# This file is part of Propagator, a KDE Sysadmin Project
#
#   Copyright (C) 2015-2016 Boudhayan Gupta <bgupta@kde.org>
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
# 3. Neither the name of KDE e.V. (or its successor approved by the
#    membership of KDE e.V.) nor the names of its contributors may be used
#    to endorse or promote products derived from this software without
#    specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

import sys

import tornado.iostream
import tornado.tcpserver
import tornado.gen

from CommandProtocol import ParseCommand, ExecuteCommand
from CommandProtocol import PropagatorProtocolException

class CommandServer(tornado.tcpserver.TCPServer):

    @tornado.gen.coroutine
    def handle_stream(self, stream, address):
        data = yield stream.read_until_close()
        try:
            context = ParseCommand(data.decode().strip())
        except PropagatorProtocolException as exc:
            sys.stderr.write(exc.logline())
            return
        ExecuteCommand(context)

# This file is part of Propagator, a KDE Sysadmin Project
#
#   Copyright (C) 2015-2016 Boudhayan Gupta <bgupta@kde.org>
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
# 3. Neither the name of KDE e.V. (or its successor approved by the
#    membership of KDE e.V.) nor the names of its contributors may be used
#    to endorse or promote products derived from this software without
#    specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

import sys

import tornado.tcpserver
import tornado.gen

from CommandProtocol import ParseCommand, ExecuteCommand
from CommandProtocol import PropagatorProtocolException

class CommandServer(tornado.tcpserver.TCPServer):

    @tornado.gen.coroutine
    def handle_stream(self, stream, address):
        data = yield stream.read_until_close()
        try:
            context = ParseCommand(data.decode().strip())
        except PropagatorProtocolException as exc:
            sys.stderr.write(exc.logline())
            return
        ExecuteCommand(context)

Remove unneeded import