import StringIO import logging import os import random import re import socket import sys import time import urlparse import unittest2 import mitogen.core import mitogen.master import mitogen.utils if mitogen.is_master: # TODO: shouldn't be necessary. import docker DATA_DIR = os.path.join(os.path.dirname(__file__), 'data') sys.path.append(DATA_DIR) mitogen.utils.log_to_file() 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, 0600) return path 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 = '' 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(pattern, data): found = True break try: sock.shutdown(socket.SHUT_RDWR) except socket.error, e: # 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 LogCapturer(object): def __init__(self, name=None): self.sio = StringIO.StringIO() self.logger = logging.getLogger(name) self.handler = logging.StreamHandler(self.sio) self.old_propagate = self.logger.propagate self.old_handlers = self.logger.handlers def start(self): self.logger.handlers = [self.handler] self.logger.propagate = False def stop(self): self.logger.handlers = self.old_handlers self.logger.propagate = self.old_propagate return self.sio.getvalue() 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: return e except BaseException, e: assert 0, '%r raised %r, not %r' % (func, e, exc) assert 0, '%r did not raise %r' % (func, exc) class DockerizedSshDaemon(object): def __init__(self): self.docker = docker.from_env(version='auto') self.container_name = 'mitogen-test-%08x' % (random.getrandbits(64),) self.container = self.docker.containers.run( image='d2mw/mitogen-test', detach=True, privileged=True, publish_all_ports=True, ) self.container.reload() self.port = (self.container.attrs['NetworkSettings']['Ports'] ['22/tcp'][0]['HostPort']) self.host = self.get_host() def get_host(self): if self.docker.api.base_url == 'http+docker://localunixsocket': return 'localhost' parsed = urlparse.urlparse(self.docker.api.base_url) return parsed.netloc.partition(':')[0] def wait_for_sshd(self): wait_for_port(self.get_host(), int(self.port), pattern='OpenSSH') def close(self): self.container.stop() self.container.remove() 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', False) return self.router.ssh(**kwargs) def docker_ssh_any(self, **kwargs): return self.docker_ssh( username='has-sudo-nopw', password='y', )