def mqtt_on_message(client: mqtt.Client, userdata: Any,
msg: mqtt.MQTTMessage) -> None:
"""
MQTT Callback for when a PUBLISH message is received from the server.
:param client: Class instance of connection to server.
:param userdata: User-defined data passed to callbacks
:param msg: Contains payload, topic, qos, retain
"""
payload = Message.unpack(msg.payload)
print(f'Received: {payload}')
# TODO: validate origin format
profile, broker_socket = payload.origin.rsplit("@", 1)
# Copy necessary headers
header = {
"socket": broker_socket,
"correlationID": str(payload.request_id),
"profile": profile,
"encoding": payload.serialization,
"transport": "mqtt"
}
# Connect and publish to internal buffer
exchange = "orchestrator"
route = "response"
producer = Producer(os.environ.get("QUEUE_HOST", "queue"),
os.environ.get("QUEUE_PORT", "5672"))
producer.publish(headers=header,
message=payload.content,
exchange=exchange,
routing_key=route)
print(
f"Received: {payload} \nPlaced message onto exchange [{exchange}] queue [{route}]."
)
def render_POST_advanced(self, request, response):
# retrieve Content_type stored as dict of types:values (ex. "application/json": 50)
encoding = [k for k, v in defines.Content_types.items() if v == request.content_type]
encoding = "json" if len(encoding) != 1 else encoding[0].split("/")[1]
# read custom options added for O.I.F. and retrieve them based on their number
# opts = {o.name: o.value for o in request.options}
profile_opt = list(filter(lambda o: o.number == 8, request.options))
route = profile_opt[0].value if len(profile_opt) == 1 else None
socket_opt = list(filter(lambda o: o.number == 3, request.options))
socket = socket_opt[0].value if len(socket_opt) == 1 else None
print(f"{encoding}-{type(encoding)} -- {route}-{type(route)}")
if encoding and route:
print(f"Sending msg to {route}")
# Create headers for the orchestrator from the request
headers = dict(
correlationID=request.mid,
socket=socket,
encoding=encoding,
transport="coap"
# orchestratorID="orchid1234", # orchestratorID is currently an unused field, this is a placeholder
)
# Send request to actuator
try:
producer = Producer(os.environ.get("QUEUE_HOST", "localhost"), os.environ.get("QUEUE_PORT", "5672"))
producer.publish(
message=decode_msg(request.payload, encoding),
headers=headers,
exchange="actuator",
routing_key=route
)
response.payload = encode_msg({
"status": 200,
"status_text": "received"
}, encoding)
response.code = defines.Codes.CONTENT.number
except Exception as e:
print(e)
response.payload = e
return self, response
else:
print(f"Not enough info: {encoding} - {route}")
response.payload = encode_msg({
"status": 400,
"status_text": "Not enough data to send message to actuator"
}, encoding)
response.code = defines.Codes.BAD_REQUEST.number
return self, response
def result():
encode = re.search(r"(?<=\+)(.*?)(?=\;)",
request.headers["Content-type"]).group(
1) # message encoding
corr_id = request.headers["X-Request-ID"] # correlation ID
status = request.headers['Status']
profile, device_socket = request.headers["From"].rsplit("@", 1)
# profile used, device IP:port
data = safe_json({
"headers": dict(request.headers),
"content": safe_json(request.data.decode('utf-8'))
})
print(
f"Received {status} response from {profile}@{device_socket} - {data}")
print("Writing to buffer.")
producer = Producer()
producer.publish(
message=decode_msg(request.data, encode), # message being decoded
headers={
"socket": device_socket,
"correlationID": corr_id,
"profile": profile,
"encoding": encode,
"transport": "https"
},
exchange="orchestrator",
routing_key="response")
return make_response(
# Body
encode_msg({
"status": 200,
"status_text": "received"
}, encode),
# Status Code
200,
# Headers
{
"Content-type": f"application/openc2-rsp+{encode};version=1.0",
"Status":
200, # Numeric status code supplied by Actuator's OpenC2-Response
"X-Request-ID": corr_id,
"Date":
f"{datetime.utcnow():%a, %d %b %Y %H:%M:%S GMT}", # RFC7231-7.1.1.1 -> Sun, 06 Nov 1994 08:49:37 GMT
# "From": f"{profile}@{device_socket}",
# "Host": f"{orc_id}@{orc_socket}",
})
def send_error_response(e, header):
"""
If error occurs before leaving the transport on the orchestrator side, then send back a message
response to the internal buffer indicating so.
:param e: Exception thrown
:param header: Include headers which would have been sent for Orchestrator to read.
"""
producer = Producer(os.environ.get("QUEUE_HOST", "localhost"),
os.environ.get("QUEUE_PORT", "5672"))
err = json.dumps(str(e))
print(f"Send error response: {err}")
producer.publish(headers=header,
message=err,
exchange="orchestrator",
routing_key="response")
def on_message(client: mqtt.Client, userdata: Any,
message: mqtt.MQTTMessage):
"""
MQTT Callback for when a PUBLISH message is received from the broker, forwards to AMQP buffer
:param client: Class instance of connection to server.
:param userdata: User-defined data passed to callbacks
:param message: Contains payload, topic, qos, retain
"""
payload = Message.unpack(message.payload)
print(f'Received: {payload}')
# copy necessary headers
headers = {
"socket": None, # broker_socket,
"correlationID": str(payload.request_id),
"orchestratorID": payload.origin.rsplit("@", 1)[0],
"encoding": payload.serialization,
"profile": None, # profile,
"transport": "mqtt"
}
# Connect and publish to internal buffer
exchange = "actuator"
producer = Producer(os.environ.get("QUEUE_HOST", "localhost"),
os.environ.get("QUEUE_PORT", "5672"))
for recipient in payload.recipients:
profile, broker_socket = recipient.rsplit("@", 1)
headers.update(
socket=broker_socket,
profile=profile,
)
producer.publish(headers=headers,
message=payload.content,
exchange=exchange,
routing_key=profile)
print(
f"Received: {payload} \nPlaced message onto exchange [{exchange}] queue [{profile}]."
)
def on_message(act: Actuator, prod: Producer, body, message):
"""
Function that is called when a message is received from the queue/buffer
:param act: actuator instance
:param prod: producer to send response
:param body: encoded message
:param message: message instance from queue
"""
headers = getattr(message, "headers", {})
headers.setdefault("profile", act.profile)
msg_id = headers.get('correlationID', '')
encoding = headers.get('encoding', 'json')
msg = decode_msg(body, encoding)
msg_rsp = act.action(msg_id=msg_id, msg=msg)
print(f"{act} -> received: {msg}")
print(f"{act} -> response: {msg_rsp}")
if msg_rsp:
prod.publish(headers=headers,
message=encode_msg(msg_rsp, encoding),
exchange='transport',
routing_key=headers.get('transport', '').lower())
def on_message(client, userdata, msg):
"""
MQTT Callback for when a PUBLISH message is received from the broker, forwards to AMQP buffer
:param client: Class instance of connection to server.
:param userdata: User-defined data passed to callbacks
:param msg: Contains payload, topic, qos, retain
"""
payload = json.loads(msg.payload)
payload_header = payload.get("header", {})
encoding = re.search(r"(?<=\+)(.*?)(?=;)",
payload_header.get("content_type", "")).group(1)
profile, broker_socket = payload_header.get("to", "").rsplit("@", 1)
orc_id = payload_header.get("from", "").rsplit("@", 1)[0]
corr_id = payload_header.get("correlationID", "")
# copy necessary headers
header = {
"socket": broker_socket,
"correlationID": corr_id,
"orchestratorID": orc_id,
"encoding": encoding,
"profile": profile,
"transport": "mqtt"
}
# Connect and publish to internal buffer
exchange = "actuator"
producer = Producer(os.environ.get("QUEUE_HOST", "localhost"),
os.environ.get("QUEUE_PORT", "5672"))
producer.publish(headers=header,
message=payload.get("body", ""),
exchange=exchange,
routing_key=profile)
print(
f"Received: {payload} \nPlaced message onto exchange [{exchange}] queue [{profile}]."
)
def render_POST_advanced(self, request, response):
# retrieve Content_type stored as dict of types:values (ex. "application/json": 50)
encoding = [
k for k, v in defines.Content_types.items()
if v == request.content_type
]
encoding = "json" if len(encoding) != 1 else encoding[0].split("/")[1]
# read custom options added for O.I.F. and retrieve them based on their number
# opts = {o.name: o.value for o in request.options}
# Create headers for the orchestrator from the request
headers = dict(
correlationID=f"{request.mid:x}",
socket=(request.source[0] + ":" + str(request.source[1])),
encoding=encoding,
transport="coap",
# orchestratorID="orchid1234", # orchestratorID is currently an unused field, this is a placeholder
)
# Send response back to Orchestrator
producer = Producer(os.environ.get("QUEUE_HOST", "localhost"),
os.environ.get("QUEUE_PORT", "5672"))
producer.publish(message=decode_msg(request.payload, encoding),
headers=headers,
exchange="orchestrator",
routing_key="response")
# build and send response
response.payload = encode_msg(
{
"status": 200,
"status_text": "received"
}, encoding)
response.code = defines.Codes.CONTENT.number
return self, response
def process_message(body, message):
"""
Callback when we receive a message from internal buffer to publish to waiting flask.
:param body: Contains the message to be sent.
:param message: Contains data about the message as well as headers
"""
producer = Producer()
body = body if isinstance(body, dict) else safe_json(body)
rcv_headers = message.headers
orc_socket = rcv_headers["source"]["transport"]["socket"] # orch IP:port
orc_id = rcv_headers["source"]["orchestratorID"] # orchestrator ID
corr_id = rcv_headers["source"]["correlationID"] # correlation ID
for device in rcv_headers["destination"]:
device_socket = device["socket"] # device IP:port
encoding = device["encoding"] # message encoding
if device_socket and encoding and orc_socket:
for profile in device["profile"]:
print(f"Sending command to {profile}@{device_socket}")
rtn_headers = {
"socket": device_socket,
"correlationID": corr_id,
"profile": profile,
"encoding": encoding,
"transport": "https"
}
try:
rslt = requests.post(
url=f"http://{device_socket}",
headers={
"Content-type": f"application/openc2-cmd+{encoding};version=1.0",
# Numeric status code supplied by Actuator's OpenC2-Response
# "Status": ...,
"X-Request-ID": corr_id,
# RFC7231-7.1.1.1 -> Sun, 06 Nov 1994 08:49:37 GMT
"Date": f"{datetime.utcnow():%a, %d %b %Y %H:%M:%S GMT}",
"From": f"{orc_id}@{orc_socket}",
# "Host": f"{profile}@{device_socket}"
},
data=encode_msg(body, encoding) # command being encoded
)
data = {
"headers": dict(rslt.headers),
"content": decode_msg(rslt.content.decode('utf-8'), encoding)
}
print(f"Response from request: {rslt.status_code} - {data}")
# TODO: UPDATE HEADERS WITH RESPONSE INFO
response = safe_json(data['content']) if isinstance(data['content'], dict) else data['content']
except requests.exceptions.ConnectionError as err:
response = str(getattr(err, "message", err))
rtn_headers["error"] = True
print(f"Connection error: {err}")
except json.decoder.JSONDecodeError as err:
response = str(getattr(err, "message", err))
rtn_headers["error"] = True
print(f"Message error: {err}")
except Exception as err:
response = str(getattr(err, "message", err))
rtn_headers["error"] = True
print(f"HTTP error: {err}")
producer.publish(
message=response,
headers=rtn_headers,
exchange="orchestrator",
routing_key="response"
)
else:
response = "Destination/Encoding/Orchestrator Socket of command not specified"
rcv_headers["error"] = True
print(response)
producer.publish(
message=str(response),
headers=rcv_headers,
exchange="orchestrator",
routing_key="response"
)
class MessageQueue:
_auth = FrozenDict({'username': '******', 'password': '******'})
_exchange = 'orchestrator'
_consumerKey = 'response'
_producerExchange = 'producer_transport'
def __init__(self,
hostname='127.0.0.1',
port=5672,
auth=_auth,
exchange=_exchange,
consumer_key=_consumerKey,
producer_exchange=_producerExchange,
callbacks=None):
"""
Message Queue - holds a consumer class and producer class for ease of use
:param hostname: server ip/hostname to connect
:param port: port the AMQP Queue is listening
:param exchange: name of the default exchange
:param consumer_key: key to consumer
:param producer_exchange: ...
:param callbacks: list of functions to call on message receive
"""
self._exchange = exchange if isinstance(exchange,
str) else self._exchange
self._consumerKey = consumer_key if isinstance(
consumer_key, str) else self._consumerKey
self._producerExchange = producer_exchange if isinstance(
producer_exchange, str) else self._producerExchange
self._publish_opts = dict(host=hostname, port=safe_cast(port, int))
self._consume_opts = dict(host=hostname,
port=safe_cast(port, int),
exchange=self._exchange,
routing_key=self._consumerKey,
callbacks=callbacks)
self.producer = Producer(**self._publish_opts)
self.consumer = Consumer(**self._consume_opts)
def send(self, msg, headers, exchange=_producerExchange, routing_key=None):
"""
Publish a message to the specified que and transport
:param msg: message to be published
:param headers: header information for the message being sent
:param exchange: exchange name
:param routing_key: routing key name
:return: None
"""
headers = headers or {}
if routing_key is None:
raise ValueError('Routing Key cannot be None')
self.producer.publish(message=msg,
headers=headers,
exchange=exchange,
routing_key=routing_key)
def shutdown(self):
"""
Shutdown the connection to the queue
"""
self.consumer.shutdown()
self.consumer.join()
def result():
encode = re.search(r"(?<=\+)(.*?)(?=\;)", request.headers["Content-type"]).group(1) # message encoding
corr_id = request.headers["X-Request-ID"] # correlation ID
# data = decode_msg(request.data, encode) # message being decoded
# profile, device_socket = request.headers["Host"].rsplit("@", 1)
# profile used, device IP:port
orc_id, orc_socket = request.headers["From"].rsplit("@", 1)
# orchestrator ID, orchestrator IP:port
message = request.data
msg_json = decode_msg(message, encode)
data = safe_json({
"headers": dict(request.headers),
"content": safe_json(message.decode('utf-8'))
})
rsp = {
"status": 200,
"status_text": "received",
# command id??
}
# Basic verify against language schema??
# get destination actuator
actuators = list(msg_json.get('actuator', {}).keys())
print(f"Received command from {orc_id}@{orc_socket} - {data}")
if msg_json['action'] == "query" and "command" in msg_json['target']:
print("QUERY COMMAND")
cmd_id = msg_json['target']['command']
prev_cmd = state.get(cmd_id)
if prev_cmd:
rsp = {
"status_text": "previous command found",
"response": {
"command": prev_cmd[0]
}
}
else:
print("Writing to buffer")
producer = Producer()
queue_msg = {
"message": message,
"headers": {
"socket": orc_socket,
# "device": device_socket,
"correlationID": corr_id,
# "profile": profile,
"encoding": encode,
"orchestratorID": orc_id,
"transport": "http"
}
}
if len(actuators) == 0:
print('No NSIDs specified, Send to all')
try:
producer.publish(
**queue_msg,
exchange="actuator_all",
exchange_type="fanout",
routing_key="actuator_all"
)
except Exception as e:
print(f'Publish Error: {e}')
else:
print(f'NSIDs specified - {actuators}')
for act in actuators:
producer.publish(
**queue_msg,
exchange="actuator",
routing_key=act
)
print(f"Corr_id: {corr_id}")
for wait in range(0, MAX_WAIT):
print(f"Checking for response... {MAX_WAIT} - {wait}")
rsp_cmd = state.get(corr_id)
if rsp_cmd:
rsp = rsp_cmd[0]['body']
break
time.sleep(1)
return make_response(
# Body
encode_msg(rsp, encode),
# Status Code
200,
# Headers
{
"Content-type": f"application/openc2-rsp+{encode};version=1.0",
"Status": 200, # Numeric status code supplied by Actuator's OpenC2-Response
"X-Request-ID": corr_id,
"Date": f"{datetime.utcnow():%a, %d %b %Y %H:%M:%S GMT}", # RFC7231-7.1.1.1 -> Sun, 06 Nov 1994 08:49:37 GMT
# "From": f"{profile}@{device_socket}",
# "Host": f"{orc_id}@{orc_socket}",
}
)
def process_message(body, message):
"""
Callback when we receive a message from internal buffer to publish to waiting flask.
:param body: Contains the message to be sent.
:param message: Contains data about the message as well as headers
"""
http = urllib3.PoolManager(cert_reqs="CERT_NONE")
producer = Producer()
body = body if isinstance(body, dict) else safe_json(body)
rcv_headers = message.headers
orc_socket = rcv_headers["source"]["transport"]["socket"] # orch IP:port
orc_id = rcv_headers["source"]["orchestratorID"] # orchestrator ID
corr_id = rcv_headers["source"]["correlationID"] # correlation ID
for device in rcv_headers["destination"]:
device_socket = device["socket"] # device IP:port
encoding = device["encoding"] # message encoding
if device_socket and encoding and orc_socket:
for profile in device["profile"]:
print(f"Sending command to {profile}@{device_socket}")
try:
rsp = http.request(
method="POST",
url=f"https://{device_socket}",
body=encode_msg(body, encoding), # command being encoded
headers={
"Content-type": f"application/openc2-cmd+{encoding};version=1.0",
# "Status": ..., # Numeric status code supplied by Actuator's OpenC2-Response
"X-Request-ID": corr_id,
"Date": f"{datetime.utcnow():%a, %d %b %Y %H:%M:%S GMT}", # RFC7231-7.1.1.1 -> Sun, 06 Nov 1994 08:49:37 GMT
"From": f"{orc_id}@{orc_socket}",
"Host": f"{profile}@{device_socket}",
}
)
rsp_headers = dict(rsp.headers)
if "Content-type" in rsp_headers:
rsp_enc = re.sub(r"^application/openc2-(cmd|rsp)\+", "", rsp_headers["Content-type"])
rsp_enc = re.sub(r"(;version=\d+\.\d+)?$", "", rsp_enc)
else:
rsp_enc = "json"
rsp_headers = {
"socket": device_socket,
"correlationID": corr_id,
"profile": profile,
"encoding": rsp_enc,
"transport": "https"
}
data = {
"headers": rsp_headers,
"content": decode_msg(rsp.data.decode("utf-8"), rsp_enc)
}
print(f"Response from request: {rsp.status} - {safe_json(data)}")
producer.publish(message=data["content"], headers=rsp_headers, exchange="orchestrator", routing_key="response")
except Exception as err:
err = str(getattr(err, "message", err))
rcv_headers["error"] = True
producer.publish(message=err, headers=rcv_headers, exchange="orchestrator", routing_key="response")
print(f"HTTPS error: {err}")
else:
response = "Destination/Encoding/Orchestrator Socket of command not specified"
rcv_headers["error"] = True
producer.publish(message=str(response), headers=rcv_headers, exchange="orchestrator", routing_key="response")
print(response)
def process_message(body: Union[dict, str], message: kombu.Message) -> None:
"""
Callback when we receive a message from internal buffer to publish to waiting flask.
:param body: Contains the message to be sent.
:param message: Contains data about the message as well as headers
"""
producer = Producer()
body = body if isinstance(body, dict) else safe_json(body)
rcv_headers = message.headers
orc_socket = rcv_headers["source"]["transport"]["socket"] # orch IP:port
orc_id = rcv_headers["source"]["orchestratorID"] # orchestrator ID
corr_id = uuid.UUID(
rcv_headers["source"]["correlationID"]) # correlation ID
for device in rcv_headers["destination"]:
transport = transport_cache.cache.get(device["transport"])
device_socket = f"{transport['host']}:{transport['port']}" # device IP:port
encoding = device["encoding"] # message encoding
path = f"/{transport['path']}" if "path" in transport else ""
if device_socket and encoding and orc_socket:
with Auth(transport) as auth:
for profile in device["profile"]:
print(f"Sending command to {profile}@{device_socket}")
rtn_headers = {
"socket": device_socket,
"correlationID": str(corr_id),
"profile": profile,
"encoding": encoding,
"transport": "https"
}
request = Message(
recipients=[f"{profile}@{device_socket}"],
origin=f"{orc_id}@{orc_socket}",
# created=... auto generated
msg_type=MessageType.Request,
request_id=corr_id,
content_type=SerialFormats.from_value(encoding),
content=body)
prod_kwargs = {
"cert": (auth.clientCert, auth.clientKey)
if auth.clientCert and auth.clientKey else None,
"verify":
auth.caCert if auth.caCert else False
}
try:
rslt = requests.post(
url=
f"http{'s' if transport['prod'] else ''}://{device_socket}{path}",
headers={
"Content-Type":
f"application/openc2-cmd+{encoding};version=1.0",
# Numeric status code supplied by Actuator's OpenC2-Response
# "Status": ...,
"X-Request-ID": str(request.request_id),
# RFC7231-7.1.1.1 -> Sun, 06 Nov 1994 08:49:37 GMT
"Date":
f"{request.created:%a, %d %b %Y %H:%M:%S GMT}",
"From": request.origin,
# "Host": f"{profile}@{device_socket}"
},
data=request.serialize(), # command being encoded
**(prod_kwargs if transport["prod"] else {}))
response = Message.oc2_loads(rslt.content, encoding)
print(
f"Response from request: {rslt.status_code} - H:{dict(rslt.headers)} - C:{response}"
)
# TODO: UPDATE HEADERS WITH RESPONSE INFO
response = response.content
except requests.exceptions.ConnectionError as err:
response = str(getattr(err, "message", err))
rtn_headers["error"] = True
print(f"Connection error: {err}")
except json.decoder.JSONDecodeError as err:
response = str(getattr(err, "message", err))
rtn_headers["error"] = True
print(f"Message error: {err} - `{rslt.content}`")
except Exception as err:
response = str(getattr(err, "message", err))
rtn_headers["error"] = True
print(f"HTTPS error: {err}")
producer.publish(message=response,
headers=rtn_headers,
exchange="orchestrator",
routing_key="response")
else:
response = "Destination/Encoding/Orchestrator Socket of command not specified"
rcv_headers["error"] = True
print(response)
producer.publish(message=str(response),
headers=rcv_headers,
exchange="orchestrator",
routing_key="response")
def result():
encode = re.search(r"(?<=\+)(.*?)(?=\;)",
request.headers["Content-type"]).group(
1) # message encoding
corr_id = request.headers["X-Request-ID"] # correlation ID
# data = decode_msg(request.data, encode) # message being decoded
profile, device_socket = request.headers["Host"].rsplit("@", 1)
# profile used, device IP:port
orc_id, orc_socket = request.headers["From"].rsplit("@", 1)
# orchestrator ID, orchestrator IP:port
message = request.data
msg_json = decode_msg(message, encode)
data = safe_json({
"headers": dict(request.headers),
"content": safe_json(message.decode('utf-8'))
})
rsp = {
"status": 200,
"status_text": "received",
# command id??
}
print(f"Received command from {orc_id}@{orc_socket} - {data}")
if msg_json['action'] == "query" and "command" in msg_json['target']:
print("QUERY COMMAND")
cmd_id = msg_json['target']['command']
prev_cmd = state.get(cmd_id)
if prev_cmd:
rsp = {
"status_text": "previous command found",
"response": {
"command": prev_cmd
}
}
else:
print("Writing to buffer")
producer = Producer()
producer.publish(message=message,
headers={
"socket": orc_socket,
"device": device_socket,
"correlationID": corr_id,
"profile": profile,
"encoding": encode,
"orchestratorID": orc_id,
"transport": "https"
},
exchange="actuator",
routing_key=profile)
print(f"Corr_id: {corr_id}")
for wait in range(0, MAX_WAIT):
print(f"Checking for response... {MAX_WAIT} - {wait}")
rsp_cmd = state.get(corr_id)
if rsp_cmd:
rsp = rsp_cmd['body']
break
time.sleep(1)
return make_response(
# Body
encode_msg(rsp, encode),
# Status Code
200,
# Headers
{
"Content-type": f"application/openc2-rsp+{encode};version=1.0",
"Status":
200, # Numeric status code supplied by Actuator's OpenC2-Response
"X-Request-ID": corr_id,
"Date":
f"{datetime.utcnow():%a, %d %b %Y %H:%M:%S GMT}", # RFC7231-7.1.1.1 -> Sun, 06 Nov 1994 08:49:37 GMT
# "From": f"{profile}@{device_socket}",
# "Host": f"{orc_id}@{orc_socket}",
})
header = {
"socket": broker_socket,
"correlationID": str(payload.request_id),
"profile": profile,
"encoding": payload.serialization,
"transport": "mqtt"
}
# Connect and publish to internal buffer
exchange = "orchestrator"
route = "response"
producer = Producer(os.environ.get("QUEUE_HOST", "queue"),
os.environ.get("QUEUE_PORT", "5672"))
producer.publish(headers=header,
message=payload.content,
exchange=exchange,
routing_key=route)
print(
f"Received: {payload} \nPlaced message onto exchange [{exchange}] queue [{route}]."
)
except Exception as e:
print(f"Received: {msg.payload}")
print(f"MQTT message error: {e}")
def mqtt_on_log(client: mqtt.Client, userdata: List[str], level: int,
buf: str) -> None:
"""
MQTT Callback for when a PUBLISH message is received from the broker, forwards to AMQP buffer
:param client: Class instance of connection to server.
:param userdata: User-defined data passed to callbacks