mirror of
https://github.com/GNS3/gns3-server.git
synced 2024-11-17 01:04:51 +02:00
223 lines
8.5 KiB
Python
223 lines
8.5 KiB
Python
# -*- coding: utf-8 -*-
|
|
#
|
|
# Copyright (C) 2013 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/>.
|
|
|
|
"""
|
|
Set up and run the server.
|
|
"""
|
|
|
|
import zmq
|
|
from zmq.eventloop import ioloop, zmqstream
|
|
ioloop.install()
|
|
|
|
import sys
|
|
import os
|
|
import tempfile
|
|
import signal
|
|
import errno
|
|
import functools
|
|
import socket
|
|
import tornado.ioloop
|
|
import tornado.web
|
|
import tornado.autoreload
|
|
from .config import Config
|
|
from .handlers.jsonrpc_websocket import JSONRPCWebSocket
|
|
from .handlers.version_handler import VersionHandler
|
|
from .handlers.file_upload_handler import FileUploadHandler
|
|
from .modules import MODULES
|
|
|
|
import logging
|
|
log = logging.getLogger(__name__)
|
|
|
|
|
|
class Server(object):
|
|
|
|
# built-in handlers
|
|
handlers = [(r"/version", VersionHandler),
|
|
(r"/upload", FileUploadHandler)]
|
|
|
|
def __init__(self, host, port, ipc=False):
|
|
|
|
self._host = host
|
|
self._port = port
|
|
if ipc:
|
|
self._zmq_port = 0 # this forces to use IPC for communications with the ZeroMQ server
|
|
else:
|
|
try:
|
|
# let the OS find an unused port for the ZeroMQ server
|
|
with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as sock:
|
|
sock.bind(('127.0.0.1', 0))
|
|
self._zmq_port = sock.getsockname()[1]
|
|
except socket.error as e:
|
|
log.warn("could not pick up a random port for the ZeroMQ server: {}".format(e))
|
|
self._zmq_port = port + 1 # let's try this server port + 1
|
|
self._ipc = ipc
|
|
self._modules = []
|
|
|
|
# get the projects and temp directories from the configuration file (passed to the modules)
|
|
config = Config.instance()
|
|
server_config = config.get_default_section()
|
|
# default projects directory is "~/Documents/GNS3/projects"
|
|
self._projects_dir = os.path.expandvars(os.path.expanduser(server_config.get("projects_directory", "~/Documents/GNS3/projects")))
|
|
self._temp_dir = server_config.get("temporary_directory", tempfile.gettempdir())
|
|
|
|
if not os.path.exists(self._projects_dir):
|
|
try:
|
|
os.makedirs(self._projects_dir)
|
|
log.info("projects directory '{}' created".format(self._projects_dir))
|
|
except EnvironmentError as e:
|
|
log.error("could not create the projects directory {}: {}".format(self._projects_dir, e))
|
|
|
|
def load_modules(self):
|
|
"""
|
|
Loads the modules.
|
|
"""
|
|
|
|
#=======================================================================
|
|
# cwd = os.path.dirname(os.path.abspath(__file__))
|
|
# module_path = os.path.join(cwd, 'modules')
|
|
# log.info("loading modules from {}".format(module_path))
|
|
# module_manager = ModuleManager([module_path])
|
|
# module_manager.load_modules()
|
|
# for module in module_manager.get_all_modules():
|
|
# instance = module_manager.activate_module(module,
|
|
# "127.0.0.1", # ZeroMQ server address
|
|
# self._zmq_port, # ZeroMQ server port
|
|
# projects_dir=self._projects_dir,
|
|
# temp_dir=self._temp_dir)
|
|
# if not instance:
|
|
# continue
|
|
# self._modules.append(instance)
|
|
# destinations = instance.destinations()
|
|
# for destination in destinations:
|
|
# JSONRPCWebSocket.register_destination(destination, module.name)
|
|
# instance.start() # starts the new process
|
|
#=======================================================================
|
|
|
|
# special built-in destination to stop the server
|
|
JSONRPCWebSocket.register_destination("builtin.stop", self._cleanup)
|
|
|
|
for module in MODULES:
|
|
instance = module(module.__name__.lower(),
|
|
"127.0.0.1", # ZeroMQ server address
|
|
self._zmq_port, # ZeroMQ server port
|
|
projects_dir=self._projects_dir,
|
|
temp_dir=self._temp_dir)
|
|
|
|
self._modules.append(instance)
|
|
destinations = instance.destinations()
|
|
for destination in destinations:
|
|
JSONRPCWebSocket.register_destination(destination, instance.name)
|
|
instance.start() # starts the new process
|
|
|
|
def run(self):
|
|
"""
|
|
Starts the Tornado web server and ZeroMQ server.
|
|
"""
|
|
|
|
router = self._create_zmq_router()
|
|
# Add our JSON-RPC Websocket handler to Tornado
|
|
self.handlers.extend([(r"/", JSONRPCWebSocket, dict(zmq_router=router))])
|
|
tornado_app = tornado.web.Application(self.handlers,
|
|
template_path=os.path.join(os.path.dirname(__file__), "templates"),
|
|
debug=True) # FIXME: debug mode!
|
|
try:
|
|
print("Starting server on {}:{}".format(self._host, self._port))
|
|
tornado_app.listen(self._port, address=self._host)
|
|
except socket.error as e:
|
|
if e.errno == errno.EADDRINUSE: # socket already in use
|
|
logging.critical("socket in use for port {}".format(self._port))
|
|
raise SystemExit
|
|
|
|
ioloop = tornado.ioloop.IOLoop.instance()
|
|
stream = zmqstream.ZMQStream(router, ioloop)
|
|
stream.on_recv_stream(JSONRPCWebSocket.dispatch_message)
|
|
tornado.autoreload.add_reload_hook(functools.partial(self._cleanup, stop=False))
|
|
|
|
def signal_handler(signum=None, frame=None):
|
|
log.warning("Server got signal {}, exiting...".format(signum))
|
|
self._cleanup()
|
|
|
|
signals = [signal.SIGTERM, signal.SIGINT]
|
|
if not sys.platform.startswith("win"):
|
|
signals.extend([signal.SIGHUP, signal.SIGQUIT])
|
|
else:
|
|
signals.extend([signal.SIGBREAK])
|
|
for sig in signals:
|
|
signal.signal(sig, signal_handler)
|
|
|
|
try:
|
|
ioloop.start()
|
|
except (KeyboardInterrupt, SystemExit):
|
|
print("\nExiting...")
|
|
self._cleanup()
|
|
|
|
def _create_zmq_router(self):
|
|
"""
|
|
Creates the ZeroMQ router socket to send
|
|
requests to modules.
|
|
|
|
:returns: ZeroMQ router socket
|
|
"""
|
|
|
|
context = zmq.Context()
|
|
context.linger = 0
|
|
router = context.socket(zmq.ROUTER)
|
|
if self._ipc:
|
|
try:
|
|
router.bind("ipc:///tmp/gns3.ipc")
|
|
except zmq.error.ZMQError as e:
|
|
log.critical("Could not start ZeroMQ server on ipc:///tmp/gns3.ipc, reason: {}".format(e))
|
|
self._cleanup()
|
|
raise SystemExit
|
|
log.info("ZeroMQ server listening to ipc:///tmp/gns3.ipc")
|
|
else:
|
|
try:
|
|
router.bind("tcp://127.0.0.1:{}".format(self._zmq_port))
|
|
except zmq.error.ZMQError as e:
|
|
log.critical("Could not start ZeroMQ server on 127.0.0.1:{}, reason: {}".format(self._zmq_port, e))
|
|
self._cleanup()
|
|
raise SystemExit
|
|
log.info("ZeroMQ server listening to 127.0.0.1:{}".format(self._zmq_port))
|
|
return router
|
|
|
|
def _cleanup(self, stop=True):
|
|
"""
|
|
Shutdowns any running module processes
|
|
and close remaining Tornado ioloop file descriptors
|
|
|
|
:param stop: stops the ioloop if True (default)
|
|
"""
|
|
|
|
# terminate all modules
|
|
for module in self._modules:
|
|
module.join(timeout=1)
|
|
if module.is_alive():
|
|
log.info("terminating {}".format(module.name))
|
|
module.terminate()
|
|
module.join(timeout=1)
|
|
|
|
ioloop = tornado.ioloop.IOLoop.instance()
|
|
# close any fd that would have remained open...
|
|
for fd in ioloop._handlers.keys():
|
|
try:
|
|
os.close(fd)
|
|
except Exception:
|
|
pass
|
|
|
|
if stop:
|
|
ioloop.stop()
|