doc(Uploader): add UseUploaderStaticFiles extension method

Author: ArgoZhang

src/BootstrapBlazor.Server/Extensions/WebApplicationExtensions.cs

@@ -0,0 +1,23 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the Apache 2.0 License
+// See the LICENSE file in the project root for more information.
+// Maintainer: Argo Zhang([email protected]) Website: https://www.blazor.zone
+
+using Microsoft.Extensions.FileProviders;
+
+namespace Microsoft.AspNetCore.Builder;
+
+static class WebApplicationExtensions
+{
+    public static void UseUploaderStaticFiles(this WebApplication app)
+    {
+        var uploader = Path.Combine(app.Environment.WebRootPath, "images", "uploader");
+        Directory.CreateDirectory(uploader);
+
+        app.UseStaticFiles(new StaticFileOptions
+        {
+            FileProvider = new PhysicalFileProvider(uploader),
+            RequestPath = "/images/uploader"
+        });
+    }
+}

src/BootstrapBlazor.Server/Program.cs

@@ -35,6 +35,9 @@
     app.UseExceptionHandler("/Error", createScopeForErrors: true);
 }
 
+// 增加上传目录静态资源文件
+app.UseUploaderStaticFiles();
+
 app.UseAntiforgery();
 app.UseBootstrapBlazor();