public async Task Invoke(HttpContext context)
{
if (!context.WebSockets.IsWebSocketRequest)
{
// Not a web socket request
await _next.Invoke(context);
return;
}
var ct = context.RequestAborted;
using (var socket = await context.WebSockets.AcceptWebSocketAsync())
{
while (socket.State == WebSocketState.Open)
{
if (_cardReader.IsCardAvailable())
{
await SendStringAsync(socket, BitConverter.ToString(_cardReader.GetCardId()), ct);
}
await Task.Delay(TimeSpan.FromMilliseconds(100));
}
}
}
