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#!/usr/bin/python3
# -*- coding: utf-8 -*-
# Copyright (c) 2017 Jon Levell <levell@uk.ibm.com>
#
# All rights reserved. This program and the accompanying materials
# are made available under the terms of the Eclipse Distribution License v1.0
# which accompanies this distribution.
#
# The Eclipse Distribution License is available at
# http://www.eclipse.org/org/documents/edl-v10.php.
#
# All rights reserved.
# This shows a example of an MQTT subscriber with the ability to use
# user name, password CA certificates based on command line arguments
import argparse
import os
import ssl
import paho.mqtt.client as mqtt
parser = argparse.ArgumentParser()
parser.add_argument('-H', '--host', required=False, default="mqtt.eclipseprojects.io")
parser.add_argument('-t', '--topic', required=False, default="$SYS/#")
parser.add_argument('-q', '--qos', required=False, type=int, default=0)
parser.add_argument('-c', '--clientid', required=False, default=None)
parser.add_argument('-u', '--username', required=False, default=None)
parser.add_argument('-d', '--disable-clean-session', action='store_true', help="disable 'clean session' (sub + msgs not cleared when client disconnects)")
parser.add_argument('-p', '--password', required=False, default=None)
parser.add_argument('-P', '--port', required=False, type=int, default=None, help='Defaults to 8883 for TLS or 1883 for non-TLS')
parser.add_argument('-k', '--keepalive', required=False, type=int, default=60)
parser.add_argument('-s', '--use-tls', action='store_true')
parser.add_argument('--insecure', action='store_true')
parser.add_argument('-F', '--cacerts', required=False, default=None)
parser.add_argument('--tls-version', required=False, default=None, help='TLS protocol version, can be one of tlsv1.2 tlsv1.1 or tlsv1\n')
parser.add_argument('-D', '--debug', action='store_true')
args, unknown = parser.parse_known_args()
def on_connect(mqttc, obj, flags, reason_code, properties):
print("reason_code: " + str(reason_code))
def on_message(mqttc, obj, msg):
print(msg.topic + " " + str(msg.qos) + " " + str(msg.payload))
def on_publish(mqttc, obj, mid):
print("mid: " + str(mid))
def on_subscribe(mqttc, obj, mid, reason_code_list, properties):
print("Subscribed: " + str(mid) + " " + str(reason_code_list))
def on_log(mqttc, obj, level, string):
print(string)
usetls = args.use_tls
if args.cacerts:
usetls = True
port = args.port
if port is None:
if usetls:
port = 8883
else:
port = 1883
mqttc = mqtt.Client(mqtt.CallbackAPIVersion.VERSION2, args.clientid,clean_session = not args.disable_clean_session)
if usetls:
if args.tls_version == "tlsv1.2":
tlsVersion = ssl.PROTOCOL_TLSv1_2
elif args.tls_version == "tlsv1.1":
tlsVersion = ssl.PROTOCOL_TLSv1_1
elif args.tls_version == "tlsv1":
tlsVersion = ssl.PROTOCOL_TLSv1
elif args.tls_version is None:
tlsVersion = None
else:
print ("Unknown TLS version - ignoring")
tlsVersion = None
if not args.insecure:
cert_required = ssl.CERT_REQUIRED
else:
cert_required = ssl.CERT_NONE
mqttc.tls_set(ca_certs=args.cacerts, certfile=None, keyfile=None, cert_reqs=cert_required, tls_version=tlsVersion)
if args.insecure:
mqttc.tls_insecure_set(True)
if args.username or args.password:
mqttc.username_pw_set(args.username, args.password)
mqttc.on_message = on_message
mqttc.on_connect = on_connect
mqttc.on_publish = on_publish
mqttc.on_subscribe = on_subscribe
if args.debug:
mqttc.on_log = on_log
print("Connecting to "+args.host+" port: "+str(port))
mqttc.connect(args.host, port, args.keepalive)
mqttc.subscribe(args.topic, args.qos)
mqttc.loop_forever()
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