class FileToUpload(models.Model):   
    title = models.CharField(max_length=50)
    file  = models.FileField(upload_to='content/')
    timestamp = models.DateTimeField(auto_now_add=True, blank=True)
 
class FileToUploadForm(ModelForm):
    class Meta:
        model = FileToUpload

def uploading_function(request):      
    if request.method == 'POST': 
        form = FileToUploadForm(request.POST, request.FILES)         
        if form.is_valid():       
            handle_uploaded_file(request.FILES['file'])
            return HttpResponseRedirect('/ok')
    else:
        form= FileToUploadForm()
    return render_to_response('mysite/FileToUpload_form.html', 
                              {'form': form})
    
def handle_uploaded_file(f):
    destination = open('%s/%s' % (MEDIA_ROOT, request.FILES['filename']), 'wb+')
    for chunk in f.chunks():
        destination.write(chunk)
    destination.close()

global name 'request' is not defined

form= FileToUploadForm()
    return render_to_response('mysite/FileToUpload_form.html', 
                              {'form': form}, context_instance=RequestContext(request))