public async Task <bool> GetWsStatusAsync(int nodeId)
{
var nodeUrl = this.db.Nodes
.Where(x => x.Id == nodeId)
.Select(x => $"ws://{x.Url}:10334")
.FirstOrDefault();
var websocket = new System.Net.WebSockets.ClientWebSocket();
var success = false;
try
{
await websocket.ConnectAsync(new System.Uri(nodeUrl), CancellationToken.None);
success = websocket.State == System.Net.WebSockets.WebSocketState.Open;
await websocket.CloseAsync(System.Net.WebSockets.WebSocketCloseStatus.NormalClosure, null, CancellationToken.None);
}
catch (Exception e)
{
Log.Error("WS connection CloseAsync() ", e);
}
finally
{
websocket.Dispose();
}
return(success);
}
private async Task ReadMessagesAsync()
{
try
{
var sb = new StringBuilder();
while (true)
{
var buffer = new ArraySegment <byte>(new byte[4096]);
var r = await this.client.ReceiveAsync(buffer, CancellationToken.None);
if (r.MessageType != System.Net.WebSockets.WebSocketMessageType.Text)
{
break;
}
sb.Append(System.Text.Encoding.UTF8.GetString(buffer.Array, 0, r.Count));
if (r.EndOfMessage)
{
var text = sb.ToString();
onMessageReceived?.Invoke(text);
sb.Clear();
}
}
} catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine(ex);
// disconnect...
client.Dispose();
client = null;
}
}
private static async System.Threading.Tasks.Task Prototype201802084_1()
{
// todo We need exception handling here.
{
double dateTimeFrequencyToPhaseFrequencyRatio =
(double)System.TimeSpan.TicksPerSecond / (double)System.Diagnostics.Stopwatch.Frequency;
long basePhase = System.Diagnostics.Stopwatch.GetTimestamp();
long baseUtcDateTimeInTicks = System.DateTime.UtcNow.Ticks;
basePhase = System.Diagnostics.Stopwatch.GetTimestamp();
baseUtcDateTimeInTicks = System.DateTime.UtcNow.Ticks;
var clientWebSocket = new System.Net.WebSockets.ClientWebSocket();
//System.Threading.Tasks.Task task =
await
clientWebSocket.ConnectAsync
(new System.Uri
//(@"wss://ws-feed-public.sandbox.gdax.com"),
(@"wss://ws-feed.gdax.com"),
System.Threading.CancellationToken.None
);
// todo ??? The caller really should do this if needed.
// todo ??? But any method really should do this
// todo ??? if after {await} it's not supposed to return to the synchronization context.
//// todo Comment in other places where we don't call this.
//.ConfigureAwait(false);
//int timeSpanInMilliSeconds = System.Environment.TickCount;
// todo Remember to call this even if the task already completed -- to rethrow any exceptions.
// todo {task.Result} also waits, right?
//task.Wait();
//task.RunSynchronously();
//timeSpanInMilliSeconds = System.Environment.TickCount - timeSpanInMilliSeconds;
//>>>clientWebSocket.ReceiveAsync
if (clientWebSocket.State == System.Net.WebSockets.WebSocketState.Open)
{
// todo Prototype subscribe/unsubscribe for 1 instrument at a time.
const string channelName =
//@"heartbeat";
//@"ticker";
@"level2";
//@"user";
//@"matches";
//@"full";
const string requestString =
//Newtonsoft.Json.JsonConvert.SerializeObject
// ( new
// {
// type = "subscribe",
// product_ids = new string[] { @"ETH-USD", @"ETH-EUR", },
// }
// );
"{" +
"\"type\":\"subscribe\"," +
"\"channels\":[{\"name\":\"" + channelName + "\",\"product_ids\":[\"BTC-USD\",\"BTC-EUR\"]}]" +
"}";
byte[] requestBytes = System.Text.Encoding.ASCII.GetBytes(requestString);
await clientWebSocket.SendAsync
(new System.ArraySegment <byte>(requestBytes),
// todo ??? Binary didn't work, right?
System.Net.WebSockets.WebSocketMessageType.Text,
//System.Net.WebSockets.WebSocketMessageType.Binary,
true,
System.Threading.CancellationToken.None
);
// todo This really doesn't need to be more than 16K, right?
var receiveBuffer = new System.ArraySegment <byte>(new byte[33 * 1024]);
for (bool isMessageBegin = true; ;)
{
if (clientWebSocket.State != System.Net.WebSockets.WebSocketState.Open)
{
System.Console.WriteLine(@"201802085");
break;
}
else
{
}
System.Net.WebSockets.WebSocketReceiveResult webSocketReceiveResult =
await clientWebSocket.ReceiveAsync(receiveBuffer, System.Threading.CancellationToken.None);
// todo ???
if (webSocketReceiveResult.Count <= 0)
{
System.Console.WriteLine(@"201802086");
break;
}
else
{
}
if (isMessageBegin)
{
isMessageBegin = false;
System.Console.WriteLine(',');
//System.Console.WriteLine();
long currentUtcDateTimeInTicks =
(long)((double)(ulong)(System.Diagnostics.Stopwatch.GetTimestamp() - basePhase) * dateTimeFrequencyToPhaseFrequencyRatio + 0.5) +
baseUtcDateTimeInTicks;
System.Console.Write
((new System.DateTime(currentUtcDateTimeInTicks)).ToString(@"o", System.Globalization.DateTimeFormatInfo.InvariantInfo));
}
else
{
}
string string1 =
System.Text.Encoding.ASCII.GetString(receiveBuffer.Array, 0, webSocketReceiveResult.Count);
System.Console.Write(string1);
if (webSocketReceiveResult.MessageType == System.Net.WebSockets.WebSocketMessageType.Close)
{
System.Console.WriteLine(@"201802087");
break;
}
else
{
}
if (webSocketReceiveResult.EndOfMessage)
{
isMessageBegin = true;
//break;
}
else
{
}
}
}
else
{
System.Console.WriteLine(@"201802088");
}
// todo ??? WebSocketState >= CloseSent
clientWebSocket.Dispose();
}
StaticBool1_ = true;
}
public override void Dispose()
{
client?.Dispose();
}
private static async System.Threading.Tasks.Task Prototype201803072_1()
{
// todo We need exception handling here.
{
double dateTimeFrequencyToPhaseFrequencyRatio =
(double)System.TimeSpan.TicksPerSecond / (double)System.Diagnostics.Stopwatch.Frequency;
long basePhase = System.Diagnostics.Stopwatch.GetTimestamp();
long baseUtcDateTimeInTicks = System.DateTime.UtcNow.Ticks;
basePhase = System.Diagnostics.Stopwatch.GetTimestamp();
baseUtcDateTimeInTicks = System.DateTime.UtcNow.Ticks;
var clientWebSocket = new System.Net.WebSockets.ClientWebSocket();
await
clientWebSocket.ConnectAsync
(new System.Uri
(@"wss://testnet.bitmex.com/realtime"),
//(@"wss://bitmex.com/realtime"),
System.Threading.CancellationToken.None
);
// todo ??? The caller really should do this if needed.
// todo ??? But any method really should do this
// todo ??? if after {await} it's not supposed to return to the synchronization context.
//// todo Comment in other places where we don't call this.
//.ConfigureAwait(false);
if (clientWebSocket.State == System.Net.WebSockets.WebSocketState.Open)
{
{
const string message = @"GET/realtime";
string nonceAsString = (++Nonce_).ToString();
// todo Use ASCII encoding everywhere.
byte[] signatureBytes =
hmacsha256
(System.Text.Encoding.UTF8.GetBytes(ApiKeySecret_),
System.Text.Encoding.UTF8.GetBytes(message + nonceAsString)
);
string signatureString = ByteArrayToString(signatureBytes);
/*const*/ string requestString =
"{" +
"\"op\":\"authKey\"," +
"\"args\":[\"" + ApiKeyId_ + "\"," + nonceAsString + ",\"" + signatureString + "\"]" +
"}";
byte[] requestBytes = System.Text.Encoding.ASCII.GetBytes(requestString);
await clientWebSocket.SendAsync
(new System.ArraySegment <byte>(requestBytes),
System.Net.WebSockets.WebSocketMessageType.Text,
true,
System.Threading.CancellationToken.None
);
}
if (clientWebSocket.State == System.Net.WebSockets.WebSocketState.Open)
{
{
const string subscriptionTopicName =
//@"quote:XBTUSD";
//@"trade:XBTUSD";
//@"orderBookL2:XBTUSD";
//@"instrument:XBTUSD";
//@"instrument";
//@"liquidation";
//@"quoteBin1m:XBTUSD";
@"order";
const string requestString =
"{" +
"\"op\":\"subscribe\"," +
"\"args\":[\"" + subscriptionTopicName + "\"]" +
"}";
byte[] requestBytes = System.Text.Encoding.ASCII.GetBytes(requestString);
await clientWebSocket.SendAsync
(new System.ArraySegment <byte>(requestBytes),
// todo ??? For GDAX binary didn't work, right?
System.Net.WebSockets.WebSocketMessageType.Text,
//System.Net.WebSockets.WebSocketMessageType.Binary,
true,
System.Threading.CancellationToken.None
);
}
// todo For GDAX this really doesn't need to be more than 16K, right?
var receiveBuffer = new System.ArraySegment <byte>(new byte[33 * 1024]);
for (bool isMessageBegin = true; ;)
{
if (clientWebSocket.State != System.Net.WebSockets.WebSocketState.Open)
{
System.Console.WriteLine(@"201802085");
break;
}
else
{
}
System.Net.WebSockets.WebSocketReceiveResult webSocketReceiveResult =
await clientWebSocket.ReceiveAsync(receiveBuffer, System.Threading.CancellationToken.None);
// todo Is this correct?
// todo Are these conditions equivalent?
if (webSocketReceiveResult.CloseStatus.HasValue || webSocketReceiveResult.Count <= 0)
{
System.Console.WriteLine(@"201802086");
break;
}
else
{
}
if (isMessageBegin)
{
isMessageBegin = false;
System.Console.WriteLine(',');
//System.Console.WriteLine();
long currentUtcDateTimeInTicks =
(long)((double)(ulong)(System.Diagnostics.Stopwatch.GetTimestamp() - basePhase) * dateTimeFrequencyToPhaseFrequencyRatio + 0.5) +
baseUtcDateTimeInTicks;
System.Console.Write
((new System.DateTime(currentUtcDateTimeInTicks)).ToString(@"o", System.Globalization.DateTimeFormatInfo.InvariantInfo));
}
else
{
}
// todo Preserve decoding state between decoding chunks.
string string1 =
System.Text.Encoding.ASCII.GetString(receiveBuffer.Array, 0, webSocketReceiveResult.Count);
System.Console.Write(string1);
if (webSocketReceiveResult.MessageType == System.Net.WebSockets.WebSocketMessageType.Close)
{
System.Console.WriteLine(@"201802087");
break;
}
else
{
}
if (webSocketReceiveResult.EndOfMessage)
{
isMessageBegin = true;
//break;
}
else
{
}
}
}
else
{
System.Console.WriteLine(@"201802088");
}
}
else
{
System.Console.WriteLine(@"201804021");
}
// todo ??? WebSocketState >= CloseSent
clientWebSocket.Dispose();
}
StaticBool1_ = true;
}
