pythonweb提高代码复用的三种方案(目前已知)

冷不防 2022-05-14 01:08 128阅读 0赞

这三种方法都可以应用于设置权限

方法一：封装成装饰器(推荐) 实际应用：运行时间、加载权重
    from App.models import User
    
    
    def login_required(fun):
        def wrap(*args, **kwargs):
            u_token = request.args.get("u_token")
    
            users = User.query.filter(User.u_token == u_token).all()
    
            if not users:
                abort(401, message="用户身份失效")
    
            user = users[0]
    
            g.user = user
    
            return fun(*args, **kwargs)
    
        return wrap
    
    
    def require_permission(permission):
        def login_required(fun):
            def wrap(*args, **kwargs):
                u_token = request.args.get("u_token")
    
                users = User.query.filter(User.u_token == u_token).all()
    
                if not users:
                    abort(401, message="用户身份失效")
    
                user = users[0]
    
                if not user.check_permission(permission):
                    abort(403, message="你无权限操作此模块，请联系管理员")
    
                g.user = user
    
                return fun(*args, **kwargs)
    
            return wrap
    
        return login_required
    
    
    "***********************不同的文件***************************"
    from flask import request, g
    from flask_restful import Resource
    
    from App.apis.user_dectorator import login_required
    from App.models import User
    
    
    class BlogsResource(Resource):
    
        @login_required
        def post(self):
    
            user = g.user
    
            return {
       "msg": "哈哈%s" % user.u_name}

方法二：通过继承实现
    from flask import request, g
    from flask_restful import Resource, abort
    
    from App.models import User
    
    
    class BaseResource(Resource):
    
        def check_login(self):
            u_token = request.args.get("u_token")
    
            users = User.query.filter(User.u_token == u_token).all()
    
            if not users:
                abort(401, message="用户身份失效")
    
            user = users[0]
    
            g.user = user
    
    "***********************不同的文件***************************"
    
    
    from App.apis.base_login_api import BaseResource
    
    
    class CommentResource(BaseResource):
    
        def post(self):
    
            self.check_login()
    
            return {
       "msg": "评论成功"}

方法三：钩子函数(中间件-AOP) 在request响应之前做操作(普通用户、VIP用户)
    from flask import request, g
    from flask_restful import abort
    
    from App.models import User
    
    PATH_LIST = ["/goods/"]
    
    PERMISSION_BUY_LIST = []
    
    
    def load_middleware(app):
    
        @app.before_request
        def before():
    
            path = request.path
    
            if path in PATH_LIST:
                u_token = request.args.get("u_token")
    
                users = User.query.filter(User.u_token == u_token).all()
    
                if not users:
                    abort(401, message="用户身份失效")
    
                user = users[0]