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iMES.Core/Middleware/HttpRequestMiddleware.cs

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+using Microsoft.AspNetCore.Http;
+using System;
+using System.IO;
+using System.Collections.Generic;
+using System.Text;
+
+namespace iMES.Core.Middleware
+{
+    public class HttpRequestMiddleware
+    {
+        public static Func<RequestDelegate, RequestDelegate> Context
+        {
+            get
+            {
+                return next => async context =>
+                {
+                    //动态标识刷新token(2021.05.01)
+                    context.Response.Headers.Add("Access-Control-Expose-Headers", "vol_exp");
+                    var stream = context.Request.Body;
+                    if (stream == Stream.Null || stream.CanSeek)
+                    {
+                        await next(context);
+
+                        return;
+                    }
+                    try
+                    {
+                        using (var buffer = new MemoryStream())
+                        {
+                            // Copy the request stream to the memory stream.
+                            await stream.CopyToAsync(buffer);
+
+                            // Rewind the memory stream.
+                            buffer.Position = 0L;
+
+                            // Replace the request stream by the memory stream.
+                            context.Request.Body = buffer;
+
+                            // Invoke the rest of the pipeline.
+                            await next(context);
+                        }
+                    }
+
+                    finally
+                    {
+                        // Restore the original stream.
+                        context.Request.Body = stream;
+                    }
+
+                };
+
+            }
+        }
+    }
+   
+}