用python写一个简单的文件上传

　　用Pycharm创建一个django项目。目录如下：

 1 
 2 "en">
 3 
 4     "UTF-8">
 5     
 6 
 7 
 8 {# 上传文件的form表单必须要加上enctype="multipart/form-data" #}
 9 
"/upload/" method="post" enctype="multipart/form-data">
10     "file" name="upload_files">
11     "submit" value="提交">
12 
13 
14 

uploadFiles.html

 1 from django.shortcuts import render,HttpResponse
 2 
 3 # Create your views here.
 4 
 5 # CBV方式（class base views）
 6 from django.views import View
 7 class Upload(View):
 8     def post(self,request):
 9         '''
10         保存上传文件前，数据需要存放在某个位置。默认当上传文件小于2.5M时，django会将上传文件的全部内容读进内存。从内存读取一次，写磁盘一次。
11         但当上传文件很大时，django会把上传文件写到临时文件中，然后存放到系统临时文件夹中。
12         :param request:
13         :return:
14         '''
15         # 从请求的FILES中获取上传文件的文件名，file为页面上type=files类型input的name属性值
16         filename = request.FILES['upload_files'].name
17         # 在项目目录下新建一个文件
18         with open(filename,'wb') as f:
19             # 从上传的文件对象中一点一点读
20             for chunk in request.FILES['upload_files'].chunks():
21                 # 写入本地文件
22                 f.write(chunk)
23         return HttpResponse('上传ok')
24 
25     def get(self,request):
26         return render(request, 'uploadFiles.html')

views.py

 1 """day67 URL Configuration
 2 
 3 The `urlpatterns` list routes URLs to views. For more information please see:
 4     https://docs.djangoproject.com/en/2.2/topics/http/urls/
 5 Examples:
 6 Function views
 7     1. Add an import:  from my_app import views
 8     2. Add a URL to urlpatterns:  path('', views.home, name='home')
 9 Class-based views
10     1. Add an import:  from other_app.views import Home
11     2. Add a URL to urlpatterns:  path('', Home.as_view(), name='home')
12 Including another URLconf
13     1. Import the include() function: from django.urls import include, path
14     2. Add a URL to urlpatterns:  path('blog/', include('blog.urls'))
15 """
16 from django.contrib import admin
17 from django.urls import path
18 from app01 import views
19 
20 urlpatterns = [
21     path('upload/',views.Upload.as_view() ),
22 ]

urls.py

　　注意settings.py中的这一行要注释掉

'django.middleware.csrf.CsrfViewMiddleware',

　　点击运行，文件会上传到项目的根目录下面。