python USES tornado to log in and log out

2020-11-20 06:09:54
OfStack

This article shares the specific code of tornado implementation login and logout for your reference, the specific content is as follows

main. py as follows:


import tornado.httpserver
import tornado.ioloop
import tornado.web
import tornado.options
import os.path
 
from tornado.options import define, options
define("port", default=8000, help="run on the given port", type=int)
 
class BaseHandler(tornado.web.RequestHandler):
  def get_current_user(self):
    return self.get_secure_cookie("username")
class LoginHandler(BaseHandler):
  def get(self):
    self.render('login.html')
  def post(self):
    self.set_secure_cookie("username", self.get_argument("username"))
    self.redirect("/")
class WelcomeHandler(BaseHandler):
  @tornado.web.authenticated
  def get(self):
    self.render('index.html', user=self.current_user)
 
class LogoutHandler(BaseHandler):
  def post(self):
    if (self.get_argument("logout", None)):
      self.clear_cookie("username")
    self.redirect("/")
if __name__ == "__main__":
  tornado.options.parse_command_line()
  settings = {
    "template_path": os.path.join(os.path.dirname(__file__), "templates"),
    "cookie_secret": "bZJc2sWbQLKos6GkHn/VB9oXwQt8S0R0kRvJ5/xJ89E=",
    "login_url": "/login"
  }
  application = tornado.web.Application([
    (r'/', WelcomeHandler),
    (r'/login', LoginHandler),
    (r'/logout', LogoutHandler)
  ],debug= True,**settings)
  http_server = tornado.httpserver.HTTPServer(application)
  http_server.listen(options.port)
  tornado.ioloop.IOLoop.instance().start()

index.html


<html>
<head>
</head>
<body>
 <p>Hello {{ user }}</p>
 <form action="/logout?logout=1" method="post">
 <input type="submit" value="Log out"></br>
</body>
</html>


<html>
<head>
</head>
<body>
 <h>Login Page</h>
 <form action="/login" method="post">Name:<input type="text" name="username"></br>
 <input type="submit" value="Sign in"></br>
 </form>
</body>
</html>