csu3_am335x/EVSE/GPL/mosquitto-2.0.13/test/broker/12-prop-response-topic.py

#!/usr/bin/env python3

# client 1 subscribes to normal-topic
# client 2 susbscribes to response-topic
# client 2 publishes message to normal-topic with response-topic property
# client 1 receives message, publishes a response on response-topic
# client 2 receives message, checks payload

from mosq_test_helper import *

rc = 1

keepalive = 10

connect_packet1 = mosq_test.gen_connect("client1", proto_ver=5, keepalive=keepalive)
connect_packet2 = mosq_test.gen_connect("client2", proto_ver=5, keepalive=keepalive)
connack_packet = mosq_test.gen_connack(rc=0, proto_ver=5)

subscribe_packet1 = mosq_test.gen_subscribe(mid=1, topic="normal/topic", qos=0, proto_ver=5)
subscribe_packet2 = mosq_test.gen_subscribe(mid=1, topic="response/topic", qos=0, proto_ver=5)
suback_packet = mosq_test.gen_suback(mid=1, qos=0, proto_ver=5)

props = mqtt5_props.gen_string_prop(mqtt5_props.PROP_RESPONSE_TOPIC, "response/topic")
publish_packet2 = mosq_test.gen_publish(topic="normal/topic", qos=0, payload="2", proto_ver=5, properties=props)

publish_packet1 = mosq_test.gen_publish(topic="response/topic", qos=0, payload="22", proto_ver=5)

disconnect_client_packet = mosq_test.gen_disconnect(proto_ver=5, properties=props)

disconnect_server_packet = mosq_test.gen_disconnect(proto_ver=5, reason_code=130)

port = mosq_test.get_port()
broker = mosq_test.start_broker(filename=os.path.basename(__file__), port=port)

try:
    sock1 = mosq_test.do_client_connect(connect_packet1, connack_packet, port=port)
    sock2 = mosq_test.do_client_connect(connect_packet2, connack_packet, port=port)

    mosq_test.do_send_receive(sock1, subscribe_packet1, suback_packet, "subscribe1")
    mosq_test.do_send_receive(sock2, subscribe_packet2, suback_packet, "subscribe2")

    sock2.send(publish_packet2)
    mosq_test.expect_packet(sock1, "publish1", publish_packet2)
    # FIXME - it would be better to extract the property and payload, even though we know them
    sock1.send(publish_packet1)
    mosq_test.expect_packet(sock2, "publish2", publish_packet1)
    rc = 0

    sock1.close()
    sock2.close()
except mosq_test.TestError:
    pass
finally:
    broker.terminate()
    broker.wait()
    (stdo, stde) = broker.communicate()
    if rc:
        print(stde.decode('utf-8'))

exit(rc)