Improve

framework/src/Volo.Abp.AspNetCore.Mvc/Volo/Abp/AspNetCore/Mvc/ContentFormatters/RemoteStreamContentOutputFormatter.cs

@@ -27,10 +27,10 @@ public class RemoteStreamContentOutputFormatter : OutputFormatter
             context.HttpContext.Response.ContentType = remoteStream.ContentType;
             context.HttpContext.Response.ContentLength = remoteStream.ContentLength;
 
-            if (!remoteStream.FileName.IsNullOrWhiteSpace())
+            if (!remoteStream.FileName.IsNullOrWhiteSpace() && !context.HttpContext.Response.Headers.ContainsKey(HeaderNames.ContentDisposition))
             {
                 var contentDisposition = new ContentDispositionHeaderValue("attachment");
-                contentDisposition.SetHttpFileName(remoteStream.FileName);
+                contentDisposition.SetMimeFileName(remoteStream.FileName);
                 context.HttpContext.Response.Headers[HeaderNames.ContentDisposition] = contentDisposition.ToString();
             }
 

framework/src/Volo.Abp.Http.Client/Volo/Abp/Http/Client/ClientProxying/ClientProxyBase.cs

@@ -2,7 +2,6 @@
 using System.Collections.Generic;
 using System.Globalization;
 using System.Linq;
-using System.Net;
 using System.Net.Http;
 using System.Net.Http.Headers;
 using System.Threading;
@@ -92,9 +91,8 @@ public class ClientProxyBase<TService> : ITransientDependency
              * it before we finish doing our work with the stream */
             return (T)(object)new RemoteStreamContent(
                 await responseContent.ReadAsStreamAsync(),
-                WebUtility.UrlDecode(
                 responseContent.Headers?.ContentDisposition?.FileNameStar ??
-                RemoveQuotes(responseContent.Headers?.ContentDisposition?.FileName).ToString()),
+                RemoveQuotes(responseContent.Headers?.ContentDisposition?.FileName).ToString(),
                 responseContent.Headers?.ContentType?.ToString(),
                 responseContent.Headers?.ContentLength);
         }