def onMessage(self, msg):
"""
Implements :func:`autobahn.wamp.interfaces.ITransportHandler.onMessage`
"""
if self._session_id is None:
## the first message must be WELCOME, ABORT or CHALLENGE ..
##
if isinstance(msg, message.Welcome):
self._session_id = msg.session
details = SessionDetails(self._realm, self._session_id, msg.authid, msg.authrole, msg.authmethod)
self._as_future(self.onJoin, details)
elif isinstance(msg, message.Abort):
## fire callback and close the transport
self.onLeave(types.CloseDetails(msg.reason, msg.message))
elif isinstance(msg, message.Challenge):
challenge = types.Challenge(msg.method, msg.extra)
d = self._as_future(self.onChallenge, challenge)
def success(signature):
reply = message.Authenticate(signature)
self._transport.send(reply)
def error(err):
reply = message.Abort(u"wamp.error.cannot_authenticate", u"{0}".format(err.value))
self._transport.send(reply)
## fire callback and close the transport
self.onLeave(types.CloseDetails(reply.reason, reply.message))
self._add_future_callbacks(d, success, error)
else:
raise ProtocolError("Received {0} message, and session is not yet established".format(msg.__class__))
else:
if isinstance(msg, message.Goodbye):
if not self._goodbye_sent:
## the peer wants to close: send GOODBYE reply
reply = message.Goodbye()
self._transport.send(reply)
self._session_id = None
## fire callback and close the transport
self.onLeave(types.CloseDetails(msg.reason, msg.message))
## consumer messages
##
elif isinstance(msg, message.Event):
if msg.subscription in self._subscriptions:
handler = self._subscriptions[msg.subscription]
if handler.details_arg:
if not msg.kwargs:
msg.kwargs = {}
msg.kwargs[handler.details_arg] = types.EventDetails(publication = msg.publication, publisher = msg.publisher)
try:
if handler.obj:
if msg.kwargs:
if msg.args:
handler.fn(handler.obj, *msg.args, **msg.kwargs)
else:
handler.fn(handler.obj, **msg.kwargs)
else:
if msg.args:
handler.fn(handler.obj, *msg.args)
else:
handler.fn(handler.obj)
else:
if msg.kwargs:
if msg.args:
handler.fn(*msg.args, **msg.kwargs)
else:
handler.fn(**msg.kwargs)
else:
if msg.args:
handler.fn(*msg.args)
else:
handler.fn()
except Exception as e:
if self.debug_app:
print("Failure while firing event handler {0} subscribed under '{1}' ({2}): {3}".format(handler.fn, handler.topic, msg.subscription, e))
else:
raise ProtocolError("EVENT received for non-subscribed subscription ID {0}".format(msg.subscription))
elif isinstance(msg, message.Published):
if msg.request in self._publish_reqs:
d, opts = self._publish_reqs.pop(msg.request)
p = Publication(msg.publication)
self._resolve_future(d, p)
else:
raise ProtocolError("PUBLISHED received for non-pending request ID {0}".format(msg.request))
elif isinstance(msg, message.Subscribed):
if msg.request in self._subscribe_reqs:
d, obj, fn, topic, options = self._subscribe_reqs.pop(msg.request)
if options:
self._subscriptions[msg.subscription] = Handler(obj, fn, topic, options.details_arg)
else:
self._subscriptions[msg.subscription] = Handler(obj, fn, topic)
s = Subscription(self, msg.subscription)
self._resolve_future(d, s)
else:
raise ProtocolError("SUBSCRIBED received for non-pending request ID {0}".format(msg.request))
elif isinstance(msg, message.Unsubscribed):
if msg.request in self._unsubscribe_reqs:
d, subscription = self._unsubscribe_reqs.pop(msg.request)
if subscription.id in self._subscriptions:
del self._subscriptions[subscription.id]
subscription.active = False
self._resolve_future(d, None)
else:
raise ProtocolError("UNSUBSCRIBED received for non-pending request ID {0}".format(msg.request))
elif isinstance(msg, message.Result):
if msg.request in self._call_reqs:
if msg.progress:
## progressive result
##
_, opts = self._call_reqs[msg.request]
if opts.onProgress:
try:
if msg.kwargs:
if msg.args:
opts.onProgress(*msg.args, **msg.kwargs)
else:
opts.onProgress(**msg.kwargs)
else:
if msg.args:
opts.onProgress(*msg.args)
else:
opts.onProgress()
except Exception as e:
## silently drop exceptions raised in progressive results handlers
if self.debug:
print("Exception raised in progressive results handler: {0}".format(e))
else:
## silently ignore progressive results
pass
else:
## final result
##
d, opts = self._call_reqs.pop(msg.request)
if msg.kwargs:
if msg.args:
res = types.CallResult(*msg.args, **msg.kwargs)
else:
res = types.CallResult(**msg.kwargs)
self._resolve_future(d, res)
else:
if msg.args:
if len(msg.args) > 1:
res = types.CallResult(*msg.args)
self._resolve_future(d, res)
else:
self._resolve_future(d, msg.args[0])
else:
self._resolve_future(d, None)
else:
raise ProtocolError("RESULT received for non-pending request ID {0}".format(msg.request))
elif isinstance(msg, message.Invocation):
if msg.request in self._invocations:
raise ProtocolError("INVOCATION received for request ID {0} already invoked".format(msg.request))
else:
if msg.registration not in self._registrations:
raise ProtocolError("INVOCATION received for non-registered registration ID {0}".format(msg.registration))
else:
endpoint = self._registrations[msg.registration]
if endpoint.options and endpoint.options.details_arg:
if not msg.kwargs:
msg.kwargs = {}
if msg.receive_progress:
def progress(*args, **kwargs):
progress_msg = message.Yield(msg.request, args = args, kwargs = kwargs, progress = True)
self._transport.send(progress_msg)
else:
progress = None
msg.kwargs[endpoint.options.details_arg] = types.CallDetails(progress, caller = msg.caller,
caller_transport = msg.caller_transport, authid = msg.authid, authrole = msg.authrole,
authmethod = msg.authmethod)
if endpoint.obj:
if msg.kwargs:
if msg.args:
d = self._as_future(endpoint.fn, endpoint.obj, *msg.args, **msg.kwargs)
else:
d = self._as_future(endpoint.fn, endpoint.obj, **msg.kwargs)
else:
if msg.args:
d = self._as_future(endpoint.fn, endpoint.obj, *msg.args)
else:
d = self._as_future(endpoint.fn, endpoint.obj)
else:
if msg.kwargs:
if msg.args:
d = self._as_future(endpoint.fn, *msg.args, **msg.kwargs)
else:
d = self._as_future(endpoint.fn, **msg.kwargs)
else:
if msg.args:
d = self._as_future(endpoint.fn, *msg.args)
else:
d = self._as_future(endpoint.fn)
def success(res):
del self._invocations[msg.request]
if isinstance(res, types.CallResult):
reply = message.Yield(msg.request, args = res.results, kwargs = res.kwresults)
else:
reply = message.Yield(msg.request, args = [res])
self._transport.send(reply)
def error(err):
if self.traceback_app:
## if asked to marshal the traceback within the WAMP error message, extract it
# noinspection PyCallingNonCallable
tb = StringIO()
err.printTraceback(file = tb)
tb = tb.getvalue().splitlines()
else:
tb = None
if self.debug_app:
print("Failure while invoking procedure {0} registered under '{1}' ({2}):".format(endpoint.fn, endpoint.procedure, msg.registration))
print(err)
del self._invocations[msg.request]
if hasattr(err, 'value'):
exc = err.value
else:
exc = err
reply = self._message_from_exception(message.Invocation.MESSAGE_TYPE, msg.request, exc, tb)
self._transport.send(reply)
self._invocations[msg.request] = d
self._add_future_callbacks(d, success, error)
elif isinstance(msg, message.Interrupt):
if msg.request not in self._invocations:
raise ProtocolError("INTERRUPT received for non-pending invocation {0}".format(msg.request))
else:
# noinspection PyBroadException
try:
self._invocations[msg.request].cancel()
except Exception:
if self.debug:
print("could not cancel call {0}".format(msg.request))
finally:
del self._invocations[msg.request]
elif isinstance(msg, message.Registered):
if msg.request in self._register_reqs:
d, obj, fn, procedure, options = self._register_reqs.pop(msg.request)
self._registrations[msg.registration] = Endpoint(obj, fn, procedure, options)
r = Registration(self, msg.registration)
self._resolve_future(d, r)
else:
raise ProtocolError("REGISTERED received for non-pending request ID {0}".format(msg.request))
elif isinstance(msg, message.Unregistered):
if msg.request in self._unregister_reqs:
d, registration = self._unregister_reqs.pop(msg.request)
if registration.id in self._registrations:
del self._registrations[registration.id]
registration.active = False
self._resolve_future(d, None)
else:
raise ProtocolError("UNREGISTERED received for non-pending request ID {0}".format(msg.request))
elif isinstance(msg, message.Error):
d = None
## ERROR reply to PUBLISH
##
if msg.request_type == message.Publish.MESSAGE_TYPE and msg.request in self._publish_reqs:
d = self._publish_reqs.pop(msg.request)[0]
## ERROR reply to SUBSCRIBE
##
elif msg.request_type == message.Subscribe.MESSAGE_TYPE and msg.request in self._subscribe_reqs:
d = self._subscribe_reqs.pop(msg.request)[0]
## ERROR reply to UNSUBSCRIBE
##
elif msg.request_type == message.Unsubscribe.MESSAGE_TYPE and msg.request in self._unsubscribe_reqs:
d = self._unsubscribe_reqs.pop(msg.request)[0]
## ERROR reply to REGISTER
##
elif msg.request_type == message.Register.MESSAGE_TYPE and msg.request in self._register_reqs:
d = self._register_reqs.pop(msg.request)[0]
## ERROR reply to UNREGISTER
##
elif msg.request_type == message.Unregister.MESSAGE_TYPE and msg.request in self._unregister_reqs:
d = self._unregister_reqs.pop(msg.request)[0]
## ERROR reply to CALL
##
elif msg.request_type == message.Call.MESSAGE_TYPE and msg.request in self._call_reqs:
d = self._call_reqs.pop(msg.request)[0]
if d:
self._reject_future(d, self._exception_from_message(msg))
else:
raise ProtocolError("WampAppSession.onMessage(): ERROR received for non-pending request_type {0} and request ID {1}".format(msg.request_type, msg.request))
elif isinstance(msg, message.Heartbeat):
pass ## FIXME
else:
raise ProtocolError("Unexpected message {0}".format(msg.__class__))
def onMessage(self, msg):
"""
Implements :func:`autobahn.wamp.interfaces.ITransportHandler.onMessage`
"""
if self._session_id is None:
# the first message must be WELCOME, ABORT or CHALLENGE ..
if isinstance(msg, message.Welcome):
self._session_id = msg.session
details = SessionDetails(self._realm, self._session_id,
msg.authid, msg.authrole,
msg.authmethod)
d = txaio.as_future(self.onJoin, details)
def _error(e):
return self._swallow_error(e, "While firing onJoin")
txaio.add_callbacks(d, None, _error)
elif isinstance(msg, message.Abort):
# fire callback and close the transport
details = types.CloseDetails(msg.reason, msg.message)
d = txaio.as_future(self.onLeave, details)
def _error(e):
return self._swallow_error(e, "While firing onLeave")
txaio.add_callbacks(d, None, _error)
elif isinstance(msg, message.Challenge):
challenge = types.Challenge(msg.method, msg.extra)
d = txaio.as_future(self.onChallenge, challenge)
def success(signature):
if not isinstance(signature, six.text_type):
raise Exception('signature must be unicode')
reply = message.Authenticate(signature)
self._transport.send(reply)
def error(err):
self.onUserError(err, "Authentication failed")
reply = message.Abort(u"wamp.error.cannot_authenticate",
u"{0}".format(err.value))
self._transport.send(reply)
# fire callback and close the transport
details = types.CloseDetails(reply.reason, reply.message)
d = txaio.as_future(self.onLeave, details)
def _error(e):
return self._swallow_error(e, "While firing onLeave")
txaio.add_callbacks(d, None, _error)
# switching to the callback chain, effectively
# cancelling error (which we've now handled)
return d
txaio.add_callbacks(d, success, error)
else:
raise ProtocolError(
"Received {0} message, and session is not yet established".
format(msg.__class__))
else:
# self._session_id != None (aka "session established")
if isinstance(msg, message.Goodbye):
if not self._goodbye_sent:
# the peer wants to close: send GOODBYE reply
reply = message.Goodbye()
self._transport.send(reply)
self._session_id = None
# fire callback and close the transport
details = types.CloseDetails(msg.reason, msg.message)
d = txaio.as_future(self.onLeave, details)
def _error(e):
errmsg = 'While firing onLeave for reason "{0}" and message "{1}"'.format(
msg.reason, msg.message)
return self._swallow_error(e, errmsg)
txaio.add_callbacks(d, None, _error)
elif isinstance(msg, message.Event):
if msg.subscription in self._subscriptions:
# fire all event handlers on subscription ..
for subscription in self._subscriptions[msg.subscription]:
handler = subscription.handler
invoke_args = (
handler.obj, ) if handler.obj else tuple()
if msg.args:
invoke_args = invoke_args + tuple(msg.args)
invoke_kwargs = msg.kwargs if msg.kwargs else dict()
if handler.details_arg:
invoke_kwargs[
handler.details_arg] = types.EventDetails(
publication=msg.publication,
publisher=msg.publisher,
topic=msg.topic or subscription.topic)
def _error(e):
errmsg = 'While firing {0} subscribed under {1}.'.format(
handler.fn, msg.subscription)
return self._swallow_error(e, errmsg)
future = txaio.as_future(handler.fn, *invoke_args,
**invoke_kwargs)
txaio.add_callbacks(future, None, _error)
else:
raise ProtocolError(
"EVENT received for non-subscribed subscription ID {0}"
.format(msg.subscription))
elif isinstance(msg, message.Published):
if msg.request in self._publish_reqs:
# get and pop outstanding publish request
publish_request = self._publish_reqs.pop(msg.request)
# create a new publication object
publication = Publication(msg.publication)
# resolve deferred/future for publishing successfully
txaio.resolve(publish_request.on_reply, publication)
else:
raise ProtocolError(
"PUBLISHED received for non-pending request ID {0}".
format(msg.request))
elif isinstance(msg, message.Subscribed):
if msg.request in self._subscribe_reqs:
# get and pop outstanding subscribe request
request = self._subscribe_reqs.pop(msg.request)
# create new handler subscription list for subscription ID if not yet tracked
if msg.subscription not in self._subscriptions:
self._subscriptions[msg.subscription] = []
subscription = Subscription(msg.subscription,
request.topic, self,
request.handler)
# add handler to existing subscription
self._subscriptions[msg.subscription].append(subscription)
# resolve deferred/future for subscribing successfully
txaio.resolve(request.on_reply, subscription)
else:
raise ProtocolError(
"SUBSCRIBED received for non-pending request ID {0}".
format(msg.request))
elif isinstance(msg, message.Unsubscribed):
if msg.request in self._unsubscribe_reqs:
# get and pop outstanding subscribe request
request = self._unsubscribe_reqs.pop(msg.request)
# if the subscription still exists, mark as inactive and remove ..
if request.subscription_id in self._subscriptions:
for subscription in self._subscriptions[
request.subscription_id]:
subscription.active = False
del self._subscriptions[request.subscription_id]
# resolve deferred/future for unsubscribing successfully
txaio.resolve(request.on_reply, 0)
else:
raise ProtocolError(
"UNSUBSCRIBED received for non-pending request ID {0}".
format(msg.request))
elif isinstance(msg, message.Result):
if msg.request in self._call_reqs:
if msg.progress:
# progressive result
call_request = self._call_reqs[msg.request]
if call_request.options.on_progress:
kw = msg.kwargs or dict()
args = msg.args or tuple()
try:
# XXX what if on_progress returns a Deferred/Future?
call_request.options.on_progress(*args, **kw)
except Exception:
try:
self.onUserError(
txaio.create_failure(),
"While firing on_progress",
)
except:
pass
else:
# silently ignore progressive results
pass
else:
# final result
#
call_request = self._call_reqs.pop(msg.request)
on_reply = call_request.on_reply
if msg.kwargs:
if msg.args:
res = types.CallResult(*msg.args, **msg.kwargs)
else:
res = types.CallResult(**msg.kwargs)
txaio.resolve(on_reply, res)
else:
if msg.args:
if len(msg.args) > 1:
res = types.CallResult(*msg.args)
txaio.resolve(on_reply, res)
else:
txaio.resolve(on_reply, msg.args[0])
else:
txaio.resolve(on_reply, None)
else:
raise ProtocolError(
"RESULT received for non-pending request ID {0}".
format(msg.request))
elif isinstance(msg, message.Invocation):
if msg.request in self._invocations:
raise ProtocolError(
"INVOCATION received for request ID {0} already invoked"
.format(msg.request))
else:
if msg.registration not in self._registrations:
raise ProtocolError(
"INVOCATION received for non-registered registration ID {0}"
.format(msg.registration))
else:
registration = self._registrations[msg.registration]
endpoint = registration.endpoint
if endpoint.obj is not None:
invoke_args = (endpoint.obj, )
else:
invoke_args = tuple()
if msg.args:
invoke_args = invoke_args + tuple(msg.args)
invoke_kwargs = msg.kwargs if msg.kwargs else dict()
if endpoint.details_arg:
if msg.receive_progress:
def progress(*args, **kwargs):
progress_msg = message.Yield(msg.request,
args=args,
kwargs=kwargs,
progress=True)
self._transport.send(progress_msg)
else:
progress = None
invoke_kwargs[
endpoint.details_arg] = types.CallDetails(
progress,
caller=msg.caller,
procedure=msg.procedure)
on_reply = txaio.as_future(endpoint.fn, *invoke_args,
**invoke_kwargs)
def success(res):
del self._invocations[msg.request]
if isinstance(res, types.CallResult):
reply = message.Yield(msg.request,
args=res.results,
kwargs=res.kwresults)
else:
reply = message.Yield(msg.request, args=[res])
try:
self._transport.send(reply)
except SerializationError as e:
# the application-level payload returned from the invoked procedure can't be serialized
reply = message.Error(
message.Invocation.MESSAGE_TYPE,
msg.request,
ApplicationError.INVALID_PAYLOAD,
args=[
u'success return value from invoked procedure "{0}" could not be serialized: {1}'
.format(registration.procedure, e)
])
self._transport.send(reply)
def error(err):
errmsg = txaio.failure_message(err)
try:
self.onUserError(err, errmsg)
except:
pass
formatted_tb = None
if self.traceback_app:
formatted_tb = txaio.failure_format_traceback(
err)
del self._invocations[msg.request]
reply = self._message_from_exception(
message.Invocation.MESSAGE_TYPE,
msg.request,
err.value,
formatted_tb,
)
try:
self._transport.send(reply)
except SerializationError as e:
# the application-level payload returned from the invoked procedure can't be serialized
reply = message.Error(
message.Invocation.MESSAGE_TYPE,
msg.request,
ApplicationError.INVALID_PAYLOAD,
args=[
u'error return value from invoked procedure "{0}" could not be serialized: {1}'
.format(registration.procedure, e)
])
self._transport.send(reply)
# we have handled the error, so we eat it
return None
self._invocations[msg.request] = InvocationRequest(
msg.request, on_reply)
txaio.add_callbacks(on_reply, success, error)
elif isinstance(msg, message.Interrupt):
if msg.request not in self._invocations:
raise ProtocolError(
"INTERRUPT received for non-pending invocation {0}".
format(msg.request))
else:
# noinspection PyBroadException
try:
self._invocations[msg.request].cancel()
except Exception:
# XXX can .cancel() return a Deferred/Future?
try:
self.onUserError(
txaio.create_failure(),
"While cancelling call.",
)
except:
pass
finally:
del self._invocations[msg.request]
elif isinstance(msg, message.Registered):
if msg.request in self._register_reqs:
# get and pop outstanding register request
request = self._register_reqs.pop(msg.request)
# create new registration if not yet tracked
if msg.registration not in self._registrations:
registration = Registration(self, msg.registration,
request.procedure,
request.endpoint)
self._registrations[msg.registration] = registration
else:
raise ProtocolError(
"REGISTERED received for already existing registration ID {0}"
.format(msg.registration))
txaio.resolve(request.on_reply, registration)
else:
raise ProtocolError(
"REGISTERED received for non-pending request ID {0}".
format(msg.request))
elif isinstance(msg, message.Unregistered):
if msg.request in self._unregister_reqs:
# get and pop outstanding subscribe request
request = self._unregister_reqs.pop(msg.request)
# if the registration still exists, mark as inactive and remove ..
if request.registration_id in self._registrations:
self._registrations[
request.registration_id].active = False
del self._registrations[request.registration_id]
# resolve deferred/future for unregistering successfully
txaio.resolve(request.on_reply)
else:
raise ProtocolError(
"UNREGISTERED received for non-pending request ID {0}".
format(msg.request))
elif isinstance(msg, message.Error):
# remove outstanding request and get the reply deferred/future
on_reply = None
# ERROR reply to CALL
if msg.request_type == message.Call.MESSAGE_TYPE and msg.request in self._call_reqs:
on_reply = self._call_reqs.pop(msg.request).on_reply
# ERROR reply to PUBLISH
elif msg.request_type == message.Publish.MESSAGE_TYPE and msg.request in self._publish_reqs:
on_reply = self._publish_reqs.pop(msg.request).on_reply
# ERROR reply to SUBSCRIBE
elif msg.request_type == message.Subscribe.MESSAGE_TYPE and msg.request in self._subscribe_reqs:
on_reply = self._subscribe_reqs.pop(msg.request).on_reply
# ERROR reply to UNSUBSCRIBE
elif msg.request_type == message.Unsubscribe.MESSAGE_TYPE and msg.request in self._unsubscribe_reqs:
on_reply = self._unsubscribe_reqs.pop(msg.request).on_reply
# ERROR reply to REGISTER
elif msg.request_type == message.Register.MESSAGE_TYPE and msg.request in self._register_reqs:
on_reply = self._register_reqs.pop(msg.request).on_reply
# ERROR reply to UNREGISTER
elif msg.request_type == message.Unregister.MESSAGE_TYPE and msg.request in self._unregister_reqs:
on_reply = self._unregister_reqs.pop(msg.request).on_reply
if on_reply:
txaio.reject(on_reply, self._exception_from_message(msg))
else:
raise ProtocolError(
"WampAppSession.onMessage(): ERROR received for non-pending request_type {0} and request ID {1}"
.format(msg.request_type, msg.request))
else:
raise ProtocolError("Unexpected message {0}".format(
msg.__class__))
def some_method(*args, **kw):
return types.CallResult("greetings", "fellow", "human", dict())