def on_message(mqttc, userdata, msg):
print(msg.topic + " " + str(msg.payload))
# Get the response properties, abort if they're not given
props = msg.properties
if not hasattr(props, 'ResponseTopic') or not hasattr(
props, 'CorrelationData'):
print("No reply requested")
return
corr_id = props.CorrelationData
reply_to = props.ResponseTopic
# The command parameters are in the payload
nums = json.loads(msg.payload)
# The requested command is at the end of the topic
res = 0
if msg.topic.endswith("add"):
res = add(nums)
elif msg.topic.endswith("mult"):
res = mult(nums)
# Now we have the result, res, so send it back on the 'reply_to'
# topic using the same correlation ID as the request.
print("Sending response " + str(res) + " on '" + reply_to + "': " +
str(corr_id))
props = mqtt.Properties(PacketTypes.PUBLISH)
props.CorrelationData = corr_id
payload = json.dumps(res)
mqttc.publish(reply_to, payload, qos=1, properties=props)
def submit_cbor(self):
""" publish the data
read the topic from screen
read the message, convert it to cbor
add qos level & retain info
if command, then add return topic and corrolation id.
publish the data
"""
my_data = self.message_entry.get('1.0', tk.END)
cbor_data = None
if my_data is not None and len(my_data) > 2:
try:
json_data = json.loads(my_data)
except JSONDecodeError as e:
# do whatever you want
logger.log(logging.ERROR, e)
return
except TypeError as e:
# do whatever you want in this case
logger.log(logging.ERROR, e)
return
cbor_data = cbor.dumps(json_data)
my_topic = self.topic.get()
my_qos = self.level.get()
my_qos_int = int(my_qos)
my_retain = self.btn_var.get()
print(" ====> RETAIN", my_retain)
retain_flag = False
if my_retain == "1":
print("retain is true")
retain_flag = True
additional_data = " "
props = None
last_topic = my_topic.split("/")[-1]
if last_topic in ["C", "R", "U", "D", "N"]:
return_topic = self.app.client.my_udn
props = mqtt.Properties(PacketTypes.PUBLISH)
random_number = randrange(100000)
random_string = str(random_number)
props.CorrelationData = random_string.encode("utf-8")
props.ResponseTopic = return_topic
additional_data = "\ncorr Id: " + \
str(props.CorrelationData) + \
" Response Topic: " + props.ResponseTopic
my_string = "publish: " + str(self.topic.get()) + " QOS: " + my_qos + \
" Retain: " + my_retain + " " + my_data + additional_data
logger.log(logging.INFO, my_string)
topic_queue.append([props.CorrelationData, my_topic, None, None])
ret = self.app.client.publish(my_topic,
cbor_data,
my_qos_int,
retain_flag,
properties=props)
def submit_disc(self):
""" publish the oic/res discovery
publish the data
"""
my_data = "" # no input for discovery
cbor_data = None
if my_data is not None and len(my_data) > 2:
try:
json_data = json.loads(my_data)
except JSONDecodeError as e:
# do whatever you want
logger.log(logging.ERROR, e)
return
except TypeError as e:
# do whatever you want in this case
logger.log(logging.ERROR, e)
return
cbor_data = cbor.dumps(json_data)
my_topic = "OCF/*/oic%2Fres/R"
my_qos = self.level.get()
my_qos_int = int(my_qos)
my_retain = self.btn_var.get()
print(" ====> RETAIN", my_retain)
retain_flag = False
if my_retain == "1":
print("retain is true")
retain_flag = True
additional_data = " "
props = None
last_topic = my_topic.split("/")[-1]
if last_topic in ["C", "R", "U", "D", "N"]:
return_topic = self.app.client.my_udn
props = mqtt.Properties(PacketTypes.PUBLISH)
random_number = randrange(100000)
random_string = str(random_number)
props.CorrelationData = random_string.encode("utf-8")
props.ResponseTopic = return_topic
additional_data = "\ncorr Id: " + str(
props.CorrelationData
) + " Response Topic: " + props.ResponseTopic
my_string = "publish: " + str(
self.topic.get()
) + " QOS: " + my_qos + " Retain: " + my_retain + " " + my_data + additional_data
logger.log(logging.INFO, my_string)
topic_queue.append([props.CorrelationData, my_topic, None, None])
print(my_string)
ret = self.app.client.publish(my_topic,
cbor_data,
my_qos_int,
retain_flag,
properties=props)
def publish_url(client,
return_topic,
udn,
url,
command=None,
cb=None,
message=None):
"""publish the message
udn + url as topic with optional command
Args:
client (mqtt): mqtt client
return_topic (string): return topic
udn (string): udn of the target device
url (string): url of the target
command (string, optional): command e.g. CRUDN. Defaults to None.
cb (function name, optional): callback function. Defaults to None.
message (any, optional): message to be published . Defaults to None.
"""
my_url = url
my_qos_int = 0
retain_flag = False
cbor_data = message
if my_url[0] == "/":
my_url = my_url[1:]
my_url = my_url.replace("/", "%2F")
my_topic = "OCF/" + udn + "/" + my_url
if command is not None:
if command in ["C", "R", "U", "D", "N"]:
my_topic += "/" + command
else:
logger.log(logging.ERROR, "command not in CRUDN:" + command)
props = mqtt.Properties(PacketTypes.PUBLISH)
random_number = randrange(100000)
random_string = str(random_number)
props.CorrelationData = random_string.encode("utf-8")
props.ResponseTopic = return_topic
print(" publish_url publish request:", my_topic, random_string)
topic_queue.append([props.CorrelationData, my_topic, cb, udn])
ret = client.publish(my_topic,
cbor_data,
my_qos_int,
retain_flag,
properties=props)
def on_message(mqttc, userdata, msg):
print(msg.topic + " " + str(msg.payload))
#获取响应属性，如果没有给出则中止
props = msg.properties
if not hasattr(props, 'ResponseTopic') or not hasattr(
props, 'CorrelationData'):
print("No reply requested")
return
corr_id = props.CorrelationData
reply_to = props.ResponseTopic
#现在我们有了结果res，所以将其发送回'reply_to'
#个主题，使用与请求相同的相关性ID。
props = mqtt.Properties(PacketTypes.PUBLISH)
props.CorrelationData = corr_id
mqttc.publish(reply_to, msg.payload, qos=1, properties=props)
done = True
# Init MQTT client
client = mqtt.Client("Python test client", protocol=mqtt.MQTTv5)
# optional login data: client.username_pw_set("username","password")
client.on_message = on_message
client.on_connect = on_connect
# optional configure transport level security: client.tls_set(cert_reqs=mqtt.ssl.CERT_NONE,tls_version=mqtt.ssl.PROTOCOL_TLSv1_2)
client.connect("localhost",
1883) # or 8883 when in transport level security mode
client.loop_start()
client.subscribe("Python/response", qos=2)
# Send model
properties = mqtt.Properties(mqttpackettypes.PacketTypes.PUBLISH)
properties.ResponseTopic = "Python/response"
properties.UserProperty = (
"a", "2"
) # User properties can be used to identify response (Warteschlangensimulator will echo them in response message)
properties.UserProperty = ("c", "3")
client.publish("Warteschlangensimulator/task",
payload=model,
qos=2,
properties=properties)
print(
"Submitted work request together with response topic name and user properties"
)
# Wait
while not done:
print("USAGE: client_rpc_math.py [add|mult] n1 n2 ...")
sys.exit(1)
mqttc = mqtt.Client(client_id="", protocol=mqtt.MQTTv5)
mqttc.on_message = on_message
mqttc.on_connect = on_connect
mqttc.connect(host='localhost', clean_start=True)
mqttc.loop_start()
# Wait for connection to set `client_id`, etc.
while not mqttc.is_connected():
time.sleep(0.1)
# Properties for the request specify the ResponseTopic and CorrelationData
props = mqtt.Properties(PacketTypes.PUBLISH)
props.CorrelationData = corr_id
props.ResponseTopic = reply_to
# Uncomment to see what got set
#print("Client ID: "+client_id)
#print("Reply To: "+reply_to)
#print(props)
# The requested operation, 'add' or 'mult'
func = sys.argv[1]
# Gather the numeric parameters as an array of numbers
# These can be int's or float's
args = []
for s in sys.argv[2:]: