Streaming Upload

Example app for patch in ticket #2070

First svn up -r4065

Then apply [the patch](​http://code.djangoproject.com/attachment/ticket/2070/4065-streaming_uploads_and_uploadprogress_middleware_x_progress_id_windowsfix.diff)

# settings.py
MIDDLEWARE_CLASSES = (
    'django.middleware.common.CommonMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.middleware.doc.XViewMiddleware',
    'django.middleware.upload.UploadStateMiddleware',
    'django.middleware.upload.StreamingUploadMiddleware',
)

# models.py

from django.db import models

class SomeFile(models.Model):
    description = models.CharField(maxlength=255)
    file = models.FileField(upload_to='files')

# manipulators.py

from models import SomeFile
from django import oldforms as form
from django.conf import settings

class AddFileManipulator(forms.Manipulator):

    def __init__(self):
        self.fields = (           
            forms.TextField(field_name="description", length=30, maxlength=200, is_required=True),
            forms.FileUploadField(field_name="file", is_required=True)
        )

    def do_html2python(self, new_data):

        new_new_data = {}

        new_new_data['file_path'] = os.path.join(settings.MEDIA_ROOT, filename)
        os.rename(new_data['file'], new_new_data['file_path'])

        new_new_data['description'] = new_data['description']

        new_data = new_new_data

    def save(self, new_data):
        new_object = SomeField(**new_data)
        new_object.save()
        return new_object

# views.py

from manipulators import AddFileManipulator

def upload_file(request):
    manipulator = AddFileManipulator()

    if request.method == 'POST':
        # If data was POSTed, we're trying to create a new Place.
        new_data = request.POST.copy()
        new_data.update(request.FILES)

        # Check for errors.
        errors = manipulator.get_validation_errors(new_data)

        if not errors:
            # No errors. This means we can save the data!
            manipulator.do_html2python(new_data)
            new_object = manipulator.save(new_data)

            # Redirect to the object's "edit" page. Always use a redirect
            # after POST data, so that reloads don't accidently create
            # duplicate entires, and so users don't see the confusing
            # "Repost POST data?" alert box in their browsers.
            return HttpResponseRedirect("/showuploadedfile/%i/" % new_object.id)
    else:
        # No POST, so we want a brand new form without any data or errors.
        errors = new_data = {}

    # Create the FormWrapper, template, context, response.
    form = forms.FormWrapper(manipulator, new_data, errors)
    return render_to_response('add_file.html', {'form': form})

<!-- add_file.html -->

<form enctype="multipart/form-data" method="post" action="/uploadfile/">

<p>Description: {{ form.description }} </p>
<p>File: {{ form.file_file }} </p>

</form>