1、django.admin.py  startproject   cs3

cd cs3

django.admin.py   startapp   blog

2、    vim urls.py

url(r'^regist/$','blog.views.regist'),       注册

    url(r'^login/$','blog.views.login'),　　 登录

    url(r'^index/$','blog.views.index'),      跳转界面

    url(r'^logout/$','blog.views.logout'),    注销

)

3、vim blog/views.py

from   django  import  forms

from django.http  import  HttpResponse

from django.shortcuts  import  render_to_response

from  models  import User

class UserForm(forms.Form):

        username =  forms.CharField()

        password = forms.CharField(widget=forms.PasswordInput)

def regist(req):

        if req.method == "POST":

                uf = UserForm(req.POST)

                if uf.is_valid():

                        username = uf.cleaned_data['username']

                        password = uf.cleaned_data['password']

                        User.objects.create(username=username,password=password)

                        return HttpResponse('ok')

        else:

                uf = UserForm

        return render_to_response('regist.html',{'uf':uf})

4、vim blog/templates/regist.html

<form method="post">

{

{uf.as_p}}

<input type="submit" value='nice'/ >

</form>

5、      python  manage.py syncdb

  python manage.py   runserver

进入页面去试一试127.0.0.1:8000/regist

6、vim blog/views.py

增加这些

 from django.http import HttpResponseRedirect

 def login(req):

 23         if req.method == "POST":

 24                 uf = UserForm(req.POST)

 25                 if uf.is_valid():

 26                         username = uf.cleaned_data['username']

 27                         password = uf.cleaned_data['password']

 28                         users = User.objects.filter(username__exact=username,password__exact=password)

 29                         if users:

 30                                 return HttpResponseRedirect('/index/')

 31                         else:

 32                                 return HttpResponseRedirect('/login/')

 33         else:

 34                 uf = UserForm()

 35         return render_to_response('login.html',{'uf':uf})

 36 def index(req):

 37         return HttpResponse('ok')

再去试一试127.0.0.1:8000/login   会跳转到index   127.0.0.1:8000/index   直接访问index会返回OK

6、vim blog/views.py      顺便cp  regist.html  login.html

def index(req):

        username = req.COOKIES.get('username','')           用cook获取用户名，在网页界面还可以去查找，在freference-->privacy-->选use custome                        　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　for　settings  history -->show cookies就可以看到了

        return render_to_response('index.html', {'username':username})

def logout(req):

        response = HttpResponse('logout')

        response.delete_cookie('username')                        cookie 的删除方式

        return response

    7  、 vim blog/templates/index.html        

  <div>

<h1>welcome {

{username}}</h1>

<a href='/logout/'>logout</a>

</div>

这样index下就会有个logout可以选择退出