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# Copyright (c) 2016 Weitian LI <liweitianux@live.com>
# MIT license
"""
Login handler
Currently, the login is simply authenticated by a plain password.
"""
from tornado.options import define, options
from tornado.escape import xhtml_escape
from .base import BaseRequestHandler
# Each module defines its own options, which are added to the global namespace
define("password", type=str,
help=("Password authentication to access the Web UI. "
"If not specified, then all accesses are allowed."))
class LoginHandler(BaseRequestHandler):
"""
Login page handler of the Web UI.
NOTE
----
Only check the password to authenticate the access, therefore, the
default username "FG21SIM" is used.
"""
def get(self):
if (options.password is None) or (options.password == ""):
# Password is not set, just allow
self.redirect(self.reverse_url("index"))
elif self.current_user:
# Already authenticated
self.redirect(self.reverse_url("index"))
else:
self.render("login.html", error="")
def post(self):
password = xhtml_escape(self.get_argument("password"))
if password == options.password:
self.set_secure_cookie("user", "FG21SIM")
self.redirect(self.reverse_url("index"))
else:
# Password incorrect
self.render("login.html", error="Incorrect password!")
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