Django动态下载文件

objs = Units.objects.all()
# 创建 Workbook 时，如果需要写入中文，请使用 utf-8 编码，默认是 unicode 编码。
wb = xlwt.Workbook(encoding=‘utf-8‘)
ws = wb.add_sheet(‘配件价格‘)
ws.write(0, 0, ‘配件编号‘)
ws.write(0, 1, ‘配件名称‘)
ws.write(0, 2, ‘配件价格‘)
ws.write(0, 3, ‘商场‘)
excel_row = 1
for obj in objs:
    ws.write(excel_row, 0, obj.unitid)
    ws.write(excel_row, 1, obj.unitname)
    ws.write(excel_row, 2, obj.price)
    ws.write(excel_row, 3, obj.marketid)
    excel_row = excel_row + 1
# ------ 开始：这段代码可以用下面注释段替代，都是本应保存为文件格式的改成保存为数据流，以便返回前端下载
response = HttpResponse(content_type=‘application/vnd.ms-excel‘)
response[‘Content-Disposition‘] = ‘attachment; filename=example.xls‘
wb.save(response)
return response
# ------ 结束
"""
sio = StringIO.StringIO()
wb.save(sio)
response = HttpResponse(sio.getvalue(),content_type=‘application/vnd.ms-excel‘) 
response[‘Content-Disposition‘] = ‘attachment; filename=test.xls‘          
return response
"""