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An efficient APNs Client Library for Python/asyncio

License: Apache License 2.0

Python 100.00%

apns apple-push-notifications asyncio push-notifications python

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aioapns's Issues

Connections terminate with a reason of `Shutdown`

I have a service that uses this library. After a few hours I start getting the following message for all notifications:

2024-03-20 10:30:31.906 WARNING connection:on_connection_terminated:295 - Connection <aioapns.connection.APNsProductionClientProtocol object at 0x7fe3540def10> terminated: code=ErrorCodes.NO_ERROR, additional_data=b'{"reason":"Shutdown"}', last_stream_id=1

Restarting the service resolves the issue.

My process is as follows:

Create client

def get_apn_client(...):
   # ... code here
    return APNs(
        key=cfg.apn_key,
        key_id=cfg.apn_key_id,
        team_id=cfg.apn_team_id,
        topic=cfg.apn_topic,  # Bundle ID
        use_sandbox=use_sandbox
    )

Create event loop and send message to a specific user's devices

        loop = asyncio.get_event_loop()
        loop.run_until_complete(send_messages(self.client, devices, msg, context, origination))

Iterate over every device and send a notification

def send_messages(...):
    # ... code here

    for device in devices:
        request = NotificationRequest(
            device_token=device.deviceToken,
            message=message,
            notification_id=str(uuid4()),  # optional
            time_to_live=3,                # optional
            push_type=PushType.ALERT,      # optional
        )
        await client.send_notification(request)

This is not efficient at all, I understand. I shoehorned this into a non asyncio model. That will be fixed.

Regardless, I'm creating a new client every time I send new messages. Perhaps I have to cache the APNs client because of the connection pool? I see that the code automatically refreshes the token based on a TTL. Theoretically I can use the same client for all sends and it will automatically update the JWT as needed.

Send push-msg using dev cert

Hi, I try to send push-msg to my device. Device token generated for dev cert. I got strange error:

[2018-01-24 15:29:26] ERROR [aioamqp.protocol.run:340] error on dispatch
Traceback (most recent call last):
  File "/home/max/bot_project/mobile_mos_ru_push_server/venv/lib/python3.6/site-packages/h2/connection.py", line 224, in process_input
    func, target_state = self._transitions[(self.state, input_)]
KeyError: (<ConnectionState.CLOSED: 3>, <ConnectionInputs.SEND_HEADERS: 0>)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/max/bot_project/mobile_mos_ru_push_server/venv/lib/python3.6/site-packages/aioamqp/protocol.py", line 333, in run
    yield from self.dispatch_frame()
  File "/home/max/bot_project/mobile_mos_ru_push_server/venv/lib/python3.6/site-packages/aioamqp/protocol.py", line 288, in dispatch_frame
    yield from channel.dispatch_frame(frame)
  File "/home/max/bot_project/mobile_mos_ru_push_server/venv/lib/python3.6/site-packages/aioamqp/channel.py", line 107, in dispatch_frame
    yield from methods[(frame.class_id, frame.method_id)](frame)
  File "/home/max/bot_project/mobile_mos_ru_push_server/venv/lib/python3.6/site-packages/aioamqp/channel.py", line 641, in basic_deliver
    yield from callback(self, body, envelope, properties)
  File "/home/max/bot_project/mobile_mos_ru_push_server/push_server/core/push_msg_sender.py", line 57, in send_push_msg
    await app.apns.send_message(push_msg, device_data.token)
  File "/home/max/bot_project/mobile_mos_ru_push_server/push_server/core/clients/push_clients.py", line 120, in send_message
    await self.connection.send_notification(request)
  File "/home/max/bot_project/mobile_mos_ru_push_server/venv/lib/python3.6/site-packages/aioapns/client.py", line 10, in send_notification
    response = await self.pool.send_notification(request)
  File "/home/max/bot_project/mobile_mos_ru_push_server/venv/lib/python3.6/site-packages/aioapns/connection.py", line 321, in send_notification
    response = await connection.send_notification(request)
  File "/home/max/bot_project/mobile_mos_ru_push_server/venv/lib/python3.6/site-packages/aioapns/connection.py", line 132, in send_notification
    headers=headers
  File "/home/max/bot_project/mobile_mos_ru_push_server/venv/lib/python3.6/site-packages/h2/connection.py", line 761, in send_headers
    self.state_machine.process_input(ConnectionInputs.SEND_HEADERS)
  File "/home/max/bot_project/mobile_mos_ru_push_server/venv/lib/python3.6/site-packages/h2/connection.py", line 229, in process_input
    "Invalid input %s in state %s" % (input_, old_state)
h2.exceptions.ProtocolError: Invalid input ConnectionInputs.SEND_HEADERS in state ConnectionState.CLOSED

What is the key_id?

Connection Lost makes infinite blocking

Hello. I got lambda timeout in AWS Lambda environment.

I set max_connections=10, and logs at the end are below.

Closing connection <aioapns.connection.APNsProductionClientProtocol object at 0x7fa80ee74a10>
Connection <aioapns.connection.APNsProductionClientProtocol object at 0x7fa80ee74a10> lost! Error: None
Connection <aioapns.connection.APNsProductionClientProtocol object at 0x7fa80ee74a10> discarded
Connection released (total: 3)
Closing connection <aioapns.connection.APNsProductionClientProtocol object at 0x7fa80c331310>
Connection <aioapns.connection.APNsProductionClientProtocol object at 0x7fa80c331310> lost! Error: None
Connection <aioapns.connection.APNsProductionClientProtocol object at 0x7fa80c331310> discarded
Connection released (total: 2)
Closing connection <aioapns.connection.APNsProductionClientProtocol object at 0x7fa80e2a8510>
Connection <aioapns.connection.APNsProductionClientProtocol object at 0x7fa80e2a8510> lost! Error: None
Connection <aioapns.connection.APNsProductionClientProtocol object at 0x7fa80e2a8510> discarded
Connection released (total: 1)
Closing connection <aioapns.connection.APNsProductionClientProtocol object at 0x7fa80c076750>
Connection <aioapns.connection.APNsProductionClientProtocol object at 0x7fa80c076750> lost! Error: None
Connection <aioapns.connection.APNsProductionClientProtocol object at 0x7fa80c076750> discarded
Connection released (total: 0)

I think when connection is lost, new connection is not created and it blocks infinite.

In my local environment (M1 Macbook), another exception shown but it is just skipped and works well.

Connection <aioapns.connection.APNsProductionClientProtocol object at 0x10dde3048> terminated: code=ErrorCodes.NO_ERROR, additional_data=b'{"reason":"BadDeviceToken"}', last_stream_id=279
Invalid input ConnectionInputs.RECV_RST_STREAM in state ConnectionState.CLOSED
Traceback (most recent call last):
  File ".../lib/python3.7/site-packages/h2/connection.py", line 224, in process_input
    func, target_state = self._transitions[(self.state, input_)]
KeyError: (<ConnectionState.CLOSED: 3>, <ConnectionInputs.RECV_RST_STREAM: 16>)
During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/sym/.pyenv/versions/3.7.16/lib/python3.7/asyncio/sslproto.py", line 545, in data_received
    self._app_protocol.data_received(chunk)
  File ".../python3.7/site-packages/aioapns/connection.py", line 82, in data_received
    for event in self.conn.receive_data(data):
  File ".../python3.7/site-packages/h2/connection.py", line 1463, in receive_data
    events.extend(self._receive_frame(frame))
  File ".../python3.7/site-packages/h2/connection.py", line 1486, in _receive_frame
    frames, events = self._frame_dispatch_table[frame.__class__](frame)
  File ".../python3.7/site-packages/h2/connection.py", line 1786, in _receive_rst_stream_frame
    ConnectionInputs.RECV_RST_STREAM
  File ".../python3.7/site-packages/h2/connection.py", line 229, in process_input
    "Invalid input %s in state %s" % (input_, old_state)
h2.exceptions.ProtocolError: Invalid input ConnectionInputs.RECV_RST_STREAM in state ConnectionState.CLOSED

I think python-hyper/h2#1199 issue is related with it.
Do you have any idea about this? Thank you in advance.

How to form the certificate

Hi,

In Apple's examples with curl, one needs to provide both the key and the certificate for certificate-based push.
I don't see the configuration for a key here. Does it need to be included in the pem?

Get reason and timestamp in error responses for 410 status codes

Would it be possible to add the reason and timestamp coming from the API when there’s a 410 response status code?

See here: https://developer.apple.com/documentation/usernotifications/setting_up_a_remote_notification_server/handling_notification_responses_from_apns#3394529

Any compatibility with uvloop?

Is the package compatible with uvloop? Getting assertion error while trying to send a request.

https://github.com/Fatal1ty/aioapns/blob/master/aioapns/connection.py#L91

Fatal error on transport TCPTransport
protocol: <uvloop.loop.SSLProtocol object at 0xffffa482f320>
transport: <TCPTransport closed=False reading=False 0xaaab13595100>
Traceback (most recent call last):
  File "uvloop/handles/stream.pyx", line 1007, in uvloop.loop.__uv_stream_buffered_on_read
  File "uvloop/loop.pyx", line 109, in uvloop.loop.run_in_context1
  File "uvloop/sslproto.pyx", line 379, in uvloop.loop.SSLProtocol.buffer_updated
  File "uvloop/sslproto.pyx", line 505, in uvloop.loop.SSLProtocol._do_handshake
  File "uvloop/sslproto.pyx", line 541, in uvloop.loop.SSLProtocol._on_handshake_complete
  File "/tmp/.venv/lib/python3.10/site-packages/aioapns/connection.py", line 169, in connection_made
    super(APNsBaseClientProtocol, self).connection_made(transport)
  File "/tmp/.venv/lib/python3.10/site-packages/aioapns/connection.py", line 91, in connection_made
    assert isinstance(transport, asyncio.Transport)
AssertionError

Typing hints fail under CPython 3.7.1

Under Python 3.7.1, even importing the module fails..

Python 3.7.1 (default, Apr  3 2019, 17:03:30)
[GCC 4.8.5 20150623 (Red Hat 4.8.5-28)] on linux
Type "help", "copyright", "credits" or "license" for more information.

>>> import aioapns
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python3.7/site-packages/aioapns/__init__.py", line 1, in <module>
    from aioapns.client import APNs
  File "/usr/local/lib/python3.7/site-packages/aioapns/client.py", line 4, in <module>
    from aioapns.connection import APNsCertConnectionPool, APNsKeyConnectionPool
  File "/usr/local/lib/python3.7/site-packages/aioapns/connection.py", line 126, in <module>
    class APNsBaseClientProtocol(H2Protocol):
  File "/usr/local/lib/python3.7/site-packages/aioapns/connection.py", line 135, in APNsBaseClientProtocol
    auth_provider: Optional[AuthorizationHeaderProvider] = None):
  File "/usr/local/lib/python3.7/typing.py", line 755, in __getitem__
    return self.__getitem_inner__(params)
  File "/usr/local/lib/python3.7/typing.py", line 251, in inner
    return func(*args, **kwds)
  File "/usr/local/lib/python3.7/typing.py", line 774, in __getitem_inner__
    result = _type_check(result, msg)
  File "/usr/local/lib/python3.7/typing.py", line 135, in _type_check
    raise TypeError(f"Plain {arg} is not valid as type argument")
TypeError: Plain typing.NoReturn is not valid as type argument

Failing to connect to APNS - MaxAttemptsExceeded

My server is currently failing when using aioapns when trying to push a notification to a device. This was working a few days ago, but I'm now getting MaxAttemptsExceeded

2024-02-24T14:08:56.680 app[6e82e50c290e08] lhr [info] ERROR:asyncio:Exception in callback <bound method APNsBaseClientProtocol.connection_lost of <aioapns.connection.APNsDevelopmentClientProtocol object at 0x7fdc1ffc2680>>

2024-02-24T14:08:56.680 app[6e82e50c290e08] lhr [info] handle: <Handle APNsBaseClientProtocol.connection_lost>

2024-02-24T14:08:56.680 app[6e82e50c290e08] lhr [info] Traceback (most recent call last):

2024-02-24T14:08:56.680 app[6e82e50c290e08] lhr [info] File "uvloop/cbhandles.pyx", line 63, in uvloop.loop.Handle._run

2024-02-24T14:08:56.680 app[6e82e50c290e08] lhr [info] File "/usr/local/lib/python3.10/site-packages/aioapns/connection.py", line 243, in connection_lost

2024-02-24T14:08:56.680 app[6e82e50c290e08] lhr [info] self.on_connection_lost(self)

2024-02-24T14:08:56.680 app[6e82e50c290e08] lhr [info] File "/usr/local/lib/python3.10/site-packages/aioapns/connection.py", line 355, in discard_connection

2024-02-24T14:08:56.680 app[6e82e50c290e08] lhr [info] self.connections.remove(connection)

2024-02-24T14:08:56.680 app[6e82e50c290e08] lhr [info] ValueError: list.remove(x): x not in list

2024-02-24T14:08:56.684 app[6e82e50c290e08] lhr [info] ERROR:aioapns:Could not connect to server:

2024-02-24T14:08:56.687 app[6e82e50c290e08] lhr [info] WARNING:aioapns:Could not send notification c416e334-bed3-4c89-a099-0ec429d3d398: ConnectionError

Please support apns-push-type header field requirement

Many thanks for your python module, I like the compact, well-designed API. For the new watchOS 6, Apple changed the requirements to now require a new header field 'apns-push-type' in order to be delivered to watchOS. It would be nice to have support for watchOS devices in aioapns. The new requirements are described in: https://developer.apple.com/documentation/usernotifications/setting_up_a_remote_notification_server/sending_notification_requests_to_apns#2947607
Again, many thanks!

How to send to mutiple device tokens?

Add support for Python 3.12

Use PushType enum value

Many thanks for implementing push-type support. It works fine for the Apple Watch when I replace the line:

push_type=PushType.ALERT, # optional

push_type=PushType.ALERT.value, # optional

in your example. Otherwise the enum name itself and not the value it represents is used resulting in an error.

PyJWT 2.0.0 breaks the library

Using this library with the latest version of PyJWT (2.0.0) yields an error

AttributeError: 'str' object has no attribute 'decode'

The source of the error is this line: https://github.com/Fatal1ty/aioapns/blob/master/aioapns/connection.py#L65

Everything works fine with PyJWT==1.7.1 or with PyJWT==2.0.0 if you remove decoding

Can we either remove the .decode('ascii') or freeze the PyJWT version?

Endless loop when certificate expires

I am running into an endless loop when the certificate expires.

Deadlock following timeout

When attempting to send notifications with timeout, first timeout causes a deadlock to the sender making future request wait for a lock endlessly.

Example:

My code calls send_notifications with timeout:
response = await asyncio.wait_for(self.client.send_notification(request), timeout)

After multiple successful sends I got a timeout with:

Traceback (most recent call last):
  File \"/usr/local/lib/python3.10/site-packages/aioapns/client.py\", line 58, in send_notification
    response = await self.pool.send_notification(request)
  File \"/usr/local/lib/python3.10/site-packages/aioapns/connection.py\", line 387, in send_notification
    connection = await self.acquire()
  File \"/usr/local/lib/python3.10/site-packages/aioapns/connection.py\", line 358, in acquire
    connection = await self.create_connection()
  File \"/usr/local/lib/python3.10/site-packages/aioapns/connection.py\", line 501, in create_connection
    _, protocol = await self.loop.create_connection(
  File \"/usr/local/lib/python3.10/asyncio/base_events.py\", line 1089, in create_connection
    transport, protocol = await self._create_connection_transport(
  File \"/usr/local/lib/python3.10/asyncio/base_events.py\", line 1119, in _create_connection_transport
    await waiter
asyncio.exceptions.CancelledError

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File \"/usr/local/lib/python3.10/asyncio/tasks.py\", line 456, in wait_for
    return fut.result()
asyncio.exceptions.CancelledError

but since it exits without releasing the lock it acquires - all future requests gets stuck waiting for the same lock:

Traceback (most recent call last):
  File \"/usr/local/lib/python3.10/site-packages/aioapns/client.py\", line 58, in send_notification
    response = await self.pool.send_notification(request)
  File \"/usr/local/lib/python3.10/site-packages/aioapns/connection.py\", line 387, in send_notification
    connection = await self.acquire()
  File \"/usr/local/lib/python3.10/site-packages/aioapns/connection.py\", line 351, in acquire
    await self._lock.acquire()
  File \"/usr/local/lib/python3.10/asyncio/locks.py\", line 114, in acquire
    await fut
asyncio.exceptions.CancelledError

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File \"/usr/local/lib/python3.10/asyncio/tasks.py\", line 456, in wait_for
    return fut.result()
asyncio.exceptions.CancelledError

Was there a reason you chose to not use a context manager with this lock? If not is it possible to change it to use one to avoid this situation?

Add marker file for type annotations

This lib seems to have excellent type annotations. However, mypy does not seem to find the types when using aioapns in my code, as it fails with an Missing library stubs or py.typed marker error.

As I understand it, aioapns should add a py.typed marker file with its package in order to declare itself "type hint ready"? It seems like aiohttp does this for instance.

Is this library production ready?

have you used it in production environment?

Could not deserialize key data

await apns_key_client.send_notification(request) yields the following error:

...
  File ".../venv/lib/python3.9/site-packages/cryptography/hazmat/backends/openssl/backend.py", line 1248, in _handle_key_loading_error
    raise ValueError(
ValueError: ('Could not deserialize key data. The data may be in an incorrect format, it may be encrypted with an unsupported algorithm, or it may be an unsupported key type (e.g. EC curves with explicit parameters).', [_OpenSSLErrorWithText(code=503841036, lib=60, reason=524556, reason_text=b'error:1E08010C:DECODER routines::unsupported')])

I found in this library that this occurs at the following code snippet around line 74 in connection.py:

token = jwt.encode(
                payload={"iss": self.team_id, "iat": self.__issued_at},
                key=self.key,
                algorithm="ES256",
                headers={"kid": self.key_id},
            )

I'm sure this is something I'm doing wrong somewhere. Could this be an issue with my key.p8 file? Thanks in advance for any help!

It gives error when used .p8 file instead pem file. What should I have to do???

Could not send notification - ConnectionClosed

Hi,

It worked for me when I tried first, but now, after each attempt, I get this:

Could not send notification a4ae653a-827c-4a40-993e-7fe0c6a7f931: ConnectionClosed
while the client keeps trying. It actually delivers the notification each time, so I wonder why it is not releasing it.

Option to switch off logger.error for unsuccessful notifications

Each unsuccessful notification is leading to a logger.error (here https://github.com/Fatal1ty/aioapns/blame/master/aioapns/client.py#L51). This could become noisy with many notifications being sent. We'd prefer to be able to handle these errors based on the response.status, on a case-by-case basis. An example is that if the response status code is 410, we'd like to quietly deregister the token without an error notification in the system.

When adding this logging error, did you have a different token deregistering pattern in mind?
It seems like a common approach to deregistering tokens when they return a particular error code after trying to push a notification to them..

Ideally, you raise an exception here, for the user to handle.
Or maybe at least reduce the loglevel to a warning, or introduce an option to skip this logging step (so that the user can check the response status themselves)?

Disabling logging from our end would mean losing other potentially useful stuff, so we'd rather not do that.

One connection per request?

Hi,
I had a quick question for you. You have put together a useful library.
Is there one connection being made per request? And also can send_notification take a list of device tokens?
I am trying to minimize opening and closing connections with APNS2.
Thanks,
Ganesh

Support string value for APNs private key

Would be possible in future versions to allow the private key (key argument to APNs) to be a string instead of a file path, or to have a separate argument (e.g. key_string) for this purpose?

The use case for this is an application that keeps all of its private keys in an encrypted file in an external package. We don't want to keep a file containing the private key in the code base, or write temp files.

it would be nice to have outgoing proxy support

APNsKeyConnectionPool - incorrect use of key_file

APNsKeyConnectionPool` should be using key instead of key_file

#62

apps-id hader not exists in response

When I trying to send notification, lib starts spawning an error:

Traceback (most recent call last):
  File "/Users/dmitrijsenuk/.pyenv/versions/3.7.4/lib/python3.7/asyncio/sslproto.py", line 545, in data_received
    self._app_protocol.data_received(chunk)
  File "/Users/dmitrijsenuk/Projects/subscriptions_api/venv/lib/python3.7/site-packages/aioapns/connection.py", line 85, in data_received
    self.on_response_received(headers)
  File "/Users/dmitrijsenuk/Projects/subscriptions_api/venv/lib/python3.7/site-packages/aioapns/connection.py", line 229, in on_response_received
    notification_id = headers.get(b'apns-id').decode('utf8')
AttributeError: 'NoneType' object has no attribute 'decode'
Could not send notification ea9416a1-e7cb-476c-af10-cc20d5b054f0: ConnectionClosed
application protocol failed to receive SSL data
protocol: <asyncio.sslproto.SSLProtocol object at 0x11dbcad50>
transport: <_SelectorSocketTransport fd=15 read=polling write=<idle, bufsize=0>>

In the same time device continue receive same notification until I press ctrl-C.

Getting 400 (BadDeviceToken)

I'm getting a 400 (BadDeviceToken) error when running the example code using a .p8 certificate. How do I correctly get the device token?

JWT Token re-generated on every notification

I can see in the code that you re-generate a JWT token every time a notification is sent.

In the docs from Apple, it is said that :
APNs reports an error if you recreate your tokens more than once every 20 minutes
cf https://developer.apple.com/documentation/usernotifications/setting_up_a_remote_notification_server/establishing_a_token-based_connection_to_apns

Don't you have issues while using this library on production due to this constraint?

ValueError when no_cert_validation=True

aioapns/aioapns/connection.py

Lines 412 to 414 in 0d6f02c

 if no_cert_validation: 

 self.ssl_context.verify_mode = ssl.CERT_NONE 

 self.ssl_context.check_hostname = False

With CPython 3.8.5 this gives ValueError: Cannot set verify_mode to CERT_NONE when check_hostname is enabled..

If these settings are swapped, then the error doesn't occur.

Send one `find_account` notification per email address, not per organization

When using the "find my account" feature, we send one email per organization that matches the email address:
https://github.com/zulip/zulip/blob/191b1ac2be46fe4219c170ab318aa10c714cb49a/zerver/views/registration.py#L746-L759

This can lead to a deluge of emails. We should adjust the template to contain all of the organizations, listed in a single email.

No compatiblity with Python 3.10

Hi, I'm getting the following error on Python 3.10

  File "/opt/webapps/notification/tasks/push.py", line 368, in apns_push_task
    conn = apns_client.get_connection(profile_type, is_tablet)
  File "/opt/lib/apple/apns_client.py", line 31, in get_connection
    return _get_mobile_connection(app)
  File "/opt/lib/apple/apns_client.py", line 37, in _get_mobile_connection
    _CLIENTS[app] = APNs(
  File "/usr/local/lib/python3.10/site-packages/aioapns/client.py", line 26, in __init__
    self.pool = APNsCertConnectionPool(
  File "/usr/local/lib/python3.10/site-packages/aioapns/connection.py", line 402, in __init__
    super(APNsCertConnectionPool, self).__init__(
  File "/usr/local/lib/python3.10/site-packages/aioapns/connection.py", line 307, in __init__
    self._lock = asyncio.Lock(loop=self.loop)
  File "/usr/local/lib/python3.10/asyncio/locks.py", line 77, in __init__
    super().__init__(loop=loop)
  File "/usr/local/lib/python3.10/asyncio/mixins.py", line 17, in __init__
    raise TypeError(
TypeError: As of 3.10, the *loop* parameter was removed from Lock() since it is no longer necessary```

response header decoding depends on h2's version, need fix

header_encoding property of hyper-h2 changed in version 3.0.0: Changed default value from 'utf-8' to None, find in their document: https://python-hyper.org/projects/h2/en/stable/api.html.
So i think aioapns package should explicit set header_encoding property to None.

certificaton error when send push notification

I use the following codes to send push notification with certification.
These codes are from "base usage" of the readme file (removed the key part)

import asyncio
from uuid import uuid4
from aioapns import APNs, NotificationRequest, PushType

async def run():
    apns_cert_client = APNs(
        client_cert='mycert.cer',
        use_sandbox=False,
    )
    request = NotificationRequest(
        device_token='<DEVICE_TOKEN>',
        message = {
            "aps": {
                "alert": "Hello from APNs",
                "badge": "1",
            }
        },
        notification_id=str(uuid4()),  # optional
        time_to_live=3,                # optional
        push_type=PushType.ALERT,      # optional
    )
    await apns_cert_client.send_notification(request)
   
loop = asyncio.get_event_loop()
loop.run_until_complete(run())

The certification I generated and downloaded from developer.apple.com is cer format,
if I use it directly as
client_cert='mycert.cer',
Then I will get error: ssl.SSLError: [SSL] PEM lib (_ssl.c:3900)

If I convert it to pem with code:
openssl x509 -inform der -in mycert.cer -out mycert.pem
Then change code to
client_cert='mycert.pem',
Then I will get error: ssl.SSLError: [SSL] PEM lib (_ssl.c:3921)

The full traceback:

Traceback (most recent call last):
  File "/root/PythonDoc/study/testAPNs.py", line 25, in <module>
    loop.run_until_complete(run())
  File "/usr/lib/python3.10/asyncio/base_events.py", line 649, in run_until_complete
    return future.result()
  File "/root/PythonDoc/study/testAPNs.py", line 6, in run
    apns_cert_client = APNs(
  File "/usr/local/lib/python3.10/dist-packages/aioapns/client.py", line 37, in __init__
    self.pool = APNsCertConnectionPool(
  File "/usr/local/lib/python3.10/dist-packages/aioapns/connection.py", line 455, in __init__
    self.ssl_context.load_cert_chain(cert_file)
ssl.SSLError: [SSL] PEM lib (_ssl.c:3921)

What should I do to get the right certification to make it work?

Response status is 200. But device is not receiving notification

Interesting thing is that it is working in my local development environment. But it is not working in our production server.

I am using the latest version of this package in both environments

SSL handshake failed on verifying the certificate

Hello,
I'm basically running your "usage example" script (and have been doing for lots of months), but it started throwing the aforementioned error.
I'm not entirely sure, when it started doing it, might be days or weeks.

This is the message and it repeats forever:

SSL handshake failed on verifying the certificate
protocol: <asyncio.sslproto.SSLProtocol object at 0x75c68db0>
transport: <_SelectorSocketTransport fd=6 read=polling write=<idle, bufsize=0>>
Traceback (most recent call last):
  File "/usr/lib/python3.7/asyncio/sslproto.py", line 625, in _on_handshake_complete
    raise handshake_exc
  File "/usr/lib/python3.7/asyncio/sslproto.py", line 189, in feed_ssldata
    self._sslobj.do_handshake()
  File "/usr/lib/python3.7/ssl.py", line 763, in do_handshake
    self._sslobj.do_handshake()
ssl.SSLCertVerificationError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1056)
SSL error in data received

I tried running the code on my Mac, which gave 0 issues, but on the RaspberryPi it does. Maybe the Mac trusts some Apple servers that the Pi doesn't? Or some certificate on the Pi expired? I'm not sure how to update certs on the Pi, already tried system update / upgrade but without luck.

	if no_cert_validation:
	self.ssl_context.verify_mode = ssl.CERT_NONE
	self.ssl_context.check_hostname = False

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