(Go) 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 Go Downloads Go Package for Windows, MacOS, Linux, Alpine Linux, Solaris

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

    ftp := chilkat.NewFtp2()

    ftp.SetHostname("ftp.example.com")
    ftp.SetUsername("login")
    ftp.SetPassword("password")

    ftp.SetKeepSessionLog(true)

    // Connect and login to the FTP server.
    success := ftp.Connect()
    if success != true {
        fmt.Println(ftp.LastErrorText())
        ftp.DisposeFtp2()
        return
    }

    // Set the current remote directory to the root of
    // the remote tree to be compared.
    success = ftp.ChangeRemoteDir("abc123")
    if success != true {
        fmt.Println(ftp.LastErrorText())
        ftp.DisposeFtp2()
        return
    }

    // 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.
    mode := 1
    descendTree := true
    previewOnly := true
    success = ftp.SyncRemoteTree2("/temp/abc123",mode,descendTree,previewOnly)
    if success != true {
        fmt.Println(ftp.LastErrorText())
        ftp.DisposeFtp2()
        return
    }

    // 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:
    sa := chilkat.NewStringArray()
    sa.LoadFromText(ftp.SyncPreview())

    fac := chilkat.NewFileAccess()

    numFiles := sa.Count()
    i := 0
    var localFilePath *string = new(string)
    for (i < numFiles) {
        localFilePath = sa.GetString(i)
        fmt.Println(*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 {
            fmt.Println("Failed to delete: ", *localFilePath)
        }

        i = i + 1
    }

    success = ftp.Disconnect()

    ftp.DisposeFtp2()
    sa.DisposeStringArray()
    fac.DisposeFileAccess()