Django实现文件上传下载功能

项目介绍

最近学习django，通过文件上传下载这个小项目，总结下常用的知识点。
做这个案例我有以下需求：

1.要支持一次上传多个文件

2.支持上传后记录上传的数据以及列表展示

3.支持下载和删除文件记录

效果展示

数据库记录

开发步骤

创建项目：

django-admin startproject file_upload
cd file_upload
python manage.py startapp uploader

目录结构:

0.settings.py

LANGUAGE_CODE = 'zh-Hans'
TIME_ZONE = 'Asia/Shanghai'
USE_I18N = True
USE_L10N = True
USE_TZ = False

1.urls.py

父：

from django.contrib import admin
from django.urls import path, include

urlpatterns = [
 path('admin/', admin.site.urls),
 path('uploader/', include('uploader.urls'))
]

子：

from django.contrib import admin
from django.urls import path, include
from . import views

app_name = 'uploader'

urlpatterns = [
 path('', views.upload, name='upload'), # 上传
 path('list/', views.list), # 列表
 path('download/<id>', views.download, name='download'), # 下载
 path('delete/<id>', views.delete, name='delete'), # 删除
]

2.models.py

from django.db import models
from django.utils import timezone

'''
文件记录
'''
class FileInfo(models.Model):
 file_name = models.CharField(max_length=500)
 file_size = models.DecimalField(max_digits=10, decimal_places=0)
 file_path = models.CharField(max_length=500)
 upload_time = models.DateTimeField(default=timezone.now())

3.forms.py

from django import forms

'''
上传表单
'''
class UploadForm(forms.Form):
 file = forms.FileField(
  widget=forms.ClearableFileInput(attrs={'multiple': True}), # 支持多文件上传
  label='选择文件...',
  help_text='最大100M'
 )

4.views.py

from django.shortcuts import render
from django.http import HttpResponseRedirect
from django.http import HttpResponseRedirect
from django.http import FileResponse
from django.template import RequestContext
from django.urls import reverse
from django.utils.http import urlquote

from .models import FileInfo
from .forms import UploadForm
import os

# 上传文件
def upload(request):
 # Handle file upload
 if request.method == 'POST':
  form = UploadForm(request.POST, request.FILES)
  if form.is_valid():
   files = request.FILES.getlist('file')
   for f in files:
    file_info = FileInfo(file_name=f.name, file_size=1 if 0 < f.size < 1024 else f.size / 1024, file_path=os.path.join('D:\\upload', f.name))
    file_info.save()
    # 上传
    destination = open(os.path.join("D:\\upload", f.name), 'wb+')
    for chunk in f.chunks():
     destination.write(chunk)
    destination.close()

   # 返回上传页
   return HttpResponseRedirect('/uploader/list')
 else:
  form = UploadForm() # A empty, unbound form
 return render(request, 'uploader/upload.html', {'form': form})

# 文件列表
def list(request):
 file_infos = FileInfo.objects.all()

 return render(request, 'uploader/list.html', {'file_infos': file_infos})

# 下载文件
def download(request, id):
 file_info = FileInfo.objects.get(id=id)
 print('下载的文件名：' + file_info.file_name)
 file = open(file_info.file_path, 'rb')
 response = FileResponse(file)
 response['Content-Disposition'] = 'attachment;filename="%s"' % urlquote(file_info.file_name)
 return response

# 删除文件
def delete(request, id):
 file_info = FileInfo.objects.get(id=id)
 file_info.delete()
 file_infos = FileInfo.objects.all()

 return HttpResponseRedirect('/uploader/list')

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