RequestCancellation.cs

#r "nuget: Microsoft.AspNetCore.App, 2.2.8"

using System.Net.Http;
using Microsoft.AspNetCore.Builder;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;

var builder = WebApplication.CreateBuilder(args);

var app = builder.Build();
var log = app.Services.GetRequiredService<ILogger<WebApplication>>();

app.MapGet("/",
    async (CancellationToken cancel) =>
    {
        try
        {
            await Task.Delay(TimeSpan.FromSeconds(60), cancel);
            log.LogCritical("NOT CANCELLED!");
        }
        catch (OperationCanceledException)
        {
            log.LogError("Cancelled");
        }
    });

const string uri = "http://localhost:17825";
var http = new HttpClient();
new Thread(() =>
{
    try
    {
        using var cancel = new CancellationTokenSource(TimeSpan.FromSeconds(1));
        using var _ = http.GetAsync(uri, cancel.Token).Result;
    }
    catch { }
})
{
    IsBackground = true,
}.Start();


app.Run(uri);