public async Task HandleError(IConnection Connection, object command, Exception commandErrorException)
{
Connection.IsNotNull($"Invalid parameter received in the {nameof(Handle)} method. {nameof(Connection)}");
command.IsNotNull($"Invalid parameter received in the {nameof(Handle)} method. {nameof(command)}");
commandErrorException.IsNotNull($"Invalid parameter received in the {nameof(Handle)} method. {nameof(commandErrorException)}");
GetServiceCommand getServiceCommand = command as GetServiceCommand;
getServiceCommand.IsNotNull($"Unexpected command received in the {nameof(Handle)} method. {nameof(command)}");
GetServiceCompletion.PayloadData.CompletionCodeEnum errorCode = GetServiceCompletion.PayloadData.CompletionCodeEnum.InternalError;
if (commandErrorException.GetType() == typeof(InvalidDataException))
{
errorCode = GetServiceCompletion.PayloadData.CompletionCodeEnum.InvalidData;
}
GetServiceCompletion.PayloadData payLoad = new GetServiceCompletion.PayloadData(errorCode, commandErrorException.Message);
await Connection.SendMessageAsync(new GetServiceCompletion(getServiceCommand.Headers.RequestId, payLoad));
}
private async void ServiceDiscovery_Click(object sender, EventArgs e)
{
int[] PortRanges = new int[]
{
80, // Only for HTTP
443, // Only for HTTPS
5846,
5847,
5848,
5849,
5850,
5851,
5852,
5853,
5854,
5855,
5856
};
string commandString = string.Empty;
string responseString = string.Empty;
string cardServiceURI = string.Empty;
textBoxCommand.Text = commandString;
textBoxResponse.Text = responseString;
textBoxCardReader.Text = cardServiceURI;
textBoxEvent.Text = string.Empty;
ServicePort = null;
foreach (int port in PortRanges)
{
try
{
WebSocketState state;
using (var socket = new ClientWebSocket())
{
var cancels = new CancellationTokenSource();
cancels.CancelAfter(400);
await socket.ConnectAsync(new Uri($"{textBoxServiceURI.Text}:{port}/xfs4iot/v1.0"), cancels.Token);
state = socket.State;
}
if (state == WebSocketState.Open)
{
ServicePort = port;
var Discovery = new XFS4IoTClient.ClientConnection(new Uri($"{textBoxServiceURI.Text}:{ServicePort}/xfs4iot/v1.0"));
try
{
await Discovery.ConnectAsync();
}
catch (Exception)
{
continue;
}
var getServiceCommand = new GetServiceCommand(Guid.NewGuid().ToString(), new GetServiceCommand.PayloadData(CommandTimeout));
commandString = getServiceCommand.Serialise();
await Discovery.SendCommandAsync(getServiceCommand);
object cmdResponse = await Discovery.ReceiveMessageAsync();
if (cmdResponse is GetServiceCompletion response)
{
responseString = response.Serialise();
var service =
(from ep in response.Payload.Services
where ep.ServiceUri.Contains("CardReader")
select ep
).FirstOrDefault()
?.ServiceUri;
if (!string.IsNullOrEmpty(service))
{
cardServiceURI = service;
}
}
break;
}
}
catch (WebSocketException)
{ }
catch (System.Net.HttpListenerException)
{ }
catch (TaskCanceledException)
{ }
}
if (ServicePort is null)
{
textBoxPort.Text = "";
MessageBox.Show("Failed on finding services.");
}
else
{
textBoxPort.Text = ServicePort.ToString();
}
textBoxCommand.Text = commandString;
textBoxResponse.Text = responseString;
textBoxCardReader.Text = cardServiceURI;
}
