import logging import os import random import re import socket import subprocess import sys import time import unittest2 import mitogen.core import mitogen.master import mitogen.utils try: import faulthandler except ImportError: pass try: import urlparse except ImportError: import urllib.parse as urlparse try: from cStringIO import StringIO except ImportError: from io import StringIO LOG = logging.getLogger(__name__) DATA_DIR = os.path.join(os.path.dirname(__file__), 'data') sys.path.append(DATA_DIR) if mitogen.is_master: mitogen.utils.log_to_file() if faulthandler is not None: faulthandler.enable() def data_path(suffix): path = os.path.join(DATA_DIR, suffix) if path.endswith('.key'): # SSH is funny about private key permissions. os.chmod(path, int('0600', 8)) return path def subprocess__check_output(*popenargs, **kwargs): # Missing from 2.6. process = subprocess.Popen(stdout=subprocess.PIPE, *popenargs, **kwargs) output, _ = process.communicate() retcode = process.poll() if retcode: cmd = kwargs.get("args") if cmd is None: cmd = popenargs[0] raise subprocess.CalledProcessError(retcode, cmd) return output if hasattr(subprocess, 'check_output'): subprocess__check_output = subprocess.check_output def wait_for_port( host, port, pattern=None, connect_timeout=0.5, receive_timeout=0.5, overall_timeout=5.0, sleep=0.1, ): """Attempt to connect to host/port, for upto overall_timeout seconds. If a regex pattern is supplied try to find it in the initial data. Return None on success, or raise on error. """ start = time.time() end = start + overall_timeout addr = (host, port) while time.time() < end: sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.settimeout(connect_timeout) try: sock.connect(addr) except socket.error: # Failed to connect. So wait then retry. time.sleep(sleep) continue if not pattern: # Success: We connected & there's no banner check to perform. sock.shutdown(socket.SHUTD_RDWR) sock.close() return sock.settimeout(receive_timeout) data = mitogen.core.b('') found = False while time.time() < end: try: resp = sock.recv(1024) except socket.timeout: # Server stayed up, but had no data. Retry the recv(). continue if not resp: # Server went away. Wait then retry the connection. time.sleep(sleep) break data += resp if re.search(mitogen.core.b(pattern), data): found = True break try: sock.shutdown(socket.SHUT_RDWR) except socket.error: e = sys.exc_info()[1] # On Mac OS X - a BSD variant - the above code only succeeds if the # operating system thinks that the socket is still open when # shutdown() is invoked. If Python is too slow and the FIN packet # arrives before that statement can be reached, then OS X kills the # sock.shutdown() statement with: # # socket.error: [Errno 57] Socket is not connected # # Protect shutdown() with a try...except that catches the # socket.error, test to make sure Errno is right, and ignore it if # Errno matches. if e.errno == 57: pass else: raise sock.close() if found: # Success: We received the banner & found the desired pattern return else: # Failure: The overall timeout expired if pattern: raise socket.timeout('Timed out while searching for %r from %s:%s' % (pattern, host, port)) else: raise socket.timeout('Timed out while connecting to %s:%s' % (host, port)) def sync_with_broker(broker, timeout=10.0): """ Insert a synchronization barrier between the calling thread and the Broker thread, ensuring it has completed at least one full IO loop before returning. Used to block while asynchronous stuff (like defer()) happens on the broker. """ sem = mitogen.core.Latch() broker.defer(sem.put, None) sem.get(timeout=10.0) class CaptureStreamHandler(logging.StreamHandler): def __init__(self, *args, **kwargs): logging.StreamHandler.__init__(self, *args, **kwargs) self.msgs = [] def emit(self, msg): self.msgs.append(msg) logging.StreamHandler.emit(self, msg) class LogCapturer(object): def __init__(self, name=None): self.sio = StringIO() self.logger = logging.getLogger(name) self.handler = CaptureStreamHandler(self.sio) self.old_propagate = self.logger.propagate self.old_handlers = self.logger.handlers self.old_level = self.logger.level def start(self): self.logger.handlers = [self.handler] self.logger.propagate = False self.logger.level = logging.DEBUG def raw(self): return self.sio.getvalue() def msgs(self): return self.handler.msgs def __enter__(self): self.start() return self def __exit__(self, _1, _2, _3): self.stop() def stop(self): self.logger.level = self.old_level self.logger.handlers = self.old_handlers self.logger.propagate = self.old_propagate return self.raw() class TestCase(unittest2.TestCase): def assertRaises(self, exc, func, *args, **kwargs): """Like regular assertRaises, except return the exception that was raised. Can't use context manager because tests must run on Python2.4""" try: func(*args, **kwargs) except exc: e = sys.exc_info()[1] return e except BaseException: LOG.exception('Original exception') e = sys.exc_info()[1] assert 0, '%r raised %r, not %r' % (func, e, exc) assert 0, '%r did not raise %r' % (func, exc) def get_docker_host(): url = os.environ.get('DOCKER_HOST') if url in (None, 'http+docker://localunixsocket'): return 'localhost' parsed = urlparse.urlparse(url) return parsed.netloc.partition(':')[0] class DockerizedSshDaemon(object): image = None def get_image(self): if not self.image: distro = os.environ.get('MITOGEN_TEST_DISTRO', 'debian') self.image = 'mitogen/%s-test' % (distro,) return self.image # 22/tcp -> 0.0.0.0:32771 PORT_RE = re.compile(r'([^/]+)/([^ ]+) -> ([^:]+):(.*)') port = None def _get_container_port(self): s = subprocess__check_output(['docker', 'port', self.container_name]) for line in s.decode().splitlines(): dport, proto, baddr, bport = self.PORT_RE.match(line).groups() if dport == '22' and proto == 'tcp': self.port = int(bport) self.host = self.get_host() if self.port is None: raise ValueError('could not find SSH port in: %r' % (s,)) def start_container(self): self.container_name = 'mitogen-test-%08x' % (random.getrandbits(64),) args = [ 'docker', 'run', '--detach', '--privileged', '--publish-all', '--name', self.container_name, self.get_image() ] subprocess__check_output(args) self._get_container_port() def __init__(self): self.start_container() def get_host(self): return get_docker_host() def wait_for_sshd(self): wait_for_port(self.get_host(), self.port, pattern='OpenSSH') def close(self): args = ['docker', 'rm', '-f', self.container_name] subprocess__check_output(args) class BrokerMixin(object): broker_class = mitogen.master.Broker def setUp(self): super(BrokerMixin, self).setUp() self.broker = self.broker_class() def tearDown(self): self.broker.shutdown() self.broker.join() super(BrokerMixin, self).tearDown() def sync_with_broker(self): sync_with_broker(self.broker) class RouterMixin(BrokerMixin): router_class = mitogen.master.Router def setUp(self): super(RouterMixin, self).setUp() self.router = self.router_class(self.broker) class DockerMixin(RouterMixin): @classmethod def setUpClass(cls): super(DockerMixin, cls).setUpClass() cls.dockerized_ssh = DockerizedSshDaemon() cls.dockerized_ssh.wait_for_sshd() @classmethod def tearDownClass(cls): cls.dockerized_ssh.close() super(DockerMixin, cls).tearDownClass() def docker_ssh(self, **kwargs): kwargs.setdefault('hostname', self.dockerized_ssh.host) kwargs.setdefault('port', self.dockerized_ssh.port) kwargs.setdefault('check_host_keys', 'ignore') kwargs.setdefault('ssh_debug_level', 3) return self.router.ssh(**kwargs) def docker_ssh_any(self, **kwargs): return self.docker_ssh( username='mitogen__has_sudo_nopw', password='has_sudo_nopw_password', )