VBScript

Get a Remote File's Last-Modified Time

Demonstrates the Chilkat SFtp.GetFileLastModifiedStr method, which returns a remote file's last-modified date and time. The arguments are the remote path (or handle), whether symbolic links are followed, and whether the first argument is a handle.

Background: The last-modified time is the workhorse timestamp — it updates whenever a file's contents change and is what incremental-sync logic compares to decide whether a file needs re-transferring. It is the most reliably supported of the three across servers and filesystems, which is why timestamp-based sync keys off it.

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Dim fso, outFile
Set fso = CreateObject("Scripting.FileSystemObject")
'Create a Unicode (utf-16) output text file.
Set outFile = fso.CreateTextFile("output.txt", True, True)

success = 0

'  Demonstrates the SFtp.GetFileLastModifiedStr method, which returns a remote file's last-modified
'  date and time.  The 1st argument is the remote path (or handle), the 2nd selects whether
'  symbolic links are followed, and the 3rd indicates whether the 1st argument is a handle.

set sftp = CreateObject("Chilkat.SFtp")

'  Connect, authenticate, and initialize the SFTP subsystem.
port = 22
success = sftp.Connect("sftp.example.com",port)
If (success = 0) Then
    outFile.WriteLine(sftp.LastErrorText)
    WScript.Quit
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.
password = "mySshPassword"

success = sftp.AuthenticatePw("mySshLogin",password)
If (success = 0) Then
    outFile.WriteLine(sftp.LastErrorText)
    WScript.Quit
End If

success = sftp.InitializeSftp()
If (success = 0) Then
    outFile.WriteLine(sftp.LastErrorText)
    WScript.Quit
End If

'  The 2nd argument (bFollowLinks) selects whether a symbolic link is followed to its target.
'  The 3rd argument (bIsHandle) is 0 here because the 1st argument is a path, not an
'  open handle.
bFollowLinks = 1
bIsHandle = 0

lastModified = sftp.GetFileLastModifiedStr("subdir/report.pdf",bFollowLinks,bIsHandle)
If (sftp.LastMethodSuccess = 0) Then
    outFile.WriteLine(sftp.LastErrorText)
    WScript.Quit
End If

outFile.WriteLine("Last modified: " & lastModified)

sftp.Disconnect 

outFile.Close