python实现上传下载文件功能

@csrf_exempt@require_http_methods(["POST"])def uploadFiles(request): try:  user = request.session.get('user')  allFimeNames = ""  #获取所有上传文件  files = request.FILES.getlist("file")  for file in files:   # 获取文件名 解析文件后缀 获取新文件名   oldName = file.name   filename = str(int(time.time() * 10))+"."+oldName.split(".")[1]   now = datetime.now()   filePath = os.path.join("developmentTask",str(user.get("userId"))+"-"+now.strftime('%Y-%m-%d'))   dirpath = os.path.join(settings.UPLOADFILES_DIRS , filePath)   #写入服务器   if not os.path.exists(dirpath):    os.makedirs(dirpath)   newFilePath = os.path.join(dirpath, filename)   with open(newFilePath, 'wb+') as destination:    for chunk in file.chunks():     destination.write(chunk)   #返回新文件名 多个用逗号隔开   allFimeNames = os.path.join(filePath,filename) except Exception:  return JsonResponse(data={'error': "系统异常"}, status=400) return JsonResponse(data={'filePath': allFimeNames})

@csrf_exempt@require_http_methods(["GET"])def downloadFile(request): filePath = request.GET.get("filepath") fileName = request.GET.get("filename") file_name = os.path.join(settings.UPLOADFILES_DIRS, filePath) if os.path.exists(file_name):  def file_iterator(file_name, chunk_size=512):   with open(file_name) as f:    while True:     c = f.read(chunk_size)     if c:      yield c     else:      break  response = StreamingHttpResponse(file_iterator(file_name))  response['Content-Type'] = 'application/octet-stream'  response['Content-Disposition'] = 'attachment;filename="{0}"'.format(fileName)  return response response = StreamingHttpResponse("文件不存在！") response['Content-Type'] = 'application/octet-stream' response['Content-Disposition'] = 'attachment;filename="{0}"'.format("") return response