347 lines
13 KiB
Python
347 lines
13 KiB
Python
""" A minimal application base mixin for all ZMQ based IPython frontends.
|
|
|
|
This is not a complete console app, as subprocess will not be able to receive
|
|
input, there is no real readline support, among other limitations. This is a
|
|
refactoring of what used to be the IPython/qt/console/qtconsoleapp.py
|
|
"""
|
|
# Copyright (c) Jupyter Development Team.
|
|
# Distributed under the terms of the Modified BSD License.
|
|
|
|
import atexit
|
|
import os
|
|
import signal
|
|
import sys
|
|
import uuid
|
|
import warnings
|
|
|
|
|
|
from traitlets.config.application import boolean_flag
|
|
from ipython_genutils.path import filefind
|
|
from traitlets import (
|
|
Dict, List, Unicode, CUnicode, CBool, Any, Type
|
|
)
|
|
|
|
from jupyter_core.application import base_flags, base_aliases
|
|
|
|
from .blocking import BlockingKernelClient
|
|
from .restarter import KernelRestarter
|
|
from . import KernelManager, tunnel_to_kernel, find_connection_file, connect
|
|
from .kernelspec import NoSuchKernel
|
|
from .session import Session
|
|
|
|
ConnectionFileMixin = connect.ConnectionFileMixin
|
|
|
|
from .localinterfaces import localhost
|
|
|
|
#-----------------------------------------------------------------------------
|
|
# Aliases and Flags
|
|
#-----------------------------------------------------------------------------
|
|
|
|
flags = {}
|
|
flags.update(base_flags)
|
|
# the flags that are specific to the frontend
|
|
# these must be scrubbed before being passed to the kernel,
|
|
# or it will raise an error on unrecognized flags
|
|
app_flags = {
|
|
'existing' : ({'JupyterConsoleApp' : {'existing' : 'kernel*.json'}},
|
|
"Connect to an existing kernel. If no argument specified, guess most recent"),
|
|
}
|
|
app_flags.update(boolean_flag(
|
|
'confirm-exit', 'JupyterConsoleApp.confirm_exit',
|
|
"""Set to display confirmation dialog on exit. You can always use 'exit' or
|
|
'quit', to force a direct exit without any confirmation. This can also
|
|
be set in the config file by setting
|
|
`c.JupyterConsoleApp.confirm_exit`.
|
|
""",
|
|
"""Don't prompt the user when exiting. This will terminate the kernel
|
|
if it is owned by the frontend, and leave it alive if it is external.
|
|
This can also be set in the config file by setting
|
|
`c.JupyterConsoleApp.confirm_exit`.
|
|
"""
|
|
))
|
|
flags.update(app_flags)
|
|
|
|
aliases = {}
|
|
aliases.update(base_aliases)
|
|
|
|
# also scrub aliases from the frontend
|
|
app_aliases = dict(
|
|
ip = 'JupyterConsoleApp.ip',
|
|
transport = 'JupyterConsoleApp.transport',
|
|
hb = 'JupyterConsoleApp.hb_port',
|
|
shell = 'JupyterConsoleApp.shell_port',
|
|
iopub = 'JupyterConsoleApp.iopub_port',
|
|
stdin = 'JupyterConsoleApp.stdin_port',
|
|
control = 'JupyterConsoleApp.control_port',
|
|
existing = 'JupyterConsoleApp.existing',
|
|
f = 'JupyterConsoleApp.connection_file',
|
|
|
|
kernel = 'JupyterConsoleApp.kernel_name',
|
|
|
|
ssh = 'JupyterConsoleApp.sshserver',
|
|
)
|
|
aliases.update(app_aliases)
|
|
|
|
#-----------------------------------------------------------------------------
|
|
# Classes
|
|
#-----------------------------------------------------------------------------
|
|
|
|
classes = [KernelManager, KernelRestarter, Session]
|
|
|
|
class JupyterConsoleApp(ConnectionFileMixin):
|
|
name = 'jupyter-console-mixin'
|
|
|
|
description = """
|
|
The Jupyter Console Mixin.
|
|
|
|
This class contains the common portions of console client (QtConsole,
|
|
ZMQ-based terminal console, etc). It is not a full console, in that
|
|
launched terminal subprocesses will not be able to accept input.
|
|
|
|
The Console using this mixing supports various extra features beyond
|
|
the single-process Terminal IPython shell, such as connecting to
|
|
existing kernel, via:
|
|
|
|
jupyter console <appname> --existing
|
|
|
|
as well as tunnel via SSH
|
|
|
|
"""
|
|
|
|
classes = classes
|
|
flags = Dict(flags)
|
|
aliases = Dict(aliases)
|
|
kernel_manager_class = Type(
|
|
default_value=KernelManager,
|
|
config=True,
|
|
help='The kernel manager class to use.'
|
|
)
|
|
kernel_client_class = BlockingKernelClient
|
|
|
|
kernel_argv = List(Unicode())
|
|
|
|
# connection info:
|
|
|
|
sshserver = Unicode('', config=True,
|
|
help="""The SSH server to use to connect to the kernel.""")
|
|
sshkey = Unicode('', config=True,
|
|
help="""Path to the ssh key to use for logging in to the ssh server.""")
|
|
|
|
def _connection_file_default(self):
|
|
return 'kernel-%i.json' % os.getpid()
|
|
|
|
existing = CUnicode('', config=True,
|
|
help="""Connect to an already running kernel""")
|
|
|
|
kernel_name = Unicode('python', config=True,
|
|
help="""The name of the default kernel to start.""")
|
|
|
|
confirm_exit = CBool(True, config=True,
|
|
help="""
|
|
Set to display confirmation dialog on exit. You can always use 'exit' or 'quit',
|
|
to force a direct exit without any confirmation.""",
|
|
)
|
|
|
|
def build_kernel_argv(self, argv=None):
|
|
"""build argv to be passed to kernel subprocess
|
|
|
|
Override in subclasses if any args should be passed to the kernel
|
|
"""
|
|
self.kernel_argv = self.extra_args
|
|
|
|
def init_connection_file(self):
|
|
"""find the connection file, and load the info if found.
|
|
|
|
The current working directory and the current profile's security
|
|
directory will be searched for the file if it is not given by
|
|
absolute path.
|
|
|
|
When attempting to connect to an existing kernel and the `--existing`
|
|
argument does not match an existing file, it will be interpreted as a
|
|
fileglob, and the matching file in the current profile's security dir
|
|
with the latest access time will be used.
|
|
|
|
After this method is called, self.connection_file contains the *full path*
|
|
to the connection file, never just its name.
|
|
"""
|
|
if self.existing:
|
|
try:
|
|
cf = find_connection_file(self.existing, ['.', self.runtime_dir])
|
|
except Exception:
|
|
self.log.critical("Could not find existing kernel connection file %s", self.existing)
|
|
self.exit(1)
|
|
self.log.debug("Connecting to existing kernel: %s" % cf)
|
|
self.connection_file = cf
|
|
else:
|
|
# not existing, check if we are going to write the file
|
|
# and ensure that self.connection_file is a full path, not just the shortname
|
|
try:
|
|
cf = find_connection_file(self.connection_file, [self.runtime_dir])
|
|
except Exception:
|
|
# file might not exist
|
|
if self.connection_file == os.path.basename(self.connection_file):
|
|
# just shortname, put it in security dir
|
|
cf = os.path.join(self.runtime_dir, self.connection_file)
|
|
else:
|
|
cf = self.connection_file
|
|
self.connection_file = cf
|
|
try:
|
|
self.connection_file = filefind(self.connection_file, ['.', self.runtime_dir])
|
|
except IOError:
|
|
self.log.debug("Connection File not found: %s", self.connection_file)
|
|
return
|
|
|
|
# should load_connection_file only be used for existing?
|
|
# as it is now, this allows reusing ports if an existing
|
|
# file is requested
|
|
try:
|
|
self.load_connection_file()
|
|
except Exception:
|
|
self.log.error("Failed to load connection file: %r", self.connection_file, exc_info=True)
|
|
self.exit(1)
|
|
|
|
def init_ssh(self):
|
|
"""set up ssh tunnels, if needed."""
|
|
if not self.existing or (not self.sshserver and not self.sshkey):
|
|
return
|
|
self.load_connection_file()
|
|
|
|
transport = self.transport
|
|
ip = self.ip
|
|
|
|
if transport != 'tcp':
|
|
self.log.error("Can only use ssh tunnels with TCP sockets, not %s", transport)
|
|
sys.exit(-1)
|
|
|
|
if self.sshkey and not self.sshserver:
|
|
# specifying just the key implies that we are connecting directly
|
|
self.sshserver = ip
|
|
ip = localhost()
|
|
|
|
# build connection dict for tunnels:
|
|
info = dict(ip=ip,
|
|
shell_port=self.shell_port,
|
|
iopub_port=self.iopub_port,
|
|
stdin_port=self.stdin_port,
|
|
hb_port=self.hb_port,
|
|
control_port=self.control_port
|
|
)
|
|
|
|
self.log.info("Forwarding connections to %s via %s"%(ip, self.sshserver))
|
|
|
|
# tunnels return a new set of ports, which will be on localhost:
|
|
self.ip = localhost()
|
|
try:
|
|
newports = tunnel_to_kernel(info, self.sshserver, self.sshkey)
|
|
except:
|
|
# even catch KeyboardInterrupt
|
|
self.log.error("Could not setup tunnels", exc_info=True)
|
|
self.exit(1)
|
|
|
|
self.shell_port, self.iopub_port, self.stdin_port, self.hb_port, self.control_port = newports
|
|
|
|
cf = self.connection_file
|
|
root, ext = os.path.splitext(cf)
|
|
self.connection_file = root + '-ssh' + ext
|
|
self.write_connection_file() # write the new connection file
|
|
self.log.info("To connect another client via this tunnel, use:")
|
|
self.log.info("--existing %s" % os.path.basename(self.connection_file))
|
|
|
|
def _new_connection_file(self):
|
|
cf = ''
|
|
while not cf:
|
|
# we don't need a 128b id to distinguish kernels, use more readable
|
|
# 48b node segment (12 hex chars). Users running more than 32k simultaneous
|
|
# kernels can subclass.
|
|
ident = str(uuid.uuid4()).split('-')[-1]
|
|
cf = os.path.join(self.runtime_dir, 'kernel-%s.json' % ident)
|
|
# only keep if it's actually new. Protect against unlikely collision
|
|
# in 48b random search space
|
|
cf = cf if not os.path.exists(cf) else ''
|
|
return cf
|
|
|
|
def init_kernel_manager(self):
|
|
# Don't let Qt or ZMQ swallow KeyboardInterupts.
|
|
if self.existing:
|
|
self.kernel_manager = None
|
|
return
|
|
signal.signal(signal.SIGINT, signal.SIG_DFL)
|
|
|
|
# Create a KernelManager and start a kernel.
|
|
try:
|
|
self.kernel_manager = self.kernel_manager_class(
|
|
ip=self.ip,
|
|
session=self.session,
|
|
transport=self.transport,
|
|
shell_port=self.shell_port,
|
|
iopub_port=self.iopub_port,
|
|
stdin_port=self.stdin_port,
|
|
hb_port=self.hb_port,
|
|
control_port=self.control_port,
|
|
connection_file=self.connection_file,
|
|
kernel_name=self.kernel_name,
|
|
parent=self,
|
|
data_dir=self.data_dir,
|
|
)
|
|
except NoSuchKernel:
|
|
self.log.critical("Could not find kernel %s", self.kernel_name)
|
|
self.exit(1)
|
|
|
|
self.kernel_manager.client_factory = self.kernel_client_class
|
|
kwargs = {}
|
|
kwargs['extra_arguments'] = self.kernel_argv
|
|
self.kernel_manager.start_kernel(**kwargs)
|
|
atexit.register(self.kernel_manager.cleanup_ipc_files)
|
|
|
|
if self.sshserver:
|
|
# ssh, write new connection file
|
|
self.kernel_manager.write_connection_file()
|
|
|
|
# in case KM defaults / ssh writing changes things:
|
|
km = self.kernel_manager
|
|
self.shell_port=km.shell_port
|
|
self.iopub_port=km.iopub_port
|
|
self.stdin_port=km.stdin_port
|
|
self.hb_port=km.hb_port
|
|
self.control_port=km.control_port
|
|
self.connection_file = km.connection_file
|
|
|
|
atexit.register(self.kernel_manager.cleanup_connection_file)
|
|
|
|
def init_kernel_client(self):
|
|
if self.kernel_manager is not None:
|
|
self.kernel_client = self.kernel_manager.client()
|
|
else:
|
|
self.kernel_client = self.kernel_client_class(
|
|
session=self.session,
|
|
ip=self.ip,
|
|
transport=self.transport,
|
|
shell_port=self.shell_port,
|
|
iopub_port=self.iopub_port,
|
|
stdin_port=self.stdin_port,
|
|
hb_port=self.hb_port,
|
|
control_port=self.control_port,
|
|
connection_file=self.connection_file,
|
|
parent=self,
|
|
)
|
|
|
|
self.kernel_client.start_channels()
|
|
|
|
|
|
|
|
def initialize(self, argv=None):
|
|
"""
|
|
Classes which mix this class in should call:
|
|
JupyterConsoleApp.initialize(self,argv)
|
|
"""
|
|
if self._dispatching:
|
|
return
|
|
self.init_connection_file()
|
|
self.init_ssh()
|
|
self.init_kernel_manager()
|
|
self.init_kernel_client()
|
|
|
|
class IPythonConsoleApp(JupyterConsoleApp):
|
|
def __init__(self, *args, **kwargs):
|
|
warnings.warn("IPythonConsoleApp is deprecated. Use JupyterConsoleApp")
|
|
super().__init__(*args, **kwargs)
|