python 上传下载文件
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：
1 @csrf_exempt 2 @require_http_methods(["POST"]) 3 def uploadFiles(request): 4 try: 5 user = request.session.get('user') 6 allFimeNames = "" 7 #获取所有上传文件 8 files = request.FILES.getlist("file") 9 for file in files: 10 # 获取文件名 解析文件后缀 获取新文件名 11 oldName = file.name 12 filename = str(int(time.time() * 10))+"."+oldName.split(".")[1] 13 now = datetime.now() 14 filePath = os.path.join("developmentTask",str(user.get("userId"))+"-"+now.strftime('%Y-%m-%d')) 15 dirpath = os.path.join(settings.UPLOADFILES_DIRS , filePath) 16 #写入服务器 17 if not os.path.exists(dirpath): 18 os.makedirs(dirpath) 19 newFilePath = os.path.join(dirpath, filename) 20 with open(newFilePath, 'wb+') as destination: 21 for chunk in file.chunks(): 22 destination.write(chunk) 23 #返回新文件名 多个用逗号隔开 24 allFimeNames = os.path.join(filePath,filename) 25 except Exception: 26 return JsonResponse(data={'error': "系统异常"}, status=400) 27 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：
1 @csrf_exempt 2 @require_http_methods(["GET"]) 3 def downloadFile(request): 4 filePath = request.GET.get("filepath") 5 fileName = request.GET.get("filename") 6 file_name = os.path.join(settings.UPLOADFILES_DIRS, filePath) 7 if os.path.exists(file_name): 8 def file_iterator(file_name, chunk_size=512): 9 with open(file_name) as f: 10 while True: 11 c = f.read(chunk_size) 12 if c: 13 yield c 14 else: 15 break 16 response = StreamingHttpResponse(file_iterator(file_name)) 17 response['Content-Type'] = 'application/octet-stream' 18 response['Content-Disposition'] = 'attachment;filename="{0}"'.format(fileName) 19 return response 20 response = StreamingHttpResponse("文件不存在！") 21 response['Content-Type'] = 'application/octet-stream' 22 response['Content-Disposition'] = 'attachment;filename="{0}"'.format("") 23 return response
以上就是django上传下载的功能代码。
