Django学习之文件上传与下载

#test\urls
urlpatterns = [
 url(r'^admin/', admin.site.urls),
 url(r'^student/',include('stu.urls'))
]

#stu\urls
from django.conf.urls import url
import views

urlpatterns=[
 url(r'^$',views.index_view)
]

def index_view(request):
 if request.method=='GET':
 return render(request,'index.html')
 elif request.method=='POST':
 uname = request.POST.get('uname','')
 photo = request.FILES.get('photo','')
 import os
 if not os.path.exists('media'): #判断是否存在文件media，不存在则创建一个
  os.makedirs('media')
 with open(os.path.join(os.getcwd(),'media',photo.name),'wb') as fw: #以读的方式打开目录为/media/photo.name 的文件 别名为fw
  fw.write(photo.read()) #读取photo文件并将其写入(一次性读取完)
　　　　　　　for chunk in fw.chunks:
  　　fw.write(chunk)
 return HttpResponse('注册成功')
 else:
 return HttpResponse('页面跑丢了,稍后再试!')

 
 



 {% csrf_token %}
 

 姓名:
 
 

 头像:
 
 

 
 

# -*- coding: utf-8 -*-
from __future__ import unicode_literals

from django.db import models

# Create your models here.
from django.db import models
class Student(models.Model):
 sid = models.AutoField(primary_key=True)
 sname = models.CharField(max_length=30)
 photo = models.ImageField(upload_to='img')
 class Meta:
 db_table='t_stu'

 def __unicode__(self):
 return u'Student:%s' %self.sname

MEDIA_URL = '/media/'
MEDIA_ROOT = os.path.join(BASE_DIR,'media')

urlpatterns=[
 url(r'^$',views.index_view),
 　　url(r'^upload/$',views.upload_view),
 url(r'^show/$',views.showall_view)
]

def upload_view(request):
 uname = request.POST.get('uname','')
 photo = request.FILES.get('photo','')
 #入库操作
 Student.objects.create(sname = uname,photo=photo)
 return HttpResponse('上传成功')

def showall_view(request):

 stus = Student.objects.all()
 return render(request,'show.html',{'stus':stus})

 
 



 {% for stu in stus %}
  
 {% endfor %}
 

 

 
编号
 
姓名
 
图片
 
操作
 
 
{{ forloop.counter }}
  
{{ stu.sname }}
  
 
  
操作

from django.views.static import serve

if DEBUG:
 urlpatterns+=url(r'^media/(?P.*)/$', serve, {"document_root": MEDIA_ROOT}),

'django.template.context_processors.media'

urlpatterns=[
 url(r'^$',views.index_view),
 url(r'^upload/$',views.upload_view),
 url(r'^show/$',views.showall_view),
 url(r'^download/$',views.download_view)
]

import os
def download_view(request):
 #获取文件存放的位置
 filepath = request.GET.get('photo','')
 print filepath
 #获取文件的名字
 filename = filepath[filepath.rindex('/')+1:]
 print filename
 path = os.path.join(os.getcwd(),'media',filepath.replace('/','\\'))
 with open(path,'rb') as fr:
 response = HttpResponse(fr.read())
 response['Content-Type'] = 'image/png'
 # 预览模式
 response['Content-Disposition'] = 'inline;filename=' + filename
 # 附件模式
 response['Content-Disposition']='attachment;filename='+filename
 return response

 {% for stu in stus %}
  {{ forloop.counter }}
  {{ stu.sname }}
   
  下载
 {% endfor %}