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app.py
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app.py
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# Copyright (c) 2010,2011 Roger Light <roger@atchoo.org>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# 3. Neither the name of mosquitto nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
import paho.mqtt.client as mqtt
import os, urlparse
# Define event callbacks
def on_connect(client, userdata, flags, rc):
print("rc: " + str(rc))
def on_message(client, obj, msg):
print(msg.topic + " " + str(msg.qos) + " " + str(msg.payload))
def on_publish(client, obj, mid):
print("mid: " + str(mid))
def on_subscribe(client, obj, mid, granted_qos):
print("Subscribed: " + str(mid) + " " + str(granted_qos))
def on_log(client, obj, level, string):
print(string)
mqttc = mqtt.Client()
# Assign event callbacks
mqttc.on_message = on_message
mqttc.on_connect = on_connect
mqttc.on_publish = on_publish
mqttc.on_subscribe = on_subscribe
# Uncomment to enable debug messages
#mqttc.on_log = on_log
# Parse CLOUDMQTT_URL (or fallback to localhost)
url_str = os.environ.get('CLOUDMQTT_URL', 'mqtt://localhost:1883')
url = urlparse.urlparse(url_str)
topic = url.path[1:] or 'test'
# Connect
mqttc.username_pw_set(url.username, url.password)
mqttc.connect(url.hostname, url.port)
# Start subscribe, with QoS level 0
mqttc.subscribe(topic, 0)
# Publish a message
mqttc.publish(topic, "my message")
# Continue the network loop, exit when an error occurs
rc = 0
while rc == 0:
rc = mqttc.loop()
print("rc: " + str(rc))