Django处理文件上传File Uploads的实例

<form enctype="multipart/form-data" method="post" action="/foo/">
<input type="file" name="image" />

img=request.FILES['image']

UploadedFile.read()

UploadedFile.multiple_chunks(chunk_size=None)

UploadedFile.chunks(chunk_size=None)

UploadedFile.name

UploadedFile.size

UploadedFile.content_type

UpladedFile.charset

f=request.FILES['image']
with open('some/file/name.txt', 'wb+') as destination:
 for chunk in f.chunks():
  destination.write(chunk)

# In forms.py...
from django import forms
 
class UploadFileForm(forms.Form):
 title = forms.CharField(max_length=50)
 file = forms.FileField()

> f =UploadFileFormt(request.POST, request.FILES)

from django.http import HttpResponseRedirect
from django.shortcuts import render_to_response
from .forms import UploadFileForm
 
def handle_uploaded_file(f):
 with open('some/file/name.txt', 'wb+') as destination:
  for chunk in f.chunks():
   destination.write(chunk)
 
def upload_file(request):
 if request.method == 'POST':
  form = UploadFileForm(request.POST, request.FILES)
  if form.is_valid():
   handle_uploaded_file(request.FILES['file'])
   return HttpResponseRedirect('/success/url/')
 else:
  form = UploadFileForm()
 return render_to_response('upload.html', {'form': form})

from django.db import models
 
class NicEditImage(models.Model):
 image = models.ImageField(upload_to='nicedit/%Y/%m/%d')

from django import forms
 
class NicEditImageForm(forms.ModelForm):
 class Meta:
  model = NicEditImage

def upload(request):
 if not request.user.is_authenticated():
  json = simplejson.dumps({
   'success': False,
   'errors': {'__all__': 'Authentication required'}})
  return HttpResponse(json, mimetype='application/json')
 form = NicEditImageForm(request.POST or None, request.FILES or None)
 if form.is_valid():
  image = form.save() #保存Form和Model
  json = simplejson.dumps({
   'success': True,
   'upload': {
    'links': {
     'original': image.image.url},
    'image': {
     'width': image.image.width,
     'height': image.image.height}
   }
  })
 else:
  json = simplejson.dumps({
   'success': False, 'errors': form.errors})
 return HttpResponse(json, mimetype='application/json')

from django.http import HttpResponseRedirect
from django.shortcuts import render
from .forms import UploadFileForm
from .models import ModelWithFileField
 
def upload_file(request):
 if request.method == 'POST':
  form = UploadFileForm(request.POST, request.FILES)
  if form.is_valid():
   instance = ModelWithFileField(file_field=request.FILES['file']) #保存文件到FileField域
   instance.save()
   return HttpResponseRedirect('/success/url/')
 else:
  form = UploadFileForm()
 return render(request, 'upload.html', {'form': form})

from django.db import models
 
class Car(models.Model):
 name = models.CharField(max_length=255)
 price = models.DecimalField(max_digits=5, decimal_places=2)
 photo = models.ImageField(upload_to='cars')

> car = Car.objects.get(name="57 Chevy")
> car.photo
<ImageFieldFile: chevy.jpg>
> car.photo.name
u'cars/chevy.jpg'
> car.photo.path
u'/media/cars/chevy.jpg'
> car.photo.url
u'http://media.example.com/cars/chevy.jpg'

FieldFile.save(name, content, save=True)

> car.photo.save('myphoto.jpg', content, save=False)
> car.save()

> car.photo.save('myphoto.jpg', content, save=True)

from django.core.files.base import ContentFile
photo=request.FILES.get('photo','')
if photo: 
 file_content = ContentFile(photo.read()) #创建File对象
 car.photo.save(photo.name, file_content) #保存文件到car的photo域
 car.save()