| Current File : //proc/self/root/lib/python3/dist-packages/twisted/test/test_tcp.py |
# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
"""
Tests for implementations of L{IReactorTCP}.
"""
import errno
import random
import socket
from functools import wraps
from typing import Callable, Optional
from unittest import skipIf
from zope.interface import implementer
import hamcrest
from twisted.internet import defer, error, interfaces, protocol, reactor
from twisted.internet.address import IPv4Address
from twisted.internet.interfaces import IHalfCloseableProtocol, IPullProducer
from twisted.internet.protocol import Protocol
from twisted.internet.testing import AccumulatingProtocol
from twisted.protocols import policies
from twisted.python.log import err, msg
from twisted.python.runtime import platform
from twisted.trial.unittest import SkipTest, TestCase
def loopUntil(predicate, interval=0):
"""
Poor excuse for an event notification helper. This polls a condition and
calls back a Deferred when it is seen to be true.
Do not use this function.
"""
from twisted.internet import task
d = defer.Deferred()
def check():
res = predicate()
if res:
d.callback(res)
call = task.LoopingCall(check)
def stop(result):
call.stop()
return result
d.addCallback(stop)
d2 = call.start(interval)
d2.addErrback(d.errback)
return d
class ClosingProtocol(protocol.Protocol):
def connectionMade(self):
msg("ClosingProtocol.connectionMade")
self.transport.loseConnection()
def connectionLost(self, reason):
msg("ClosingProtocol.connectionLost")
reason.trap(error.ConnectionDone)
class ClosingFactory(protocol.ServerFactory):
"""
Factory that closes port immediately.
"""
_cleanerUpper = None
def buildProtocol(self, conn):
self._cleanerUpper = self.port.stopListening()
return ClosingProtocol()
def cleanUp(self):
"""
Clean-up for tests to wait for the port to stop listening.
"""
if self._cleanerUpper is None:
return self.port.stopListening()
return self._cleanerUpper
class MyProtocolFactoryMixin:
"""
Mixin for factories which create L{AccumulatingProtocol} instances.
@type protocolFactory: no-argument callable
@ivar protocolFactory: Factory for protocols - takes the place of the
typical C{protocol} attribute of factories (but that name is used by
this class for something else).
@type protocolConnectionMade: L{None} or L{defer.Deferred}
@ivar protocolConnectionMade: When an instance of L{AccumulatingProtocol}
is connected, if this is not L{None}, the L{Deferred} will be called
back with the protocol instance and the attribute set to L{None}.
@type protocolConnectionLost: L{None} or L{defer.Deferred}
@ivar protocolConnectionLost: When an instance of L{AccumulatingProtocol}
is created, this will be set as its C{closedDeferred} attribute and
then this attribute will be set to L{None} so the L{defer.Deferred} is
not used by more than one protocol.
@ivar protocol: The most recently created L{AccumulatingProtocol} instance
which was returned from C{buildProtocol}.
@type called: C{int}
@ivar called: A counter which is incremented each time C{buildProtocol}
is called.
@ivar peerAddresses: A C{list} of the addresses passed to C{buildProtocol}.
"""
protocolFactory = AccumulatingProtocol
protocolConnectionMade = None
protocolConnectionLost = None
protocol: Optional[Callable[[], Protocol]] = None
called = 0
def __init__(self):
self.peerAddresses = []
def buildProtocol(self, addr):
"""
Create a L{AccumulatingProtocol} and set it up to be able to perform
callbacks.
"""
self.peerAddresses.append(addr)
self.called += 1
p = self.protocolFactory()
p.factory = self
p.closedDeferred = self.protocolConnectionLost
self.protocolConnectionLost = None
self.protocol = p
return p
class MyServerFactory(MyProtocolFactoryMixin, protocol.ServerFactory):
"""
Server factory which creates L{AccumulatingProtocol} instances.
"""
class MyClientFactory(MyProtocolFactoryMixin, protocol.ClientFactory):
"""
Client factory which creates L{AccumulatingProtocol} instances.
"""
failed = 0
stopped = 0
def __init__(self):
MyProtocolFactoryMixin.__init__(self)
self.deferred = defer.Deferred()
self.failDeferred = defer.Deferred()
def clientConnectionFailed(self, connector, reason):
self.failed = 1
self.reason = reason
self.failDeferred.callback(None)
def clientConnectionLost(self, connector, reason):
self.lostReason = reason
self.deferred.callback(None)
def stopFactory(self):
self.stopped = 1
class ListeningTests(TestCase):
def test_listen(self):
"""
L{IReactorTCP.listenTCP} returns an object which provides
L{IListeningPort}.
"""
f = MyServerFactory()
p1 = reactor.listenTCP(0, f, interface="127.0.0.1")
self.addCleanup(p1.stopListening)
self.assertTrue(interfaces.IListeningPort.providedBy(p1))
def testStopListening(self):
"""
The L{IListeningPort} returned by L{IReactorTCP.listenTCP} can be
stopped with its C{stopListening} method. After the L{Deferred} it
(optionally) returns has been called back, the port number can be bound
to a new server.
"""
f = MyServerFactory()
port = reactor.listenTCP(0, f, interface="127.0.0.1")
n = port.getHost().port
def cbStopListening(ignored):
# Make sure we can rebind the port right away
port = reactor.listenTCP(n, f, interface="127.0.0.1")
return port.stopListening()
d = defer.maybeDeferred(port.stopListening)
d.addCallback(cbStopListening)
return d
def testNumberedInterface(self):
f = MyServerFactory()
# listen only on the loopback interface
p1 = reactor.listenTCP(0, f, interface="127.0.0.1")
return p1.stopListening()
def testPortRepr(self):
f = MyServerFactory()
p = reactor.listenTCP(0, f)
portNo = str(p.getHost().port)
self.assertFalse(repr(p).find(portNo) == -1)
def stoppedListening(ign):
self.assertFalse(repr(p).find(portNo) != -1)
d = defer.maybeDeferred(p.stopListening)
return d.addCallback(stoppedListening)
def test_serverRepr(self):
"""
Check that the repr string of the server transport get the good port
number if the server listens on 0.
"""
server = MyServerFactory()
serverConnMade = server.protocolConnectionMade = defer.Deferred()
port = reactor.listenTCP(0, server)
self.addCleanup(port.stopListening)
client = MyClientFactory()
clientConnMade = client.protocolConnectionMade = defer.Deferred()
connector = reactor.connectTCP("127.0.0.1", port.getHost().port, client)
self.addCleanup(connector.disconnect)
def check(result):
serverProto, clientProto = result
portNumber = port.getHost().port
self.assertEqual(
repr(serverProto.transport),
f"<AccumulatingProtocol #0 on {portNumber}>",
)
serverProto.transport.loseConnection()
clientProto.transport.loseConnection()
return defer.gatherResults([serverConnMade, clientConnMade]).addCallback(check)
def test_restartListening(self):
"""
Stop and then try to restart a L{tcp.Port}: after a restart, the
server should be able to handle client connections.
"""
serverFactory = MyServerFactory()
port = reactor.listenTCP(0, serverFactory, interface="127.0.0.1")
self.addCleanup(port.stopListening)
def cbStopListening(ignored):
port.startListening()
client = MyClientFactory()
serverFactory.protocolConnectionMade = defer.Deferred()
client.protocolConnectionMade = defer.Deferred()
connector = reactor.connectTCP("127.0.0.1", port.getHost().port, client)
self.addCleanup(connector.disconnect)
return defer.gatherResults(
[serverFactory.protocolConnectionMade, client.protocolConnectionMade]
).addCallback(close)
def close(result):
serverProto, clientProto = result
clientProto.transport.loseConnection()
serverProto.transport.loseConnection()
d = defer.maybeDeferred(port.stopListening)
d.addCallback(cbStopListening)
return d
def test_exceptInStop(self):
"""
If the server factory raises an exception in C{stopFactory}, the
deferred returned by L{tcp.Port.stopListening} should fail with the
corresponding error.
"""
serverFactory = MyServerFactory()
def raiseException():
raise RuntimeError("An error")
serverFactory.stopFactory = raiseException
port = reactor.listenTCP(0, serverFactory, interface="127.0.0.1")
return self.assertFailure(port.stopListening(), RuntimeError)
def test_restartAfterExcept(self):
"""
Even if the server factory raise an exception in C{stopFactory}, the
corresponding C{tcp.Port} instance should be in a sane state and can
be restarted.
"""
serverFactory = MyServerFactory()
def raiseException():
raise RuntimeError("An error")
serverFactory.stopFactory = raiseException
port = reactor.listenTCP(0, serverFactory, interface="127.0.0.1")
self.addCleanup(port.stopListening)
def cbStopListening(ignored):
del serverFactory.stopFactory
port.startListening()
client = MyClientFactory()
serverFactory.protocolConnectionMade = defer.Deferred()
client.protocolConnectionMade = defer.Deferred()
connector = reactor.connectTCP("127.0.0.1", port.getHost().port, client)
self.addCleanup(connector.disconnect)
return defer.gatherResults(
[serverFactory.protocolConnectionMade, client.protocolConnectionMade]
).addCallback(close)
def close(result):
serverProto, clientProto = result
clientProto.transport.loseConnection()
serverProto.transport.loseConnection()
return self.assertFailure(port.stopListening(), RuntimeError).addCallback(
cbStopListening
)
def test_directConnectionLostCall(self):
"""
If C{connectionLost} is called directly on a port object, it succeeds
(and doesn't expect the presence of a C{deferred} attribute).
C{connectionLost} is called by L{reactor.disconnectAll} at shutdown.
"""
serverFactory = MyServerFactory()
port = reactor.listenTCP(0, serverFactory, interface="127.0.0.1")
portNumber = port.getHost().port
port.connectionLost(None)
client = MyClientFactory()
serverFactory.protocolConnectionMade = defer.Deferred()
client.protocolConnectionMade = defer.Deferred()
reactor.connectTCP("127.0.0.1", portNumber, client)
def check(ign):
client.reason.trap(error.ConnectionRefusedError)
return client.failDeferred.addCallback(check)
def test_exceptInConnectionLostCall(self):
"""
If C{connectionLost} is called directory on a port object and that the
server factory raises an exception in C{stopFactory}, the exception is
passed through to the caller.
C{connectionLost} is called by L{reactor.disconnectAll} at shutdown.
"""
serverFactory = MyServerFactory()
def raiseException():
raise RuntimeError("An error")
serverFactory.stopFactory = raiseException
port = reactor.listenTCP(0, serverFactory, interface="127.0.0.1")
self.assertRaises(RuntimeError, port.connectionLost, None)
class LoopbackTests(TestCase):
"""
Test loopback connections.
"""
def test_closePortInProtocolFactory(self):
"""
A port created with L{IReactorTCP.listenTCP} can be connected to with
L{IReactorTCP.connectTCP}.
"""
f = ClosingFactory()
port = reactor.listenTCP(0, f, interface="127.0.0.1")
f.port = port
self.addCleanup(f.cleanUp)
portNumber = port.getHost().port
clientF = MyClientFactory()
reactor.connectTCP("127.0.0.1", portNumber, clientF)
def check(x):
self.assertTrue(clientF.protocol.made)
self.assertTrue(port.disconnected)
clientF.lostReason.trap(error.ConnectionDone)
return clientF.deferred.addCallback(check)
def _trapCnxDone(self, obj):
getattr(obj, "trap", lambda x: None)(error.ConnectionDone)
def _connectedClientAndServerTest(self, callback):
"""
Invoke the given callback with a client protocol and a server protocol
which have been connected to each other.
"""
serverFactory = MyServerFactory()
serverConnMade = defer.Deferred()
serverFactory.protocolConnectionMade = serverConnMade
port = reactor.listenTCP(0, serverFactory, interface="127.0.0.1")
self.addCleanup(port.stopListening)
portNumber = port.getHost().port
clientF = MyClientFactory()
clientConnMade = defer.Deferred()
clientF.protocolConnectionMade = clientConnMade
reactor.connectTCP("127.0.0.1", portNumber, clientF)
connsMade = defer.gatherResults([serverConnMade, clientConnMade])
def connected(result):
serverProtocol, clientProtocol = result
callback(serverProtocol, clientProtocol)
serverProtocol.transport.loseConnection()
clientProtocol.transport.loseConnection()
connsMade.addCallback(connected)
return connsMade
def test_tcpNoDelay(self):
"""
The transport of a protocol connected with L{IReactorTCP.connectTCP} or
L{IReactor.TCP.listenTCP} can have its I{TCP_NODELAY} state inspected
and manipulated with L{ITCPTransport.getTcpNoDelay} and
L{ITCPTransport.setTcpNoDelay}.
"""
def check(serverProtocol, clientProtocol):
for p in [serverProtocol, clientProtocol]:
transport = p.transport
self.assertEqual(transport.getTcpNoDelay(), 0)
transport.setTcpNoDelay(1)
self.assertEqual(transport.getTcpNoDelay(), 1)
transport.setTcpNoDelay(0)
self.assertEqual(transport.getTcpNoDelay(), 0)
return self._connectedClientAndServerTest(check)
def test_tcpKeepAlive(self):
"""
The transport of a protocol connected with L{IReactorTCP.connectTCP} or
L{IReactor.TCP.listenTCP} can have its I{SO_KEEPALIVE} state inspected
and manipulated with L{ITCPTransport.getTcpKeepAlive} and
L{ITCPTransport.setTcpKeepAlive}.
"""
def check(serverProtocol, clientProtocol):
for p in [serverProtocol, clientProtocol]:
transport = p.transport
self.assertEqual(transport.getTcpKeepAlive(), 0)
transport.setTcpKeepAlive(1)
self.assertEqual(transport.getTcpKeepAlive(), 1)
transport.setTcpKeepAlive(0)
self.assertEqual(transport.getTcpKeepAlive(), 0)
return self._connectedClientAndServerTest(check)
def testFailing(self):
clientF = MyClientFactory()
# XXX we assume no one is listening on TCP port 69
reactor.connectTCP("127.0.0.1", 69, clientF, timeout=5)
def check(ignored):
clientF.reason.trap(error.ConnectionRefusedError)
return clientF.failDeferred.addCallback(check)
def test_connectionRefusedErrorNumber(self):
"""
Assert that the error number of the ConnectionRefusedError is
ECONNREFUSED, and not some other socket related error.
"""
# Bind a number of ports in the operating system. We will attempt
# to connect to these in turn immediately after closing them, in the
# hopes that no one else has bound them in the mean time. Any
# connection which succeeds is ignored and causes us to move on to
# the next port. As soon as a connection attempt fails, we move on
# to making an assertion about how it failed. If they all succeed,
# the test will fail.
# It would be nice to have a simpler, reliable way to cause a
# connection failure from the platform.
#
# On Linux (2.6.15), connecting to port 0 always fails. FreeBSD
# (5.4) rejects the connection attempt with EADDRNOTAVAIL.
#
# On FreeBSD (5.4), listening on a port and then repeatedly
# connecting to it without ever accepting any connections eventually
# leads to an ECONNREFUSED. On Linux (2.6.15), a seemingly
# unbounded number of connections succeed.
serverSockets = []
for i in range(10):
serverSocket = socket.socket()
serverSocket.bind(("127.0.0.1", 0))
serverSocket.listen(1)
serverSockets.append(serverSocket)
random.shuffle(serverSockets)
clientCreator = protocol.ClientCreator(reactor, protocol.Protocol)
def tryConnectFailure():
def connected(proto):
"""
Darn. Kill it and try again, if there are any tries left.
"""
proto.transport.loseConnection()
if serverSockets:
return tryConnectFailure()
self.fail(
"Could not fail to connect - could not test errno for that case."
)
serverSocket = serverSockets.pop()
serverHost, serverPort = serverSocket.getsockname()
serverSocket.close()
connectDeferred = clientCreator.connectTCP(serverHost, serverPort)
connectDeferred.addCallback(connected)
return connectDeferred
refusedDeferred = tryConnectFailure()
self.assertFailure(refusedDeferred, error.ConnectionRefusedError)
def connRefused(exc):
self.assertEqual(exc.osError, errno.ECONNREFUSED)
refusedDeferred.addCallback(connRefused)
def cleanup(passthrough):
while serverSockets:
serverSockets.pop().close()
return passthrough
refusedDeferred.addBoth(cleanup)
return refusedDeferred
def test_connectByServiceFail(self):
"""
Connecting to a named service which does not exist raises
L{error.ServiceNameUnknownError}.
"""
self.assertRaises(
error.ServiceNameUnknownError,
reactor.connectTCP,
"127.0.0.1",
"thisbetternotexist",
MyClientFactory(),
)
def test_connectByService(self):
"""
L{IReactorTCP.connectTCP} accepts the name of a service instead of a
port number and connects to the port number associated with that
service, as defined by L{socket.getservbyname}.
"""
serverFactory = MyServerFactory()
serverConnMade = defer.Deferred()
serverFactory.protocolConnectionMade = serverConnMade
port = reactor.listenTCP(0, serverFactory, interface="127.0.0.1")
self.addCleanup(port.stopListening)
portNumber = port.getHost().port
clientFactory = MyClientFactory()
clientConnMade = defer.Deferred()
clientFactory.protocolConnectionMade = clientConnMade
def fakeGetServicePortByName(serviceName, protocolName):
if serviceName == "http" and protocolName == "tcp":
return portNumber
return 10
self.patch(socket, "getservbyname", fakeGetServicePortByName)
reactor.connectTCP("127.0.0.1", "http", clientFactory)
connMade = defer.gatherResults([serverConnMade, clientConnMade])
def connected(result):
serverProtocol, clientProtocol = result
self.assertTrue(
serverFactory.called,
"Server factory was not called upon to build a protocol.",
)
serverProtocol.transport.loseConnection()
clientProtocol.transport.loseConnection()
connMade.addCallback(connected)
return connMade
class StartStopFactory(protocol.Factory):
started = 0
stopped = 0
def startFactory(self):
if self.started or self.stopped:
raise RuntimeError
self.started = 1
def stopFactory(self):
if not self.started or self.stopped:
raise RuntimeError
self.stopped = 1
class ClientStartStopFactory(MyClientFactory):
started = 0
stopped = 0
def __init__(self, *a, **kw):
MyClientFactory.__init__(self, *a, **kw)
self.whenStopped = defer.Deferred()
def startFactory(self):
if self.started or self.stopped:
raise RuntimeError
self.started = 1
def stopFactory(self):
if not self.started or self.stopped:
raise RuntimeError
self.stopped = 1
self.whenStopped.callback(True)
class FactoryTests(TestCase):
"""Tests for factories."""
def test_serverStartStop(self):
"""
The factory passed to L{IReactorTCP.listenTCP} should be started only
when it transitions from being used on no ports to being used on one
port and should be stopped only when it transitions from being used on
one port to being used on no ports.
"""
# Note - this test doesn't need to use listenTCP. It is exercising
# logic implemented in Factory.doStart and Factory.doStop, so it could
# just call that directly. Some other test can make sure that
# listenTCP and stopListening correctly call doStart and
# doStop. -exarkun
f = StartStopFactory()
# listen on port
p1 = reactor.listenTCP(0, f, interface="127.0.0.1")
self.addCleanup(p1.stopListening)
self.assertEqual((f.started, f.stopped), (1, 0))
# listen on two more ports
p2 = reactor.listenTCP(0, f, interface="127.0.0.1")
p3 = reactor.listenTCP(0, f, interface="127.0.0.1")
self.assertEqual((f.started, f.stopped), (1, 0))
# close two ports
d1 = defer.maybeDeferred(p1.stopListening)
d2 = defer.maybeDeferred(p2.stopListening)
closedDeferred = defer.gatherResults([d1, d2])
def cbClosed(ignored):
self.assertEqual((f.started, f.stopped), (1, 0))
# Close the last port
return p3.stopListening()
closedDeferred.addCallback(cbClosed)
def cbClosedAll(ignored):
self.assertEqual((f.started, f.stopped), (1, 1))
closedDeferred.addCallback(cbClosedAll)
return closedDeferred
def test_clientStartStop(self):
"""
The factory passed to L{IReactorTCP.connectTCP} should be started when
the connection attempt starts and stopped when it is over.
"""
f = ClosingFactory()
p = reactor.listenTCP(0, f, interface="127.0.0.1")
f.port = p
self.addCleanup(f.cleanUp)
portNumber = p.getHost().port
factory = ClientStartStopFactory()
reactor.connectTCP("127.0.0.1", portNumber, factory)
self.assertTrue(factory.started)
return loopUntil(lambda: factory.stopped)
class CannotBindTests(TestCase):
"""
Tests for correct behavior when a reactor cannot bind to the required TCP
port.
"""
def test_cannotBind(self):
"""
L{IReactorTCP.listenTCP} raises L{error.CannotListenError} if the
address to listen on is already in use.
"""
f = MyServerFactory()
p1 = reactor.listenTCP(0, f, interface="127.0.0.1")
self.addCleanup(p1.stopListening)
n = p1.getHost().port
dest = p1.getHost()
self.assertEqual(dest.type, "TCP")
self.assertEqual(dest.host, "127.0.0.1")
self.assertEqual(dest.port, n)
# make sure new listen raises error
self.assertRaises(
error.CannotListenError, reactor.listenTCP, n, f, interface="127.0.0.1"
)
def _fireWhenDoneFunc(self, d, f):
"""Returns closure that when called calls f and then callbacks d."""
@wraps(f)
def newf(*args, **kw):
rtn = f(*args, **kw)
d.callback("")
return rtn
return newf
def test_clientBind(self):
"""
L{IReactorTCP.connectTCP} calls C{Factory.clientConnectionFailed} with
L{error.ConnectBindError} if the bind address specified is already in
use.
"""
theDeferred = defer.Deferred()
sf = MyServerFactory()
sf.startFactory = self._fireWhenDoneFunc(theDeferred, sf.startFactory)
p = reactor.listenTCP(0, sf, interface="127.0.0.1")
self.addCleanup(p.stopListening)
def _connect1(results):
d = defer.Deferred()
cf1 = MyClientFactory()
cf1.buildProtocol = self._fireWhenDoneFunc(d, cf1.buildProtocol)
reactor.connectTCP(
"127.0.0.1", p.getHost().port, cf1, bindAddress=("127.0.0.1", 0)
)
d.addCallback(_conmade, cf1)
return d
def _conmade(results, cf1):
d = defer.Deferred()
cf1.protocol.connectionMade = self._fireWhenDoneFunc(
d, cf1.protocol.connectionMade
)
d.addCallback(_check1connect2, cf1)
return d
def _check1connect2(results, cf1):
self.assertEqual(cf1.protocol.made, 1)
d1 = defer.Deferred()
d2 = defer.Deferred()
port = cf1.protocol.transport.getHost().port
cf2 = MyClientFactory()
cf2.clientConnectionFailed = self._fireWhenDoneFunc(
d1, cf2.clientConnectionFailed
)
cf2.stopFactory = self._fireWhenDoneFunc(d2, cf2.stopFactory)
reactor.connectTCP(
"127.0.0.1", p.getHost().port, cf2, bindAddress=("127.0.0.1", port)
)
d1.addCallback(_check2failed, cf1, cf2)
d2.addCallback(_check2stopped, cf1, cf2)
dl = defer.DeferredList([d1, d2])
dl.addCallback(_stop, cf1, cf2)
return dl
def _check2failed(results, cf1, cf2):
self.assertEqual(cf2.failed, 1)
cf2.reason.trap(error.ConnectBindError)
self.assertTrue(cf2.reason.check(error.ConnectBindError))
return results
def _check2stopped(results, cf1, cf2):
self.assertEqual(cf2.stopped, 1)
return results
def _stop(results, cf1, cf2):
d = defer.Deferred()
d.addCallback(_check1cleanup, cf1)
cf1.stopFactory = self._fireWhenDoneFunc(d, cf1.stopFactory)
cf1.protocol.transport.loseConnection()
return d
def _check1cleanup(results, cf1):
self.assertEqual(cf1.stopped, 1)
theDeferred.addCallback(_connect1)
return theDeferred
class MyOtherClientFactory(protocol.ClientFactory):
def buildProtocol(self, address):
self.address = address
self.protocol = AccumulatingProtocol()
return self.protocol
class LocalRemoteAddressTests(TestCase):
"""
Tests for correct getHost/getPeer values and that the correct address is
passed to buildProtocol.
"""
def test_hostAddress(self):
"""
L{IListeningPort.getHost} returns the same address as a client
connection's L{ITCPTransport.getPeer}.
"""
serverFactory = MyServerFactory()
serverFactory.protocolConnectionLost = defer.Deferred()
serverConnectionLost = serverFactory.protocolConnectionLost
port = reactor.listenTCP(0, serverFactory, interface="127.0.0.1")
self.addCleanup(port.stopListening)
n = port.getHost().port
clientFactory = MyClientFactory()
onConnection = clientFactory.protocolConnectionMade = defer.Deferred()
connector = reactor.connectTCP("127.0.0.1", n, clientFactory)
def check(ignored):
self.assertEqual([port.getHost()], clientFactory.peerAddresses)
self.assertEqual(port.getHost(), clientFactory.protocol.transport.getPeer())
onConnection.addCallback(check)
def cleanup(ignored):
# Clean up the client explicitly here so that tear down of
# the server side of the connection begins, then wait for
# the server side to actually disconnect.
connector.disconnect()
return serverConnectionLost
onConnection.addCallback(cleanup)
return onConnection
class WriterProtocol(protocol.Protocol):
def connectionMade(self):
# use everything ITransport claims to provide. If something here
# fails, the exception will be written to the log, but it will not
# directly flunk the test. The test will fail when maximum number of
# iterations have passed and the writer's factory.done has not yet
# been set.
self.transport.write(b"Hello Cleveland!\n")
seq = [b"Goodbye", b" cruel", b" world", b"\n"]
self.transport.writeSequence(seq)
peer = self.transport.getPeer()
if peer.type != "TCP":
msg(f"getPeer returned non-TCP socket: {peer}")
self.factory.problem = 1
us = self.transport.getHost()
if us.type != "TCP":
msg(f"getHost returned non-TCP socket: {us}")
self.factory.problem = 1
self.factory.done = 1
self.transport.loseConnection()
class ReaderProtocol(protocol.Protocol):
def dataReceived(self, data):
self.factory.data += data
def connectionLost(self, reason):
self.factory.done = 1
class WriterClientFactory(protocol.ClientFactory):
def __init__(self):
self.done = 0
self.data = b""
def buildProtocol(self, addr):
p = ReaderProtocol()
p.factory = self
self.protocol = p
return p
class WriteDataTests(TestCase):
"""
Test that connected TCP sockets can actually write data. Try to exercise
the entire ITransport interface.
"""
def test_writer(self):
"""
L{ITCPTransport.write} and L{ITCPTransport.writeSequence} send bytes to
the other end of the connection.
"""
f = protocol.Factory()
f.protocol = WriterProtocol
f.done = 0
f.problem = 0
wrappedF = WiredFactory(f)
p = reactor.listenTCP(0, wrappedF, interface="127.0.0.1")
self.addCleanup(p.stopListening)
n = p.getHost().port
clientF = WriterClientFactory()
wrappedClientF = WiredFactory(clientF)
reactor.connectTCP("127.0.0.1", n, wrappedClientF)
def check(ignored):
self.assertTrue(f.done, "writer didn't finish, it probably died")
self.assertTrue(f.problem == 0, "writer indicated an error")
self.assertTrue(clientF.done, "client didn't see connection dropped")
expected = b"".join(
[b"Hello Cleveland!\n", b"Goodbye", b" cruel", b" world", b"\n"]
)
self.assertTrue(
clientF.data == expected,
"client didn't receive all the data it expected",
)
d = defer.gatherResults([wrappedF.onDisconnect, wrappedClientF.onDisconnect])
return d.addCallback(check)
def test_writeAfterShutdownWithoutReading(self):
"""
A TCP transport which is written to after the connection has been shut
down should notify its protocol that the connection has been lost, even
if the TCP transport is not actively being monitored for read events
(ie, pauseProducing was called on it).
"""
# This is an unpleasant thing. Generally tests shouldn't skip or
# run based on the name of the reactor being used (most tests
# shouldn't care _at all_ what reactor is being used, in fact). The
# IOCP reactor cannot pass this test, though -- please see the skip
# reason below for details.
if reactor.__class__.__name__ == "IOCPReactor":
raise SkipTest(
"iocpreactor does not, in fact, stop reading immediately "
"after pauseProducing is called. This results in a "
"bonus disconnection notification. Under some "
"circumstances, it might be possible to not receive "
"this notifications (specifically, pauseProducing, "
"deliver some data, proceed with this test). "
)
# Called back after the protocol for the client side of the connection
# has paused its transport, preventing it from reading, therefore
# preventing it from noticing the disconnection before the rest of the
# actions which are necessary to trigger the case this test is for have
# been taken.
clientPaused = defer.Deferred()
# Called back when the protocol for the server side of the connection
# has received connection lost notification.
serverLost = defer.Deferred()
class Disconnecter(protocol.Protocol):
"""
Protocol for the server side of the connection which disconnects
itself in a callback on clientPaused and publishes notification
when its connection is actually lost.
"""
def connectionMade(self):
"""
Set up a callback on clientPaused to lose the connection.
"""
msg("Disconnector.connectionMade")
def disconnect(ignored):
msg("Disconnector.connectionMade disconnect")
self.transport.loseConnection()
msg("loseConnection called")
clientPaused.addCallback(disconnect)
def connectionLost(self, reason):
"""
Notify observers that the server side of the connection has
ended.
"""
msg("Disconnecter.connectionLost")
serverLost.callback(None)
msg("serverLost called back")
# Create the server port to which a connection will be made.
server = protocol.ServerFactory()
server.protocol = Disconnecter
port = reactor.listenTCP(0, server, interface="127.0.0.1")
self.addCleanup(port.stopListening)
addr = port.getHost()
@implementer(IPullProducer)
class Infinite:
"""
A producer which will write to its consumer as long as
resumeProducing is called.
@ivar consumer: The L{IConsumer} which will be written to.
"""
def __init__(self, consumer):
self.consumer = consumer
def resumeProducing(self):
msg("Infinite.resumeProducing")
self.consumer.write(b"x")
msg("Infinite.resumeProducing wrote to consumer")
def stopProducing(self):
msg("Infinite.stopProducing")
class UnreadingWriter(protocol.Protocol):
"""
Trivial protocol which pauses its transport immediately and then
writes some bytes to it.
"""
def connectionMade(self):
msg("UnreadingWriter.connectionMade")
self.transport.pauseProducing()
clientPaused.callback(None)
msg("clientPaused called back")
def write(ignored):
msg("UnreadingWriter.connectionMade write")
# This needs to be enough bytes to spill over into the
# userspace Twisted send buffer - if it all fits into
# the kernel, Twisted won't even poll for OUT events,
# which means it won't poll for any events at all, so
# the disconnection is never noticed. This is due to
# #1662. When #1662 is fixed, this test will likely
# need to be adjusted, otherwise connection lost
# notification will happen too soon and the test will
# probably begin to fail with ConnectionDone instead of
# ConnectionLost (in any case, it will no longer be
# entirely correct).
producer = Infinite(self.transport)
msg("UnreadingWriter.connectionMade write created producer")
self.transport.registerProducer(producer, False)
msg("UnreadingWriter.connectionMade write registered producer")
serverLost.addCallback(write)
# Create the client and initiate the connection
client = MyClientFactory()
client.protocolFactory = UnreadingWriter
clientConnectionLost = client.deferred
def cbClientLost(ignored):
msg("cbClientLost")
return client.lostReason
clientConnectionLost.addCallback(cbClientLost)
msg(f"Connecting to {addr.host}:{addr.port}")
reactor.connectTCP(addr.host, addr.port, client)
# By the end of the test, the client should have received notification
# of unclean disconnection.
msg("Returning Deferred")
return self.assertFailure(clientConnectionLost, error.ConnectionLost)
class ConnectionLosingProtocol(protocol.Protocol):
def connectionMade(self):
self.transport.write(b"1")
self.transport.loseConnection()
self.master._connectionMade()
self.master.ports.append(self.transport)
class NoopProtocol(protocol.Protocol):
def connectionMade(self):
self.d = defer.Deferred()
self.master.serverConns.append(self.d)
def connectionLost(self, reason):
self.d.callback(True)
class ConnectionLostNotifyingProtocol(protocol.Protocol):
"""
Protocol which fires a Deferred which was previously passed to
its initializer when the connection is lost.
@ivar onConnectionLost: The L{Deferred} which will be fired in
C{connectionLost}.
@ivar lostConnectionReason: L{None} until the connection is lost, then a
reference to the reason passed to C{connectionLost}.
"""
def __init__(self, onConnectionLost):
self.lostConnectionReason = None
self.onConnectionLost = onConnectionLost
def connectionLost(self, reason):
self.lostConnectionReason = reason
self.onConnectionLost.callback(self)
class HandleSavingProtocol(ConnectionLostNotifyingProtocol):
"""
Protocol which grabs the platform-specific socket handle and
saves it as an attribute on itself when the connection is
established.
"""
def makeConnection(self, transport):
"""
Save the platform-specific socket handle for future
introspection.
"""
self.handle = transport.getHandle()
return protocol.Protocol.makeConnection(self, transport)
class ProperlyCloseFilesMixin:
"""
Tests for platform resources properly being cleaned up.
"""
def createServer(self, address, portNumber, factory):
"""
Bind a server port to which connections will be made. The server
should use the given protocol factory.
@return: The L{IListeningPort} for the server created.
"""
raise NotImplementedError()
def connectClient(self, address, portNumber, clientCreator):
"""
Establish a connection to the given address using the given
L{ClientCreator} instance.
@return: A Deferred which will fire with the connected protocol instance.
"""
raise NotImplementedError()
def getHandleExceptionType(self):
"""
Return the exception class which will be raised when an operation is
attempted on a closed platform handle.
"""
raise NotImplementedError()
def getHandleErrorCodeMatcher(self):
"""
Return a L{hamcrest.core.matcher.Matcher} that matches the
errno expected to result from writing to a closed platform
socket handle.
"""
# Windows: returns WSAENOTSOCK
# Linux, FreeBSD, macOS: returns EBADF
if platform.isWindows():
return hamcrest.equal_to(errno.WSAENOTSOCK)
return hamcrest.equal_to(errno.EBADF)
def test_properlyCloseFiles(self):
"""
Test that lost connections properly have their underlying socket
resources cleaned up.
"""
onServerConnectionLost = defer.Deferred()
serverFactory = protocol.ServerFactory()
serverFactory.protocol = lambda: ConnectionLostNotifyingProtocol(
onServerConnectionLost
)
serverPort = self.createServer("127.0.0.1", 0, serverFactory)
onClientConnectionLost = defer.Deferred()
serverAddr = serverPort.getHost()
clientCreator = protocol.ClientCreator(
reactor, lambda: HandleSavingProtocol(onClientConnectionLost)
)
clientDeferred = self.connectClient(
serverAddr.host, serverAddr.port, clientCreator
)
def clientConnected(client):
"""
Disconnect the client. Return a Deferred which fires when both
the client and the server have received disconnect notification.
"""
client.transport.write(b"some bytes to make sure the connection is set up")
client.transport.loseConnection()
return defer.gatherResults([onClientConnectionLost, onServerConnectionLost])
clientDeferred.addCallback(clientConnected)
def clientDisconnected(result):
"""
Verify that the underlying platform socket handle has been
cleaned up.
"""
client, server = result
if not client.lostConnectionReason.check(error.ConnectionClosed):
err(
client.lostConnectionReason,
"Client lost connection for unexpected reason",
)
if not server.lostConnectionReason.check(error.ConnectionClosed):
err(
server.lostConnectionReason,
"Server lost connection for unexpected reason",
)
errorCodeMatcher = self.getHandleErrorCodeMatcher()
exception = self.assertRaises(
self.getHandleExceptionType(), client.handle.send, b"bytes"
)
hamcrest.assert_that(
exception.args[0],
errorCodeMatcher,
)
clientDeferred.addCallback(clientDisconnected)
def cleanup(passthrough):
"""
Shut down the server port. Return a Deferred which fires when
this has completed.
"""
result = defer.maybeDeferred(serverPort.stopListening)
result.addCallback(lambda ign: passthrough)
return result
clientDeferred.addBoth(cleanup)
return clientDeferred
class ProperlyCloseFilesTests(TestCase, ProperlyCloseFilesMixin):
"""
Test that the sockets created by L{IReactorTCP.connectTCP} are cleaned up
when the connection they are associated with is closed.
"""
def createServer(self, address, portNumber, factory):
"""
Create a TCP server using L{IReactorTCP.listenTCP}.
"""
return reactor.listenTCP(portNumber, factory, interface=address)
def connectClient(self, address, portNumber, clientCreator):
"""
Create a TCP client using L{IReactorTCP.connectTCP}.
"""
return clientCreator.connectTCP(address, portNumber)
def getHandleExceptionType(self):
"""
Return L{socket.error} as the expected error type which will be
raised by a write to the low-level socket object after it has been
closed.
"""
return socket.error
class WiredForDeferreds(policies.ProtocolWrapper):
def __init__(self, factory, wrappedProtocol):
policies.ProtocolWrapper.__init__(self, factory, wrappedProtocol)
def connectionMade(self):
policies.ProtocolWrapper.connectionMade(self)
self.factory.onConnect.callback(None)
def connectionLost(self, reason):
policies.ProtocolWrapper.connectionLost(self, reason)
self.factory.onDisconnect.callback(None)
class WiredFactory(policies.WrappingFactory):
protocol = WiredForDeferreds
def __init__(self, wrappedFactory):
policies.WrappingFactory.__init__(self, wrappedFactory)
self.onConnect = defer.Deferred()
self.onDisconnect = defer.Deferred()
class AddressTests(TestCase):
"""
Tests for address-related interactions with client and server protocols.
"""
def setUp(self):
"""
Create a port and connected client/server pair which can be used
to test factory behavior related to addresses.
@return: A L{defer.Deferred} which will be called back when both the
client and server protocols have received their connection made
callback.
"""
class RememberingWrapper(protocol.ClientFactory):
"""
Simple wrapper factory which records the addresses which are
passed to its L{buildProtocol} method and delegates actual
protocol creation to another factory.
@ivar addresses: A list of the objects passed to buildProtocol.
@ivar factory: The wrapped factory to which protocol creation is
delegated.
"""
def __init__(self, factory):
self.addresses = []
self.factory = factory
# Only bother to pass on buildProtocol calls to the wrapped
# factory - doStart, doStop, etc aren't necessary for this test
# to pass.
def buildProtocol(self, addr):
"""
Append the given address to C{self.addresses} and forward
the call to C{self.factory}.
"""
self.addresses.append(addr)
return self.factory.buildProtocol(addr)
# Make a server which we can receive connection and disconnection
# notification for, and which will record the address passed to its
# buildProtocol.
self.server = MyServerFactory()
self.serverConnMade = self.server.protocolConnectionMade = defer.Deferred()
self.serverConnLost = self.server.protocolConnectionLost = defer.Deferred()
# RememberingWrapper is a ClientFactory, but ClientFactory is-a
# ServerFactory, so this is okay.
self.serverWrapper = RememberingWrapper(self.server)
# Do something similar for a client.
self.client = MyClientFactory()
self.clientConnMade = self.client.protocolConnectionMade = defer.Deferred()
self.clientConnLost = self.client.protocolConnectionLost = defer.Deferred()
self.clientWrapper = RememberingWrapper(self.client)
self.port = reactor.listenTCP(0, self.serverWrapper, interface="127.0.0.1")
self.connector = reactor.connectTCP(
self.port.getHost().host, self.port.getHost().port, self.clientWrapper
)
return defer.gatherResults([self.serverConnMade, self.clientConnMade])
def tearDown(self):
"""
Disconnect the client/server pair and shutdown the port created in
L{setUp}.
"""
self.connector.disconnect()
return defer.gatherResults(
[
self.serverConnLost,
self.clientConnLost,
defer.maybeDeferred(self.port.stopListening),
]
)
def test_buildProtocolClient(self):
"""
L{ClientFactory.buildProtocol} should be invoked with the address of
the server to which a connection has been established, which should
be the same as the address reported by the C{getHost} method of the
transport of the server protocol and as the C{getPeer} method of the
transport of the client protocol.
"""
serverHost = self.server.protocol.transport.getHost()
clientPeer = self.client.protocol.transport.getPeer()
self.assertEqual(
self.clientWrapper.addresses,
[IPv4Address("TCP", serverHost.host, serverHost.port)],
)
self.assertEqual(
self.clientWrapper.addresses,
[IPv4Address("TCP", clientPeer.host, clientPeer.port)],
)
class LargeBufferWriterProtocol(protocol.Protocol):
# Win32 sockets cannot handle single huge chunks of bytes. Write one
# massive string to make sure Twisted deals with this fact. Immediately
# follow that with another write to test behaviour under load (see issue
# #9446)
def connectionMade(self):
self.transport.write(b"X" * (self.factory.len - 1))
def finish():
self.transport.write(b"X")
self.factory.done = 1
self.transport.loseConnection()
reactor.callLater(0.001, finish)
class LargeBufferReaderProtocol(protocol.Protocol):
def dataReceived(self, data):
self.factory.len += len(data)
def connectionLost(self, reason):
self.factory.done = 1
class LargeBufferReaderClientFactory(protocol.ClientFactory):
def __init__(self):
self.done = 0
self.len = 0
def buildProtocol(self, addr):
p = LargeBufferReaderProtocol()
p.factory = self
self.protocol = p
return p
class FireOnClose(policies.ProtocolWrapper):
"""A wrapper around a protocol that makes it fire a deferred when
connectionLost is called.
"""
def connectionLost(self, reason):
policies.ProtocolWrapper.connectionLost(self, reason)
self.factory.deferred.callback(None)
class FireOnCloseFactory(policies.WrappingFactory):
protocol = FireOnClose
def __init__(self, wrappedFactory):
policies.WrappingFactory.__init__(self, wrappedFactory)
self.deferred = defer.Deferred()
class LargeBufferTests(TestCase):
"""Test that buffering large amounts of data works."""
datalen = 60 * 1024 * 1024
def testWriter(self):
f = protocol.Factory()
f.protocol = LargeBufferWriterProtocol
f.done = 0
f.problem = 0
f.len = self.datalen
wrappedF = FireOnCloseFactory(f)
p = reactor.listenTCP(0, wrappedF, interface="127.0.0.1")
self.addCleanup(p.stopListening)
n = p.getHost().port
clientF = LargeBufferReaderClientFactory()
wrappedClientF = FireOnCloseFactory(clientF)
reactor.connectTCP("127.0.0.1", n, wrappedClientF)
d = defer.gatherResults([wrappedF.deferred, wrappedClientF.deferred])
def check(ignored):
self.assertTrue(f.done, "writer didn't finish, it probably died")
self.assertTrue(
clientF.len >= self.datalen,
"client didn't receive all the data it expected "
"(%d != %d)" % (clientF.len, self.datalen),
)
self.assertTrue(
clientF.len <= self.datalen,
"client did receive more data than it expected "
"(%d != %d)" % (clientF.len, self.datalen),
)
self.assertTrue(clientF.done, "client didn't see connection dropped")
return d.addCallback(check)
@implementer(IHalfCloseableProtocol)
class MyHCProtocol(AccumulatingProtocol):
readHalfClosed = False
writeHalfClosed = False
def readConnectionLost(self):
self.readHalfClosed = True
# Invoke notification logic from the base class to simplify testing.
if self.writeHalfClosed:
self.connectionLost(None)
def writeConnectionLost(self):
self.writeHalfClosed = True
# Invoke notification logic from the base class to simplify testing.
if self.readHalfClosed:
self.connectionLost(None)
class MyHCFactory(protocol.ServerFactory):
called = 0
protocolConnectionMade = None
def buildProtocol(self, addr):
self.called += 1
p = MyHCProtocol()
p.factory = self
self.protocol = p
return p
class HalfCloseTests(TestCase):
"""Test half-closing connections."""
def setUp(self):
self.f = f = MyHCFactory()
self.p = p = reactor.listenTCP(0, f, interface="127.0.0.1")
self.addCleanup(p.stopListening)
d = loopUntil(lambda: p.connected)
self.cf = protocol.ClientCreator(reactor, MyHCProtocol)
d.addCallback(lambda _: self.cf.connectTCP(p.getHost().host, p.getHost().port))
d.addCallback(self._setUp)
return d
def _setUp(self, client):
self.client = client
self.clientProtoConnectionLost = self.client.closedDeferred = defer.Deferred()
self.assertEqual(self.client.transport.connected, 1)
# Wait for the server to notice there is a connection, too.
return loopUntil(lambda: getattr(self.f, "protocol", None) is not None)
def tearDown(self):
self.assertEqual(self.client.closed, 0)
self.client.transport.loseConnection()
d = defer.maybeDeferred(self.p.stopListening)
d.addCallback(lambda ign: self.clientProtoConnectionLost)
d.addCallback(self._tearDown)
return d
def _tearDown(self, ignored):
self.assertEqual(self.client.closed, 1)
# because we did half-close, the server also needs to
# closed explicitly.
self.assertEqual(self.f.protocol.closed, 0)
d = defer.Deferred()
def _connectionLost(reason):
self.f.protocol.closed = 1
d.callback(None)
self.f.protocol.connectionLost = _connectionLost
self.f.protocol.transport.loseConnection()
d.addCallback(lambda x: self.assertEqual(self.f.protocol.closed, 1))
return d
def testCloseWriteCloser(self):
client = self.client
f = self.f
t = client.transport
t.write(b"hello")
d = loopUntil(lambda: len(t._tempDataBuffer) == 0)
def loseWrite(ignored):
t.loseWriteConnection()
return loopUntil(lambda: t._writeDisconnected)
def check(ignored):
self.assertFalse(client.closed)
self.assertTrue(client.writeHalfClosed)
self.assertFalse(client.readHalfClosed)
return loopUntil(lambda: f.protocol.readHalfClosed)
def write(ignored):
w = client.transport.write
w(b" world")
w(b"lalala fooled you")
self.assertEqual(0, len(client.transport._tempDataBuffer))
self.assertEqual(f.protocol.data, b"hello")
self.assertFalse(f.protocol.closed)
self.assertTrue(f.protocol.readHalfClosed)
return d.addCallback(loseWrite).addCallback(check).addCallback(write)
def testWriteCloseNotification(self):
f = self.f
f.protocol.transport.loseWriteConnection()
d = defer.gatherResults(
[
loopUntil(lambda: f.protocol.writeHalfClosed),
loopUntil(lambda: self.client.readHalfClosed),
]
)
d.addCallback(lambda _: self.assertEqual(f.protocol.readHalfClosed, False))
return d
class HalfCloseNoNotificationAndShutdownExceptionTests(TestCase):
def setUp(self):
self.f = f = MyServerFactory()
self.f.protocolConnectionMade = defer.Deferred()
self.p = p = reactor.listenTCP(0, f, interface="127.0.0.1")
# XXX we don't test server side yet since we don't do it yet
d = protocol.ClientCreator(reactor, AccumulatingProtocol).connectTCP(
p.getHost().host, p.getHost().port
)
d.addCallback(self._gotClient)
return d
def _gotClient(self, client):
self.client = client
# Now wait for the server to catch up - it doesn't matter if this
# Deferred has already fired and gone away, in that case we'll
# return None and not wait at all, which is precisely correct.
return self.f.protocolConnectionMade
def tearDown(self):
self.client.transport.loseConnection()
return self.p.stopListening()
def testNoNotification(self):
"""
TCP protocols support half-close connections, but not all of them
support being notified of write closes. In this case, test that
half-closing the connection causes the peer's connection to be
closed.
"""
self.client.transport.write(b"hello")
self.client.transport.loseWriteConnection()
self.f.protocol.closedDeferred = d = defer.Deferred()
self.client.closedDeferred = d2 = defer.Deferred()
d.addCallback(lambda x: self.assertEqual(self.f.protocol.data, b"hello"))
d.addCallback(lambda x: self.assertTrue(self.f.protocol.closed))
return defer.gatherResults([d, d2])
def testShutdownException(self):
"""
If the other side has already closed its connection,
loseWriteConnection should pass silently.
"""
self.f.protocol.transport.loseConnection()
self.client.transport.write(b"X")
self.client.transport.loseWriteConnection()
self.f.protocol.closedDeferred = d = defer.Deferred()
self.client.closedDeferred = d2 = defer.Deferred()
d.addCallback(lambda x: self.assertTrue(self.f.protocol.closed))
return defer.gatherResults([d, d2])
class HalfCloseBuggyApplicationTests(TestCase):
"""
Test half-closing connections where notification code has bugs.
"""
def setUp(self):
"""
Set up a server and connect a client to it. Return a Deferred which
only fires once this is done.
"""
self.serverFactory = MyHCFactory()
self.serverFactory.protocolConnectionMade = defer.Deferred()
self.port = reactor.listenTCP(0, self.serverFactory, interface="127.0.0.1")
self.addCleanup(self.port.stopListening)
addr = self.port.getHost()
creator = protocol.ClientCreator(reactor, MyHCProtocol)
clientDeferred = creator.connectTCP(addr.host, addr.port)
def setClient(clientProtocol):
self.clientProtocol = clientProtocol
clientDeferred.addCallback(setClient)
return defer.gatherResults(
[self.serverFactory.protocolConnectionMade, clientDeferred]
)
def aBug(self, *args):
"""
Fake implementation of a callback which illegally raises an
exception.
"""
raise RuntimeError("ONO I AM BUGGY CODE")
def _notificationRaisesTest(self):
"""
Helper for testing that an exception is logged by the time the
client protocol loses its connection.
"""
closed = self.clientProtocol.closedDeferred = defer.Deferred()
self.clientProtocol.transport.loseWriteConnection()
def check(ignored):
errors = self.flushLoggedErrors(RuntimeError)
self.assertEqual(len(errors), 1)
closed.addCallback(check)
return closed
def test_readNotificationRaises(self):
"""
If C{readConnectionLost} raises an exception when the transport
calls it to notify the protocol of that event, the exception should
be logged and the protocol should be disconnected completely.
"""
self.serverFactory.protocol.readConnectionLost = self.aBug
return self._notificationRaisesTest()
def test_writeNotificationRaises(self):
"""
If C{writeConnectionLost} raises an exception when the transport
calls it to notify the protocol of that event, the exception should
be logged and the protocol should be disconnected completely.
"""
self.clientProtocol.writeConnectionLost = self.aBug
return self._notificationRaisesTest()
class LogTests(TestCase):
"""
Test logging facility of TCP base classes.
"""
def test_logstrClientSetup(self):
"""
Check that the log customization of the client transport happens
once the client is connected.
"""
server = MyServerFactory()
client = MyClientFactory()
client.protocolConnectionMade = defer.Deferred()
port = reactor.listenTCP(0, server, interface="127.0.0.1")
self.addCleanup(port.stopListening)
connector = reactor.connectTCP(port.getHost().host, port.getHost().port, client)
self.addCleanup(connector.disconnect)
# It should still have the default value
self.assertEqual(connector.transport.logstr, "Uninitialized")
def cb(ign):
self.assertEqual(connector.transport.logstr, "AccumulatingProtocol,client")
client.protocolConnectionMade.addCallback(cb)
return client.protocolConnectionMade
class PauseProducingTests(TestCase):
"""
Test some behaviors of pausing the production of a transport.
"""
@skipIf(
not interfaces.IReactorFDSet.providedBy(reactor),
"Reactor not providing IReactorFDSet",
)
def test_pauseProducingInConnectionMade(self):
"""
In C{connectionMade} of a client protocol, C{pauseProducing} used to be
ignored: this test is here to ensure it's not ignored.
"""
server = MyServerFactory()
client = MyClientFactory()
client.protocolConnectionMade = defer.Deferred()
port = reactor.listenTCP(0, server, interface="127.0.0.1")
self.addCleanup(port.stopListening)
connector = reactor.connectTCP(port.getHost().host, port.getHost().port, client)
self.addCleanup(connector.disconnect)
def checkInConnectionMade(proto):
tr = proto.transport
# The transport should already be monitored
self.assertIn(tr, reactor.getReaders() + reactor.getWriters())
proto.transport.pauseProducing()
self.assertNotIn(tr, reactor.getReaders() + reactor.getWriters())
d = defer.Deferred()
d.addCallback(checkAfterConnectionMade)
reactor.callLater(0, d.callback, proto)
return d
def checkAfterConnectionMade(proto):
tr = proto.transport
# The transport should still not be monitored
self.assertNotIn(tr, reactor.getReaders() + reactor.getWriters())
client.protocolConnectionMade.addCallback(checkInConnectionMade)
return client.protocolConnectionMade
class CallBackOrderTests(TestCase):
"""
Test the order of reactor callbacks
"""
def test_loseOrder(self):
"""
Check that Protocol.connectionLost is called before factory's
clientConnectionLost
"""
server = MyServerFactory()
server.protocolConnectionMade = defer.Deferred().addCallback(
lambda proto: self.addCleanup(proto.transport.loseConnection)
)
client = MyClientFactory()
client.protocolConnectionLost = defer.Deferred()
client.protocolConnectionMade = defer.Deferred()
def _cbCM(res):
"""
protocol.connectionMade callback
"""
reactor.callLater(0, client.protocol.transport.loseConnection)
client.protocolConnectionMade.addCallback(_cbCM)
port = reactor.listenTCP(0, server, interface="127.0.0.1")
self.addCleanup(port.stopListening)
connector = reactor.connectTCP(port.getHost().host, port.getHost().port, client)
self.addCleanup(connector.disconnect)
def _cbCCL(res):
"""
factory.clientConnectionLost callback
"""
return "CCL"
def _cbCL(res):
"""
protocol.connectionLost callback
"""
return "CL"
def _cbGather(res):
self.assertEqual(res, ["CL", "CCL"])
d = defer.gatherResults(
[
client.protocolConnectionLost.addCallback(_cbCL),
client.deferred.addCallback(_cbCCL),
]
)
return d.addCallback(_cbGather)
try:
import resource
except ImportError:
pass
else:
numRounds = resource.getrlimit(resource.RLIMIT_NOFILE)[0] + 10
setattr(ProperlyCloseFilesTests, "numberRounds", numRounds)