python can upload and download files

I just learned python recently. When I meet the need of uploading and downloading files, record it!

django web project, front-end upload control using uploadify.

File upload - The Python code of background view is as follows:

@csrf_exempt
@require_http_methods(["POST"])
def uploadFiles(request):
 try:
  user = request.session.get('user')
  allFimeNames = ""
  # Get all uploaded files 
  files = request.FILES.getlist("file")
  for file in files:
   #  Get file name   Parse file suffix   Get the new file name 
   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)
   # Write to server 
   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)
   # Return the new file name   Multiple are separated by commas 
   allFimeNames = os.path.join(filePath,filename)
 except Exception:
  return JsonResponse(data={'error': " A system exception "}, status=400)
 return JsonResponse(data={'filePath': allFimeNames})

request.FILES.getlist ("file") file here is the name of the file submission for the front page and can be configured in uploadify.

File Download:

@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(" File does not exist! ")
 response['Content-Type'] = 'application/octet-stream'
 response['Content-Disposition'] = 'attachment;filename="{0}"'.format("")
 return response