(Visual FoxPro) Delete Local Files that Do Not Exist on the FTP Server

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

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

LOCAL loFtp
LOCAL lnSuccess
LOCAL lnMode
LOCAL lnDescendTree
LOCAL lnPreviewOnly
LOCAL loSa
LOCAL loFac
LOCAL lnNumFiles
LOCAL i
LOCAL lcLocalFilePath

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

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Ftp2')
loFtp = CreateObject('Chilkat.Ftp2')

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

loFtp.KeepSessionLog = 1

* Connect and login to the FTP server.
lnSuccess = loFtp.Connect()
IF (lnSuccess <> 1) THEN
    ? loFtp.LastErrorText
    RELEASE loFtp
    CANCEL
ENDIF

* Set the current remote directory to the root of
* the remote tree to be compared.
lnSuccess = loFtp.ChangeRemoteDir("abc123")
IF (lnSuccess <> 1) THEN
    ? loFtp.LastErrorText
    RELEASE loFtp
    CANCEL
ENDIF

* 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 1.
lnMode = 1
lnDescendTree = 1
lnPreviewOnly = 1
lnSuccess = loFtp.SyncRemoteTree2("/temp/abc123",lnMode,lnDescendTree,lnPreviewOnly)
IF (lnSuccess <> 1) THEN
    ? loFtp.LastErrorText
    RELEASE loFtp
    CANCEL
ENDIF

* 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:
* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.StringArray')
loSa = CreateObject('Chilkat.StringArray')
loSa.LoadFromText(loFtp.SyncPreview)

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.FileAccess')
loFac = CreateObject('Chilkat.FileAccess')

lnNumFiles = loSa.Count
i = 0

DO WHILE (i < lnNumFiles)
    lcLocalFilePath = loSa.GetString(i)
    ? lcLocalFilePath

    * 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:
    lnSuccess = loFac.FileDelete(lcLocalFilePath)
    IF (lnSuccess <> 1) THEN
        ? "Failed to delete: " + lcLocalFilePath
    ENDIF

    i = i + 1
ENDDO

lnSuccess = loFtp.Disconnect()

RELEASE loFtp
RELEASE loSa
RELEASE loFac