python 文件上传本地服务器

1：python之上传文件

1.1.url代码

 """untitled1222 URL Configuration

 The `urlpatterns` list routes URLs to views. For more information please see:
     https://docs.djangoproject.com/en/2.1/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('admin/', admin.site.urls),
     path('upload/',views.upload),
 ]

1.2.views代码

 from django.shortcuts import render
 from django.shortcuts import HttpResponse

 # Create your views here.
 def upload(request):
     if request.method=='GET':
         return render(request,'upload.html')
     else:
         user=request.POST.get('user')
         print(user)
         #img是一个对象，包含文件名，文件大小、内容....
         img=request.FILES.get('img')
         print(img)
         print(img.name)
         print(img.size)

         #上传到本地服务器
         f=open(img.name,'wb')
         for line in img.chunks():
             f.write(line)
         f.close()

         return HttpResponse('OK')

1.3.templates中upload.html

 <!DOCTYPE html>
 <html lang="en">
 <head>
     <meta charset="UTF-8">
     <title>Title</title>
 </head>
 <body>
 <form action="/upload/" method="post" enctype="multipart/form-data">
     <input type="text" name="user">
     <input type="file" name="img">
     <input type="submit" value="提交">
 </form>
 </body>
 </html>

1.4.效果显示

2.上传文件按钮优化

2.1按钮优化只需在原有upload.html文件中进行相关样式设置即可，重点设置透明度：opacity:0

 <!DOCTYPE html>
 <html lang="en">
 <head>
     <meta charset="UTF-8">
     <title>Title</title>
 </head>
 <body>
 <form action="/upload/" method="post" enctype="multipart/form-data">
     <input type="text" name="user">
     <div style="position: relative;">
         <a>上传</a>
     <input type="file" name="img" style="opacity: 0.2;position:absolute; top:0;left: 0;">
     </div>
     <input type="submit" value="提交">
 </form>
 <script src="/static/jquery-3.3.1.min.js"></script>
 </body>
 </html>

2.2.优化后的效果显示：

3.python之Form组件文件上传（与上述自定义上传文件的区别在：form上传文件多了验证功能）

 from django.shortcuts import render
 from django.shortcuts import HttpResponse

 # Create your views here.
 from django import forms
 from django.forms import fields
 #from组件形式的文件上传
 class UploadImg(forms.Form):
     user=fields.CharField()
     img=fields.FileField()

 def upload(request):
     if request.method=='GET':
         return render(request,'upload.html')
     else:
         OBJ=UploadImg(request.POST,request.FILES)
         if OBJ.is_valid():
             user=OBJ.cleaned_data['user']
             img=OBJ.cleaned_data['img']
             f = open(img.name, 'wb')
             for line in img.chunks():
                 f.write(line)
             f.close()
         #自定义形式文件上传
         # def upload(request):
         #     if request.method == 'GET':
         #         return render(request, 'upload.html')
         #     else:
         #         user=request.POST.get('user')
         #         print(user)
         #         #img是一个对象，包含文件名，文件大小、内容....
         #         img=request.FILES.get('img')
         #         print(img)
         #         print(img.name)
         #         print(size)
         #         f = open(img.name, 'wb')
         #         for line in img.chunks():
         #             f.write(line)
         #         f.close()
         #         return HttpResponse('OK')
         return HttpResponse('OK')