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python实现上传下载文件功能

yipeiwu_com6年前 (2020-03-06)Python基础

最近刚学python,遇到上传下载文件功能需求，记录下！

django web项目，前端上传控件用的是uploadify。

文件上传 - 后台view 的 Python代码如下：

@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})

request.FILES.getlist("file")此处的file 是前端页面的文件提交的名称，可以在uploadify中配置。

文件下载：

@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

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持【听图阁-专注于Python设计】。