public IObservable <Dictionary <string, object> > Connect(
IObservable <string> input,
ICollection <IMessageUnpacker> unpackers)
{
return(Observable.Defer(() => Observable.Create <Dictionary <string, object> >(async(sink, token) =>
{
SocketIoClient socket = new SocketIoClient();
Uri connectionUri = null;
try
{
connectionUri = new Uri("https://streamer.cryptocompare.com");
await socket.ConnectAsync(connectionUri);
_logger.LogInformation("[EXTERNAL-SERVICE] Connecting to CryptoCompare.com ...");
}
catch (UriFormatException e)
{
sink.OnError(e);
return;
}
Func <Task> closeSocket = async() => {
await socket.DisconnectAsync();
_logger.LogInformation("[EXTERNAL-SERVICE] Connection to CryptoCompare.com closed");
};
socket.Connected += (sender, args) =>
{
input.Subscribe(v =>
{
string[] subscription = { v };
Dictionary <string, object> subs = new Dictionary <string, object>();
subs.Add("subs", subscription);
socket.Emit("SubAdd", subs);
},
onError: e => sink.OnError(e));
};
socket.On("m", async args =>
{
string message = args;
string messageType = message.Substring(0, message.IndexOf("~"));
foreach (IMessageUnpacker unpacker in unpackers)
{
if (unpacker.Supports(messageType))
{
try
{
sink.OnNext(unpacker.Unpack(message));
}
catch (Exception e)
{
sink.OnError(e);
await closeSocket.Invoke();
}
break;
}
}
});
socket.ErrorReceived += (sender, args) => sink.OnError(new Exception(args.Value));
socket.Disconnected += (sender, args) => sink.OnCompleted();
token.Register(async() => await closeSocket());
await socket.ConnectAsync(connectionUri);
})));
}
