public async Task ExecuteResultAsync(ActionContext context)
{
if (context is null)
{
throw new ArgumentNullException(nameof(context));
}
var cancellationToken = context.HttpContext.RequestAborted;
_httpContext = context.HttpContext;
_httpContext.Response.ContentType = "text/plain";
_httpContext.Response.Headers["Connection"] = "close";
await _httpContext.Response.Body.FlushAsync(cancellationToken).ConfigureAwait(false);
_dispatcher.Attach(this);
try
{
var utf8Bytes = JsonSerializer.SerializeToUtf8Bytes(new Message
{
MessageType = MessageType.Heartbeat
});
while (!cancellationToken.IsCancellationRequested)
{
await Task.Delay(TimeSpan.FromSeconds(35), cancellationToken).ConfigureAwait(false);
await SendAsync(utf8Bytes, cancellationToken).ConfigureAwait(false);
}
}
catch (TaskCanceledException)
{
// This is fine.
}
finally
{
_dispatcher.Detach(this);
}
}