def send(self, msg):
"""
Implements :func:`autobahn.wamp.interfaces.ITransport.send`
"""
if self.isOpen():
try:
self.log.debug(
"WampLongPoll: TX {octets}",
octets=_LazyHexFormatter(msg),
)
payload, isBinary = self._serializer.serialize(msg)
except Exception as e:
# all exceptions raised from above should be serialization errors ..
f = create_failure()
self.log.error(
"Unable to serialize WAMP application payload: {msg}",
msg=failure_message(f),
)
self.log.debug("{tb}", tb=failure_format_traceback(f))
raise SerializationError(
"unable to serialize WAMP application payload ({0})".
format(e))
else:
self._receive.queue(payload)
else:
raise TransportLost()
def send(self, msg):
"""
Implements :func:`autobahn.wamp.interfaces.ITransport.send`
"""
if self.isOpen():
self.log.trace('{klass}.send() (serializer={serializer}): TX WAMP message: "{msg}"',
klass=self.__class__.__name__, msg=msg, serializer=self._serializer)
try:
payload, _ = self._serializer.serialize(msg)
except SerializationError as e:
# all exceptions raised from above should be serialization errors ..
raise SerializationError("WampRawSocketProtocol: unable to serialize WAMP application payload ({0})".format(e))
else:
payload_len = len(payload)
if 0 < self._max_len_send < payload_len:
emsg = 'tried to send RawSocket message with size {} exceeding payload limit of {} octets'.format(
payload_len, self._max_len_send)
self.log.warn(emsg)
raise PayloadExceededError(emsg)
else:
self.sendString(payload)
self.log.trace('{klass}.send(): TX {octets} octets',
klass=self.__class__.__name__, octets=_LazyHexFormatter(payload))
else:
raise TransportLost()
def abort(self):
"""
Implements :func:`autobahn.wamp.interfaces.ITransport.abort`
"""
if self.isOpen():
self._bailout(protocol.WebSocketProtocol.CLOSE_STATUS_CODE_GOING_AWAY)
else:
raise TransportLost()
def close(self):
"""
Implements :func:`autobahn.wamp.interfaces.ITransport.close`
"""
if self.isOpen():
self.sendClose(protocol.WebSocketProtocol.CLOSE_STATUS_CODE_NORMAL)
else:
raise TransportLost()
def close(self):
"""
Implements :func:`autobahn.wamp.interfaces.ITransport.close`
"""
if self.isOpen():
self.transport.loseConnection()
else:
raise TransportLost()
def abort(self):
"""
Implements :func:`autobahn.wamp.interfaces.ITransport.abort`
"""
if self.isOpen():
self.onClose(True, 1000, u"session aborted")
self._receive._kill()
del self._parent._transports[self._transport_id]
else:
raise TransportLost()
def lost(fail):
rtn = orig(fail)
if not txaio.is_called(done):
# asyncio will call connection_lost(None) in case of
# a transport failure, in which case we create an
# appropriate exception
if fail is None:
fail = TransportLost("failed to complete connection")
txaio.reject(done, fail)
return rtn
def onMessage(self, msg):
"""
Callback fired when a WAMP message was received. May run asynchronously. The callback
should return or fire the returned deferred/future when it's done processing the message.
In particular, an implementation of this callback must not access the message afterwards.
:param msg: The WAMP message received.
:type msg: object implementing :class:`autobahn.wamp.interfaces.IMessage`
"""
if self._session_id is None:
# no frontend session established yet, so we expect one of HELLO, ABORT, AUTHENTICATE
# https://wamp-proto.org/_static/gen/wamp_latest.html#session-establishment
if isinstance(msg, message.Hello):
yield self._process_Hello(msg)
# https://wamp-proto.org/_static/gen/wamp_latest.html#session-closing
elif isinstance(msg, message.Abort):
self.transport.send(message.Abort(ApplicationError.AUTHENTICATION_FAILED,
message='Client aborted the session opening handshake'))
# https://wamp-proto.org/_static/gen/wamp_latest.html#wamp-level-authentication
elif isinstance(msg, message.Authenticate):
yield self._process_Authenticate(msg)
else:
raise ProtocolError("Received {} message while proxy frontend session is not joined".format(msg.__class__.__name__))
else:
# frontend session is established: process WAMP message
if isinstance(msg, message.Hello) or isinstance(msg, message.Abort) or isinstance(msg, message.Authenticate):
raise ProtocolError("Received {} message while proxy frontend session is already joined".format(msg.__class__.__name__))
# https://wamp-proto.org/_static/gen/wamp_latest.html#session-closing
elif isinstance(msg, message.Goodbye):
if self._backend_session:
yield self._controller.unmap_backend(self, self._backend_session)
self._backend_session = None
else:
self.log.warn('Frontend session left, but no active backend session to close')
# complete the closing handshake (initiated by the client in this case) by replying with GOODBYE
self.transport.send(message.Goodbye(message='Client aborted the session opening handshake'))
else:
if self._backend_session is None or self._backend_session._transport is None:
raise TransportLost(
"Expected to relay {} message, but proxy backend session or transport is gone".format(
msg.__class__.__name__,
)
)
else:
# if we have an active backend connection, forward the WAMP message ..
self._backend_session._transport.send(msg)
def abort(self):
"""
Implements :func:`autobahn.wamp.interfaces.ITransport.abort`
"""
if self.isOpen():
if hasattr(self.transport, 'abortConnection'):
# ProcessProtocol lacks abortConnection()
self.transport.abortConnection()
else:
self.transport.loseConnection()
else:
raise TransportLost()
def send(self, msg):
"""
Implements :func:`autobahn.wamp.interfaces.ITransport.send`
"""
if self.isOpen():
try:
self.log.debug("WampLongPoll: TX {0}".format(msg))
payload, isBinary = self._serializer.serialize(msg)
except Exception as e:
# all exceptions raised from above should be serialization errors ..
raise SerializationError("unable to serialize WAMP application payload ({0})".format(e))
else:
self._receive.queue(payload)
else:
raise TransportLost()
def send(self, msg):
"""
Implements :func:`autobahn.wamp.interfaces.ITransport.send`
"""
if self.isOpen():
try:
if self.factory.debug_wamp:
print("TX {0}".format(msg))
payload, isBinary = self._serializer.serialize(msg)
except Exception as e:
## all exceptions raised from above should be serialization errors ..
raise SerializationError("Unable to serialize WAMP application payload ({0})".format(e))
else:
self.sendMessage(payload, isBinary)
else:
raise TransportLost()
def send(self, msg):
"""
Implements :func:`autobahn.wamp.interfaces.ITransport.send`
"""
if self.isOpen():
self.log.trace("WampRawSocketProtocol (serializer={serializer}): TX WAMP message: {msg}", msg=msg, serializer=self._serializer)
try:
payload, _ = self._serializer.serialize(msg)
except Exception as e:
# all exceptions raised from above should be serialization errors ..
raise SerializationError("WampRawSocketProtocol: unable to serialize WAMP application payload ({0})".format(e))
else:
self.sendString(payload)
self.log.trace("WampRawSocketProtocol: TX octets: {octets}", octets=_LazyHexFormatter(payload))
else:
raise TransportLost()
def send(self, msg):
"""
Implements :func:`autobahn.wamp.interfaces.ITransport.send`
"""
if self.isOpen():
if self.factory.debug:
log.msg("TX WAMP message: {}".format(msg))
try:
bytes, _ = self.factory._serializer.serialize(msg)
except Exception as e:
## all exceptions raised from above should be serialization errors ..
raise SerializationError("Unable to serialize WAMP application payload ({})".format(e))
else:
self.sendString(bytes)
if self.factory.debug:
log.msg("TX octets: {}".format(binascii.hexlify(bytes)))
else:
raise TransportLost()
def send(self, msg):
"""
Implements :func:`autobahn.wamp.interfaces.ITransport.send`
"""
if self.isOpen():
self.log.debug(
"WampRawSocketProtocol: TX WAMP message: {0}".format(msg))
try:
payload, _ = self._serializer.serialize(msg)
except Exception as e:
# all exceptions raised from above should be serialization errors ..
raise SerializationError(
"WampRawSocketProtocol: unable to serialize WAMP application payload ({0})"
.format(e))
else:
self.sendString(payload)
self.log.debug("WampRawSocketProtocol: TX octets: {0}".format(
binascii.hexlify(payload)))
else:
raise TransportLost()
def on_connect_success(result):
# async connect call returns a 2-tuple
transport, proto = result
# in the case where we .abort() the transport / connection
# during setup, we still get on_connect_success but our
# transport is already closed (this will happen if
# e.g. there's an "open handshake timeout") -- I don't
# know if there's a "better" way to detect this? #python
# doesn't know of one, anyway
if transport.is_closing():
if not txaio.is_called(done):
reason = getattr(proto, "_onclose_reason",
"Connection already closed")
txaio.reject(done, TransportLost(reason))
return
# if e.g. an SSL handshake fails, we will have
# successfully connected (i.e. get here) but need to
# 'listen' for the "connection_lost" from the underlying
# protocol in case of handshake failure .. so we wrap
# it. Also, we don't increment transport.success_count
# here on purpose (because we might not succeed).
# XXX double-check that asyncio behavior on TLS handshake
# failures is in fact as described above
orig = proto.connection_lost
@wraps(orig)
def lost(fail):
rtn = orig(fail)
if not txaio.is_called(done):
# asyncio will call connection_lost(None) in case of
# a transport failure, in which case we create an
# appropriate exception
if fail is None:
fail = TransportLost("failed to complete connection")
txaio.reject(done, fail)
return rtn
proto.connection_lost = lost
def send(self, msg):
"""
Implements :func:`autobahn.wamp.interfaces.ITransport.send`
"""
if self.isOpen():
try:
self.log.trace(
"WAMP SEND: message={message}, session={session}, authid={authid}",
authid=self._session._authid,
session=self._session._session_id,
message=msg,
)
payload, isBinary = self._serializer.serialize(msg)
except Exception as e:
self.log.error("WAMP message serialization error")
# all exceptions raised from above should be serialization errors ..
raise SerializationError(u"WAMP message serialization error: {0}".format(e))
else:
self.sendMessage(payload, isBinary)
else:
raise TransportLost()
