專案介紹

最近學習django，通過檔案上傳下載這個小專案，總結下常用的知識點。
做這個案例我有以下需求：

1.要支援一次上傳多個檔案

2.支援上傳後記錄上傳的資料以及列表展示

3.支援下載和刪除檔案記錄

效果展示

資料庫記錄

開發步驟

建立專案：

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

目錄結構:

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'),# 上傳
 path('list/',views.list),# 列表
 path('download/<id>',views.download,name='download'),# 下載
 path('delete/<id>',views.delete,name='delete'),# 刪除
]

2.models.py

from django.db import models
from django.utils import timezone
 
'''
檔案記錄
'''
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
 
'''
上傳表單
'''
class UploadForm(forms.Form):
 file = forms.FileField(
  widget=forms.ClearableFileInput(attrs={'multiple': True}),# 支援多檔案上傳
  label='選擇檔案...',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
 
 
# 上傳檔案
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()
    # 上傳
    destination = open(os.path.join("D:\\upload",f.name),'wb+')
    for chunk in f.chunks():
     destination.write(chunk)
    destination.close()
 
   # 返回上傳頁
   return HttpResponseRedirect('/uploader/list')
 else:
  form = UploadForm() # A empty,unbound form
 return render(request,'uploader/upload.html',{'form': form})
 
 
# 檔案列表
def list(request):
 file_infos = FileInfo.objects.all()
 
 return render(request,'uploader/list.html',{'file_infos': file_infos})
 
 
# 下載檔案
def download(request,id):
 file_info = FileInfo.objects.get(id=id)
 print('下載的檔名：' + 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
 
 
# 刪除檔案
def delete(request,id):
 file_info = FileInfo.objects.get(id=id)
 file_info.delete()
 file_infos = FileInfo.objects.all()
 
 return HttpResponseRedirect('/uploader/list')

以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支援我們。