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#-------------------------------------------------------------------------
# Copyright (c) Microsoft Corporation. All rights reserved.
# Licensed under the MIT License. See License.txt in the project root for
# license information.
#--------------------------------------------------------------------------
import os
import logging
import sys
from base64 import b64encode, b64decode
from hashlib import sha256
from hmac import HMAC
from time import time
from uuid import uuid4
try:
from urllib import quote, quote_plus, urlencode #Py2
except Exception:
from urllib.parse import quote, quote_plus, urlencode
import uamqp
from uamqp import utils, errors
def get_logger(level):
uamqp_logger = logging.getLogger("uamqp")
if not uamqp_logger.handlers:
handler = logging.StreamHandler(stream=sys.stdout)
handler.setFormatter(logging.Formatter('%(asctime)s %(name)-12s %(levelname)-8s %(message)s'))
uamqp_logger.addHandler(handler)
uamqp_logger.setLevel(level)
return uamqp_logger
log = get_logger(logging.INFO)
def _generate_sas_token(uri, policy, key, expiry=None):
if not expiry:
expiry = time() + 3600 # Default to 1 hour.
encoded_uri = quote_plus(uri)
ttl = int(expiry)
sign_key = '%s\n%d' % (encoded_uri, ttl)
signature = b64encode(HMAC(b64decode(key), sign_key.encode('utf-8'), sha256).digest())
result = {
'sr': uri,
'sig': signature,
'se': str(ttl)}
if policy:
result['skn'] = policy
return 'SharedAccessSignature ' + urlencode(result)
def _build_iothub_amqp_endpoint_from_target(target):
hub_name = target['hostname'].split('.')[0]
endpoint = "{}@sas.root.{}".format(target['key_name'], hub_name)
endpoint = quote_plus(endpoint)
sas_token = _generate_sas_token(target['hostname'], target['key_name'],
target['access_key'], time() + 360)
endpoint = endpoint + ":{}@{}".format(quote_plus(sas_token), target['hostname'])
return endpoint
def test_iot_hub_send(live_iothub_config):
msg_content = b"hello world"
app_properties = {"test_prop_1": "value", "test_prop_2": "X"}
msg_props = uamqp.message.MessageProperties()
msg_props.to = '/devices/{}/messages/devicebound'.format(live_iothub_config['device'])
msg_props.message_id = str(uuid4())
message = uamqp.Message(msg_content, properties=msg_props, application_properties=app_properties)
operation = '/messages/devicebound'
endpoint = _build_iothub_amqp_endpoint_from_target(live_iothub_config)
target = 'amqps://' + endpoint + operation
log.info("Target: {}".format(target))
send_client = uamqp.SendClient(target, debug=False)
send_client.queue_message(message)
results = send_client.send_all_messages()
assert not [m for m in results if m == uamqp.constants.MessageState.SendFailed]
log.info("Message sent.")
if __name__ == '__main__':
config = {}
config['hostname'] = os.environ['IOTHUB_HOSTNAME']
config['device'] = os.environ['IOTHUB_DEVICE']
config['key_name'] = os.environ['IOTHUB_SAS_POLICY']
config['access_key'] = os.environ['IOTHUB_SAS_KEY']
test_iot_hub_send(config)
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