WebApplication.RunAsync does not accept a cancellation token

The documentation says: “Runs an application and returns a Task that only completes when the token is triggered or shutdown is triggered”, But the token is not in the method parameters.

The underlying HostingAbstractionsHostExtensions.RunAsync accepts a token, so it is not a problem to pass it, it was probably just forgotten.

[alex-ht-work]

this is an interesting idea

I would not call it an “idea”. It is more like a 2-lines quick non-breaking bugfix. Look:

Instead of

https://github.com/dotnet/aspnetcore/blob/e13e3facfb26643fe580be56f2d3f466cd5ee009/src/DefaultBuilder/src/WebApplication.cs#L145-L149

We put

    public Task RunAsync(string? url = null,  CancellationToken token = default)
    {
        Listen(url);
        return HostingAbstractionsHostExtensions.RunAsync(this, token);
    }

I really don’t think it has to wait until .NET 8… Or am I oversimplifying?

Also, about a workaround: I used Microsoft.Extensions.Hosting.HostingAbstractionsHostExtensions.RunAsync, which is an extension method on IHost, and it works on WebApplication because WebApplication implements IHost. Sadly, I can not pass the URL to listen on this way, but there are other ways to set it.

[msftbot[bot]]

Thanks for contacting us.

We’re moving this issue to the .NET 8 Planning milestone for future evaluation / consideration. We would like to keep this around to collect more feedback, which can help us with prioritizing this work. We will re-evaluate this issue, during our next planning meeting(s). If we later determine, that the issue has no community involvement, or it’s very rare and low-impact issue, we will close it - so that the team can focus on more important and high impact issues. To learn more about what to expect next and how this issue will be handled you can read more about our triage process here.