[Blazor] Provide access to HttpConnectionDispatcherOptions in AddInteractiveServerRenderMode

src/Components/Server/src/Builder/ServerComponentsEndpointOptions.cs

@@ -2,6 +2,7 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 
 using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Http.Connections;
 
 namespace Microsoft.AspNetCore.Components.Server;
 
@@ -53,4 +54,13 @@ public class ServerComponentsEndpointOptions
     /// defined in <see cref="ContentSecurityFrameAncestorsPolicy"/> will be applied.
     /// </remarks>
     public Func<HttpContext, WebSocketAcceptContext, Task>? ConfigureWebSocketAcceptContext { get; set; }
+
+    /// <summary>
+    /// Gets or sets a callback to configure the <see cref="HttpConnectionDispatcherOptions"/> used by the SignalR connection.
+    /// </summary>
+    /// <remarks>
+    /// This allows configuring options such as <see cref="HttpConnectionDispatcherOptions.CloseOnAuthenticationExpiration"/>,
+    /// transport options, authorization data, and other connection-level settings.
+    /// </remarks>
+    public Action<HttpConnectionDispatcherOptions>? ConfigureConnection { get; set; }
 }

src/Components/Server/src/DependencyInjection/ServerRazorComponentsBuilderExtensions.cs

@@ -69,7 +69,10 @@ public override IEnumerable<RouteEndpointBuilder> GetEndpointBuilders(
             }
 
             var endpointRouteBuilder = new EndpointRouteBuilder(Services, applicationBuilder);
-            var hub = endpointRouteBuilder.MapBlazorHub("/_blazor");
+            var serverRenderMode = (InternalServerRenderMode)renderMode;
+            var hub = serverRenderMode.Options?.ConfigureConnection is not null
+                ? endpointRouteBuilder.MapBlazorHub("/_blazor", serverRenderMode.Options.ConfigureConnection)
+                : endpointRouteBuilder.MapBlazorHub("/_blazor");
 
             if (renderMode is InternalServerRenderMode { Options.ConfigureWebSocketAcceptContext: var configureConnection, Options.DisableWebSocketCompression: var disableCompression } &&
                 (configureConnection is not null || !disableCompression))

src/Components/Server/src/PublicAPI.Unshipped.txt

@@ -1 +1,3 @@
 #nullable enable
+Microsoft.AspNetCore.Components.Server.ServerComponentsEndpointOptions.ConfigureConnection.get -> System.Action<Microsoft.AspNetCore.Http.Connections.HttpConnectionDispatcherOptions!>?
+Microsoft.AspNetCore.Components.Server.ServerComponentsEndpointOptions.ConfigureConnection.set -> void