使用Django接口返回csv文件到页面

def getIHGU_data_csv(request):
    startTime=time.time()
    json_str={}

    #获取参数
    if request.method == "GET":
        filePath='/data/IHGUData/souceData/'
        dirs = os.listdir(filePath)
        for dir in dirs:
            fileName=filePath+dir
        response = HttpResponse(content_type='text/csv')
        response['Content-Disposition'] = 'attachment; filename=%s' % (dir)
        writer = csv.writer(response)
        writer.writerow(['id', 'reportTime','snNum','PONshou','PONjie','upMaxFlow','upAvgFlow','downMaxFlow','downAvgFlow'])
        for line in open(fileName):
            datalist=line.replace('\n', '').split(",")
            writer.writerow(datalist)
        os.system("mv %s /data/IHGUData/historyData/" % (filePath+dir));
    return response