Tornado login Examples/Tutorials [closed]

Question

I was wondering if anyone know of any example code or tutorials on implementing a login/signup page in Tornado? Ive seen the examples that come with it, but they seem very facebook/oauth centric.

Answer 1

Here's a simple example handler, which needs a login.html template containing a username/password form. I don't have a sign up example, but it's quite similar, on the post you validate the input and insert the user record rather than authenticating.

class BaseHandler(tornado.web.RequestHandler):

    def get_login_url(self):
        return u"/login"

    def get_current_user(self):
        user_json = self.get_secure_cookie("user")
        if user_json:
            return tornado.escape.json_decode(user_json)
        else:
            return None

class LoginHandler(BaseHandler):

    def get(self):
        self.render("login.html", next=self.get_argument("next","/"))

    def post(self):
        username = self.get_argument("username", "")
        password = self.get_argument("password", "")
        # The authenticate method should match a username and password
        # to a username and password hash in the database users table.
        # Implementation left as an exercise for the reader.
        auth = self.db.authenticate(username, password)
        if auth:
            self.set_current_user(username)
            self.redirect(self.get_argument("next", u"/"))
        else:
            error_msg = u"?error=" + tornado.escape.url_escape("Login incorrect.")
            self.redirect(u"/login" + error_msg)

    def set_current_user(self, user):
        if user:
            self.set_secure_cookie("user", tornado.escape.json_encode(user))
        else:
            self.clear_cookie("user")

class LogoutHandler(BaseHandler):

    def get(self):
        self.clear_cookie("user")
        self.redirect(u"/login)