ExtensionCmd Method
Sends an extension command to the server.
Syntax
sftpclient.extensionCmd(extn, dataBuffer_Buffer, [callback])
Callback
The 'callback' parameter specifies a function which will be called when the operation completes (or an error is encountered). If the 'callback' parameter is not specified, then the method will block and will not return until the operation completes (or an error is encountered).
The callback for this method is defined as:
function(err, buffer){ }
'err' is the error that occurred. If there was no error, then 'err' is 'null'.
'buffer' is the value returned by the method.
'err' has 2 properties which hold detailed information:
err.code err.message
Remarks
Use this method to send an extension command to the SFTP server. Provide the extension type via the Extn parameter, and the request body via the DataBuffer parameter.
Upon completion of the command, the method returns the response as received from the server.