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Write Text at a String Offset in a Remote SFTP File

Demonstrates the Chilkat SFtp.WriteFileText64s method, which is like WriteFileText64 but takes the byte offset as a decimal string. The arguments are the handle, the offset string, the charset, and the text.

Background: Some programming languages Chilkat targets lack a native 64-bit integer type, or make large integer literals awkward. Passing the offset as a decimal string sidesteps that entirely — the value is parsed by the library — while addressing the same large-file positions as the int64 form.

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Local $bSuccess = False

;  Demonstrates the SFtp.WriteFileText64s method, which is like WriteFileText64 but takes the
;  byte offset as a decimal string.  The 1st argument is the handle, the 2nd is the offset string,
;  the 3rd is the charset, and the 4th is the text.

$oSftp = ObjCreate("Chilkat.SFtp")

;  Connect, authenticate, and initialize the SFTP subsystem.
Local $iPort = 22
$bSuccess = $oSftp.Connect("sftp.example.com",$iPort)
If ($bSuccess = False) Then
    ConsoleWrite($oSftp.LastErrorText & @CRLF)
    Exit
EndIf

;  Normally you would not hard-code the password in source.  You should instead obtain it
;  from an interactive prompt, environment variable, or a secrets vault.
Local $sPassword = "mySshPassword"

$bSuccess = $oSftp.AuthenticatePw("mySshLogin",$sPassword)
If ($bSuccess = False) Then
    ConsoleWrite($oSftp.LastErrorText & @CRLF)
    Exit
EndIf

$bSuccess = $oSftp.InitializeSftp()
If ($bSuccess = False) Then
    ConsoleWrite($oSftp.LastErrorText & @CRLF)
    Exit
EndIf

Local $sHandle = $oSftp.OpenFile("subdir/hugefile.dat","readWrite","openOrCreate")
If ($oSftp.LastMethodSuccess = False) Then
    ConsoleWrite($oSftp.LastErrorText & @CRLF)
    Exit
EndIf

;  Supplying the offset as a string is convenient in languages without a native 64-bit integer.
Local $sOffset = "5000000000"
$bSuccess = $oSftp.WriteFileText64s($sHandle,$sOffset,"utf-8","MARKER")
If ($bSuccess = False) Then
    ConsoleWrite($oSftp.LastErrorText & @CRLF)
    Exit
EndIf

$bSuccess = $oSftp.CloseHandle($sHandle)
If ($bSuccess = False) Then
    ConsoleWrite($oSftp.LastErrorText & @CRLF)
    Exit
EndIf

ConsoleWrite("Wrote at the string offset." & @CRLF)

$oSftp.Disconnect