mirror of https://github.com/GNS3/gns3-server
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86 lines
2.7 KiB
86 lines
2.7 KiB
# -*- coding: utf-8 -*-
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#
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# Copyright (C) 2015 GNS3 Technologies Inc.
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import asyncio
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import aiohttp
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from aiohttp.web import WebSocketResponse
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from gns3server.web.route import Route
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from gns3server.controller import Controller
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async def process_websocket(ws):
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"""
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Process ping / pong and close message
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"""
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try:
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await ws.receive()
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except aiohttp.WSServerHandshakeError:
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pass
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class NotificationHandler:
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@Route.get(
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r"/notifications",
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description="Receive notifications about the controller",
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status_codes={
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200: "End of stream"
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})
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async def notification(request, response):
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controller = Controller.instance()
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response.content_type = "application/json"
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response.set_status(200)
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response.enable_chunked_encoding()
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await response.prepare(request)
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with controller.notification.controller_queue() as queue:
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while True:
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try:
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msg = await queue.get_json(5)
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response.write(("{}\n".format(msg)).encode("utf-8"))
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except asyncio.futures.CancelledError:
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break
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await response.drain()
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@Route.get(
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r"/notifications/ws",
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description="Receive notifications about controller from a Websocket",
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status_codes={
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200: "End of stream"
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})
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async def notification_ws(request, response):
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controller = Controller.instance()
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ws = aiohttp.web.WebSocketResponse()
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await ws.prepare(request)
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request.app['websockets'].add(ws)
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asyncio.ensure_future(process_websocket(ws))
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with controller.notification.controller_queue() as queue:
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while True:
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try:
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notification = await queue.get_json(5)
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if ws.closed:
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break
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await ws.send_str(notification)
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except asyncio.futures.CancelledError:
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break
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finally:
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request.app['websockets'].discard(ws)
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return ws
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