用python写一个简单的文件上传

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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：

			
<!DOCTYPE html>
<html lang="en">
<head>
   <meta charset="UTF-8">
   <title>upload</title>
</head>
<body>
{# 上传文件的form表单必须要加上enctype="multipart/form-data" #}
<form action="/upload/" method="post" enctype="multipart/form-data">
   <input type="file" name="upload_files">
   <input type="submit" value="提交">
</form>
</body>
</html>
			

			
from django.shortcuts import render,HttpResponse

# Create your views here.

# CBV方式（class base views）
from django.views import View
class Upload(View):
   def post(self,request):
       '''
       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。
       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。
       :param request:
       :return:
       '''
       # 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
       filename = request.FILES['upload_files'].name
       # 在项目目录下新建一个文件
       with open(filename,'wb') as f:
           # 从上传的文件对象中一点一点读
           for chunk in request.FILES['upload_files'].chunks():
               # 写入本地文件
               f.write(chunk)
       return HttpResponse('上传ok')

   def get(self,request):
       return render(request, 'uploadFiles.html')
			

			
"""day67 URL Configuration

The `urlpatterns` list routes URLs to views. For more information please see:
   https://docs.djangoproject.com/en/2.2/topics/http/urls/
Examples:
Function views
   1. Add an import:  from my_app import views
   2. Add a URL to urlpatterns:  path('', views.home, name='home')
Class-based views
   1. Add an import:  from other_app.views import Home
   2. Add a URL to urlpatterns:  path('', Home.as_view(), name='home')
Including another URLconf
   1. Import the include() function: from django.urls import include, path
   2. Add a URL to urlpatterns:  path('blog/', include('blog.urls'))
"""
from django.contrib import admin
from django.urls import path
from app01 import views

urlpatterns = [
   path('upload/',views.Upload.as_view() ),
]
			

　　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。

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