python---cookie模擬登錄和模擬session原理

cookie模擬登錄：

import tornado.web

class IndexHandler(tornado.web.RequestHandler):
    def get(self):
        #self.write("Hello world")
        # 展現全部的cookie
        # print(self.cookies)
        # print(self.get_cookie('k1'))
        # self.set_cookie('k1','999')#還有 過時時間 適用路徑
        # self.render("index.html")
        if self.get_argument('u',None) in ['asd','zxc']:
            self.set_secure_cookie('user',self.get_argument('u'))
        else:
            self.write('請登陸')

class ManagerHandler(tornado.web.RequestHandler):
    def get(self, *args, **kwargs):
        #默認self.get_secure_cookie('user',None)獲取的數據是bytes類型
        if str(self.get_secure_cookie('user',None),encoding="utf8") in ['asd','zxc']:
            self.write("歡迎登陸："+str(self.get_secure_cookie('user'),encoding="utf8"))
        else:
            self.redirect('/index')

settings ={
    'template_path':'views',
    'static_path':'statics',
    'cookie_secret':'dafawafawfaw',
}

application = tornado.web.Application([
    (r"/index",IndexHandler),
    (r"/manager",ManagerHandler),
],**settings)


if __name__=="__main__":
    application.listen(8080)
    tornado.ioloop.IOLoop.instance().start()

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session原理模擬（放在內存），更可能是放在Redis，文件，數據庫中

import tornado.web

#放在內存 redis  文件  數據庫
container={}

class IndexHandler(tornado.web.RequestHandler):
    def get(self):
        if self.get_argument('u',None) in ['asd','zxc']:
            import hashlib
            import time
            obj = hashlib.md5()
            obj.update(bytes(str(time.time()),encoding="utf8"))
            random_str = obj.hexdigest()
            #這一段隨機字符串須要傳入到客戶端cookie中，以便用戶到服務端對應
            container[random_str]={}
            container[random_str]['k1']=123
            container[random_str]['k2']=self.get_argument('u')+"parents"
            container[random_str]['is_login']=True

            self.set_cookie('py_session',random_str)
        else:
            self.write("請登陸")

class ManagerHandler(tornado.web.RequestHandler):
    def get(self, *args, **kwargs):
        random_str = self.get_cookie('py_session', None)
        if random_str:
            if container.get(random_str,None):
                if container[random_str]['is_login']:  # 或者container.get(random_str,None)
                    self.write("歡迎登陸" + container[random_str]['k2'])
                    return;
        self.redirect("/index")


settings ={
    'template_path':'views',
    'static_path':'statics',
    'cookie_secret':'dafawafawfaw',
}

application = tornado.web.Application([
    (r"/index",IndexHandler),
    (r"/manager",ManagerHandler),
],**settings)


if __name__=="__main__":
    application.listen(8080)
    tornado.ioloop.IOLoop.instance().start()

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