Monitor FTP Transfer Progress

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Demonstrates the progress properties CurBytesReceived, CurBytesReceivedStr, CurBytesSent, CurBytesSentStr, ProgressMonSize, PercentDoneScale, and AutoGetSizeForProgress.

Note: The local paths are relative to the application's current working directory. Absolute paths may also be used. Supply the paths appropriate to your own environment.

Background: Percentage progress needs a known total, but FTP does not always report a file's size up front — so AutoGetSizeForProgress issues a SIZE command before a download, and ProgressMonSize supplies an expected size when even that is unavailable (a one-shot value consumed by the next transfer). PercentDoneScale sets the resolution of progress callbacks. The current byte counts are exposed both as 32-bit integers and as strings, the string forms avoiding integer-width limits for very large transfers.

Chilkat Go Downloads

Download Chilkat for Go

    success := false

    ftp := chilkat.NewFtp2()

    ftp.SetHostname("ftp.example.com")
    ftp.SetUsername("myFtpLogin")

    //  Normally you would not hard-code the password in source.  You should instead obtain it
    //  from an interactive prompt, environment variable, or a secrets vault.
    ftp.SetPassword("myPassword")

    success = ftp.Connect()
    if success == false {
        fmt.Println(ftp.LastErrorText())
        ftp.DisposeFtp2()
        return
    }

    //  AutoGetSizeForProgress sends a SIZE command before a download so percentage-based progress can
    //  be computed.
    ftp.SetAutoGetSizeForProgress(true)

    //  PercentDoneScale sets the value representing one hundred percent in PercentDone callbacks.
    //  1000 gives tenth-of-a-percent resolution.
    ftp.SetPercentDoneScale(1000)

    //  ProgressMonSize is a one-shot expected size for the next download when the size is not
    //  otherwise known.  It is consumed by the next download and reset to 0.
    ftp.SetProgressMonSize(20485760)

    success = ftp.GetFile("public_html/bigfile.zip","qa_output/bigfile.zip")
    if success == false {
        fmt.Println(ftp.LastErrorText())
        ftp.DisposeFtp2()
        return
    }

    //  After a transfer, the current byte counts are available as 32-bit numbers or as strings (the
    //  string forms avoid integer-size limits).
    fmt.Println("Bytes received: ", ftp.CurBytesReceived())
    fmt.Println("Bytes received (str): ", ftp.CurBytesReceivedStr())
    fmt.Println("Bytes sent: ", ftp.CurBytesSent())
    fmt.Println("Bytes sent (str): ", ftp.CurBytesSentStr())

    success = ftp.Disconnect()
    if success == false {
        fmt.Println(ftp.LastErrorText())
        ftp.DisposeFtp2()
        return
    }


    ftp.DisposeFtp2()