Django：登录、注册、退出

创建项目：

一、创建项目

django-admin startproject form_test

二、创建应用

1、cd form_test
2、sudo ./manage.py startapp form_app

三、配置应用

1、vim setting.py
2、在INSTALLED_APPS添加刚创建的应用（’form_app’）

四、创建url（form_test/urls.py）

#form_test/urls.py

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

from django.contrib import admin

urlpatterns = patterns('',

    # Examples:

    # url(r'^$', 'form_test.views.home', name='home'),

    # url(r'^blog/', include('blog.urls')),

    url(r'^admin/', include(admin.site.urls)),

    url(r'^$', 'form_app.views.login',name='login'),

    url(r'^login/$', 'form_app.views.login',name='login'),

    url(r'^regist/$', 'form_app.views.regist',name='regist'),

    url(r'^index/$', 'form_app.views.index',name='index'),

    url(r'^logout/$', 'form_app.views.logout',name='logout'),

    url(r'^share/$', 'form_app.views.share',name='share'),

)

五、创建数据库对象（form_app/models.py）

from django.db import models

# Create your models here.

class User(models.Model):

    username = models.CharField(max_length=50)

    password = models.CharField(max_length=50)

    def __unicode__(self):

        return self.username

六、编写视图（/form_app/views.py）

#coding:utf-8

from django.shortcuts import render,render_to_response

from django import forms

from django.http import HttpResponse,HttpResponseRedirect

from django.template import RequestContext

from models import User

# Create your views here.

#表单

class UserForm(forms.Form):

    username = forms.CharField(label='用户名',max_length=100)

    password = forms.CharField(label='密__码',widget=forms.PasswordInput())

def regist(req):

    if req.method == 'POST':

        uf = UserForm(req.POST)

        if uf.is_valid():

            #获取表单数据

            username = uf.cleaned_data['username']

            password = uf.cleaned_data['password']

            #添加到数据库

            #User.objects.get_or_create(username = username,password = password)

            registAdd = User.objects.get_or_create(username = username,password = password)[1]

            if registAdd == False:

                #return HttpResponseRedirect('/share/')

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

            else:

                return render_to_response('share.html',{'registAdd':registAdd})

    else:

        uf = UserForm()

    return render_to_response('regist.html',{'uf':uf},context_instance=RequestContext(req))

def login(req):

    if req.method == 'POST':

        uf = UserForm(req.POST)

        if uf.is_valid():

            username = uf.cleaned_data['username']

            password = uf.cleaned_data['password']

            #对比提交的数据与数据库中的数据

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

            if user:

                #比较成功，跳转index

                response = HttpResponseRedirect('/index/')

                #将username写入浏览器cookie，失效时间为3600

                response.set_cookie('username',username,3600)

                return response

            else:

                return HttpResponseRedirect('/login/')

    else:

        uf = UserForm()

    return render_to_response('login.html',{'uf':uf},context_instance=RequestContext(req))

#登录成功

def index(req):

    username = req.COOKIES.get('username','')

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

#退出登录

def logout(req):

    response = HttpResponse('logout!!!')

    #清除cookie里保存的username

    response.delete_cookie('username')

    return response

def share(req):

    if req.method == 'POST':

        uf = UserForm(req.POST)

        if uf.is_valid():

            username = uf.cleaned_data['username']

            password = uf.cleaned_data['password']

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

    else:

        uf = UserForm()

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

七、创建templates（form_app/templates）

1、cd templates
2、sudo touch share.html、regist.html、login.html、logout.html、index.html
3、share.html

{{registAdd}}

<br>

==================

<br>

{% if  username %}

注册失败{{username}}已存在

<a href="http://127.0.0.1:8000/regist">注册</a>

{% else %}

注册成功！

<a href="http://127.0.0.1:8000/login">登录</a>

{% endif %}

4、regist.html

<!DOCTYPE html>

<html>

<head>

    <meta charset="utf-8">

    <title>Regist</title>

</head>

<body>

<h1>注册页面</h1>

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

    {% csrf_token %}

    {{uf.as_p}}

    <input type="submit" value="ok"></input>

</form>

<a href="http://127.0.0.1:8000/login">登录</a>

</body>

</html>

5、login.html

<!DOCTYPE html>

<html>

<head>

    <meta charset="utf-8">

    <title>Login</title>

</head>

<body>

<h1>登录页面</h1>

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

    {% csrf_token %}

    {{uf.as_p}}

    <input type="submit" value="ok"></input>

</form>

<a href="http://127.0.0.1:8000/regist">注册</a>

</body>

</html>

6、index.html

<!DOCTYPE html>

<html>

<head>

    <title>index</title>

</head>

<body>

<h1>Welcome {{ username }}!</h1>

<br>

<a href="http://127.0.0.1:8000/logout">退出</a>

</body>

</html>

巴特西