[
https://issues.apache.org/jira/browse/PROTON-2044?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Andreas Fendt updated PROTON-2044:
----------------------------------
Description:
I'm using following python code to send messages to the devices which are
connected to the azure iot hub:
{code:python}
import json
from base64 import b64encode, b64decode
from hashlib import sha256
from hmac import HMAC
from time import time
from urllib.parse import quote_plus, urlencode
from proton import ProtonException, Message
from proton.utils import BlockingConnection
class IotHub:
def __init__(self):
self._hostname = f"example-hub.azure-devices.net"
self._username = f"[email protected]"
self._blocking_connection = None
self._sender = None
self.connect()
@staticmethod
def generate_sas_token(uri: str, policy: str, key: str, expiry: float =
None):
if not expiry:
expiry = time() + 3600 # Default to 1 hour.
encoded_uri = quote_plus(uri)
ttl = int(expiry)
sign_key = f"{encoded_uri}\n{ttl}"
signature = b64encode(HMAC(b64decode(key), sign_key.encode(),
sha256).digest())
result = {"sr": uri, "sig": signature, "se": str(ttl)}
if policy:
result["skn"] = policy
return f"SharedAccessSignature {urlencode(result)}"
def connect(self):
# create credentials
password = self.generate_sas_token(self._hostname,
"iothubowner", "key",
time() + 31557600) # ttl = 1 Year
# establish connection
self._blocking_connection =
BlockingConnection(f"amqps://{self._hostname}", allowed_mechs="PLAIN",
user=self._username,
password=password,
heartbeat=30)
self._sender =
self._blocking_connection.create_sender("/messages/devicebound")
def send(self, message: dict, serial_number: str):
message =
Message(address="/devices/{serial_number}/messages/devicebound".format(serial_number=serial_number),
body=bytes(json.dumps(message, separators=(",",
":")), "utf-8"))
message.inferred = True # disable message encoding
self._sender.send(message, timeout=20)
{code}
The problem is now that when I don't send any message for some seconds I get
following exepction while sending a message:
{code:java}
Connection amqps://example-hub.azure-devices.net:amqps disconnected:
Condition('amqp:resource-limit-exceeded', 'local-idle-timeout expired')
{code}
Whats the reason for that? How can I solve that?
was:
I'm using following python code to send messages to the devices which are
connected to the azure iot hub:
{code:java}
import json
from base64 import b64encode, b64decode
from hashlib import sha256
from hmac import HMAC
from time import time
from urllib.parse import quote_plus, urlencode
from proton import ProtonException, Message
from proton.utils import BlockingConnection
class IotHub:
def __init__(self):
self._hostname = f"example-hub.azure-devices.net"
self._username = f"[email protected]"
self._blocking_connection = None
self._sender = None
self.connect()
@staticmethod
def generate_sas_token(uri: str, policy: str, key: str, expiry: float =
None):
if not expiry:
expiry = time() + 3600 # Default to 1 hour.
encoded_uri = quote_plus(uri)
ttl = int(expiry)
sign_key = f"{encoded_uri}\n{ttl}"
signature = b64encode(HMAC(b64decode(key), sign_key.encode(),
sha256).digest())
result = {"sr": uri, "sig": signature, "se": str(ttl)}
if policy:
result["skn"] = policy
return f"SharedAccessSignature {urlencode(result)}"
def connect(self):
# create credentials
password = self.generate_sas_token(self._hostname,
"iothubowner", "key",
time() + 31557600) # ttl = 1 Year
# establish connection
self._blocking_connection =
BlockingConnection(f"amqps://{self._hostname}", allowed_mechs="PLAIN",
user=self._username,
password=password,
heartbeat=30)
self._sender =
self._blocking_connection.create_sender("/messages/devicebound")
def send(self, message: dict, serial_number: str):
"""
Send proton Message to AMQP queue
"""
message =
Message(address="/devices/{serial_number}/messages/devicebound".format(serial_number=serial_number),
body=bytes(json.dumps(message, separators=(",",
":")), "utf-8"))
message.inferred = True # disable message encoding
self._sender.send(message, timeout=20)
{code}
The problem is now that when I don't send any message for some seconds I get
following exepction while sending a message:
{code:java}
Connection amqps://example-hub.azure-devices.net:amqps disconnected:
Condition('amqp:resource-limit-exceeded', 'local-idle-timeout expired')
{code}
Whats the reason for that? How can I solve that?
> Azure IoT Hub local-idle-timeout expired
> ----------------------------------------
>
> Key: PROTON-2044
> URL: https://issues.apache.org/jira/browse/PROTON-2044
> Project: Qpid Proton
> Issue Type: Bug
> Components: python-binding
> Affects Versions: proton-c-0.24.0
> Environment: Operating System: Windows
> Python: 3.6.4
> qpid-proton: 0.24.0
> Reporter: Andreas Fendt
> Priority: Major
> Fix For: proton-c-0.24.0
>
>
> I'm using following python code to send messages to the devices which are
> connected to the azure iot hub:
> {code:python}
> import json
> from base64 import b64encode, b64decode
> from hashlib import sha256
> from hmac import HMAC
> from time import time
> from urllib.parse import quote_plus, urlencode
> from proton import ProtonException, Message
> from proton.utils import BlockingConnection
> class IotHub:
> def __init__(self):
> self._hostname = f"example-hub.azure-devices.net"
> self._username = f"[email protected]"
> self._blocking_connection = None
> self._sender = None
> self.connect()
> @staticmethod
> def generate_sas_token(uri: str, policy: str, key: str, expiry: float =
> None):
> if not expiry:
> expiry = time() + 3600 # Default to 1 hour.
> encoded_uri = quote_plus(uri)
> ttl = int(expiry)
> sign_key = f"{encoded_uri}\n{ttl}"
> signature = b64encode(HMAC(b64decode(key), sign_key.encode(),
> sha256).digest())
> result = {"sr": uri, "sig": signature, "se": str(ttl)}
> if policy:
> result["skn"] = policy
> return f"SharedAccessSignature {urlencode(result)}"
> def connect(self):
> # create credentials
> password = self.generate_sas_token(self._hostname,
> "iothubowner", "key",
> time() + 31557600) # ttl = 1 Year
> # establish connection
> self._blocking_connection =
> BlockingConnection(f"amqps://{self._hostname}", allowed_mechs="PLAIN",
> user=self._username,
> password=password,
> heartbeat=30)
> self._sender =
> self._blocking_connection.create_sender("/messages/devicebound")
> def send(self, message: dict, serial_number: str):
> message =
> Message(address="/devices/{serial_number}/messages/devicebound".format(serial_number=serial_number),
> body=bytes(json.dumps(message, separators=(",",
> ":")), "utf-8"))
> message.inferred = True # disable message encoding
> self._sender.send(message, timeout=20)
> {code}
> The problem is now that when I don't send any message for some seconds I get
> following exepction while sending a message:
> {code:java}
> Connection amqps://example-hub.azure-devices.net:amqps disconnected:
> Condition('amqp:resource-limit-exceeded', 'local-idle-timeout expired')
> {code}
> Whats the reason for that? How can I solve that?
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