Clear the FTP Directory Listing Cache

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Demonstrates the Chilkat Ftp2.ClearDirCache method, which clears the cached listing for the current remote directory. It takes no arguments; the next indexed-listing call fetches a fresh listing from the server.

Background: The index-based directory API caches the listing the first time you read it, so repeated accessor calls avoid extra round trips. The trade-off is staleness: if the directory changes — files added or removed, whether by your own operations or another process — the cache still reflects the old state. ClearDirCache discards it so the next GetDirCount queries the server again.

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    success := false

    //  Demonstrates the Ftp2.ClearDirCache method, which clears the cached listing for the current
    //  remote directory.  It takes no arguments and is a void method.

    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
    }

    //  The first GetDirCount caches the listing.
    n := ftp.GetDirCount()
    fmt.Println("Entries: ", n)

    //  ... the remote directory changes (files added or removed by another process) ...

    //  Discard the cache so the next listing call fetches fresh data from the server.
    ftp.ClearDirCache()

    n = ftp.GetDirCount()
    fmt.Println("Entries after refresh: ", n)

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


    ftp.DisposeFtp2()