RequestAborted cancellation tokens not triggered for Kestrel

[Praburaj]

Example:

public class Startup
{
        static int count = 0;
        public void Configure(IApplicationBuilder app)
        {
            app.Run(async context =>
            {
                int requestId = count++;
                Console.WriteLine("Received request {0}", requestId);
                context.RequestAborted.Register(() =>
                {
                    Console.WriteLine("Cancellation token fired for request Id : {0}", requestId);
                });

                await context.Response.WriteAsync("Hello world" + requestId.ToString());
                await System.Threading.Tasks.Task.Delay(10 * 1000);
                await context.Response.WriteAsync("Finished writing" + requestId.ToString());
            });
        }
}

Host this application using Kestrel and make a request from IE or Chrome. Hit escape to notice that cancellation tokens are not triggered.

[muratg]

@halter73

[halter73]

@muratg Do we want this for beta7?

[muratg]

@halter73 can you check with @lodejard?

[muratg]

@halter73 @lodejard @DamianEdwards needed in RC1?

[DamianEdwards]

@muratg no, can be punted to post-RC

[halter73]

Fixed by #325

Likely to be improved by #408