# Copyright (C) 2014 Linaro Ltd.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# This program 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

"""
A very simple RequestHandler used as the default one for the Tornado
application.
"""

import tornado.web


class AppHandler(tornado.web.RequestHandler):
    """This handler is used to provide custom error messages.

    It is used to provide JSON response on errors, and the only implemented
    method is `write_error'.
    """

    def __init__(self, application, request, **kwargs):
        super(AppHandler, self).__init__(application, request, **kwargs)

    def write_error(self, status_code, **kwargs):
        self.set_status(404, 'Resource not found')
        self.write(dict(code=404, message='Resource not found'))
        self.finish()