public static async Task StreamAsync(this IEventStreamer eventStreamer, String topic, HttpContext httpContext, Func <Task <StatusCodeResult> > preflightFunction)
{
var preflightResponse = await preflightFunction();
if (preflightResponse == null)
{
httpContext.Response.StatusCode = preflightResponse.StatusCode;
return;
}
await eventStreamer.StreamAsync(topic, httpContext);
}
public static async Task StreamAsync(this IEventStreamer eventStreamer, String topic, HttpContext httpContext)
{
var buffer = new ArraySegment <Byte>(new Byte[4096]);
var webSocket = await httpContext.WebSockets.AcceptWebSocketAsync();
await eventStreamer.StreamAsync(topic, httpContext.RequestAborted, async message =>
{
await webSocket.SendTextAsync(message);
var receiveResult = await webSocket.ReceiveAsync(buffer, httpContext.RequestAborted);
if (receiveResult.CloseStatus.HasValue)
{
httpContext.Abort();
}
});
}