Get a Remote FTP File's Size by Name

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Demonstrates the Chilkat Ftp2.GetSizeByName method, which returns the size in bytes of a named file in the current remote directory as a 32-bit integer. The only argument is the filename — a name, not a path. It returns -1 when the file is not found or the size cannot be obtained.

Background: This is the direct way to get one file's size when you already know its name, typically via a SIZE command — no full directory listing required. Because the result is 32-bit, it cannot represent files past about 2 GB; use GetSizeStrByName for large files. The argument must be a bare filename in the current directory, so ChangeRemoteDir to the right place first.

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    success := false

    //  Demonstrates the Ftp2.GetSizeByName method, which returns the size in bytes of a named file in
    //  the current remote directory as a 32-bit integer.  The only argument is the filename (a name,
    //  not a path).

    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
    }

    success = ftp.ChangeRemoteDir("public_html")
    if success == false {
        fmt.Println(ftp.LastErrorText())
        ftp.DisposeFtp2()
        return
    }

    //  Returns -1 when the file is not found or the size cannot be obtained.  For files that may
    //  exceed 2 GB, use GetSizeStrByName (returns a decimal string).
    fileSize := ftp.GetSizeByName("report.pdf")
    if fileSize < 0 {
        fmt.Println("File not found, or size unavailable.")
        ftp.DisposeFtp2()
        return
    }

    fmt.Println("report.pdf is ", fileSize, " bytes")

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


    ftp.DisposeFtp2()