如何用Python开发CMS系统的访问限制功能

from flask import Flask, request, Response

app = Flask(__name__)

# 用户数据库，存储用户名和密码
users = {
    "admin": "password123",
    "user": "password456"
}

# 登录路由
@app.route("/login", methods=["POST"])
def login():
    data = request.get_json()
    username = data["username"]
    password = data["password"]
    
    # 验证用户名和密码是否匹配
    if username in users and users[username] == password:
        return Response(status=200)
    else:
        return Response(status=401)

from functools import wraps
from flask import abort, request

def requires_permission(permission):
    def decorator(func):
        @wraps(func)
        def wrapper(*args, **kwargs):
            # 获取用户的权限
            user_permission = get_user_permission(request.cookies.get("token"))
            
            # 判断用户是否具有访问权限
            if user_permission < permission:
                abort(403)
            
            # 执行功能处理函数
            return func(*args, **kwargs)
        return wrapper
    return decorator

# 带有权限控制的功能处理函数
@app.route("/admin", methods=["GET"])
@requires_permission(2)  # 2表示管理员权限
def admin():
    return "Welcome, admin!"