void handleFile()

in clients/winuploader/Microbit.Uploader/MainForm.cs [101:176]
59 lines of code
18 McCabe index (conditional complexity)

        void handleFile(string fullPath)
        {
            try
            {
                // In case this is data-url download, at least Chrome will not rename file, but instead write to it
                // directly. This mean we may catch it in the act. Let's leave it some time to finish writing.
                Thread.Sleep(500);

                var info = new System.IO.FileInfo(fullPath);
                Trace.WriteLine("download: " + info.FullName);

                if (info.Extension != ".hex") return;

                var infoName = info.Name;
                Trace.WriteLine("download name: " + info.Name);
                if (!infoName.StartsWith("microbit-", StringComparison.OrdinalIgnoreCase)) return;
                if (info.Name.EndsWith(".uploaded.hex", StringComparison.OrdinalIgnoreCase)) return;
                if (info.Length > 1000000) return; // make sure we don't try to copy large files


                // already copying?
                if (Interlocked.Exchange(ref this.copying, 1) == 1)
                    return;

                try
                {

                    var driveletters = getMicrobitDrives();
                    List<String> drives = new List<String>();
                    foreach (var d in driveletters)
                    {
                        drives.Add(d.RootDirectory.FullName);
                    }
                    if (!String.IsNullOrEmpty(customcopypath) && Directory.Exists(customcopypath))
                    {
                        drives.Add(customcopypath);
                    }
                    if (drives.Count == 0)
                    {
                        this.updateStatus("no board found");
                        this.trayIcon.ShowBalloonTip(3000, "cancelled uploading...", "no board found", ToolTipIcon.None);
                        return;
                    }

                    this.updateStatus("uploading .hex file");
                    this.trayIcon.ShowBalloonTip(3000, "uploading...", "uploading .hex file", ToolTipIcon.None);

                    // copy to all boards
                    copyFirmware(info.FullName, drives);

                    // move away hex file
                    var temp = System.IO.Path.ChangeExtension(info.FullName, ".uploaded.hex");
                    try
                    {
                        File.Copy(info.FullName, temp, true);
                        File.Delete(info.FullName);
                    }
                    catch (IOException) { }
                    catch (NotSupportedException) { }
                    catch (UnauthorizedAccessException) { }
                    catch (ArgumentException) { }

                    // update ui
                    this.updateStatus("uploading done");
                    this.waitingForHexFileStatus();
                }
                finally
                {
                    Interlocked.Exchange(ref this.copying, 0);
                }
            }
            catch (IOException) { }
            catch (NotSupportedException) { }
            catch (UnauthorizedAccessException) { }
            catch (ArgumentException) { }
        }