#! /usr/bin/env python3
# -*- coding: utf-8 -*-
# Copyright 2013, 2017, Marten de Vries
#
# This file is part of OpenTeacher.
#
# OpenTeacher is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# OpenTeacher is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with OpenTeacher. If not, see <http://www.gnu.org/licenses/>.
class SafeHtmlCheckerModule:
def __init__(self, moduleManager, *args, **kwargs):
super().__init__(*args, **kwargs)
self._mm = moduleManager
self.type = "safeHtmlChecker"
self.requires = (
self._mm.mods(type="javaScriptEvaluator"),
)
def isSafeHtml(self, html):
"""Checks if it's safe to load an untrusted piece of ``html``
into a user's browser. Uses a tag whitelist.
"""
return self._js.global_["ot-safe-html-checker"](html)
def enable(self):
modules = next(iter(self._mm.mods(type="modules")))
self._js = modules.default(type="javaScriptEvaluator").loadModule('ot-safe-html-checker')
self.active = True
def disable(self):
self.active = False
del self._js
def init(moduleManager):
return SafeHtmlCheckerModule(moduleManager)