Upload files with Redactor Text Editor & Django

forms.py

from django import forms


class ImageForm(forms.Form):
    file = forms.ImageField()


class FileForm(forms.Form):
    file = forms.FileField()

redactor-conf.js

/*jshint strict:true, browser:true, jquery:true */
$(function () {
    'use strict';

    $.Redactor.opts.langs.es = {
        html: 'HTML',
        image: 'Imagen',
        link: 'Enlace',
        // ....
    };

    // Enable redactor
    $('textarea').redactor({
        minHeight: 300,
        toolbarFixedTopOffset: 63,
        lang: 'es',
        imageUpload: '/redactor/upload/image/',
        fileUpload: '/redactor/upload/file/',
        fileUploadErrorCallback: function(json) {
            alert(json.error);
        }
    });
});

urls.py

from django.conf.urls import patterns, include, url
from django.conf.urls.static import static
from django.conf import settings

from app.views import RedactorUploadView
from app.forms import FileForm, ImageForm


urlpatterns = patterns(
    '',

    url('^redactor/upload/image/(?P<upload_to>.*)',
        RedactorUploadView.as_view(form_class=ImageForm),
        name='redactor_upload_image'),
    url('^redactor/upload/file/(?P<upload_to>.*)',
        RedactorUploadView.as_view(form_class=FileForm),
        name='redactor_upload_file'),
)

urlpatterns += static(
    settings.MEDIA_URL,
    document_root=settings.MEDIA_ROOT,
)

views.py

import os

from django.views.generic import FormView
from django.views.decorators.csrf import csrf_exempt
from django.utils.decorators import method_decorator
from django.core.files.storage import FileSystemStorage
from django.utils.encoding import force_str

from app.forms import ImageForm


class RedactorUploadView(FormView):
    form_class = ImageForm
    http_method_names = ('post',)
    upload_to = 'redactor/'

    @method_decorator(csrf_exempt)
    @method_decorator(staff_member_required)
    def dispatch(self, request, *args, **kwargs):
        return super(RedactorUploadView, self).dispatch(request, *args,
                                                        **kwargs)

    def form_invalid(self, form):
        try:
            error = form.errors.values()[-1][-1]
        except:
            error = 'Invalid file.'
        data = {
            'error': error,
        }
        return HttpResponse(json.dumps(data), content_type='application/json')

    def form_valid(self, form):
        upload_file = form.cleaned_data['file']

        full_path = os.path.join(self.upload_to, upload_file.name)
        storage = FileSystemStorage()
        real_path = storage.save(full_path, upload_file)
        file_name = force_str(upload_file.name)

        # get url for file if he saved else None
        file_url = storage.url(real_path)
        data = {
            'filelink': file_url,
            'filename': file_name,
        }
        return HttpResponse(json.dumps(data), content_type='application/json')