Download File

[sayazaaa]

How do I download a file from the server？
I tried:

val dowCommand =  SingleCommand(
            "ftinitdownload", ProtocolRole.CLIENT)
        dowCommand.add( CommandSingleParameter("clientftfid", "0"))
        dowCommand.add( CommandSingleParameter("name", "/icon_${channelInfo.iconId}"))
        dowCommand.add( CommandSingleParameter("cid", "${channel.id}"))
        dowCommand.add( CommandSingleParameter("cpw", ""))
        dowCommand.add( CommandSingleParameter("seekpos", "0"))
        dowCommand.add( CommandSingleParameter("proto", "0"))
        val initDownload = client.executeCommand(
            dowCommand
        ).get().toList()

but it returns nothing
What should I do？