} // OnFeedbackRichTextBoxTextChanged
/// <summary>
/// Responds to a returning from a WriteAsync pipe operation by giving
/// feedback to User and waiting server's feedback.
/// </summary>
/// <param name="sender"> The async pipe task </param>
/// <param name="operation"> Specifies the command string </param>
/// <param name="form"> The form object </param>
private void OnReturningFromAsyncPipeOperation(object sender, string operation, MainForm form)
{
try
{
Task task = sender as Task;
WriteVerbose($"Feedback UI to {{{operation}}} ... ", true);
// Some milliseconds to complete and we are good
Task.Delay(1000);
// Give feedback for async task operation
GiveFeedbackToUiInput(task, operation, true, form);
WriteVerbose("OK", false, "White", form);
// Wait for server's feedback
int size = 1024;
var buffer = new byte[size];
string data = System.String.Empty;
if (null == Pipe)
{
return;
}
WriteVerbose
(
"Waiting for response from server ... ", true,
"White", form
);
// Check connection
if (!Pipe.IsConnected)
{
try
{
Pipe.Connect(1000);
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine
(
"OnReturningFromAsyncPipeOperation#Connect: " + ex.Message
);
}
}
if (Pipe.IsConnected)
{
// Clean buffer
for (int i = 0; i < buffer.Count(); i++)
{
buffer[i] = Encoding.GetBytes("0")[0];
}
// Read data, if any
// Data format: status#command#category#source#execution_date
try
{
// Some milliseconds for the server to respond and we are good
Task.Delay(ServerResponseTimeout);
var T = Pipe.ReadAsync
(
buffer, 0, 1, PipeReadCancellationToken
);
if (T.IsCompleted)
{
int N = T.Result;
if (N > 0)
{
data += Encoding.GetString(buffer);
}
}
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine
(
"OnReturningFromAsyncPipeOperation#ReadAsync: " +
ex.Message
);
}
// Write feedback to user
if (!System.String.IsNullOrEmpty(data))
{
WriteVerbose("OK");
string message =
InterpreteFeedbackFromPipeServerStream(data);
// Fire feedback event
GiveFeedbackToUiInput(task, message, false, form);
data = System.String.Empty;
}
else
{
WriteVerbose("No Response");
}
}
else
{
WriteVerbose("Disconnected");
}
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine
(
"OnReturningFromAsyncPipeOperation: " + ex.Message
);
}
} // OnReturningFromAsyncPipeOperation
