MissionPlanner.Utilities.Firmware.getUrl C# (CSharp) Method

        public string getUrl(string hash, string filename)
        {
            if (hash.ToLower().StartsWith("http"))
            {
                if (filename == "")
                    return hash;

                var url = new Uri(hash);
                return new Uri(url, filename).AbsoluteUri;
            }

            foreach (string x in gholdurls)
            {
                if (x == hash)
                {
                    if (filename == "")
                        return gholdurl.Replace("!Hash!", hash);
                    string fn = Path.GetFileName(filename);
                    filename = gholdfirmwareurl.Replace("!Hash!", hash);
                    filename = filename.Replace("!Firmware!", fn);
                    return filename;
                }
            }
            return "";
        }