对 excel 文件的 Flask 响应给我损坏的 excel 响应

问题描述

我创建了端点以使用 xmlswriter 库从数据库中获取数据并下载 excel 文件中的数据。但不是下载 excel 文件，而是下载名称为“unkNown.txt”的文本文件，其中包含以下数据：

"xl/workbook.xml�Q�N�0����4 ���T�%*!�P�#2����ؑ���Y�J)��ɞ ����x�

我已经尝试了下面注释代码中提到的所有示例代码： 代码：

@app.route("/api/v1/downloadexcel",methods=["GET"])
def excel_download2():   
    date_from = request.args.get("date_from")
    date_to = request.args.get("date_to")

    try:
        data_to_create_excel= get_data(date_from,date_to)
      
        output = io.BytesIO()
        workbook = xlsxwriter.Workbook(output,{'in_memory': True})

        # workbook = xlsxwriter.Workbook('demo.xlsx')

        worksheet = workbook.add_worksheet('data_to_create_excel')
        headers = list(data_to_create_excel[0].keys()) if len(data_to_create_excel) else []
        rows = [data .values() for data in data_to_create_excel]
        for row_num,row_data in enumerate([headers,*rows]):
            for col_num,col_data in enumerate(row_data):
                worksheet.write(row_num,col_num,col_data)


        workbook.close()
        output.seek(0)
        return send_file(output,attachment_filename="output.xlsx",as_attachment=True)

        # return Response(output.getvalue(),mimetype="application/ms-excel",#                 headers={"Content-disposition": "attachment;filename=employee_report.xlsx"})

        # self.send_response(200)
        # self.send_header("Access-Control-Expose-Headers","Content-disposition")
        # self.send_header('Content-disposition','attachment; filename=test.xlsx')
        # self.send_header('Content-type',#                  'application/ms-excel')
        # self.end_headers()
        # self.wfile.write(output.read())
        # return

        # file_name = 'ore_data_{}.xlsx'.format(
        #     datetime.Now().strftime('%d/%m/%Y'))
        # return jsonify([csv_headers]),200
        # return send_file(output,#                  attachment_filename='your_filename.xlsx',#                  as_attachment=True)
        # return Response(
        #     output.getvalue(),#     # mimetype='application/ms-excel',#     headers={
        #         "Access-Control-Expose-Headers": "Content-disposition",#         "Content-disposition": 'attachment; filename=test.xlsx',#         'Content-type':
        #     'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet'
        #     },# )
        # return output.read(),200
    except Exception as e:
        print(e)

解决方法

将您的数据添加到 Pandas 数据框中。处理列等要容易得多。然后使用 to_excel 函数。然后使用 send_from_directory（正如您所做的那样）发送文件。