gns3-server/gns3server/handlers/api/compute/notification_handler.py

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# -*- coding: utf-8 -*-
#
# Copyright (C) 2015 GNS3 Technologies Inc.
#
# This program 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.
#
# 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import asyncio
from aiohttp.web import WebSocketResponse
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from gns3server.web.route import Route
from gns3server.compute.notification_manager import NotificationManager
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class NotificationHandler:
@Route.get(
r"/notifications/ws",
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description="Send notifications using Websockets")
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def notifications(request, response):
notifications = NotificationManager.instance()
ws = WebSocketResponse()
yield from ws.prepare(request)
with notifications.queue() as queue:
while True:
try:
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notification = yield from queue.get_json(5)
except asyncio.futures.CancelledError:
break
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ws.send_str(notification)
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return ws