Refactor authentication

[ipfire.org.git] / src / web / auth.py

#!/usr/bin/python

import logging
import tornado.web

from . import handlers_base as base

class AuthenticationMixin(object):
	def login(self, username, password):
		# Find account
		account = self.backend.accounts.find_account(username)
		if not account:
			raise tornado.web.HTTPError(401, "Unknown user: %s" % username)

		# Check credentials
		if not account.check_password(password):
			raise tornado.web.HTTPError(401, "Invalid password for %s" % account)

		# User has logged in, create a session
		session_id, session_expires = self.backend.accounts.create_session(
			account, self.request.host)

		# Check if a new session was created
		if not session_id:
			raise tornado.web.HTTPError(500, "Could not create session")

		# Send session cookie to the client
		self.set_cookie("session_id", session_id,
			domain=self.request.host, expires=session_expires)

	def logout(self):
		session_id = self.get_cookie("session_id")
		if not session_id:
			return

		success = self.backend.accounts.destroy_session(session_id, self.request.host)
		if success:
			self.clear_cookie("session_id")



class LoginHandler(AuthenticationMixin, base.BaseHandler):
	def get(self):
		next = self.get_argument("next", None)

		self.render("auth/login.html", next=next)

	def post(self):
		username = self.get_argument("username")
		password = self.get_argument("password")

		with self.db.transaction():
			self.login(username, password)

		# Determine the page we should redirect to
		next = self.get_argument("next", None)

		return self.redirect(next or "/")


class LogoutHandler(AuthenticationMixin, base.BaseHandler):
	def get(self):
		with self.db.transaction():
			self.logout()

		# Get back to the start page
		self.redirect("/")