(DataFlex) 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

Use ChilkatAx-win32.pkg

Procedure Test
    Handle hoFtp
    Boolean iSuccess
    Integer iMode
    Boolean iDescendTree
    Boolean iPreviewOnly
    Handle hoSa
    Handle hoFac
    Integer iNumFiles
    Integer i
    String sLocalFilePath
    String sTemp1

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

    Get Create (RefClass(cComChilkatFtp2)) To hoFtp
    If (Not(IsComObjectCreated(hoFtp))) Begin
        Send CreateComObject of hoFtp
    End

    Set ComHostname Of hoFtp To "ftp.example.com"
    Set ComUsername Of hoFtp To "login"
    Set ComPassword Of hoFtp To "password"

    Set ComKeepSessionLog Of hoFtp To True

    // Connect and login to the FTP server.
    Get ComConnect Of hoFtp To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoFtp To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // Set the current remote directory to the root of
    // the remote tree to be compared.
    Get ComChangeRemoteDir Of hoFtp "abc123" To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoFtp To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // 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.
    Move 1 To iMode
    Move True To iDescendTree
    Move True To iPreviewOnly
    Get ComSyncRemoteTree2 Of hoFtp "/temp/abc123" iMode iDescendTree iPreviewOnly To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoFtp To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // 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:
    Get Create (RefClass(cComCkStringArray)) To hoSa
    If (Not(IsComObjectCreated(hoSa))) Begin
        Send CreateComObject of hoSa
    End
    Get ComSyncPreview Of hoFtp To sTemp1
    Send ComLoadFromText To hoSa sTemp1

    Get Create (RefClass(cComCkFileAccess)) To hoFac
    If (Not(IsComObjectCreated(hoFac))) Begin
        Send CreateComObject of hoFac
    End

    Get ComCount Of hoSa To iNumFiles
    Move 0 To i

    While (i < iNumFiles)
        Get ComGetString Of hoSa i To sLocalFilePath
        Showln sLocalFilePath

        // 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:
        Get ComFileDelete Of hoFac sLocalFilePath To iSuccess
        If (iSuccess <> True) Begin
            Showln "Failed to delete: " sLocalFilePath
        End

        Move (i + 1) To i
    Loop

    Get ComDisconnect Of hoFtp To iSuccess


End_Procedure