inheritance.py

import tornado.ioloop
import tornado.web
import tornado.autoreload


class LoginHandler(tornado.web.RequestHandler):
    def post(self):
        userid = self.get_argument('userid')
        password = self.get_argument('password')
        if (userid == password):
            self.set_cookie('login', userid)
            self.redirect("/profile")
        else:
            self.redirect("/")


class LogoutHandler(tornado.web.RequestHandler):
    def get(self):
        self.clear_cookie('login')
        self.redirect("/")


class ProfileHandler(tornado.web.RequestHandler):
    def prepare(self):
        self.userid = self.get_cookie('login')
        if self.userid is None:
            self.redirect("/")

    def get(self):
        self.write("you are logged in as: " + self.userid)


class DashboardHandler(ProfileHandler):
    def get(self):
        self.write("this is your dashboard: " + self.userid)


class SuperSecretHandler(ProfileHandler):
    def get(self):
        self.write("Super Secret. " + self.userid + " eyes only!!")


application = tornado.web.Application(
    [
        (r"/login", LoginHandler),
        (r"/logout", LogoutHandler),
        (r"/profile", ProfileHandler),
        (r"/dashboard", DashboardHandler),
        (r"/secret", SuperSecretHandler),
        (r"/(.*)", tornado.web.StaticFileHandler,
         {"path": "static", "default_filename": "index.html"})
    ], debug=True
)


if __name__ == "__main__":
    application.listen(8888)
    io_loop = tornado.ioloop.IOLoop.instance()
    tornado.autoreload.start(io_loop)
    io_loop.start()