VB.NET

SFTP Synchronize Directory Tree - Download

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Demonstrates how to download files to synchronize a local directory tree with a remote directory tree. The SyncTreeDownload method recursively descends the remote directory tree and downloads files based on existence, last-mod date/time and/or size differences. VB.NET

Dim success As Boolean = False

' This example requires the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.

Dim sftp As New Chilkat.SFtp

success = sftp.Connect("my-ssh-server.com",22)
If (success = True) Then
    success = sftp.AuthenticatePw("mySshLogin","mySshPassword")
End If

If (success = True) Then
    success = sftp.InitializeSftp()
End If

If (success <> True) Then
    Debug.WriteLine(sftp.LastErrorText)
    Exit Sub
End If


' Synchronize the remote directory tree rooted at "syncDownloadTest/xml"
' with the local directory tree rooted at "qa_output"
' Both directories are relative paths.  The remote directory
' is relative to the HOME directory of the SSH user account.
' The local directory is relative to the current working directory of the process.
' It is also possible to use absolute paths.

Dim remoteDir As String = "syncDownloadTest/xml"
Dim localDir As String = "qa_output"

' Possible modes that can be passed to the SyncTreeDownload method are:
' mode=0: Download all files
' mode=1: Download all files that do not exist on the local filesystem.
' mode=2: Download newer or non-existant files.
' mode=3: Download only newer files. If a file does not already exist on the local filesystem, it is not downloaded from the server.
' mode=5: Download only missing files or files with size differences.
' mode=6: Same as mode 5, but also download newer files.
' mode=99: Do not download files, but instead delete remote files that do not exist locally.

' This example will use mode 6 to download missing, newer, or files with size differences.
Dim mode As Integer = 6
' This example will turn on recursion to synchronize the entire tree. 
' Recursion can be turned off to synchronize the files of a single directory.
Dim recursive As Boolean = True
success = sftp.SyncTreeDownload(remoteDir,localDir,mode,recursive)
If (success <> True) Then
    Debug.WriteLine(sftp.LastErrorText)
    Exit Sub
End If


Debug.WriteLine("Success.")