Implement support for SOCKS5 proxies. Implement a new proxy wrapper
that handles SOCKS5 connection, authentication and requesting
connections to the actual Kafka broker endpoints.

The proxy can be configured via a new keyword argument `socks5_proxy`
to consumers, producers or admin client. The value is URL with optional
username and password. E.g.
`socks5://user:secret@proxy.example.com:10800`

The implementation is done in state machine that makes progress on
repeated calls to connect_ex. The rationale with this bit strange
design is to minimize amount of changes on the actual BrokerConnection
object.

…terations for Kafka 0.8.2 and Python 3.12 (dpkp#159)

* skip failing tests for PyPy since they work locally

* Reconfigure tests for PyPy and 3.12

* Skip partitioner tests in test_partitioner.py if 3.12 and 0.8.2

* Update test_partitioner.py

* Update test_producer.py

* Timeout tests after ten minutes

* Set 0.8.2.2 to be experimental from hereon

* Formally support PyPy 3.9

* Test Kafka 0.8.2.2 using Python 3.11 in the meantime

* Override PYTHON_LATEST conditionally in python-package.yml

* Update python-package.yml

* add python annotation to kafka version test matrix

* Update python-package.yml

* try python 3.10

* Remove support for EOL'ed versions of Python

* Update setup.py

Too many MRs to review... so little time.

After stop/start kafka service, kafka-python may use 100% CPU caused by
busy-retry while the socket was closed. This fix the issue by unregister
the socket if the fd is negative.

Co-authored-by: Orange Kao <orange@aiven.io>

Co-authored-by: Ryar Nyah <ryarnyah@gmail.com>

Co-authored-by: Denis Otkidach <denis.otkidach@gmail.com>

The former has been deprecated since setuptools 56

Co-authored-by: micwoj92 <45581170+micwoj92@users.noreply.github.com>

* docs: Update syntax in README.rst

* docs: Update code block syntax in docs/index.rst

---------

Co-authored-by: HalfSweet <60973476+HalfSweet@users.noreply.github.com>

* Fix crc32c's __main__ for Python 3

* Remove TODO from _crc32c.py

---------

Co-authored-by: Yonatan Goldschmidt <yon.goldschmidt@gmail.com>

Co-authored-by: Dave Voutila <voutilad@gmail.com>

…pkp#155)

* handling OSError

* better error output

* removed traceback logging

---------

Co-authored-by: Alexander Sibiryakov <sixty-one@yandex.ru>

…pkp#134)

wakeup

When wakeup() is called, we sometime notice that we get
an endless prints:
"Unable to send to wakeup socket!".

Those prints are spamming the logs.
This commit aims to address it by allowing restating the
application via an intentional exception raise.
This behavior is configurable and its default is backward compatible.

Signed-off-by: shimon-armis <shimon.turjeman@armis.com>
Co-authored-by: shimon-armis <shimon.turjeman@armis.com>

Co-authored-by: drewdogg <drewdogg@users.noreply.github.com>

* Support custom SASL mechanisms

There is some interest in supporting various SASL mechanisms not
currently included in the library:

* dpkp#2110 (DMS)
* dpkp#2204 (SSPI)
* dpkp#2232 (AWS_MSK_IAM)

Adding these mechanisms in the core library may be undesirable due to:

* Increased maintenance burden.
* Unavailable testing environments.
* Vendor specificity.

This commit provides a quick prototype for a pluggable SASL system.

---

**Example**

To define a custom SASL mechanism a module must implement two methods:

```py

def validate_config(conn):
    # Check configuration values, available libraries, etc.
    assert conn.config['vendor_specific_setting'] is not None, (
        'vendor_specific_setting required when sasl_mechanism=MY_SASL'
    )

def try_authenticate(conn, future):
    # Do authentication routine and return resolved Future with failed
    # or succeeded state.
```

And then the custom mechanism should be registered before initializing
a KafkaAdminClient, KafkaConsumer, or KafkaProducer:

```py

import kafka.sasl
from kafka import KafkaProducer

import my_sasl

kafka.sasl.register_mechanism('MY_SASL', my_sasl)

producer = KafkaProducer(sasl_mechanism='MY_SASL')
```

---

**Notes**

**ABCs**

This prototype does not implement an ABC for custom SASL mechanisms.
Using an ABC would reduce a few of the explicit assertions involved with
registering a mechanism and is a viable option. Due to differing feature
sets between py2/py3 this option was not explored, but shouldn't be
difficult.

**Private Methods**

This prototype relies on some methods that are currently marked as
**private** in `BrokerConnection`.

* `._can_send_recv`
* `._lock`
* `._recv_bytes_blocking`
* `._send_bytes_blocking`

A pluggable system would require stable interfaces for these actions.

**Alternative Approach**

If the module-scoped dict modification in `register_mechanism` feels too
clunky maybe the addtional mechanisms can be specified via an argument
when initializing one of the `Kafka*` classes?

* Add test_msk.py by @mattoberle

* add msk to __init__ and check for extension in conn.py

* rename try_authenticate in msk.py

* fix imports

* fix imports

* add botocore to requirements-dev.txt

* add boto3 to requirements-dev.txt

* add awscli to requirements-dev.txt

* add awscli to workflow since it takes too long to install normally

* just install botocore i guess

* just install boto3 i guess

* force reinstall awscli

* try something weird

* ok now the dang tests should work and if they don't i'll cry

* skip the msk test for now...

* Revert "skip the msk test for now..."

This reverts commit 1c29667.

* skip the msk test for now...

* nvm just needed to update tox lol

* Update kafka/sasl/gssapi.py

Co-authored-by: code-review-doctor[bot] <72320148+code-review-doctor[bot]@users.noreply.github.com>

* Update kafka/sasl/oauthbearer.py

Co-authored-by: code-review-doctor[bot] <72320148+code-review-doctor[bot]@users.noreply.github.com>

* Update kafka/sasl/plain.py

Co-authored-by: code-review-doctor[bot] <72320148+code-review-doctor[bot]@users.noreply.github.com>

* Update kafka/sasl/scram.py

Co-authored-by: code-review-doctor[bot] <72320148+code-review-doctor[bot]@users.noreply.github.com>

* Update kafka/sasl/msk.py

Co-authored-by: code-review-doctor[bot] <72320148+code-review-doctor[bot]@users.noreply.github.com>

---------

Co-authored-by: Matt Oberle <mattoberle@users.noreply.github.com>
Co-authored-by: code-review-doctor[bot] <72320148+code-review-doctor[bot]@users.noreply.github.com>

Now that the codebase has been modernised by using pyupgrade, we can
also remove all backported vendor modules, and all uses of them.

I implemented API KEY 35 from the official Apache Kafka documentation. This functionality is requested in issue # 2163 and this is an implementation proposal.

Co-authored-by: chopatate <florian.courouge@outlook.fr>

… topic naming (dpkp#172)

* Update conftest.py to use request.node.originalname instead for legal topic naming

Otherwise parametrization doesn't work.

* Update test/conftest.py

Co-authored-by: code-review-doctor[bot] <72320148+code-review-doctor[bot]@users.noreply.github.com>

---------

Co-authored-by: code-review-doctor[bot] <72320148+code-review-doctor[bot]@users.noreply.github.com>

* KIP-345 Add static consumer membership support

* KIP-345 Add examples to docs

* KIP-345 Add leave_group_on_close flag

https://issues.apache.org/jira/browse/KAFKA-6995

* KIP-345 Add tests for static membership

* KIP-345 Update docs for leave_group_on_close option

* Update changelog.rst

* remove six from base.py

* Update base.py

* Update base.py

* Update base.py

* Update changelog.rst

* Update README.rst

---------

Co-authored-by: Denis Kazakov <d.kazakov@mcplat.ru>
Co-authored-by: Denis Kazakov <denis@kazakov.ru.net>

* Add typing

* define types as Struct for simplicity's sake

…before definition (dpkp#138)

* fix if statement logic and add zstd check

* fix if statement logic and add zstd uncompress

* fix imports

* avoid variable be used before definition

* Remove unused import from legacy_records.py

---------

Co-authored-by: Alexandre Souza <alexandre.souza@axonius.com>

…not installed (dpkp#175)

Closes wbarnha#174.