddPolicy(options.PolicyName,new CorsPolicyWallpaper(options)));
+            return services;
+        }
+    }
+}

Falcon.SugarApi/FalconCors/Readme.md

@@ -0,0 +1,7 @@
+## cors源认证
+
+组件可以通过注册自己的cors源认证方法来实现访问的控制。
+
+插件可以通过IServiceCollection.AddCoreWithOptions方法注册自己跨域请求策略。
+然后在控制器中使用EnableCorsAttribute特性标记特性使用该策略。    
+如果不使用自己的策略，apiservice平台允许所有跨域请求。