Read Text at a String Offset from a Remote SFTP File

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Demonstrates the Chilkat SFtp.ReadFileText64s method, which is like ReadFileText64 but takes the byte offset as a decimal string. The arguments are the handle, the offset string, the maximum number of bytes, and the charset.

Dim success As Long
success = 0

'  Demonstrates the SFtp.ReadFileText64s method, which is like ReadFileText64 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 maximum number of bytes, and the 4th is the charset.

Dim sftp As New ChilkatSFtp

'  Connect, authenticate, and initialize the SFTP subsystem.
Dim port As Long
port = 22
success = sftp.Connect("sftp.example.com",port)
If (success = 0) Then
    Debug.Print sftp.LastErrorText
    Exit Sub
End If

'  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.
Dim password As String
password = "mySshPassword"

success = sftp.AuthenticatePw("mySshLogin",password)
If (success = 0) Then
    Debug.Print sftp.LastErrorText
    Exit Sub
End If

success = sftp.InitializeSftp()
If (success = 0) Then
    Debug.Print sftp.LastErrorText
    Exit Sub
End If

Dim handle As String
handle = sftp.OpenFile("subdir/hugefile.dat","readOnly","openExisting")
If (sftp.LastMethodSuccess = 0) Then
    Debug.Print sftp.LastErrorText
    Exit Sub
End If

'  Supplying the offset as a string is convenient in languages without a native 64-bit integer.
Dim offset As String
offset = "5000000000"
Dim numBytes As Long
numBytes = 6
Dim text As String
text = sftp.ReadFileText64s(handle,offset,numBytes,"utf-8")
If (sftp.LastMethodSuccess = 0) Then
    Debug.Print sftp.LastErrorText
    Exit Sub
End If

Debug.Print text

success = sftp.CloseHandle(handle)
If (success = 0) Then
    Debug.Print sftp.LastErrorText
    Exit Sub
End If

sftp.Disconnect