624 lines
22 KiB
Python
624 lines
22 KiB
Python
###############################################################################
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#
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# The MIT License (MIT)
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#
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# Copyright (c) Tavendo GmbH
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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# THE SOFTWARE.
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#
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###############################################################################
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from __future__ import absolute_import
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from base64 import b64encode, b64decode
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from zope.interface import implementer
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import twisted.internet.protocol
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from twisted.internet.defer import maybeDeferred
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from twisted.internet.interfaces import ITransport
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from twisted.internet.error import ConnectionDone
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from autobahn.wamp import websocket
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from autobahn.websocket import protocol
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from autobahn.websocket import http
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from autobahn.twisted.util import peer2str
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from autobahn.logger import make_logger
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from autobahn.websocket.compress import PerMessageDeflateOffer, \
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PerMessageDeflateOfferAccept, \
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PerMessageDeflateResponse, \
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PerMessageDeflateResponseAccept
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__all__ = (
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'WebSocketAdapterProtocol',
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'WebSocketServerProtocol',
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'WebSocketClientProtocol',
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'WebSocketAdapterFactory',
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'WebSocketServerFactory',
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'WebSocketClientFactory',
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'WrappingWebSocketAdapter',
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'WrappingWebSocketServerProtocol',
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'WrappingWebSocketClientProtocol',
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'WrappingWebSocketServerFactory',
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'WrappingWebSocketClientFactory',
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'listenWS',
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'connectWS',
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'WampWebSocketServerProtocol',
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'WampWebSocketServerFactory',
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'WampWebSocketClientProtocol',
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'WampWebSocketClientFactory',
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)
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class WebSocketAdapterProtocol(twisted.internet.protocol.Protocol):
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"""
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Adapter class for Twisted WebSocket client and server protocols.
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"""
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peer = '<never connected>'
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def connectionMade(self):
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# the peer we are connected to
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try:
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peer = self.transport.getPeer()
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except AttributeError:
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# ProcessProtocols lack getPeer()
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self.peer = "process {}".format(self.transport.pid)
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else:
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self.peer = peer2str(peer)
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self._connectionMade()
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# Set "Nagle"
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try:
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self.transport.setTcpNoDelay(self.tcpNoDelay)
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except: # don't touch this! does not work: AttributeError, OSError
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# eg Unix Domain sockets throw Errno 22 on this
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pass
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def connectionLost(self, reason):
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if isinstance(reason.value, ConnectionDone):
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self.factory.log.debug("Cleanly closed connection from {peer}", peer=self.peer)
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else:
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self.factory.log.info("Lost connection to '{peer}': {message}", peer=self.peer, message=reason.value.message)
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self._connectionLost(reason)
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def dataReceived(self, data):
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self._dataReceived(data)
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def _closeConnection(self, abort=False):
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if abort and hasattr(self.transport, 'abortConnection'):
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# ProcessProtocol lacks abortConnection()
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self.transport.abortConnection()
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else:
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self.transport.loseConnection()
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def _onOpen(self):
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self.onOpen()
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def _onMessageBegin(self, isBinary):
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self.onMessageBegin(isBinary)
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def _onMessageFrameBegin(self, length):
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self.onMessageFrameBegin(length)
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def _onMessageFrameData(self, payload):
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self.onMessageFrameData(payload)
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def _onMessageFrameEnd(self):
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self.onMessageFrameEnd()
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def _onMessageFrame(self, payload):
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self.onMessageFrame(payload)
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def _onMessageEnd(self):
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self.onMessageEnd()
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def _onMessage(self, payload, isBinary):
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self.onMessage(payload, isBinary)
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def _onPing(self, payload):
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self.onPing(payload)
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def _onPong(self, payload):
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self.onPong(payload)
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def _onClose(self, wasClean, code, reason):
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self.onClose(wasClean, code, reason)
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def registerProducer(self, producer, streaming):
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"""
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Register a Twisted producer with this protocol.
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Modes: Hybi, Hixie
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:param producer: A Twisted push or pull producer.
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:type producer: object
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:param streaming: Producer type.
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:type streaming: bool
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"""
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self.transport.registerProducer(producer, streaming)
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class WebSocketServerProtocol(WebSocketAdapterProtocol, protocol.WebSocketServerProtocol):
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"""
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Base class for Twisted-based WebSocket server protocols.
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"""
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def _onConnect(self, request):
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# onConnect() will return the selected subprotocol or None
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# or a pair (protocol, headers) or raise an HttpException
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res = maybeDeferred(self.onConnect, request)
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res.addCallback(self.succeedHandshake)
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def forwardError(failure):
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if failure.check(http.HttpException):
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return self.failHandshake(failure.value.reason, failure.value.code)
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else:
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if self.debug:
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self.factory._log("Unexpected exception in onConnect ['%s']" % failure.value)
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return self.failHandshake(http.INTERNAL_SERVER_ERROR[1], http.INTERNAL_SERVER_ERROR[0])
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res.addErrback(forwardError)
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class WebSocketClientProtocol(WebSocketAdapterProtocol, protocol.WebSocketClientProtocol):
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"""
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Base class for Twisted-based WebSocket client protocols.
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"""
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def _onConnect(self, response):
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self.onConnect(response)
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class WebSocketAdapterFactory(object):
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"""
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Adapter class for Twisted-based WebSocket client and server factories.
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"""
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log = make_logger("twisted")
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class WebSocketServerFactory(WebSocketAdapterFactory, protocol.WebSocketServerFactory, twisted.internet.protocol.ServerFactory):
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"""
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Base class for Twisted-based WebSocket server factories.
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.. seealso:: `twisted.internet.protocol.ServerFactory <http://twistedmatrix.com/documents/current/api/twisted.internet.protocol.ServerFactory.html>`_
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"""
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def __init__(self, *args, **kwargs):
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"""
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In addition to all arguments to the constructor of
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:class:`autobahn.websocket.protocol.WebSocketServerFactory`,
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you can supply a `reactor` keyword argument to specify the
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Twisted reactor to be used.
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"""
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# lazy import to avoid reactor install upon module import
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if 'reactor' in kwargs:
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if kwargs['reactor']:
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self.reactor = kwargs['reactor']
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else:
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from twisted.internet import reactor
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self.reactor = reactor
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del kwargs['reactor']
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else:
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from twisted.internet import reactor
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self.reactor = reactor
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protocol.WebSocketServerFactory.__init__(self, *args, **kwargs)
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class WebSocketClientFactory(WebSocketAdapterFactory, protocol.WebSocketClientFactory, twisted.internet.protocol.ClientFactory):
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"""
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Base class for Twisted-based WebSocket client factories.
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.. seealso:: `twisted.internet.protocol.ClientFactory <http://twistedmatrix.com/documents/current/api/twisted.internet.protocol.ClientFactory.html>`_
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"""
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def __init__(self, *args, **kwargs):
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"""
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In addition to all arguments to the constructor of
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:class:`autobahn.websocket.protocol.WebSocketClientFactory`,
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you can supply a `reactor` keyword argument to specify the
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Twisted reactor to be used.
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"""
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# lazy import to avoid reactor install upon module import
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if 'reactor' in kwargs:
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if kwargs['reactor']:
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self.reactor = kwargs['reactor']
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else:
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from twisted.internet import reactor
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self.reactor = reactor
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del kwargs['reactor']
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else:
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from twisted.internet import reactor
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self.reactor = reactor
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protocol.WebSocketClientFactory.__init__(self, *args, **kwargs)
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@implementer(ITransport)
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class WrappingWebSocketAdapter(object):
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"""
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An adapter for stream-based transport over WebSocket.
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This follows `websockify <https://github.com/kanaka/websockify>`_
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and should be compatible with that.
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It uses WebSocket subprotocol negotiation and supports the
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following WebSocket subprotocols:
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- ``binary`` (or a compatible subprotocol)
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- ``base64``
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Octets are either transmitted as the payload of WebSocket binary
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messages when using the ``binary`` subprotocol (or an alternative
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binary compatible subprotocol), or encoded with Base64 and then
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transmitted as the payload of WebSocket text messages when using
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the ``base64`` subprotocol.
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"""
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def onConnect(self, requestOrResponse):
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# Negotiate either the 'binary' or the 'base64' WebSocket subprotocol
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if isinstance(requestOrResponse, protocol.ConnectionRequest):
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request = requestOrResponse
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for p in request.protocols:
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if p in self.factory._subprotocols:
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self._binaryMode = (p != 'base64')
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return p
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raise http.HttpException(http.NOT_ACCEPTABLE[0], "this server only speaks %s WebSocket subprotocols" % self.factory._subprotocols)
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elif isinstance(requestOrResponse, protocol.ConnectionResponse):
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response = requestOrResponse
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if response.protocol not in self.factory._subprotocols:
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self.failConnection(protocol.WebSocketProtocol.CLOSE_STATUS_CODE_PROTOCOL_ERROR, "this client only speaks %s WebSocket subprotocols" % self.factory._subprotocols)
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self._binaryMode = (response.protocol != 'base64')
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else:
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# should not arrive here
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raise Exception("logic error")
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def onOpen(self):
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self._proto.connectionMade()
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def onMessage(self, payload, isBinary):
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if isBinary != self._binaryMode:
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self.failConnection(protocol.WebSocketProtocol.CLOSE_STATUS_CODE_UNSUPPORTED_DATA, "message payload type does not match the negotiated subprotocol")
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else:
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if not isBinary:
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try:
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payload = b64decode(payload)
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except Exception as e:
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self.failConnection(protocol.WebSocketProtocol.CLOSE_STATUS_CODE_INVALID_PAYLOAD, "message payload base64 decoding error: {0}".format(e))
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# print("forwarding payload: {0}".format(binascii.hexlify(payload)))
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self._proto.dataReceived(payload)
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# noinspection PyUnusedLocal
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def onClose(self, wasClean, code, reason):
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self._proto.connectionLost(None)
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def write(self, data):
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# print("sending payload: {0}".format(binascii.hexlify(data)))
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# part of ITransport
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assert(type(data) == bytes)
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if self._binaryMode:
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self.sendMessage(data, isBinary=True)
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else:
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data = b64encode(data)
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self.sendMessage(data, isBinary=False)
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def writeSequence(self, data):
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# part of ITransport
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for d in data:
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self.write(d)
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def loseConnection(self):
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# part of ITransport
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self.sendClose()
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def getPeer(self):
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# part of ITransport
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return self.transport.getPeer()
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def getHost(self):
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# part of ITransport
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return self.transport.getHost()
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class WrappingWebSocketServerProtocol(WrappingWebSocketAdapter, WebSocketServerProtocol):
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"""
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Server protocol for stream-based transport over WebSocket.
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"""
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class WrappingWebSocketClientProtocol(WrappingWebSocketAdapter, WebSocketClientProtocol):
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"""
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Client protocol for stream-based transport over WebSocket.
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"""
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class WrappingWebSocketServerFactory(WebSocketServerFactory):
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"""
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Wrapping server factory for stream-based transport over WebSocket.
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"""
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def __init__(self,
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factory,
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url,
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reactor=None,
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enableCompression=True,
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autoFragmentSize=0,
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subprotocol=None,
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debug=False):
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"""
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:param factory: Stream-based factory to be wrapped.
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:type factory: A subclass of ``twisted.internet.protocol.Factory``
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:param url: WebSocket URL of the server this server factory will work for.
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:type url: unicode
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"""
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self._factory = factory
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self._subprotocols = ['binary', 'base64']
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if subprotocol:
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self._subprotocols.append(subprotocol)
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WebSocketServerFactory.__init__(self,
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url=url,
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reactor=reactor,
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protocols=self._subprotocols,
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debug=debug)
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# automatically fragment outgoing traffic into WebSocket frames
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# of this size
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self.setProtocolOptions(autoFragmentSize=autoFragmentSize)
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# play nice and perform WS closing handshake
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self.setProtocolOptions(failByDrop=False)
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if enableCompression:
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# Enable WebSocket extension "permessage-deflate".
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# Function to accept offers from the client ..
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def accept(offers):
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for offer in offers:
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if isinstance(offer, PerMessageDeflateOffer):
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return PerMessageDeflateOfferAccept(offer)
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self.setProtocolOptions(perMessageCompressionAccept=accept)
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def buildProtocol(self, addr):
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proto = WrappingWebSocketServerProtocol()
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proto.factory = self
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proto._proto = self._factory.buildProtocol(addr)
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proto._proto.transport = proto
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return proto
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def startFactory(self):
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self._factory.startFactory()
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WebSocketServerFactory.startFactory(self)
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def stopFactory(self):
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self._factory.stopFactory()
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WebSocketServerFactory.stopFactory(self)
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class WrappingWebSocketClientFactory(WebSocketClientFactory):
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"""
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Wrapping client factory for stream-based transport over WebSocket.
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"""
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def __init__(self,
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factory,
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url,
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reactor=None,
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enableCompression=True,
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autoFragmentSize=0,
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subprotocol=None,
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debug=False):
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"""
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:param factory: Stream-based factory to be wrapped.
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:type factory: A subclass of ``twisted.internet.protocol.Factory``
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:param url: WebSocket URL of the server this client factory will connect to.
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:type url: unicode
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"""
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self._factory = factory
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self._subprotocols = ['binary', 'base64']
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if subprotocol:
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self._subprotocols.append(subprotocol)
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WebSocketClientFactory.__init__(self,
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url=url,
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reactor=reactor,
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protocols=self._subprotocols,
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debug=debug)
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# automatically fragment outgoing traffic into WebSocket frames
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# of this size
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self.setProtocolOptions(autoFragmentSize=autoFragmentSize)
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# play nice and perform WS closing handshake
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self.setProtocolOptions(failByDrop=False)
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if enableCompression:
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# Enable WebSocket extension "permessage-deflate".
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# The extensions offered to the server ..
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offers = [PerMessageDeflateOffer()]
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self.setProtocolOptions(perMessageCompressionOffers=offers)
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# Function to accept responses from the server ..
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def accept(response):
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if isinstance(response, PerMessageDeflateResponse):
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return PerMessageDeflateResponseAccept(response)
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self.setProtocolOptions(perMessageCompressionAccept=accept)
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def buildProtocol(self, addr):
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proto = WrappingWebSocketClientProtocol()
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proto.factory = self
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proto._proto = self._factory.buildProtocol(addr)
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proto._proto.transport = proto
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return proto
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def connectWS(factory, contextFactory=None, timeout=30, bindAddress=None):
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"""
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Establish WebSocket connection to a server. The connection parameters like target
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host, port, resource and others are provided via the factory.
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:param factory: The WebSocket protocol factory to be used for creating client protocol instances.
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:type factory: An :class:`autobahn.websocket.WebSocketClientFactory` instance.
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:param contextFactory: SSL context factory, required for secure WebSocket connections ("wss").
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:type contextFactory: A `twisted.internet.ssl.ClientContextFactory <http://twistedmatrix.com/documents/current/api/twisted.internet.ssl.ClientContextFactory.html>`_ instance.
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:param timeout: Number of seconds to wait before assuming the connection has failed.
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:type timeout: int
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:param bindAddress: A (host, port) tuple of local address to bind to, or None.
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:type bindAddress: tuple
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:returns: The connector.
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:rtype: An object which implements `twisted.interface.IConnector <http://twistedmatrix.com/documents/current/api/twisted.internet.interfaces.IConnector.html>`_.
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"""
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# lazy import to avoid reactor install upon module import
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if hasattr(factory, 'reactor'):
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reactor = factory.reactor
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else:
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from twisted.internet import reactor
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if factory.proxy is not None:
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if factory.isSecure:
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raise Exception("WSS over explicit proxies not implemented")
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else:
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conn = reactor.connectTCP(factory.proxy['host'], factory.proxy['port'], factory, timeout, bindAddress)
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else:
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if factory.isSecure:
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if contextFactory is None:
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# create default client SSL context factory when none given
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from twisted.internet import ssl
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contextFactory = ssl.ClientContextFactory()
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conn = reactor.connectSSL(factory.host, factory.port, factory, contextFactory, timeout, bindAddress)
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else:
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conn = reactor.connectTCP(factory.host, factory.port, factory, timeout, bindAddress)
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return conn
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def listenWS(factory, contextFactory=None, backlog=50, interface=''):
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"""
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Listen for incoming WebSocket connections from clients. The connection parameters like
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listening port and others are provided via the factory.
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:param factory: The WebSocket protocol factory to be used for creating server protocol instances.
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:type factory: An :class:`autobahn.websocket.WebSocketServerFactory` instance.
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:param contextFactory: SSL context factory, required for secure WebSocket connections ("wss").
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:type contextFactory: A twisted.internet.ssl.ContextFactory.
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:param backlog: Size of the listen queue.
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:type backlog: int
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:param interface: The interface (derived from hostname given) to bind to, defaults to '' (all).
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:type interface: str
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:returns: The listening port.
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:rtype: An object that implements `twisted.interface.IListeningPort <http://twistedmatrix.com/documents/current/api/twisted.internet.interfaces.IListeningPort.html>`_.
|
|
"""
|
|
# lazy import to avoid reactor install upon module import
|
|
if hasattr(factory, 'reactor'):
|
|
reactor = factory.reactor
|
|
else:
|
|
from twisted.internet import reactor
|
|
|
|
if factory.isSecure:
|
|
if contextFactory is None:
|
|
raise Exception("Secure WebSocket listen requested, but no SSL context factory given")
|
|
listener = reactor.listenSSL(factory.port, factory, contextFactory, backlog, interface)
|
|
else:
|
|
listener = reactor.listenTCP(factory.port, factory, backlog, interface)
|
|
return listener
|
|
|
|
|
|
class WampWebSocketServerProtocol(websocket.WampWebSocketServerProtocol, WebSocketServerProtocol):
|
|
"""
|
|
Base class for Twisted-based WAMP-over-WebSocket server protocols.
|
|
"""
|
|
|
|
|
|
class WampWebSocketServerFactory(websocket.WampWebSocketServerFactory, WebSocketServerFactory):
|
|
"""
|
|
Base class for Twisted-based WAMP-over-WebSocket server factories.
|
|
"""
|
|
|
|
protocol = WampWebSocketServerProtocol
|
|
|
|
def __init__(self, factory, *args, **kwargs):
|
|
|
|
if 'serializers' in kwargs:
|
|
serializers = kwargs['serializers']
|
|
del kwargs['serializers']
|
|
else:
|
|
serializers = None
|
|
|
|
if 'debug_wamp' in kwargs:
|
|
debug_wamp = kwargs['debug_wamp']
|
|
del kwargs['debug_wamp']
|
|
else:
|
|
debug_wamp = False
|
|
|
|
websocket.WampWebSocketServerFactory.__init__(self, factory, serializers, debug_wamp=debug_wamp)
|
|
|
|
kwargs['protocols'] = self._protocols
|
|
|
|
# noinspection PyCallByClass
|
|
WebSocketServerFactory.__init__(self, *args, **kwargs)
|
|
|
|
|
|
class WampWebSocketClientProtocol(websocket.WampWebSocketClientProtocol, WebSocketClientProtocol):
|
|
"""
|
|
Base class for Twisted-based WAMP-over-WebSocket client protocols.
|
|
"""
|
|
|
|
|
|
class WampWebSocketClientFactory(websocket.WampWebSocketClientFactory, WebSocketClientFactory):
|
|
"""
|
|
Base class for Twisted-based WAMP-over-WebSocket client factories.
|
|
"""
|
|
|
|
protocol = WampWebSocketClientProtocol
|
|
|
|
def __init__(self, factory, *args, **kwargs):
|
|
|
|
if 'serializers' in kwargs:
|
|
serializers = kwargs['serializers']
|
|
del kwargs['serializers']
|
|
else:
|
|
serializers = None
|
|
|
|
if 'debug_wamp' in kwargs:
|
|
debug_wamp = kwargs['debug_wamp']
|
|
del kwargs['debug_wamp']
|
|
else:
|
|
debug_wamp = False
|
|
|
|
websocket.WampWebSocketClientFactory.__init__(self, factory, serializers, debug_wamp=debug_wamp)
|
|
|
|
kwargs['protocols'] = self._protocols
|
|
|
|
WebSocketClientFactory.__init__(self, *args, **kwargs)
|