mirror of https://github.com/GNS3/gns3-server
# Conflicts: # .github/workflows/testing.yml # gns3server/compute/builtin/nodes/nat.py # gns3server/compute/qemu/__init__.py # gns3server/controller/link.py # gns3server/utils/asyncio/embed_shell.py # gns3server/utils/asyncio/raw_command_server.py # gns3server/utils/asyncio/telnet_server.py # gns3server/version.py # gns3server/web/web_server.pypull/1970/head
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# -*- 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
|
||||
# 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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"""
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Set up and run the server.
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"""
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import os
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import sys
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import signal
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import asyncio
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import aiohttp
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import aiohttp_cors
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import functools
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import time
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import atexit
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import weakref
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# Import encoding now, to avoid implicit import later.
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# Implicit import within threads may cause LookupError when standard library is in a ZIP
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import encodings.idna
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from .route import Route
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from ..config import Config
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from ..compute import MODULES
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from ..compute.port_manager import PortManager
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from ..compute.qemu import Qemu
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from ..controller import Controller
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# do not delete this import
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import gns3server.handlers
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import logging
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log = logging.getLogger(__name__)
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if not (aiohttp.__version__.startswith("3.")):
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raise RuntimeError("aiohttp 3.x is required to run the GNS3 server")
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class WebServer:
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def __init__(self, host, port):
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self._host = host
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self._port = port
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self._loop = None
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self._handler = None
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self._server = None
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self._app = None
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self._start_time = time.time()
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self._running = False
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self._closing = False
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self._ssl_context = None
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@staticmethod
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def instance(host=None, port=None):
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"""
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Singleton to return only one instance of Server.
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:returns: instance of Server
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"""
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if not hasattr(WebServer, "_instance") or WebServer._instance is None:
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assert host is not None
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assert port is not None
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WebServer._instance = WebServer(host, port)
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return WebServer._instance
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def _run_application(self, handler, ssl_context=None):
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try:
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srv = self._loop.create_server(handler, self._host, self._port, ssl=ssl_context)
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self._server, startup_res = self._loop.run_until_complete(asyncio.gather(srv, self._app.startup(), loop=self._loop))
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except (RuntimeError, OSError, asyncio.CancelledError) as e:
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log.critical("Could not start the server: {}".format(e))
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return False
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return True
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async def reload_server(self):
|
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"""
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Reload the server.
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"""
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await Controller.instance().reload()
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async def shutdown_server(self):
|
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"""
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Cleanly shutdown the server.
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"""
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if not self._closing:
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self._closing = True
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else:
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log.warning("Close is already in progress")
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return
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# close websocket connections
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websocket_connections = set(self._app['websockets'])
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if websocket_connections:
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log.info("Closing {} websocket connections...".format(len(websocket_connections)))
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for ws in websocket_connections:
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await ws.close(code=aiohttp.WSCloseCode.GOING_AWAY, message='Server shutdown')
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if self._server:
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self._server.close()
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await self._server.wait_closed()
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if self._app:
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await self._app.shutdown()
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if self._handler:
|
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await self._handler.shutdown(2) # Parameter is timeout
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if self._app:
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await self._app.cleanup()
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await Controller.instance().stop()
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for module in MODULES:
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log.debug("Unloading module {}".format(module.__name__))
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m = module.instance()
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await m.unload()
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if PortManager.instance().tcp_ports:
|
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log.warning("TCP ports are still used {}".format(PortManager.instance().tcp_ports))
|
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if PortManager.instance().udp_ports:
|
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log.warning("UDP ports are still used {}".format(PortManager.instance().udp_ports))
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try:
|
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tasks = asyncio.all_tasks()
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except AttributeError:
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tasks = asyncio.Task.all_tasks()
|
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|
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for task in tasks:
|
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task.cancel()
|
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try:
|
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await asyncio.wait_for(task, 1)
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except BaseException:
|
||||
pass
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self._loop.stop()
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def ssl_context(self):
|
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"""
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Returns the SSL context for the server.
|
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"""
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return self._ssl_context
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def _signal_handling(self):
|
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|
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def signal_handler(signame, *args):
|
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try:
|
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if signame == "SIGHUP":
|
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log.info("Server has got signal {}, reloading...".format(signame))
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asyncio.ensure_future(self.reload_server())
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else:
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log.warning("Server has got signal {}, exiting...".format(signame))
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asyncio.ensure_future(self.shutdown_server())
|
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except asyncio.CancelledError:
|
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pass
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signals = ["SIGTERM", "SIGINT"]
|
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if sys.platform.startswith("win"):
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signals.extend(["SIGBREAK"])
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else:
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signals.extend(["SIGHUP", "SIGQUIT"])
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for signal_name in signals:
|
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callback = functools.partial(signal_handler, signal_name)
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if sys.platform.startswith("win"):
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# add_signal_handler() is not yet supported on Windows
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signal.signal(getattr(signal, signal_name), callback)
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else:
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self._loop.add_signal_handler(getattr(signal, signal_name), callback)
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def _create_ssl_context(self, server_config):
|
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import ssl
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ssl_context = ssl.SSLContext(ssl.PROTOCOL_SSLv23)
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certfile = server_config["certfile"]
|
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certkey = server_config["certkey"]
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try:
|
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ssl_context.load_cert_chain(certfile, certkey)
|
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except FileNotFoundError:
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log.critical("Could not find the SSL certfile or certkey")
|
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raise SystemExit
|
||||
except ssl.SSLError as e:
|
||||
log.critical("SSL error: {}".format(e))
|
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raise SystemExit
|
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log.info("SSL is enabled")
|
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return ssl_context
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||||
async def start_shell(self):
|
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|
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log.error("The embedded shell has been deactivated in this version of GNS3")
|
||||
return
|
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try:
|
||||
from ptpython.repl import embed
|
||||
except ImportError:
|
||||
log.error("Unable to start a shell: the ptpython module must be installed!")
|
||||
return
|
||||
await embed(globals(), locals(), return_asyncio_coroutine=True, patch_stdout=True, history_filename=".gns3_shell_history")
|
||||
|
||||
def _exit_handling(self):
|
||||
"""
|
||||
Makes sure the asyncio loop is closed.
|
||||
"""
|
||||
|
||||
def close_asyncio_loop():
|
||||
loop = None
|
||||
try:
|
||||
loop = asyncio.get_event_loop()
|
||||
except AttributeError:
|
||||
pass
|
||||
if loop is not None:
|
||||
loop.close()
|
||||
|
||||
atexit.register(close_asyncio_loop)
|
||||
|
||||
async def _on_startup(self, *args):
|
||||
"""
|
||||
Called when the HTTP server start
|
||||
"""
|
||||
|
||||
await Controller.instance().start()
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||||
# Because with a large image collection
|
||||
# without md5sum already computed we start the
|
||||
# computing with server start
|
||||
asyncio.ensure_future(Qemu.instance().list_images())
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||||
|
||||
def run(self):
|
||||
"""
|
||||
Starts the server.
|
||||
"""
|
||||
|
||||
server_logger = logging.getLogger('aiohttp.server')
|
||||
# In debug mode we don't use the standard request log but a more complete in response.py
|
||||
if log.getEffectiveLevel() == logging.DEBUG:
|
||||
server_logger.setLevel(logging.CRITICAL)
|
||||
|
||||
logger = logging.getLogger("asyncio")
|
||||
logger.setLevel(logging.ERROR)
|
||||
|
||||
if sys.platform.startswith("win"):
|
||||
loop = asyncio.get_event_loop()
|
||||
# Add a periodic callback to give a chance to process signals on Windows
|
||||
# because asyncio.add_signal_handler() is not supported yet on that platform
|
||||
# otherwise the loop runs outside of signal module's ability to trap signals.
|
||||
|
||||
def wakeup():
|
||||
loop.call_later(0.5, wakeup)
|
||||
loop.call_later(0.5, wakeup)
|
||||
|
||||
server_config = Config.instance().get_section_config("Server")
|
||||
|
||||
self._ssl_context = None
|
||||
if server_config.getboolean("ssl"):
|
||||
if sys.platform.startswith("win"):
|
||||
log.critical("SSL mode is not supported on Windows")
|
||||
raise SystemExit
|
||||
self._ssl_context = self._create_ssl_context(server_config)
|
||||
|
||||
self._loop = asyncio.get_event_loop()
|
||||
|
||||
if log.getEffectiveLevel() == logging.DEBUG:
|
||||
# On debug version we enable info that
|
||||
# coroutine is not called in a way await/await
|
||||
self._loop.set_debug(True)
|
||||
|
||||
for key, val in os.environ.items():
|
||||
log.debug("ENV %s=%s", key, val)
|
||||
|
||||
self._app = aiohttp.web.Application()
|
||||
|
||||
# Keep a list of active websocket connections
|
||||
self._app['websockets'] = weakref.WeakSet()
|
||||
|
||||
# Background task started with the server
|
||||
self._app.on_startup.append(self._on_startup)
|
||||
|
||||
resource_options = aiohttp_cors.ResourceOptions(expose_headers="*", allow_headers="*", max_age=0)
|
||||
|
||||
# Allow CORS for this domains
|
||||
cors = aiohttp_cors.setup(self._app, defaults={
|
||||
# Default web server for web gui dev
|
||||
"http://127.0.0.1:8080": resource_options,
|
||||
"http://localhost:8080": resource_options,
|
||||
"http://127.0.0.1:4200": resource_options,
|
||||
"http://localhost:4200": resource_options,
|
||||
"http://gns3.github.io": resource_options,
|
||||
"https://gns3.github.io": resource_options
|
||||
})
|
||||
|
||||
PortManager.instance().console_host = self._host
|
||||
|
||||
for method, route, handler in Route.get_routes():
|
||||
log.debug("Adding route: {} {}".format(method, route))
|
||||
cors.add(self._app.router.add_route(method, route, handler))
|
||||
|
||||
for module in MODULES:
|
||||
log.debug("Loading module {}".format(module.__name__))
|
||||
m = module.instance()
|
||||
m.port_manager = PortManager.instance()
|
||||
|
||||
log.info("Starting server on {}:{}".format(self._host, self._port))
|
||||
|
||||
self._handler = self._app.make_handler()
|
||||
if self._run_application(self._handler, self._ssl_context) is False:
|
||||
self._loop.stop()
|
||||
sys.exit(1)
|
||||
|
||||
self._signal_handling()
|
||||
self._exit_handling()
|
||||
|
||||
if server_config.getboolean("shell"):
|
||||
asyncio.ensure_future(self.start_shell())
|
||||
|
||||
try:
|
||||
self._loop.run_forever()
|
||||
except TypeError as e:
|
||||
# This is to ignore an asyncio.windows_events exception
|
||||
# on Windows when the process gets the SIGBREAK signal
|
||||
# TypeError: async() takes 1 positional argument but 3 were given
|
||||
log.warning("TypeError exception in the loop {}".format(e))
|
||||
finally:
|
||||
if self._loop.is_running():
|
||||
try:
|
||||
self._loop.run_until_complete(self.shutdown_server())
|
||||
except asyncio.CancelledError:
|
||||
pass
|
||||
|
Loading…
Reference in new issue