def download_excel(request):

    """

    get excel file from url param and upload it to html page for downloading

    :param request:

    :return:

    """

    # get file path from a tag url param

    excel_file = request.GET.get("EXCEL")

    file_byte = open(excel_file, "rb")

    response = HttpResponse(file_byte)

    # 设置头信息，告诉浏览器这是个文件

    response['Content-Type'] = 'application/octet-stream'

    response['Content-Disposition'] = 'attachment;filename="attendance.xlsx"'

    return response

def download_get_part():

    """

    把上面下载post返回的excel文件路径，传入进来，用二进制打开，返给浏览器

    :return:

    """

    # todo: 待调试，flask的HttpResponse替代品是啥，

    excel_file = request.args.get("excel")

    # 设置头信息，告诉浏览器这是个文件

    file_byte = open(excel_file, "rb")

    response = Response(file_byte)

    response.headers["Content-Type"] = "application/octet-stream"

    response.headers["Content-Disposition"] = "attachment;filename={}".format(

        "各节点之间的调用关系.xlsx".encode().decode('latin-1')

    )

    return response

    # 这里是另一种方式提供下载文件接口，只有这一行就够了

    # return send_file(excel_file)  # website download file successful