用戶上傳一個文件，通過后臺處理后再返回給用戶，并根據(jù)結(jié)果更新當(dāng)前頁面，這要怎么實現(xiàn)？django有辦法同時完成這兩個嗎？還是要借助前端完成？def table(request):    if request.method == 'POST':         form = ExcelSubmit(request.POST, request.FILES)        if form.is_valid():             excel = form.cleaned_data['excel']             filename = os.path.splitext(excel.name)[0]            path = os.getcwd() + '/data/' + filename             table_generation(excel, path)             file_zip(path)             response = FileResponse(open(path + '.zip', 'rb'))             response['Content-Type'] = 'application/octet-stream'             response['Content-Disposition'] = 'attachment;filename=' + filename + '.zip'             return response    else:         form = ExcelSubmit()    return render(request, 'index.html', {'form': form, 'what': '表單提交'})