diango录入权限，rbac

一.权限概念：
　　什么是权限：一个含义正则表达式的url

二.基于RBAC设计表关系：

设置权限首先得有权限表，管理角色权限：

model：

class User(models.Model):
        name=models.CharField(max_length=32)
        pwd=models.CharField(max_length=32)
        roles=models.ManyToManyField("Role")
        def __str__(self):
            return self.name

    class Role(models.Model):
        title=models.CharField(max_length=32)
        permissions=models.ManyToManyField("Permission")
        def __str__(self):
            return self.title
    class Permission(models.Model):
        title=models.CharField(max_length=32)
        url=models.CharField(max_length=32)

        def __str__(self):
            return self.title

然后基于admin录入数据。

然后进行权限的录入和校验

1 ，登录认证：将登陆用户的权限注入session

在rbac应用中创建一个service包放处理中间件的文件和rbac文件

rbac.py

from rbac.models import Role


def initial_sesson(user,request):
    """
    功能：将当前登录人的所有权限录入session中
    :param user: 当前登录人
    """
    # 查询当前登录人的所有权限列表
    # 查看当前登录人的所有角色
    # ret=Role.objects.filter(user=user)
    permissions = Role.objects.filter(user=user).values("permissions__url",
                                                        "permissions__is_menu",
                                                        "permissions__title",
                                                        "permissions__icon",
                                                        ).distinct() # distinct去重
    print(permissions)

    permission_list = []
    permission_menu_list = []

    for item in permissions:
        # 构建权限列表
        permission_list.append(item["permissions__url"])

        # 构建菜单权限列表
        if item["permissions__is_menu"]:
            permission_menu_list.append({
                "title":item["permissions__title"],
                "icon":item["permissions__icon"],
                "url":item["permissions__url"],
            })

    # 将当前登录人的权限列表注入session中
    request.session["permission_list"] = permission_list
    # 将当前登录人的菜单权限列表注入session中
    print("permission_menu_list",permission_menu_list)
    request.session["permission_menu_list"] = permission_menu_list

view视图：

from django.shortcuts import render, HttpResponse, redirect, reverse
from rbac.models import User
from rbac.service.rbac import initial_sesson
def login(request):

    if request.method == "POST":
        # 认证

        user = request.POST.get("user")
        pwd = request.POST.get("pwd")
        user = User.objects.filter(name=user,password=pwd).first()
        if user:
            # 登录成功
            # 保存登录用户状态信息
            request.session["user_id"]=user.pk

            # 录入权限session,将登录权限录入session表中
            initial_sesson(user,request)

            return redirect("/customer/list/")

    return render(request, 'web/login.html')

2，基于中间件和正则实现权限校验

middlewares.py:

from django.utils.deprecation import MiddlewareMixin
from django.shortcuts import HttpResponse,redirect
import re
class PermissionMiddleWare(MiddlewareMixin):

    def process_request(self,request):
        print("permission_list",request.session.get("permission_list"))
        current_path = request.path

        # 设置白名单放行
        for reg in ["/login/","/admin/*"]:
            ret=re.search(reg,current_path)
            if ret:
                return None
        # /customers/edit/1

        # 校验是否登录
        user_id=request.session.get("user_id")
        if not user_id:
            return redirect("/login/")

        # 校验权限
        permission_list = request.session.get("permission_list")

        for reg in permission_list:
             reg = "^%s$"%reg
             ret = re.search(reg,current_path)
             if ret:
                 return None

        return HttpResponse("无访问权限！")

diango录入权限，rbac

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