func checkPrefix(data: String)->String{
        if data.hasPrefix("GET:"){
            return "GET"
        }else if data.hasPrefix("WARNING:"){
            return "WARNING"
        }else if data.hasPrefix("ERROR:"){
            return "ERROR"
        }else if data.hasPrefix("DIFF:"){
            return "DIFF"
        }else if data.hasPrefix("GETFILE:"){
            return "GETFILE"
        }
        return "UNK"
    }