/
test_connect.py
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test_connect.py
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"""Tests for kernel connection utilities"""
# Copyright (c) Jupyter Development Team.
# Distributed under the terms of the Modified BSD License.
import json
import os
import re
import stat
import tempfile
import shutil
from traitlets.config import Config
from jupyter_core.application import JupyterApp
from jupyter_core.paths import jupyter_runtime_dir
from ipython_genutils.tempdir import TemporaryDirectory, TemporaryWorkingDirectory
from ipython_genutils.py3compat import str_to_bytes
from jupyter_client import connect, KernelClient
from jupyter_client.consoleapp import JupyterConsoleApp
from jupyter_client.session import Session
from jupyter_client.connect import secure_write
class DummyConsoleApp(JupyterApp, JupyterConsoleApp):
def initialize(self, argv=[]):
JupyterApp.initialize(self, argv=argv)
self.init_connection_file()
class DummyConfigurable(connect.ConnectionFileMixin):
def initialize(self):
pass
sample_info = dict(ip='1.2.3.4', transport='ipc',
shell_port=1, hb_port=2, iopub_port=3, stdin_port=4, control_port=5,
key=b'abc123', signature_scheme='hmac-md5', kernel_name='python'
)
sample_info_kn = dict(ip='1.2.3.4', transport='ipc',
shell_port=1, hb_port=2, iopub_port=3, stdin_port=4, control_port=5,
key=b'abc123', signature_scheme='hmac-md5', kernel_name='test'
)
def test_write_connection_file():
with TemporaryDirectory() as d:
cf = os.path.join(d, 'kernel.json')
connect.write_connection_file(cf, **sample_info)
assert os.path.exists(cf)
with open(cf, 'r') as f:
info = json.load(f)
info['key'] = str_to_bytes(info['key'])
assert info == sample_info
def test_load_connection_file_session():
"""test load_connection_file() after """
session = Session()
app = DummyConsoleApp(session=Session())
app.initialize(argv=[])
session = app.session
with TemporaryDirectory() as d:
cf = os.path.join(d, 'kernel.json')
connect.write_connection_file(cf, **sample_info)
app.connection_file = cf
app.load_connection_file()
assert session.key == sample_info['key']
assert session.signature_scheme == sample_info['signature_scheme']
def test_load_connection_file_session_with_kn():
"""test load_connection_file() after """
session = Session()
app = DummyConsoleApp(session=Session())
app.initialize(argv=[])
session = app.session
with TemporaryDirectory() as d:
cf = os.path.join(d, 'kernel.json')
connect.write_connection_file(cf, **sample_info_kn)
app.connection_file = cf
app.load_connection_file()
assert session.key == sample_info_kn['key']
assert session.signature_scheme == sample_info_kn['signature_scheme']
def test_app_load_connection_file():
"""test `ipython console --existing` loads a connection file"""
with TemporaryDirectory() as d:
cf = os.path.join(d, 'kernel.json')
connect.write_connection_file(cf, **sample_info)
app = DummyConsoleApp(connection_file=cf)
app.initialize(argv=[])
for attr, expected in sample_info.items():
if attr in ('key', 'signature_scheme'):
continue
value = getattr(app, attr)
assert value == expected, "app.%s = %s != %s" % (attr, value, expected)
def test_load_connection_info():
client = KernelClient()
info = {
'control_port': 53702,
'hb_port': 53705,
'iopub_port': 53703,
'ip': '0.0.0.0',
'key': 'secret',
'shell_port': 53700,
'signature_scheme': 'hmac-sha256',
'stdin_port': 53701,
'transport': 'tcp',
}
client.load_connection_info(info)
assert client.control_port == info['control_port']
assert client.session.key.decode('ascii') == info['key']
assert client.ip == info['ip']
def test_find_connection_file():
with TemporaryDirectory() as d:
cf = 'kernel.json'
app = DummyConsoleApp(runtime_dir=d, connection_file=cf)
app.initialize()
security_dir = app.runtime_dir
profile_cf = os.path.join(security_dir, cf)
with open(profile_cf, 'w') as f:
f.write("{}")
for query in (
'kernel.json',
'kern*',
'*ernel*',
'k*',
):
assert connect.find_connection_file(query, path=security_dir) == profile_cf
def test_find_connection_file_local():
with TemporaryWorkingDirectory() as d:
cf = 'test.json'
abs_cf = os.path.abspath(cf)
with open(cf, 'w') as f:
f.write('{}')
for query in (
'test.json',
'test',
abs_cf,
os.path.join('.', 'test.json'),
):
assert connect.find_connection_file(query, path=['.', jupyter_runtime_dir()]) == abs_cf
def test_find_connection_file_relative():
with TemporaryWorkingDirectory() as d:
cf = 'test.json'
os.mkdir('subdir')
cf = os.path.join('subdir', 'test.json')
abs_cf = os.path.abspath(cf)
with open(cf, 'w') as f:
f.write('{}')
for query in (
os.path.join('.', 'subdir', 'test.json'),
os.path.join('subdir', 'test.json'),
abs_cf,
):
assert connect.find_connection_file(query, path=['.', jupyter_runtime_dir()]) == abs_cf
def test_find_connection_file_abspath():
with TemporaryDirectory() as d:
cf = 'absolute.json'
abs_cf = os.path.abspath(cf)
with open(cf, 'w') as f:
f.write('{}')
assert connect.find_connection_file(abs_cf, path=jupyter_runtime_dir()) == abs_cf
os.remove(abs_cf)
def test_mixin_record_random_ports():
with TemporaryDirectory() as d:
dc = DummyConfigurable(data_dir=d, kernel_name='via-tcp', transport='tcp')
dc.write_connection_file()
assert dc._connection_file_written
assert os.path.exists(dc.connection_file)
assert dc._random_port_names == connect.port_names
def test_mixin_cleanup_random_ports():
with TemporaryDirectory() as d:
dc = DummyConfigurable(data_dir=d, kernel_name='via-tcp', transport='tcp')
dc.write_connection_file()
filename = dc.connection_file
dc.cleanup_random_ports()
assert not os.path.exists(filename)
for name in dc._random_port_names:
assert getattr(dc, name) == 0
def test_secure_write():
def fetch_win32_permissions(filename):
'''Extracts file permissions on windows using icacls'''
role_permissions = {}
for index, line in enumerate(os.popen("icacls %s" % filename).read().splitlines()):
if index == 0:
line = line.split(filename)[-1].strip().lower()
match = re.match(r'\s*([^:]+):\(([^\)]*)\)', line)
if match:
usergroup, permissions = match.groups()
usergroup = usergroup.lower().split('\\')[-1]
permissions = set(p.lower() for p in permissions.split(','))
role_permissions[usergroup] = permissions
elif not line.strip():
break
return role_permissions
def check_user_only_permissions(fname):
# Windows has it's own permissions ACL patterns
if os.name == 'nt':
import win32api
username = win32api.GetUserName().lower()
permissions = fetch_win32_permissions(fname)
assert username in permissions
assert permissions[username] == set(['r', 'w'])
assert 'administrators' in permissions
assert permissions['administrators'] == set(['f'])
assert 'everyone' not in permissions
assert len(permissions) == 2
else:
mode = os.stat(fname).st_mode
assert '0600' == oct(stat.S_IMODE(mode)).replace('0o', '0')
directory = tempfile.mkdtemp()
fname = os.path.join(directory, 'check_perms')
try:
with secure_write(fname) as f:
f.write('test 1')
check_user_only_permissions(fname)
with open(fname, 'r') as f:
assert f.read() == 'test 1'
# Try changing file permissions ahead of time
os.chmod(fname, 0o755)
with secure_write(fname) as f:
f.write('test 2')
check_user_only_permissions(fname)
with open(fname, 'r') as f:
assert f.read() == 'test 2'
finally:
shutil.rmtree(directory)