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Django 后台管理之登录和注销

Session：
session是服务器端生成保存的一个键值对 , session内部机制依赖于cookie 。用户登录后返回给客户端一个随机字符串，客户端带着随机字符串访问服务器，用于验证是否登录。

用户登录并创建session:

def login(request):
    """
    :type request: object
    """
    message = ""
    if request.method == "POST":

        #获取登录用户和密码 并验证
        user = request.POST.get('username')
        passwd = request.POST.get('password')
        print(user, passwd)
        c = models.Administrator.objects.filter(username=user, password=passwd).count()
        if c:
            #验证通过, 创建session键值对
            request.session['is_login'] = True
            request.session['username'] = user

            req = redirect('/index')
            print(req)
            # req.set_cookie('username',user)
            return req
        else:
            #验证失败报错
            message = "用户名或密码错误！"
    return render(request, 'login.html', {'msg': message})

装饰器:用于判断是否登录

def auth(func):
    def inner(request,*args,**kwargs):
        is_login=request.session.get('is_login')
        if is_login:
            return func(request,*args,**kwargs)
        else:
            return redirect('/login')
    return inner

注销登录

@auth
def logout(request):

    #session的键  session_key:  dict_keys(['is_login', 'username'])
    session_key=request.session.keys()
    print("session_key: ", session_key)

    #值   session_values:  dict_values([True, 'root'])
    session_values=request.session.values()
    print("session_values: ",session_values)

    #全部  session_items:  dict_items([('is_login', True), ('username', 'root')])
    session_items=request.session.items()
    print("session_items: ",session_items)

    # session 的key （后台生成的随机字符串）   key:  rk2o5cr47ychj0kgk6a7c5854d1zosrv
    key=request.session.session_key   #
    print("key: ",key)

    # 将所有Session失效日期小于当前日期的数据删除
    request.session.clear_expired()

    # 检查 用户session的随机字符串 在数据库中是否
    request.session.exists("session_key")

    #注销登录信息，但是数据库依然保留了key和values
    request.session.clear()
    session_items=request.session.items()
    print("session_items: ",session_items)

    # 删除当前用户的所有Session数据
    request.session.delete("session_key")

    #注销,删除session数据库表中的数据，达到注销的效果
    request.session.delete(key)
    return redirect("/login")

用面向对象的方法实现登录和注销

from django import views
from django.utils.decorators import method_decorator

def outer(func):
    def inner(request, *args, **kwargs):
        print(request.method)
        return func(request, *args, **kwargs)
    return inner

class Order(views.View):
    pass
# CBV
# @method_decorator(outer, name='dispatch')
class Login(views.View):

    # @method_decorator(outer)
    def dispatch(self, request, *args, **kwargs):
        ret = super(Login, self).dispatch(request, *args, **kwargs)
        return ret

    def get(self,request, *args, **kwargs):
        print('GET')
        return render(request, 'login.html', {'msg': ''})

    def post(self, request, *args, **kwargs):
        print('POST')
        user = request.POST.get('user')
        pwd = request.POST.get('pwd')
        c = models.Administrator.objects.filter(username=user, password=pwd).count()
        if c:
            request.session['is_login'] = True
            request.session['username'] = user
            rep = redirect('/index.html')
            return rep
        else:
            message = "用户名或密码错误"
            return render(request, 'login.html', {'msg': message})

html前端界面

<!DOCTYPE html>
<html lang="en" class="no-js">
    <head>
        <meta charset="utf-8">
        <title>后台管理登录</title>

<style>
         /*
         *
         * Template Name: Fullscreen Login
         * Description: Login Template with Fullscreen Background Slideshow
         * Author: Anli Zaimi
         * Author URI: http://azmind.com
         *
         */


        body {
            background: #f8f8f8;
            font-family: 'PT Sans', Helvetica, Arial, sans-serif;
            text-align: center;
            color: #fff;
            background-color: aquamarine;
        }

        .page-container {
            margin: 120px auto 0 auto;
        }

        h1 {
            font-size: 30px;
            font-weight: 700;
            text-shadow: 0 1px 4px rgba(0,0,0,.2);
        }

        form {
            position: relative;
            width: 305px;
            margin: 15px auto 0 auto;
            text-align: center;
        }

        input {
            width: 270px;
            height: 42px;
            margin-top: 25px;
            padding: 0 15px;
            background: #2d2d2d; /* browsers that don't support rgba */
            background: rgba(45,45,45,.15);
            -moz-border-radius: 6px;
            -webkit-border-radius: 6px;
            border-radius: 6px;
            border: 1px solid #3d3d3d; /* browsers that don't support rgba */
            border: 1px solid rgba(255,255,255,.15);
            -moz-box-shadow: 0 2px 3px 0 rgba(0,0,0,.1) inset;
            -webkit-box-shadow: 0 2px 3px 0 rgba(0,0,0,.1) inset;
            box-shadow: 0 2px 3px 0 rgba(0,0,0,.1) inset;
            font-family: 'PT Sans', Helvetica, Arial, sans-serif;
            font-size: 14px;
            color: #fff;
            text-shadow: 0 1px 2px rgba(0,0,0,.1);
            -o-transition: all .2s;
            -moz-transition: all .2s;
            -webkit-transition: all .2s;
            -ms-transition: all .2s;
        }

        input:-moz-placeholder { color: #fff; }
        input:-ms-input-placeholder { color: #fff; }
        input::-webkit-input-placeholder { color: #fff; }

        input:focus {
            outline: none;
            -moz-box-shadow:
                0 2px 3px 0 rgba(0,0,0,.1) inset,
                0 2px 7px 0 rgba(0,0,0,.2);
            -webkit-box-shadow:
                0 2px 3px 0 rgba(0,0,0,.1) inset,
                0 2px 7px 0 rgba(0,0,0,.2);
            box-shadow:
                0 2px 3px 0 rgba(0,0,0,.1) inset,
                0 2px 7px 0 rgba(0,0,0,.2);
        }

        button {
            cursor: pointer;
            width: 300px;
            height: 44px;
            margin-top: 25px;
            padding: 0;
            background: #ef4300;
            -moz-border-radius: 6px;
            -webkit-border-radius: 6px;
            border-radius: 6px;
            border: 1px solid #ff730e;
            -moz-box-shadow:
                0 15px 30px 0 rgba(255,255,255,.25) inset,
                0 2px 7px 0 rgba(0,0,0,.2);
            -webkit-box-shadow:
                0 15px 30px 0 rgba(255,255,255,.25) inset,
                0 2px 7px 0 rgba(0,0,0,.2);
            box-shadow:
                0 15px 30px 0 rgba(255,255,255,.25) inset,
                0 2px 7px 0 rgba(0,0,0,.2);
            font-family: 'PT Sans', Helvetica, Arial, sans-serif;
            font-size: 14px;
            font-weight: 700;
            color: #fff;
            text-shadow: 0 1px 2px rgba(0,0,0,.1);
            -o-transition: all .2s;
            -moz-transition: all .2s;
            -webkit-transition: all .2s;
            -ms-transition: all .2s;
        }

        button:hover {
            -moz-box-shadow:
                0 15px 30px 0 rgba(255,255,255,.15) inset,
                0 2px 7px 0 rgba(0,0,0,.2);
            -webkit-box-shadow:
                0 15px 30px 0 rgba(255,255,255,.15) inset,
                0 2px 7px 0 rgba(0,0,0,.2);
            box-shadow:
                0 15px 30px 0 rgba(255,255,255,.15) inset,
                0 2px 7px 0 rgba(0,0,0,.2);
        }

        button:active {
            -moz-box-shadow:
                0 15px 30px 0 rgba(255,255,255,.15) inset,
                0 2px 7px 0 rgba(0,0,0,.2);
            -webkit-box-shadow:
                0 15px 30px 0 rgba(255,255,255,.15) inset,
                0 2px 7px 0 rgba(0,0,0,.2);
            box-shadow:
                0 5px 8px 0 rgba(0,0,0,.1) inset,
                0 1px 4px 0 rgba(0,0,0,.1);

            border: 0px solid #ef4300;
        }

        .error {
            display: none;
            position: absolute;
            top: 27px;
            right: -55px;
            width: 40px;
            height: 40px;
            background: #2d2d2d; /* browsers that don't support rgba */
            background: rgba(45,45,45,.25);
            -moz-border-radius: 8px;
            -webkit-border-radius: 8px;
            border-radius: 8px;
        }

        .error span {
            display: inline-block;
            margin-left: 2px;
            font-size: 40px;
            font-weight: 700;
            line-height: 40px;
            text-shadow: 0 1px 2px rgba(0,0,0,.1);
            -o-transform: rotate(45deg);
            -moz-transform: rotate(45deg);
            -webkit-transform: rotate(45deg);
            -ms-transform: rotate(45deg);

        }

        </style>
    </head>

    <body>

        <div class="page-container">
            <h1>登录</h1>
            <form action="" method="post">
                {% csrf_token %}
                <input type="text" name="username" class="username" placeholder="用户名">
                <input type="password" name="password" class="password" placeholder="密码">
                <span style="color: red">{{ msg }}</span>
                <button type="submit">提交</button>
                <div class="error"><span>+</span></div>
            </form>
        </div>
    </body>

    <script src="/static/jquery-2.1.4.min.js"></script>
    <script>
        jQuery(document).ready(function() {
            $('.page-container form').submit(function(){
                var username = $(this).find('.username').val();
                var password = $(this).find('.password').val();
                if(username == '') {
                    $(this).find('.error').fadeOut('fast', function(){
                        $(this).css('top', '27px');
                    });
                    $(this).find('.error').fadeIn('fast', function(){
                        $(this).parent().find('.username').focus();
                    });
                    return false;
                }
                if(password == '') {
                    $(this).find('.error').fadeOut('fast', function(){
                        $(this).css('top', '96px');
                    });
                    $(this).find('.error').fadeIn('fast', function(){
                        $(this).parent().find('.password').focus();
                    });
                    return false;
                }
            });

            $('.page-container form .username, .page-container form .password').keyup(function(){
                $(this).parent().find('.error').fadeOut('fast');
            });

        });
    </script>

</html>

登录界面

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>{% block title %} welcome  {% endblock %}</title>
    <style>

        *{
            margin: 0px;
            padding: 0px;
        }
        .page_head{
            position: absolute;
            width: 100%;
            top: 0;
            left: 0;
            height: 48px;
            background-color: aquamarine;
        }
        .page_head_memu{
            position: relative;
            float: left;
            height: 48px;
            width: 100%;
            line-height: 48px;
            text-align: center;

        }
        .page_head_memu .span_names{
            font-size: 30px;
        }

        .action-right{
            position: absolute;
            top: 5px;;
            right: 10px;
            height: 48px;
            width: 100px;
        }
        .action-right a{
            color: #3d3d3d;
            text-decoration: none;
        }

        .action-right #img_head{
            height: 40px;
            width: 40px;
            border-radius: 50%;
            float: left;
            font-size: 10px;

        }
        .action-right #img_head:hover{
            width: 50px;
            height: 50px;
        }



        .memu{
            position: absolute;
            width: 150px;
            height: 550px;
            top: 50px;
            left: 20px;
            bottom: 0px;
            border: 1px solid #c0cddf;
            overflow :auto
        }
        .memu .items{
            display: block;
            text-decoration: none;
            padding: 5px 10px;
            margin: 5px 10px;

        }
        .new{
            background-color: #2d2d2d;
        }
        .content{
            position:absolute;
            left: 175px;
            right: 0;
            top: 50px;
            bottom:0;
            background-color: azure;

        }
        .menu .items.active{
                    background-color: black;
                    color: white;
                }



                #mytable {
            width: 1000px;
            padding: 0;
            margin: 0;
        }

        caption {
            padding: 0 0 5px 0;
            width: 700px;
            font: italic 20px "Trebuchet MS", Verdana, Arial, Helvetica, sans-serif;
            text-align: right;
        }

        th {
            font: bold 20px "Trebuchet MS", Verdana, Arial, Helvetica, sans-serif;
            color: #4f6b72;
            border-right: 1px solid #C1DAD7;
            border-bottom: 1px solid #C1DAD7;
            border-top: 1px solid #C1DAD7;
            letter-spacing: 2px;
            text-transform: uppercase;
            text-align: left;
            padding: 6px 6px 6px 12px;
            background: #CAE8EA  no-repeat;
        }

        th.nobg {
            border-top: 0;
            border-left: 0;
            border-right: 1px solid #C1DAD7;
            background: none;
        }

        td {
            border-right: 1px solid #C1DAD7;
            border-bottom: 1px solid #C1DAD7;
            background: #fff;
            font-size:16px;
            padding: 6px 6px 6px 12px;
            color: #4f6b72;
        }


        td.alt {
            background: #F5FAFA;
            color: #797268;
        }

        th.spec {
            border-left: 1px solid #C1DAD7;
            border-top: 0;
            background: #fff no-repeat;
            font: bold 10px "Trebuchet MS", Verdana, Arial, Helvetica, sans-serif;
        }

        th.specalt {
            border-left: 1px solid #C1DAD7;
            border-top: 0;
            background: #f5fafa no-repeat;
            font: bold 10px "Trebuchet MS", Verdana, Arial, Helvetica, sans-serif;
            color: #797268;
        }

        #mytable td:hover{
            background-color: #C1DAD7;
        }

        {% block css %}

        {% endblock %}
    </style>

</head>


<body>
    <div class="page_head">
        <div class="page_head_memu">
            <span class="span_names">后台管理</span>
        </div>
        <div class="action-right">
            <a id="info" href="/logout"><img id="img_head" alt="传个头像吧" title="点击注销登录" src="/{{ img_list.0.path }}" /></a>
            <a class="action-nav">{{ username }}</a>
            <a href="#" class="action-nav username" style="float:left;display: none">注销</a><br>
            <a style="font-size: 8px">版本：V1.0</a>
        </div>

    </div>

    <div class="memu">
        <a href="/classes/" class="items" id="memu_classes">班级管理</a>
        <a href="/student/" class="items" id="memu_student">学生管理</a>
        <a href="/teacher/" class="items" id="memu_teacher">教师管理</a>
    </div>
    <div class="content">
        {% block content %}
            <div style=" 700px">
                <form method="POST" action="" enctype="multipart/form-data" style=" 600px">
                    <input type="file" name="fafafa" />
                    <input type="submit" value="提交" />
                </form>

                <div>
                    {% for item in img_list %}
                        <img style="height: 40px; 40px;border-radius: 50%" src="/{{ item.path }}" />
                    {% endfor %}
                </div>

            </div>
        {% endblock %}
    </div>

{#    <div class="page_foot"></div>#}

<script src="/static/jquery-2.1.4.min.js"></script>
<!--<script>
    $('.memu a').click(function(){
              $(this).siblings().removeClass('new');
              $(this).addClass('new');
        })
</script>-->

{% block js %} {% endblock %}
</body>

</html>

主界面--包括注销登录部分

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原文地址：https://www.cnblogs.com/noube/p/6180465.html

Django 后台管理 之登录和注销

用户登录并创建session:

装饰器:用于判断是否登录

注销登录

用面向对象的方法实现 登录和注销

html前端界面

Django 后台管理之登录和注销

用面向对象的方法实现登录和注销