Python twisted.internet.error.ConnectingCancelledError() Examples

def request_async(self, endpoint_name, endpoint_call_options, callback, cancellation_event):
        def async_request(endpoint_call_options, cancellation_event, callback):
            def manage_failures(failure):
                # Cancelled
                if failure.type == ConnectingCancelledError:
                    return
                elif failure.type == PubNubTwistedException:
                    callback(failure.value)
                else:
                    return failure

            def options_func():
                return endpoint_call_options

            request = self.request_deferred(options_func, cancellation_event)
            request.addCallbacks(callback, manage_failures)

        self.reactor.callLater(0, async_request, endpoint_call_options, cancellation_event, callback)

        return

    # REVIEW: cancellation_event doesn't used inside function 

def connect(self, protocolFactory):
        """
        Implement L{IStreamClientEndpoint.connect} to connect via a
        UNIX Socket
        """
        def _canceller(deferred):
            connector.stopConnecting()
            deferred.errback(
                error.ConnectingCancelledError(connector.getDestination()))

        try:
            wf = _WrappingFactory(protocolFactory, _canceller)
            connector = self._reactor.connectUNIX(
                self._path, wf,
                timeout=self._timeout,
                checkPID=self._checkPID)
            return wf._onConnection
        except:
            return defer.fail() 

def connect(self, protocolFactory):
        """
        Implement L{IStreamClientEndpoint.connect} to connect with SSL over
        TCP.
        """
        def _canceller(deferred):
            connector.stopConnecting()
            deferred.errback(
                error.ConnectingCancelledError(connector.getDestination()))

        try:
            wf = _WrappingFactory(protocolFactory, _canceller)
            connector = self._reactor.connectSSL(
                self._host, self._port, wf, self._sslContextFactory,
                timeout=self._timeout, bindAddress=self._bindAddress)
            return wf._onConnection
        except:
            return defer.fail() 

def test_connectionCancelledBeforeConnected(self):
        """
        If the connection is cancelled before it finishes connecting, the
        connection attempt is stopped.
        """
        endpoint = SSHCommandClientEndpoint.newConnection(
            self.reactor, b"/bin/ls -l", b"dummy user",
            self.hostname, self.port, knownHosts=self.knownHosts,
            ui=FixedResponseUI(False))

        factory = Factory()
        factory.protocol = Protocol
        d = endpoint.connect(factory)
        d.cancel()
        self.failureResultOf(d).trap(ConnectingCancelledError)
        self.assertTrue(self.reactor.connectors[0].stoppedConnecting) 

def connect(self, protocolFactory):
        """
        Implement L{IStreamClientEndpoint.connect} to connect via TCP.
        """
        def _canceller(deferred):
            connector.stopConnecting()
            deferred.errback(
                error.ConnectingCancelledError(connector.getDestination()))

        try:
            wf = _WrappingFactory(protocolFactory, _canceller)
            connector = self._reactor.connectTCP(
                self._host, self._port, wf,
                timeout=self._timeout, bindAddress=self._bindAddress)
            return wf._onConnection
        except:
            return defer.fail() 

def _canceller(self, deferred):
        """
        The outgoing connection attempt was cancelled.  Fail that L{Deferred}
        with an L{error.ConnectingCancelledError}.

        @param deferred: The L{Deferred <defer.Deferred>} that was cancelled;
            should be the same as C{self._onConnection}.
        @type deferred: L{Deferred <defer.Deferred>}

        @note: This relies on startedConnecting having been called, so it may
            seem as though there's a race condition where C{_connector} may not
            have been set.  However, using public APIs, this condition is
            impossible to catch, because a connection API
            (C{connectTCP}/C{SSL}/C{UNIX}) is always invoked before a
            L{_WrappingFactory}'s L{Deferred <defer.Deferred>} is returned to
            C{connect()}'s caller.

        @return: L{None}
        """
        deferred.errback(
            error.ConnectingCancelledError(
                self._connector.getDestination()))
        self._connector.stopConnecting() 

def _canceller(self, deferred):
        """
        The outgoing connection attempt was cancelled.  Fail that L{Deferred}
        with an L{error.ConnectingCancelledError}.

        @param deferred: The L{Deferred <defer.Deferred>} that was cancelled;
            should be the same as C{self._onConnection}.
        @type deferred: L{Deferred <defer.Deferred>}

        @note: This relies on startedConnecting having been called, so it may
            seem as though there's a race condition where C{_connector} may not
            have been set.  However, using public APIs, this condition is
            impossible to catch, because a connection API
            (C{connectTCP}/C{SSL}/C{UNIX}) is always invoked before a
            L{_WrappingFactory}'s L{Deferred <defer.Deferred>} is returned to
            C{connect()}'s caller.

        @return: L{None}
        """
        deferred.errback(
            error.ConnectingCancelledError(
                self._connector.getDestination()))
        self._connector.stopConnecting() 

def test_connectionCancelledBeforeConnected(self):
        """
        If the connection is cancelled before it finishes connecting, the
        connection attempt is stopped.
        """
        endpoint = SSHCommandClientEndpoint.newConnection(
            self.reactor, b"/bin/ls -l", b"dummy user",
            self.hostname, self.port, knownHosts=self.knownHosts,
            ui=FixedResponseUI(False))

        factory = Factory()
        factory.protocol = Protocol
        d = endpoint.connect(factory)
        d.cancel()
        self.failureResultOf(d).trap(ConnectingCancelledError)
        self.assertTrue(self.reactor.connectors[0].stoppedConnecting) 

def test_endpointConnectingCancelledAfterAllAttemptsStarted(self):
        """
        Calling L{Deferred.cancel} on the L{Deferred} returned from
        L{IStreamClientEndpoint.connect} after enough time has passed that all
        connection attempts have been initiated will cause it to be errbacked
        with a L{ConnectingCancelledError} exception.
        """
        oneBetween = endpoints.HostnameEndpoint._DEFAULT_ATTEMPT_DELAY
        advance = oneBetween + (oneBetween / 2.0)
        self.test_endpointConnectingCancelled(advance=advance) 

def test_endpointConnectingCancelled(self):
        """
        Calling L{Deferred.cancel} on the L{Deferred} returned from
        L{IStreamClientEndpoint.connect} is errbacked with an expected
        L{ConnectingCancelledError} exception.
        """
        mreactor = MemoryReactor()

        clientFactory = object()

        ep, ignoredArgs, address = self.createClientEndpoint(
            mreactor, clientFactory)

        d = ep.connect(clientFactory)

        receivedFailures = []

        def checkFailure(f):
            receivedFailures.append(f)

        d.addErrback(checkFailure)

        d.cancel()

        self.assertEquals(len(receivedFailures), 1)

        failure = receivedFailures[0]

        self.assertIsInstance(failure.value, error.ConnectingCancelledError)
        self.assertEquals(failure.value.address, address) 

def _schedule_connection(self, delay, h, is_relay):
        ep = endpoint_from_hint_obj(h, self._tor, self._reactor)
        desc = describe_hint_obj(h, is_relay, self._tor)
        d = deferLater(self._reactor, delay,
                       self._connect, ep, desc, is_relay)
        d.addErrback(lambda f: f.trap(ConnectingCancelledError,
                                      ConnectionRefusedError,
                                      CancelledError,
                                      ))
        # TODO: HostnameEndpoint.connect catches CancelledError and replaces
        # it with DNSLookupError. Remove this workaround when
        # https://twistedmatrix.com/trac/ticket/9696 is fixed.
        d.addErrback(lambda f: f.trap(DNSLookupError))
        d.addErrback(log.err)
        self._pending_connectors.add(d) 

def test_connectingCancelledError(self):
        """
        L{error.ConnectingCancelledError} has an C{address} attribute.
        """
        address = object()
        e = error.ConnectingCancelledError(address)
        self.assertIs(e.address, address) 

def test_endpointConnectingCancelled(self):
        """
        Calling L{Deferred.cancel} on the L{Deferred} returned from
        L{IStreamClientEndpoint.connect} is errbacked with an expected
        L{ConnectingCancelledError} exception.
        """
        mreactor = MemoryReactor()
        clientFactory = protocol.Factory()
        clientFactory.protocol = protocol.Protocol

        ep, ignoredArgs, address = self.createClientEndpoint(
            deterministicResolvingReactor(mreactor, ['127.0.0.1']),
            clientFactory
        )

        d = ep.connect(clientFactory)
        d.cancel()
        # When canceled, the connector will immediately notify its factory that
        # the connection attempt has failed due to a UserError.
        attemptFactory = self.retrieveConnectedFactory(mreactor)
        attemptFactory.clientConnectionFailed(None, Failure(error.UserError()))
        # This should be a feature of MemoryReactor: <http://tm.tl/5630>.

        failure = self.failureResultOf(d)

        self.assertIsInstance(failure.value, error.ConnectingCancelledError)
        self.assertEqual(failure.value.address, address)
        self.assertTrue(mreactor.tcpClients[0][2]._connector.stoppedConnecting)
        self.assertEqual([], mreactor.getDelayedCalls()) 

def test_endpointConnectingCancelled(self, advance=None):
        """
        Calling L{Deferred.cancel} on the L{Deferred} returned from
        L{IStreamClientEndpoint.connect} will cause it to be errbacked with a
        L{ConnectingCancelledError} exception.
        """
        mreactor = MemoryReactor()

        clientFactory = protocol.Factory()
        clientFactory.protocol = protocol.Protocol

        ep, ignoredArgs, address = self.createClientEndpoint(
            mreactor, clientFactory)

        d = ep.connect(clientFactory)
        if advance is not None:
            mreactor.advance(advance)
        d.cancel()
        # When canceled, the connector will immediately notify its factory that
        # the connection attempt has failed due to a UserError.
        attemptFactory = self.retrieveConnectedFactory(mreactor)
        attemptFactory.clientConnectionFailed(None, Failure(error.UserError()))
        # This should be a feature of MemoryReactor: <http://tm.tl/5630>.

        failure = self.failureResultOf(d)

        self.assertIsInstance(failure.value, error.ConnectingCancelledError)
        self.assertEqual(failure.value.address, address)
        self.assertTrue(mreactor.tcpClients[0][2]._connector.stoppedConnecting)
        self.assertEqual([], mreactor.getDelayedCalls()) 

def test_endpointConnectingCancelled(self):
        """
        Calling L{Deferred.cancel} on the L{Deferred} returned from
        L{IStreamClientEndpoint.connect} is errbacked with an expected
        L{ConnectingCancelledError} exception.
        """
        mreactor = MemoryReactor()

        clientFactory = object()

        ep, ignoredArgs, address = self.createClientEndpoint(
            mreactor, clientFactory)

        d = ep.connect(clientFactory)

        receivedFailures = []

        def checkFailure(f):
            receivedFailures.append(f)

        d.addErrback(checkFailure)

        d.cancel()
        # When canceled, the connector will immediately notify its factory that
        # the connection attempt has failed due to a UserError.
        attemptFactory = self.retrieveConnectedFactory(mreactor)
        attemptFactory.clientConnectionFailed(None, Failure(error.UserError()))
        # This should be a feature of MemoryReactor: <http://tm.tl/5630>.

        self.assertEqual(len(receivedFailures), 1)

        failure = receivedFailures[0]

        self.assertIsInstance(failure.value, error.ConnectingCancelledError)
        self.assertEqual(failure.value.address, address) 

def test_connectingCancelledError(self):
        """
        L{error.ConnectingCancelledError} has an C{address} attribute.
        """
        address = object()
        e = error.ConnectingCancelledError(address)
        self.assertIs(e.address, address) 

def test_endpointConnectingCancelled(self):
        """
        Calling L{Deferred.cancel} on the L{Deferred} returned from
        L{IStreamClientEndpoint.connect} is errbacked with an expected
        L{ConnectingCancelledError} exception.
        """
        mreactor = MemoryReactor()
        clientFactory = protocol.Factory()
        clientFactory.protocol = protocol.Protocol

        ep, ignoredArgs, address = self.createClientEndpoint(
            deterministicResolvingReactor(mreactor, ['127.0.0.1']),
            clientFactory
        )

        d = ep.connect(clientFactory)
        d.cancel()
        # When canceled, the connector will immediately notify its factory that
        # the connection attempt has failed due to a UserError.
        attemptFactory = self.retrieveConnectedFactory(mreactor)
        attemptFactory.clientConnectionFailed(None, Failure(error.UserError()))
        # This should be a feature of MemoryReactor: <http://tm.tl/5630>.

        failure = self.failureResultOf(d)

        self.assertIsInstance(failure.value, error.ConnectingCancelledError)
        self.assertEqual(failure.value.address, address)
        self.assertTrue(mreactor.tcpClients[0][2]._connector.stoppedConnecting)
        self.assertEqual([], mreactor.getDelayedCalls()) 

def test_endpointConnectingCancelledAfterAllAttemptsStarted(self):
        """
        Calling L{Deferred.cancel} on the L{Deferred} returned from
        L{IStreamClientEndpoint.connect} after enough time has passed that all
        connection attempts have been initiated will cause it to be errbacked
        with a L{ConnectingCancelledError} exception.
        """
        oneBetween = endpoints.HostnameEndpoint._DEFAULT_ATTEMPT_DELAY
        advance = oneBetween + (oneBetween / 2.0)
        self.test_endpointConnectingCancelled(advance=advance) 

def test_endpointConnectingCancelled(self, advance=None):
        """
        Calling L{Deferred.cancel} on the L{Deferred} returned from
        L{IStreamClientEndpoint.connect} will cause it to be errbacked with a
        L{ConnectingCancelledError} exception.
        """
        mreactor = MemoryReactor()

        clientFactory = protocol.Factory()
        clientFactory.protocol = protocol.Protocol

        ep, ignoredArgs, address = self.createClientEndpoint(
            mreactor, clientFactory)

        d = ep.connect(clientFactory)
        if advance is not None:
            mreactor.advance(advance)
        d.cancel()
        # When canceled, the connector will immediately notify its factory that
        # the connection attempt has failed due to a UserError.
        attemptFactory = self.retrieveConnectedFactory(mreactor)
        attemptFactory.clientConnectionFailed(None, Failure(error.UserError()))
        # This should be a feature of MemoryReactor: <http://tm.tl/5630>.

        failure = self.failureResultOf(d)

        self.assertIsInstance(failure.value, error.ConnectingCancelledError)
        self.assertEqual(failure.value.address, address)
        self.assertTrue(mreactor.tcpClients[0][2]._connector.stoppedConnecting)
        self.assertEqual([], mreactor.getDelayedCalls()) 

def test_endpointConnectingCancelled(self):
        """
        Calling L{Deferred.cancel} on the L{Deferred} returned from
        L{IStreamClientEndpoint.connect} is errbacked with an expected
        L{ConnectingCancelledError} exception.
        """
        mreactor = MemoryReactor()

        clientFactory = object()

        ep, ignoredArgs, address = self.createClientEndpoint(
            mreactor, clientFactory)

        d = ep.connect(clientFactory)

        receivedFailures = []

        def checkFailure(f):
            receivedFailures.append(f)

        d.addErrback(checkFailure)

        d.cancel()
        # When canceled, the connector will immediately notify its factory that
        # the connection attempt has failed due to a UserError.
        attemptFactory = self.retrieveConnectedFactory(mreactor)
        attemptFactory.clientConnectionFailed(None, Failure(error.UserError()))
        # This should be a feature of MemoryReactor: <http://tm.tl/5630>.

        self.assertEqual(len(receivedFailures), 1)

        failure = receivedFailures[0]

        self.assertIsInstance(failure.value, error.ConnectingCancelledError)
        self.assertEqual(failure.value.address, address) 

def request(self, url, method='GET', headers={}, data=None, socket=None):
        self.timedout = False

        if socket:
            agent = SocketyAgent(reactor, socket)
        else:
            if url[:5] == 'https':
                if SSL:
                    agent = Agent(reactor, WebClientContextFactory())
                else:
                    raise Exception('HTTPS requested but not supported')
            else:
                agent = Agent(reactor)
        
        request = agent.request(method.encode(), url.encode(),
            Headers(headers),
            StringProducer(data) if data else None
        )

        if self.timeout:
            timer = reactor.callLater(self.timeout, self.abort_request,
                request)

            def timeoutProxy(request):
                if timer.active():
                    timer.cancel()
                return self.response(request)

            def requestAborted(failure):
                if timer.active():
                    timer.cancel()

                failure.trap(defer.CancelledError,
                             error.ConnectingCancelledError)

                raise Timeout(
                    "Request took longer than %s seconds" % self.timeout)

            request.addCallback(timeoutProxy).addErrback(requestAborted)
        else:
            request.addCallback(self.response)

        return request