B4X

Delete Local Files that Do Not Exist on the FTP Server

See more FTP Examples

Demonstrates how to get a list of local files in a directory tree that do not exist on the FTP server. B4X

Dim success As Boolean = False

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

Dim ftp As ChilkatFtp2
ftp.Initialize("ftp")

ftp.Hostname = "ftp.example.com"
ftp.Username = "login"
ftp.Password = "password"

ftp.KeepSessionLog = True

'  Connect and login to the FTP server.
success = ftp.Connect
If success <> True Then
    Log(ftp.LastErrorText)
    Return
End If


'  Set the current remote directory to the root of
'  the remote tree to be compared.
success = ftp.ChangeRemoteDir("abc123")
If success <> True Then
    Log(ftp.LastErrorText)
    Return
End If


'  Recursively descend the local directory tree
'  and find the files that exist locally but not remotely.
'  These are the files what would be uploaded via
'  the SyncRemoteTree method call with mode = 1.
'  (Mode 1 would upload all files that do not exist on the FTP server.)

'  The actual uploading is avoided by setting the preview-only argument to True.
Dim mode As Int = 1
Dim descendTree As Boolean = True
Dim previewOnly As Boolean = True
success = ftp.SyncRemoteTree2("/temp/abc123", mode, descendTree, previewOnly)
If success <> True Then
    Log(ftp.LastErrorText)
    Return
End If


'  The files what would've been uploaded are now available in the SyncPreview property,
'  which contains a list of local file paths, one per line.
'  A program can iterate over them like this:
Dim sa As ChilkatStringArray
sa.Initialize
sa.LoadFromText(ftp.SyncPreview)

Dim fac As ChilkatFileAccess
fac.Initialize

Dim numFiles As Int = sa.Count
Dim i As Int = 0
Dim localFilePath As String
Do While (i < numFiles)
    localFilePath = sa.GetString(i)
    Log(localFilePath)

    '  An application can delete the file using Chilkat's file access object,
    '  or it can choose to use the native file API available in the programming language:
    success = fac.FileDelete(localFilePath)
    If success <> True Then
        Log("Failed to delete: " & localFilePath)
    End If


    i = i + 1
Loop

success = ftp.Disconnect