public async Task <string> ConnectAsync(string hostname, int port)
{
Timeout = 5000;
Hostname = hostname;
Port = port;
if (App.Mock)
{
await Task.Delay(1);
Connected = true;
return("Forcing mock connection");
}
using (await BusyObject.LockAsync())
{
IsBusy = true;
using (var client = new TelnetClient(hostname, port, Timeout))
{
if (await client.Connect())
{
var suppressDebug = false;
await client.WriteLineAsync(":*IDN?", suppressDebug);
var s = await client.ReadStringAsync(suppressDebug);
Connected = true;
return(s);
}
Connected = false;
IsBusy = false;
return(string.Empty);
}
}
}
public async Task <string> SendCommandAsync(string command, bool getResponse)
{
if (App.Mock)
{
await Task.Delay(1);
if (getResponse)
{
throw new Exception($"Cannot determine command response when mocking (command: '{command}'");
}
else
{
return("");
}
}
using (await BusyObject.LockAsync())
{
IsBusy = true;
using (var client = new TelnetClient(Hostname, Port, Timeout))
{
if (!await client.Connect())
{
return(null);
}
var suppressDebug = command == ":TRIG:STAT?";
await client.WriteLineAsync(command, suppressDebug);
IsBusy = false;
if (getResponse)
{
return(await client.ReadStringAsync(suppressDebug));
}
else
{
if (AutoGetScreenshotAfterCommand && !IsQuery(command))
{
Task.Run(async() =>
{
await Task.Delay(100);
await GetScreenshot();
}).NoAwait();
}
return("");
}
}
}
}
public async Task <byte[]> GetScreenshot()
{
if (App.Mock)
{
await Task.Delay(1);
string resourceID = string.Format("Skippy.Resources.mock.png");
System.Reflection.Assembly assembly = System.Reflection.Assembly.GetExecutingAssembly();
System.IO.Stream stream = assembly.GetManifestResourceStream(resourceID);
using (var memoryStream = new System.IO.MemoryStream())
{
stream.CopyTo(memoryStream);
var bytes = memoryStream.ToArray();
return(bytes);
}
}
// skip if busy
//if (IsBusy)
//{
// return null;
//}
using (await BusyObject.LockAsync())
using (var client = new TelnetClient(Hostname, Port, Timeout))
{
IsBusy = true;
client.DebugEnabled = false;
if (!await client.Connect())
{
return(null);
}
var suppressDebug = true;
await client.WriteLineAsync(":DISP:DATA? ON,OFF,PNG", suppressDebug);
// read header start character '#'
var char1 = await client.ReadCharAsync();
if (char1 == '#')
{
// read header length
var char2 = await client.ReadCharAsync();
if (int.TryParse(char2.ToString(), out var headerLength))
{
// read length of data
var dataLengthString = await client.ReadStringAsync(headerLength);
if (int.TryParse(dataLengthString, out var dataLength))
{
var data = await client.ReadBytesAsync(dataLength);
//Debug.WriteLine("Got Screenshot");
IsBusy = false;
return(data);
}
else
{
Debug.WriteLine("Screenshot response data length not recognized");
}
}
else
{
Debug.WriteLine("Screenshot response missing header length");
}
}
else
{
Debug.WriteLine("Screenshot response missing header character");
}
client.DebugEnabled = true;
IsBusy = false;
return(null);
}
}
