Tornado 用戶身份驗證框架

一、安全cookie機制html

import tornado.web

session_id = 1
class MainHandler(tornado.web.RequestHandler):

    def get(self):
     global session_id 
if not self.get_cookie('session'): self.set_cookie('session',str(session_id)) session_id = session_id + 1 self.write('你設置了一個新的session') else: self.write('你已經獲取了session')

爲了防止客戶端篡改,隨意解析cookie的鍵值web

import tornado.web
import tornado.ioloop
session_id = 1
class MainHandler(tornado.web.RequestHandler):
    def get(self):
        global session_id
        if not self.get_secure_cookie('session'):
            self.set_secure_cookie('session',str(session_id))
            session_id = session_id+1
            self.write('你設置了一個新的session')
        else:
            self.write('你已經獲取了session')
application = tornado.web.Application([(r'/',MainHandler),],cookie_secret = 'mimi') # 設置密鑰

def main():
    application.listen(8888)
    tornado.ioloop.IOLoop.current().start()

if __name__ =='__main__':
    main()

二、用戶身份認證flask

tornado和flask同樣,在requestHandler中current_user保存當前請求用戶名,但默認值時空,須要用requestHandler.get_current_user屬性設置該屬性安全

import tornado.web
import tornado.ioloop
import uuid  # uuid生成庫

dict_sessions = {}  # 保存全部登錄的session

class BaseHandler(tornado.web.RequestHandler):
    def get_current_user(self):  # 寫入current_user函數
        session_id = self.get_secure_cookie('session')
        return dict_sessions.get(session_id)

class MainHandler(BaseHandler):
    @tornado.web.authenticated  # 須要身份認證才能訪問的處理器
    def get(self):
        name = tornado.escape.xhtml_escape(self.current_user)  # 自動轉義
        self.write('hello' + name)

class LoginHandler(BaseHandler):
    def get(self):
        self.write(
            '<html><body><form action="/login" method = "post">Name:<input type = "text" name = "name">:<input type = "submit" value = "sign in"></form></body></html>')

    def post(self):
        if len(self.get_argument('name')) < 3:
            self.redirect('/login')
        session_id = str(uuid.uuid1())
        dict_sessions[session_id] = self.get_argument('name')
        self.set_secure_cookie('session_id', session_id)
        self.redirect('/')

application = tornado.web.Application([(r'/', MainHandler), (r'/login', LoginHandler), ], cookie_secret='mimi',
                                      login_url='/login')

def main():
    application.listen(8888)
    tornado.ioloop.IOLoop.current().start()

if __name__ == '__main__':
    main()

 防止跨站攻擊cookie

一、在實例化tornado.web.Application傳入xsrf_cookies=True參數session

application = tornado.web.Application([(r'/', MainHandler), (r'/login', LoginHandler), ], cookie_secret='mimi',
                                      login_url='/login',xsrf_cookies=True)

 

二、在每一個HTML表單模板文件中爲全部表單添加xsrf_form_html()函數標籤app

<form action="/login" method="post">
    {% module xsrf_form_html() %}
    <input type="text" name="message">
    <input type="submit" value="post">
</form>
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