HTTP Listener - creates a netcat-like listener on a local port. Returns 201 to all requests

HttpListener.cs

void Main() {
	var cts = new CancellationTokenSource();

	var task = StartListener(cts.Token);

	do {
		Thread.Sleep(1);
	} while (true);

	cts.Cancel();

	task.Wait();
}

async Task StartListener(CancellationToken token) {
	// netsh http add urlacl url=http://+:8080/ user=us\af59986
	// if that doesn't work, run as Admin or https://stackoverflow.com/a/45177071
	// var url = "http://localhost:8080/";
	// var url = "http://30.239.173.11:8080/";
	var url = "http://*:80/";
	var listener = new HttpListener();
	listener.Prefixes.Add(url);
	try {
		listener.Start();
	} catch (Exception ex) {
		Console.WriteLine($"failed to listen on {url}: {ex}");
	}
	$"Listening on {url}".Dump();

	token.Register(() => listener.Abort());

	while (!token.IsCancellationRequested) {
		HttpListenerContext context;

		try {
			context = await listener.GetContextAsync().ConfigureAwait(false);

			await HandleRequest(context); // Note that this is *not* awaited
		} catch {
			// Handle errors
		}
	}
}

async Task HandleRequest(HttpListenerContext context) {
	// Handle the request, ideally in an asynchronous way.
	// Even if not asynchronous, though, this is still run 
	// on a different (thread pool) thread
	string content = "";
	if (context.Request.HasEntityBody) {
		using (System.IO.Stream body = context.Request.InputStream) {
			using (System.IO.StreamReader reader = new StreamReader(body, context.Request.ContentEncoding)) {
				content = await reader.ReadToEndAsync();
			}
		}
	}
	new {
		UrlCalled = context.Request.Url,
		Method = context.Request.HttpMethod,
		Body = content,
	}.Dump();
	context.Response.StatusCode = 201;
	context.Response.Close();
}