关于django注册登录的例子

谁能帮忙解释一下这段代码，并且能给出1.0版本中的实现，或是一个完整的注册登录的例子

感激不尽！

之后我改正了代码现在呈现给大家关于登录与注册的完整代码：

#register view
def register(request):
    if request.method == 'POST':
        form = UserForm(request.POST)    #UserForm为自定义继承自UserCreationForm的Form类
        if form.is_valid():
            form.save()
            user = authenticate(username=form.cleaned_data['username'], password=form.cleaned_data['password1'])
            auth_login(request, user)
            if request.POST['next']:
                return HttpResponseRedirect(request.POST['next'])
            else:
                return HttpResponseRedirect('/')
        return render_to_response('registration/register_form.html', {'form':form})
    else:
        return render_to_response('registration/register_form.html', {'form':UserForm()})

#login
def login(request):
    if request.method == 'POST':
        user = authenticate(username=request.POST['username'], password=request.POST['password'])
        if user is not None:
            if user.is_active:
                auth_login(request, user)
                #登录成功
                if request.POST['next']:
                    return HttpResponseRedirect(request.POST['next'])
                else:
                    return HttpResponseRedirect('/')
            else:
                #登录失败
                return  render_to_response('registration/login.html')
        else:
            #验证失败  
            return render_to_response('registration/login.html')
    else:
        return render_to_response('registration/login.html')

# logout
def logout(request):
    #from django.core.urlresolvers import reverse
    auth_logout(request)
    return HttpResponseRedirect('/')

可是还有一个问题就是登录之后再次打开还是登录着的，

当我在settings.py中设置SESSION_COOKIE_AGE = 0

还是不能做到关闭浏览器就logout的效果？