gistfile1.txt

JavaScript for copy is:
media/js/transfer/component_form.js (line 46)

Server-side code is:
main/filesystem.py (line 105)

Code that does actual copying:
                if os.path.isdir(entry_path):
                    destination_dir = os.path.join(transfer_dir, entry)
                    try:
                        shutil.copytree(
                            entry_path,
                            destination_dir
                        )
                    except:
                        error = 'Error copying from ' + entry_path + ' to ' + destination_dir + '.'
                else:
                    shutil.copy(entry_path, transfer_dir)