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435 lines
16 KiB
Python
435 lines
16 KiB
Python
#
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# Copyright 2014 Facebook
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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from contextlib import closing
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import getpass
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import socket
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import unittest
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from tornado.concurrent import Future
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from tornado.netutil import bind_sockets, Resolver
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from tornado.queues import Queue
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from tornado.tcpclient import TCPClient, _Connector
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from tornado.tcpserver import TCPServer
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from tornado.testing import AsyncTestCase, gen_test
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from tornado.test.util import skipIfNoIPv6, refusing_port, skipIfNonUnix
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from tornado.gen import TimeoutError
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import typing
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if typing.TYPE_CHECKING:
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from tornado.iostream import IOStream # noqa: F401
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from typing import List, Dict, Tuple # noqa: F401
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# Fake address families for testing. Used in place of AF_INET
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# and AF_INET6 because some installations do not have AF_INET6.
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AF1, AF2 = 1, 2
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class TestTCPServer(TCPServer):
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def __init__(self, family):
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super().__init__()
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self.streams = [] # type: List[IOStream]
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self.queue = Queue() # type: Queue[IOStream]
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sockets = bind_sockets(0, "localhost", family)
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self.add_sockets(sockets)
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self.port = sockets[0].getsockname()[1]
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def handle_stream(self, stream, address):
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self.streams.append(stream)
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self.queue.put(stream)
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def stop(self):
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super().stop()
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for stream in self.streams:
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stream.close()
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class TCPClientTest(AsyncTestCase):
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def setUp(self):
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super().setUp()
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self.server = None
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self.client = TCPClient()
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def start_server(self, family):
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self.server = TestTCPServer(family)
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return self.server.port
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def stop_server(self):
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if self.server is not None:
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self.server.stop()
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self.server = None
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def tearDown(self):
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self.client.close()
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self.stop_server()
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super().tearDown()
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def skipIfLocalhostV4(self):
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# The port used here doesn't matter, but some systems require it
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# to be non-zero if we do not also pass AI_PASSIVE.
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addrinfo = self.io_loop.run_sync(lambda: Resolver().resolve("localhost", 80))
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families = {addr[0] for addr in addrinfo}
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if socket.AF_INET6 not in families:
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self.skipTest("localhost does not resolve to ipv6")
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@gen_test
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def do_test_connect(self, family, host, source_ip=None, source_port=None):
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port = self.start_server(family)
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stream = yield self.client.connect(
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host,
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port,
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source_ip=source_ip,
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source_port=source_port,
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af=family,
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)
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assert self.server is not None
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server_stream = yield self.server.queue.get()
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with closing(stream):
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stream.write(b"hello")
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data = yield server_stream.read_bytes(5)
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self.assertEqual(data, b"hello")
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def test_connect_ipv4_ipv4(self):
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self.do_test_connect(socket.AF_INET, "127.0.0.1")
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def test_connect_ipv4_dual(self):
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self.do_test_connect(socket.AF_INET, "localhost")
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@skipIfNoIPv6
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def test_connect_ipv6_ipv6(self):
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self.skipIfLocalhostV4()
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self.do_test_connect(socket.AF_INET6, "::1")
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@skipIfNoIPv6
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def test_connect_ipv6_dual(self):
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self.skipIfLocalhostV4()
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self.do_test_connect(socket.AF_INET6, "localhost")
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def test_connect_unspec_ipv4(self):
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self.do_test_connect(socket.AF_UNSPEC, "127.0.0.1")
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@skipIfNoIPv6
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def test_connect_unspec_ipv6(self):
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self.skipIfLocalhostV4()
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self.do_test_connect(socket.AF_UNSPEC, "::1")
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def test_connect_unspec_dual(self):
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self.do_test_connect(socket.AF_UNSPEC, "localhost")
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@gen_test
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def test_refused_ipv4(self):
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cleanup_func, port = refusing_port()
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self.addCleanup(cleanup_func)
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with self.assertRaises(IOError):
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yield self.client.connect("127.0.0.1", port)
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def test_source_ip_fail(self):
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"""Fail when trying to use the source IP Address '8.8.8.8'."""
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self.assertRaises(
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socket.error,
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self.do_test_connect,
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socket.AF_INET,
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"127.0.0.1",
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source_ip="8.8.8.8",
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)
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def test_source_ip_success(self):
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"""Success when trying to use the source IP Address '127.0.0.1'."""
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self.do_test_connect(socket.AF_INET, "127.0.0.1", source_ip="127.0.0.1")
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@skipIfNonUnix
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def test_source_port_fail(self):
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"""Fail when trying to use source port 1."""
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if getpass.getuser() == "root":
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# Root can use any port so we can't easily force this to fail.
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# This is mainly relevant for docker.
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self.skipTest("running as root")
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self.assertRaises(
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socket.error,
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self.do_test_connect,
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socket.AF_INET,
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"127.0.0.1",
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source_port=1,
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)
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@gen_test
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def test_connect_timeout(self):
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timeout = 0.05
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class TimeoutResolver(Resolver):
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def resolve(self, *args, **kwargs):
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return Future() # never completes
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with self.assertRaises(TimeoutError):
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yield TCPClient(resolver=TimeoutResolver()).connect(
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"1.2.3.4", 12345, timeout=timeout
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)
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class TestConnectorSplit(unittest.TestCase):
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def test_one_family(self):
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# These addresses aren't in the right format, but split doesn't care.
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primary, secondary = _Connector.split([(AF1, "a"), (AF1, "b")])
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self.assertEqual(primary, [(AF1, "a"), (AF1, "b")])
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self.assertEqual(secondary, [])
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def test_mixed(self):
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primary, secondary = _Connector.split(
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[(AF1, "a"), (AF2, "b"), (AF1, "c"), (AF2, "d")]
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)
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self.assertEqual(primary, [(AF1, "a"), (AF1, "c")])
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self.assertEqual(secondary, [(AF2, "b"), (AF2, "d")])
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class ConnectorTest(AsyncTestCase):
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class FakeStream:
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def __init__(self):
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self.closed = False
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def close(self):
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self.closed = True
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def setUp(self):
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super().setUp()
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self.connect_futures = (
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{}
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) # type: Dict[Tuple[int, typing.Any], Future[ConnectorTest.FakeStream]]
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self.streams = {} # type: Dict[typing.Any, ConnectorTest.FakeStream]
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self.addrinfo = [(AF1, "a"), (AF1, "b"), (AF2, "c"), (AF2, "d")]
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def tearDown(self):
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# Unless explicitly checked (and popped) in the test, we shouldn't
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# be closing any streams
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for stream in self.streams.values():
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self.assertFalse(stream.closed)
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super().tearDown()
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def create_stream(self, af, addr):
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stream = ConnectorTest.FakeStream()
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self.streams[addr] = stream
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future = Future() # type: Future[ConnectorTest.FakeStream]
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self.connect_futures[(af, addr)] = future
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return stream, future
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def assert_pending(self, *keys):
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self.assertEqual(sorted(self.connect_futures.keys()), sorted(keys))
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def resolve_connect(self, af, addr, success):
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future = self.connect_futures.pop((af, addr))
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if success:
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future.set_result(self.streams[addr])
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else:
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self.streams.pop(addr)
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future.set_exception(IOError())
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# Run the loop to allow callbacks to be run.
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self.io_loop.add_callback(self.stop)
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self.wait()
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def assert_connector_streams_closed(self, conn):
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for stream in conn.streams:
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self.assertTrue(stream.closed)
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def start_connect(self, addrinfo):
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conn = _Connector(addrinfo, self.create_stream)
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# Give it a huge timeout; we'll trigger timeouts manually.
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future = conn.start(3600, connect_timeout=self.io_loop.time() + 3600)
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return conn, future
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def test_immediate_success(self):
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conn, future = self.start_connect(self.addrinfo)
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self.assertEqual(list(self.connect_futures.keys()), [(AF1, "a")])
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self.resolve_connect(AF1, "a", True)
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self.assertEqual(future.result(), (AF1, "a", self.streams["a"]))
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def test_immediate_failure(self):
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# Fail with just one address.
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conn, future = self.start_connect([(AF1, "a")])
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self.assert_pending((AF1, "a"))
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self.resolve_connect(AF1, "a", False)
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self.assertRaises(IOError, future.result)
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def test_one_family_second_try(self):
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conn, future = self.start_connect([(AF1, "a"), (AF1, "b")])
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self.assert_pending((AF1, "a"))
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self.resolve_connect(AF1, "a", False)
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self.assert_pending((AF1, "b"))
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self.resolve_connect(AF1, "b", True)
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self.assertEqual(future.result(), (AF1, "b", self.streams["b"]))
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def test_one_family_second_try_failure(self):
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conn, future = self.start_connect([(AF1, "a"), (AF1, "b")])
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self.assert_pending((AF1, "a"))
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self.resolve_connect(AF1, "a", False)
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self.assert_pending((AF1, "b"))
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self.resolve_connect(AF1, "b", False)
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self.assertRaises(IOError, future.result)
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def test_one_family_second_try_timeout(self):
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conn, future = self.start_connect([(AF1, "a"), (AF1, "b")])
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self.assert_pending((AF1, "a"))
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# trigger the timeout while the first lookup is pending;
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# nothing happens.
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conn.on_timeout()
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self.assert_pending((AF1, "a"))
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self.resolve_connect(AF1, "a", False)
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self.assert_pending((AF1, "b"))
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self.resolve_connect(AF1, "b", True)
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self.assertEqual(future.result(), (AF1, "b", self.streams["b"]))
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def test_two_families_immediate_failure(self):
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conn, future = self.start_connect(self.addrinfo)
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self.assert_pending((AF1, "a"))
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self.resolve_connect(AF1, "a", False)
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self.assert_pending((AF1, "b"), (AF2, "c"))
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self.resolve_connect(AF1, "b", False)
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self.resolve_connect(AF2, "c", True)
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self.assertEqual(future.result(), (AF2, "c", self.streams["c"]))
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def test_two_families_timeout(self):
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conn, future = self.start_connect(self.addrinfo)
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self.assert_pending((AF1, "a"))
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conn.on_timeout()
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self.assert_pending((AF1, "a"), (AF2, "c"))
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self.resolve_connect(AF2, "c", True)
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self.assertEqual(future.result(), (AF2, "c", self.streams["c"]))
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# resolving 'a' after the connection has completed doesn't start 'b'
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self.resolve_connect(AF1, "a", False)
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self.assert_pending()
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def test_success_after_timeout(self):
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conn, future = self.start_connect(self.addrinfo)
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self.assert_pending((AF1, "a"))
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conn.on_timeout()
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self.assert_pending((AF1, "a"), (AF2, "c"))
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self.resolve_connect(AF1, "a", True)
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self.assertEqual(future.result(), (AF1, "a", self.streams["a"]))
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# resolving 'c' after completion closes the connection.
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self.resolve_connect(AF2, "c", True)
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self.assertTrue(self.streams.pop("c").closed)
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def test_all_fail(self):
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conn, future = self.start_connect(self.addrinfo)
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self.assert_pending((AF1, "a"))
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conn.on_timeout()
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self.assert_pending((AF1, "a"), (AF2, "c"))
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self.resolve_connect(AF2, "c", False)
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self.assert_pending((AF1, "a"), (AF2, "d"))
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self.resolve_connect(AF2, "d", False)
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# one queue is now empty
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self.assert_pending((AF1, "a"))
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self.resolve_connect(AF1, "a", False)
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self.assert_pending((AF1, "b"))
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self.assertFalse(future.done())
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self.resolve_connect(AF1, "b", False)
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self.assertRaises(IOError, future.result)
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def test_one_family_timeout_after_connect_timeout(self):
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conn, future = self.start_connect([(AF1, "a"), (AF1, "b")])
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self.assert_pending((AF1, "a"))
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conn.on_connect_timeout()
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# the connector will close all streams on connect timeout, we
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# should explicitly pop the connect_future.
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self.connect_futures.pop((AF1, "a"))
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self.assertTrue(self.streams.pop("a").closed)
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conn.on_timeout()
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# if the future is set with TimeoutError, we will not iterate next
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# possible address.
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self.assert_pending()
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self.assertEqual(len(conn.streams), 1)
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self.assert_connector_streams_closed(conn)
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self.assertRaises(TimeoutError, future.result)
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def test_one_family_success_before_connect_timeout(self):
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conn, future = self.start_connect([(AF1, "a"), (AF1, "b")])
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self.assert_pending((AF1, "a"))
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self.resolve_connect(AF1, "a", True)
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conn.on_connect_timeout()
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self.assert_pending()
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self.assertFalse(self.streams["a"].closed)
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# success stream will be pop
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self.assertEqual(len(conn.streams), 0)
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# streams in connector should be closed after connect timeout
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self.assert_connector_streams_closed(conn)
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self.assertEqual(future.result(), (AF1, "a", self.streams["a"]))
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def test_one_family_second_try_after_connect_timeout(self):
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conn, future = self.start_connect([(AF1, "a"), (AF1, "b")])
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self.assert_pending((AF1, "a"))
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self.resolve_connect(AF1, "a", False)
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self.assert_pending((AF1, "b"))
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conn.on_connect_timeout()
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self.connect_futures.pop((AF1, "b"))
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self.assertTrue(self.streams.pop("b").closed)
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self.assert_pending()
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self.assertEqual(len(conn.streams), 2)
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self.assert_connector_streams_closed(conn)
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self.assertRaises(TimeoutError, future.result)
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def test_one_family_second_try_failure_before_connect_timeout(self):
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conn, future = self.start_connect([(AF1, "a"), (AF1, "b")])
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self.assert_pending((AF1, "a"))
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self.resolve_connect(AF1, "a", False)
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self.assert_pending((AF1, "b"))
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self.resolve_connect(AF1, "b", False)
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conn.on_connect_timeout()
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self.assert_pending()
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self.assertEqual(len(conn.streams), 2)
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self.assert_connector_streams_closed(conn)
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self.assertRaises(IOError, future.result)
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def test_two_family_timeout_before_connect_timeout(self):
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conn, future = self.start_connect(self.addrinfo)
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self.assert_pending((AF1, "a"))
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conn.on_timeout()
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self.assert_pending((AF1, "a"), (AF2, "c"))
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conn.on_connect_timeout()
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self.connect_futures.pop((AF1, "a"))
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self.assertTrue(self.streams.pop("a").closed)
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self.connect_futures.pop((AF2, "c"))
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self.assertTrue(self.streams.pop("c").closed)
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self.assert_pending()
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self.assertEqual(len(conn.streams), 2)
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self.assert_connector_streams_closed(conn)
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self.assertRaises(TimeoutError, future.result)
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def test_two_family_success_after_timeout(self):
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conn, future = self.start_connect(self.addrinfo)
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self.assert_pending((AF1, "a"))
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conn.on_timeout()
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self.assert_pending((AF1, "a"), (AF2, "c"))
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self.resolve_connect(AF1, "a", True)
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# if one of streams succeed, connector will close all other streams
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self.connect_futures.pop((AF2, "c"))
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self.assertTrue(self.streams.pop("c").closed)
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self.assert_pending()
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self.assertEqual(len(conn.streams), 1)
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self.assert_connector_streams_closed(conn)
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self.assertEqual(future.result(), (AF1, "a", self.streams["a"]))
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def test_two_family_timeout_after_connect_timeout(self):
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conn, future = self.start_connect(self.addrinfo)
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self.assert_pending((AF1, "a"))
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conn.on_connect_timeout()
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self.connect_futures.pop((AF1, "a"))
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self.assertTrue(self.streams.pop("a").closed)
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self.assert_pending()
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conn.on_timeout()
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# if the future is set with TimeoutError, connector will not
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# trigger secondary address.
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self.assert_pending()
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self.assertEqual(len(conn.streams), 1)
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self.assert_connector_streams_closed(conn)
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self.assertRaises(TimeoutError, future.result)
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