def _test_retained(self):
"""
The MQTT client can set and receive retained messages.
"""
reactor, router, server_factory, session_factory = build_mqtt_server()
client_transport, client_protocol, mqtt_pump = connect_mqtt_server(
server_factory)
client_transport.write(
Connect(client_id=u"testclient",
username=u"test123",
password=u"password",
flags=ConnectFlags(clean_session=False,
username=True,
password=True)).serialise())
client_transport.write(
Publish(duplicate=False,
qos_level=1,
retain=True,
topic_name=u"com/test/wamp",
packet_identifier=123,
payload=b'{}').serialise())
mqtt_pump.flush()
self.assertEqual(
client_protocol.data,
(ConnACK(session_present=False, return_code=0).serialise() +
PubACK(packet_identifier=123).serialise()))
client_protocol.data = b""
client_transport.write(
Subscribe(packet_identifier=1,
topic_requests=[
SubscriptionTopicRequest(
topic_filter=u"com/test/wamp", max_qos=0)
]).serialise())
mqtt_pump.flush()
self.assertEqual(
client_protocol.data,
SubACK(packet_identifier=1, return_codes=[0]).serialise())
client_protocol.data = b""
reactor.advance(0.1)
mqtt_pump.flush()
# This needs to be replaced with the real deal, see https://github.com/crossbario/crossbar/issues/885
self.assertEqual(
client_protocol.data,
Publish(duplicate=False,
qos_level=0,
retain=True,
topic_name=u"com/test/wamp",
payload=json.dumps(
{}, sort_keys=True).encode('utf8')).serialise())
def _test_basic_subscribe(self):
"""
The MQTT client can subscribe to a WAMP topic and get messages.
"""
reactor, router, server_factory, session_factory = build_mqtt_server()
client_transport, client_protocol, mqtt_pump = connect_mqtt_server(
server_factory)
session, pump = connect_application_session(
server_factory,
ApplicationSession,
component_config=ComponentConfig(realm="mqtt",
controller=MockContainer()))
client_transport.write(
Connect(client_id="testclient",
username="******",
password="******",
flags=ConnectFlags(clean_session=False,
username=True,
password=True)).serialise())
client_transport.write(
Subscribe(packet_identifier=1,
topic_requests=[
SubscriptionTopicRequest(
topic_filter="com/test/wamp", max_qos=0)
]).serialise())
mqtt_pump.flush()
self.assertEqual(
client_protocol.data,
(ConnACK(session_present=False, return_code=0).serialise() +
SubACK(packet_identifier=1, return_codes=[0]).serialise()))
client_protocol.data = b""
session.publish("com.test.wamp", "bar")
pump.flush()
reactor.advance(0.1)
mqtt_pump.flush()
self.assertEqual(
client_protocol.data,
Publish(duplicate=False,
qos_level=0,
retain=False,
topic_name="com/test/wamp",
payload=b'{"args":["bar"]}').serialise())
def test_exception_in_subscribe_drops_connection(self):
"""
Transient failures (like an exception from handler.process_subscribe)
will cause the connection it happened on to be dropped.
Compliance statement MQTT-4.8.0-2
"""
class SubHandler(BasicHandler):
@inlineCallbacks
def process_subscribe(self, event):
raise Exception("boom!")
h = SubHandler()
r, t, p, cp = make_test_items(h)
data = (Connect(client_id=u"test123",
flags=ConnectFlags(clean_session=True)).serialise() +
Subscribe(packet_identifier=1234,
topic_requests=[SubscriptionTopicRequest(u"a", 0)
]).serialise())
with LogCapturer("trace") as logs:
for x in iterbytes(data):
p.dataReceived(x)
sent_logs = logs.get_category("MQ501")
self.assertEqual(len(sent_logs), 1)
self.assertEqual(sent_logs[0]["log_level"], LogLevel.critical)
self.assertEqual(sent_logs[0]["log_failure"].value.args[0], "boom!")
events = cp.data_received(t.value())
self.assertEqual(len(events), 1)
self.assertTrue(t.disconnecting)
# We got the error, we need to flush it so it doesn't make the test
# error
self.flushLoggedErrors()