/usr/lib/python2.7/dist-packages/twext/internet/adaptendpoint.py is in python-twext 0.1.b2.dev15059-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 | # -*- test-case-name: twext.internet.test.test_adaptendpoint -*-
##
# Copyright (c) 2012-2015 Apple Inc. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
##
"""
Adapter for old-style connectTCP/connectSSL code to use endpoints and be happy;
specifically, to receive the additional duplicate notifications that it wants to
receive, L{clientConnectionLost} and L{clientConnectionFailed} on the factory.
"""
from zope.interface import implements
from twisted.internet.interfaces import IConnector
from twisted.internet.protocol import Factory
from twisted.python import log
__all__ = [
"connect"
]
class _WrappedProtocol(object):
"""
A protocol providing a thin wrapper that relays the connectionLost
notification.
"""
def __init__(self, wrapped, wrapper):
"""
@param wrapped: the wrapped L{IProtocol} provider, to which all methods
will be relayed.
@param wrapper: The L{LegacyClientFactoryWrapper} that holds the
relevant L{ClientFactory}.
"""
self._wrapped = wrapped
self._wrapper = wrapper
def __getattr__(self, attr):
"""
Relay all undefined methods to the wrapped protocol.
"""
return getattr(self._wrapped, attr)
def connectionLost(self, reason):
"""
When the connection is lost, return the connection.
"""
try:
self._wrapped.connectionLost(reason)
except:
log.err()
self._wrapper.legacyFactory.clientConnectionLost(self._wrapper, reason)
class LegacyClientFactoryWrapper(Factory):
implements(IConnector)
def __init__(self, legacyFactory, endpoint):
self.currentlyConnecting = False
self.legacyFactory = legacyFactory
self.endpoint = endpoint
self._connectedProtocol = None
self._outstandingAttempt = None
def getDestination(self):
"""
Implement L{IConnector.getDestination}.
@return: the endpoint being connected to as the destination.
"""
return self.endpoint
def buildProtocol(self, addr):
"""
Implement L{Factory.buildProtocol} to return a wrapper protocol that
will capture C{connectionLost} notifications.
@return: a L{Protocol}.
"""
return _WrappedProtocol(self.legacyFactory.buildProtocol(addr), self)
def connect(self):
"""
Implement L{IConnector.connect} to connect the endpoint.
"""
if self._outstandingAttempt is not None:
raise RuntimeError("connection already in progress")
self.legacyFactory.startedConnecting(self)
d = self._outstandingAttempt = self.endpoint.connect(self)
@d.addBoth
def attemptDone(result):
self._outstandingAttempt = None
return result
def rememberProto(proto):
self._connectedProtocol = proto
return proto
def callClientConnectionFailed(reason):
self.legacyFactory.clientConnectionFailed(self, reason)
d.addCallbacks(rememberProto, callClientConnectionFailed)
def disconnect(self):
"""
Implement L{IConnector.disconnect}.
"""
if self._connectedProtocol is not None:
self._connectedProtocol.transport.loseConnection()
elif self._outstandingAttempt is not None:
self._outstandingAttempt.cancel()
def stopConnecting(self):
"""
Implement L{IConnector.stopConnecting}.
"""
if self._outstandingAttempt is None:
raise RuntimeError("no connection attempt in progress")
self.disconnect()
def connect(endpoint, clientFactory):
"""
Connect a L{twisted.internet.protocol.ClientFactory} to a remote host using
the given L{twisted.internet.interfaces.IStreamClientEndpoint}. This relays
C{clientConnectionFailed} and C{clientConnectionLost} notifications as
legacy code using the L{ClientFactory} interface, such as,
L{ReconnectingClientFactory} would expect.
@param endpoint: The endpoint to connect to.
@type endpoint: L{twisted.internet.interfaces.IStreamClientEndpoint}
@param clientFactory: The client factory doing the connecting.
@type clientFactory: L{twisted.internet.protocol.ClientFactory}
@return: A connector object representing the connection attempt just
initiated.
@rtype: L{IConnector}
"""
wrap = LegacyClientFactoryWrapper(clientFactory, endpoint)
wrap.noisy = clientFactory.noisy # relay the noisy attribute to the wrapper
wrap.connect()
return wrap
|