/// <summary>
/// Begins to execute the specified command asynchronously.
/// </summary>
/// <param name="text">The command text.</param>
/// <returns>The SSH command.</returns>
protected SshCommand BeginCommand(string text)
{
lock (this.sync)
{
// If the client is not connected, throw an exception.
if (this.state != ClientState.Connected)
{
throw new SshException("Cannot execute the command on the SSH server because the client is not connected.");
}
// If the current client is null, do nothing.
if (null == this.client)
{
throw new SshException("Cannot execute the command on the SSH server because the previous connection has already been released.");
};
// If the current client is not connected, disconnect the client.
if (!this.client.IsConnected)
{
// Change the state.
this.state = ClientState.Disconnected;
// Show a disconnected message.
this.ShowMessage(
Resources.ServerBusy_32, "Connection Failed", "The connection to the SSH server \'{0}\' failed unexpectedly.".FormatWith(this.client.ConnectionInfo.Host),
false, (int)ApplicationConfig.MessageCloseDelay.TotalMilliseconds,
(object[] parameters) =>
{
// Call the disconnecting event handler.
this.OnDisconnecting(this.client.ConnectionInfo);
// Call the disconnected event handler.
this.OnDisconnected(this.client.ConnectionInfo);
});
// Dispose the clinet.
this.client.Dispose();
this.client = null;
// Throw an exception.
throw new SshException("Cannot execute the command on the SSH server because the connection failed.");
}
// Create a new command for the current text.
SshCommand command = this.client.CreateCommand(text);
// Call the event handler.
this.OnCommandBeginInternal(command);
// Add a new command info object to the commands set.
this.commands.Add(command);
// Beginn execute the command asynchronously.
IAsyncResult asyncResult = command.BeginExecute(this.OnEndCommand, command);
// Get the command data.
ThreadPool.QueueUserWorkItem((object state) =>
{
// Set the stream as blocking.
command.OutputStream.BlockLastReadBuffer = true;
// Read the command data.
using (PipeReader reader = new PipeReader(command.OutputStream))
{
// While the command is not completed.
while (!asyncResult.IsCompleted)
{
// Read all current data in a string.
string data = reader.ReadToEnd();
// If the string null or empty, continue.
if (string.IsNullOrEmpty(data))
{
continue;
}
// Call the event handler event handler.
this.OnCommandDataInternal(command, data);
}
}
});
// Return the command.
return command;
}
}
