WebApplication.New().ServerFeatures is null

[NGloreous]

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

When using minimal APIs in ASP.NET Core 6, after creating a new application from the existing app, the ServerFeatures property of the new application is null.

Per @Tratcher, this is because the ServerFeatures are never put in the property bag of the application:

aspnetcore/src/DefaultBuilder/src/WebApplication.cs

Lines 70 to 71 in d1c349f

	internal IFeatureCollection ServerFeatures => _host.Services.GetRequiredService<IServer>().Features;
	IFeatureCollection IApplicationBuilder.ServerFeatures => ServerFeatures;

.

Expected Behavior

ServerFeatures shouldn't be null.

Steps To Reproduce

var builder = WebApplication.CreateBuilder(args);
var app = builder.Build();
var newApp = (app as IApplicationBuilder).New();
Debug.Assert(newApp.ServerFeatures != null);

Exceptions (if any)

No response

.NET Version

6.0.100

Anything else?

No response

[Tratcher]

@halter73

[skyflyer]

We've encountered this same issue when trying to conditionally use HTTPS redirection middleware like:

app.UseWhen(
    (ctx) => !ctx.Request.Path.StartsWithSegments("/health"),
    (appBuilder) => {
        appBuilder.UseHsts();
        appBuilder.UseHttpsRedirection();
    }
);

The workaround for us is to simply use appBuilder.UseMiddleware<HttpsRedirectionMiddleware>(); instead.

[campersau]

A general workaround is:

((IApplicationBuilder)app).Properties["server.Features"] = ((IApplicationBuilder)app).ServerFeatures;