更新

CorsServer/CorsServer.WebApi31/Controllers/CorsController.cs

@@ -0,0 +1,48 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+using Microsoft.AspNetCore.Cors;
+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Mvc;
+
+namespace CorsServer.WebApi31.Controllers
+{
+    [Route("api/[controller]/[action]")]
+    [ApiController]
+    public class CorsController : ControllerBase
+    {
+        public CorsController()
+        { 
+        
+        }
+
+        [HttpGet]
+        [HttpOptions]
+        public IActionResult Ping()
+        {
+            var data = new { Code=0, Messge="全局跨域策略"};
+
+            return Ok(data);
+        }
+        [HttpGet]
+        [HttpOptions]
+        [EnableCors(Startup.CorsName)]
+        public IActionResult HasCors()
+        {
+            var data = new { Code = 0, Messge = "单独明确可以跨域" };
+
+            return Ok(data);
+        }
+
+        [HttpGet]
+        [HttpOptions]
+        public IActionResult NoCors()
+        {
+            var data = new { Code = 0, Messge = "不允许跨域" };
+
+            return Ok(data);
+        }
+    }
+}