public async Task <Sample> GetCurrentPrice()
{
if (!connected)
{
throw new InvalidOperationException("Binance cannot GetCurrentPrice until Initialized!");
}
Sample sample = null;
do
{
string json = null;
try
{
json = await websocket.ReceiveMessage();
}
catch (WebSocketException e)
{
Console.WriteLine($"SOCKET ERROR: {e.Message}");
Console.WriteLine("Attempting reconnect and trying again");
await this.websocket.Connect($"wss://stream.binance.com:9443/ws/{tradingPair.ToLower()}@ticker");
continue;
}
JObject message = JsonConvert.DeserializeObject(json) as JObject;
if (message != null &&
message.ContainsKey("e") &&
message.GetValue("e").ToString() == "24hrTicker" &&
message.ContainsKey("b") &&
decimal.TryParse(message.GetValue("b").ToString(), out decimal price))
{
sample = new Sample()
{
Value = price, DateTime = time.Now
};
}
else
{
Console.WriteLine("Got non-ticker/unparseable message:");
Console.WriteLine(message);
}
} while (sample == null);
return(sample);
}
private async Task RunWebSocket(IDictionary <string, object> websocketContext)
{
object value;
if (websocketContext.TryGetValue(typeof(WebSocketContext).FullName, out value))
{
mWebSocket = new NetWebSocket(((WebSocketContext)value).WebSocket);
}
else
{
mWebSocket = new OwinWebSocket(websocketContext);
}
OnOpen();
await OnOpenAsync();
var buffer = new byte[MaxMessageSize];
Tuple <ArraySegment <byte>, WebSocketMessageType> received = null;
do
{
try
{
received = await mWebSocket.ReceiveMessage(buffer, mCancellToken.Token);
if (received.Item1.Count > 0)
{
await OnMessageReceived(received.Item1, received.Item2);
}
}
catch (TaskCanceledException)
{
break;
}
catch (OperationCanceledException oce)
{
if (!mCancellToken.IsCancellationRequested)
{
OnReceiveError(oce);
}
break;
}
catch (ObjectDisposedException)
{
break;
}
catch (Exception ex)
{
if (IsFatalSocketException(ex))
{
OnReceiveError(ex);
}
break;
}
}while (received.Item2 != WebSocketMessageType.Close);
try
{
await mWebSocket.Close(WebSocketCloseStatus.NormalClosure, string.Empty, mCancellToken.Token);
}
catch
{ //Ignore
}
if (!mCancellToken.IsCancellationRequested)
{
mCancellToken.Cancel();
}
OnClose(mWebSocket.CloseStatus, mWebSocket.CloseStatusDescription);
await OnCloseAsync(mWebSocket.CloseStatus, mWebSocket.CloseStatusDescription);
}
