Djang之基于角色的权限控制(RBAC)

class Permission(models.Model):
    url = models.CharField(max_length=64, verbose_name=‘权限‘)
    title = models.CharField(max_length=32, verbose_name=‘标题‘)

    def __str__(self):
        return self.title

    class Meta:
        verbose_name_plural = ‘权限管理‘


class Role(models.Model):
    name = models.CharField(max_length=32, verbose_name=‘角色‘)
    permissions = models.ManyToManyField(Permission, verbose_name=‘角色拥有的权限‘, blank=True)

    def __str__(self):
        return self.name

    class Meta:
        verbose_name_plural = ‘角色管理‘


class User(models.Model):
    username = models.CharField(max_length=32, verbose_name=‘用户名‘, unique=True)
    password = models.CharField(max_length=32, verbose_name=‘密码‘)
    roles = models.ManyToManyField(Role, verbose_name=‘用户的角色‘, blank=True)

    def __str__(self):
        return self.username

    class Meta:
        verbose_name_plural = ‘用户管理‘

from rbac import models
from django.shortcuts import redirect, render, HttpResponse
from django.conf import settings

def login(request):
    if request.method == ‘POST‘:
        username = request.POST.get(‘username‘)
        password = request.POST.get(‘password‘)
        obj = models.User.objects.filter(username=username, password=password).first()
        if not obj:
            error = ‘用户名或密码错误‘
            return render(request, ‘login.html‘, locals())

        # 获取权限的信息
        permission= obj.roles.all().filter(permissions__url__isnull=False).values(‘permissions__url‘,
                                                                            ‘permissions__title‘,
                                                                          ).distinct()

        # 获取登录用户的权限列表（能访问的url地址）
        request.session[‘permission‘] = list(permission)
        request.session[‘is_login‘] = 1
        return redirect(‘index‘)

    return render(request, ‘login.html‘, locals())    

#白名单：无需登录，就可以访问的路径
WHITE_LIST = [
    r‘/login/‘,
    r‘^/admin/‘,
]

#免认证名单 登录之后的用户都可以访问的url
PUBLIC_LIST = [
    r‘/index/‘,
]

from django.utils.deprecation import MiddlewareMixin
from django.conf import settings
from django.shortcuts import redirect, HttpResponse
import re

class AuthMiddleware(MiddlewareMixin):
    def process_request(self, request):
        url = request.path_info  # 当前页面的url地址
        # 白名单 ：登陆、注册、admin
        for i in settings.WHITE_LIST: # WHITE_LIST是配置在settings.py文件中的地址白名单
            if re.match(i, url):
                return

        # 登陆验证
        is_login = request.session.get(‘is_login‘)
        if is_login != 1:
            return redirect(‘login‘)

        # 免认证 登录之后所有人都能访问的地址如：后台首页
        for i in settings.PUBLIC_LIST:
            if re.match(i, url):
                return

        # 权限验证 我们在登录函数中将当前登录用户中的所有权限（url地址列表）都放入到了session中，这里拿出来和当前的url地址进行匹配。
        permission = request.session.get(‘permission ‘)
        for i in permission:
            if re.match(r‘^{}$‘.format(i[‘url‘]), url):
                return
        return HttpResponse(‘没有权限，请联系管理员！‘)

# -*- coding: utf-8 -*-
# __author__ = "maple"
from django import template
from django.conf import settings
import re
register = template.Library()
@register.inclusion_tag(‘menu_tag.html‘) # menu_tag.html文件时配合该函数做模板渲染的，是该标签的一部分
def menu(request):
    """
   当当前url地址与menu_list中的url地址能够匹配到时，给menu_list中    
   的匹配到的地址添加一个键值对{"class":"active"}
    """
    url = request.path_info
    # 添加激活的样式
    for i in menu_list:
        if re.match(f‘^{i["url"]}$‘,url):
            i[‘class‘] = ‘active‘
            break
    return {‘menu_list‘:menu_list}

# menu_list的数据格式如：
#    [{‘url‘:‘/customer/list/‘},{‘url‘:‘/customer/add/‘},]
# 假如当前url地址为：/customer/list/时
#    则 menu_list中数据会变为：
#    [{‘url‘:‘/customer/list/‘,"class":"active"},{‘url‘:‘/customer/add/‘},]

<div class="static-menu">
    {% for menu in menu_list %}
        <a href="{{ menu.url}}" class="{{menu.class}}">{{ menu.title}}</a>
    {% endfor %}
</div>

    ...
<div class="left-menu">
   <div class="menu-body">
        {% load my_tags %}
        {% menu request %}
</div>
    ...