Unable to specify HTTP proxy, aiohttp websocket does not pick up proxy from environment variables

[dtag-fma]

Describe the bug

• I am unable to specify a HTTP proxy via the Settings
• mattermostautodriver.websocket uses aiohttp, which seems to ignore a proxy set through the environment variables
• If proxy is manually passed directly to the Mattermost driver, everything is fine (but that seems to be rather a workaround!)

How To Reproduce

bot = Bot(
    settings=Settings(
        MATTERMOST_URL = "https://...",
        MATTERMOST_PORT = 443,
        BOT_TOKEN = "...",
        BOT_TEAM = "...",
        SSL_VERIFY = True,
        DEBUG=True
    ),
    plugins=[],
)

Bot initializes correctly, uses HTTP proxy set in ENV variables:

[01/10/2025 08:51:23][httpcore.connection][DEBUG] connect_tcp.started host='<REDACTED_PROXY_HOST>' port=8080 local_address=None timeout=None socket_options=None
[01/10/2025 08:51:23][httpcore.connection][DEBUG] connect_tcp.complete return_value=<httpcore._backends.sync.SyncStream object at 0x7f5eabecaff0>
[01/10/2025 08:51:23][httpcore.http11][DEBUG] send_request_headers.started request=<Request [b'CONNECT']>
[01/10/2025 08:51:23][httpcore.http11][DEBUG] send_request_headers.complete
[01/10/2025 08:51:23][httpcore.http11][DEBUG] send_request_body.started request=<Request [b'CONNECT']>
[01/10/2025 08:51:23][httpcore.http11][DEBUG] send_request_body.complete
[01/10/2025 08:51:23][httpcore.http11][DEBUG] receive_response_headers.started request=<Request [b'CONNECT']>
[01/10/2025 08:51:23][httpcore.http11][DEBUG] receive_response_headers.complete return_value=(b'HTTP/1.0', 200, b'Connection Established', [])

Then call:

bot.run()

Which causes:

[01/10/2025 08:51:23][mattermostautodriver.websocket][ERROR] Failed to establish websocket connection: <class 'aiohttp.client_exceptions.ClientConnectorDNSError'> thrown
Traceback (most recent call last):
  File "/home/fabian/.cache/pypoetry/virtualenvs/rapid-xKExur4M-py3.12/lib/python3.12/site-packages/aiohttp/connector.py", line 1351, in _create_direct_connection
    hosts = await self._resolve_host(host, port, traces=traces)
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/fabian/.cache/pypoetry/virtualenvs/rapid-xKExur4M-py3.12/lib/python3.12/site-packages/aiohttp/connector.py", line 995, in _resolve_host
    return await asyncio.shield(resolved_host_task)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/fabian/.cache/pypoetry/virtualenvs/rapid-xKExur4M-py3.12/lib/python3.12/site-packages/aiohttp/connector.py", line 1026, in _resolve_host_with_throttle
    addrs = await self._resolver.resolve(host, port, family=self._family)
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/fabian/.cache/pypoetry/virtualenvs/rapid-xKExur4M-py3.12/lib/python3.12/site-packages/aiohttp/resolver.py", line 36, in resolve
    infos = await self._loop.getaddrinfo(
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/asyncio/base_events.py", line 901, in getaddrinfo
    return await self.run_in_executor(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/concurrent/futures/thread.py", line 58, in run
    result = self.fn(*self.args, **self.kwargs)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/socket.py", line 963, in getaddrinfo
    for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
socket.gaierror: [Errno -3] Temporary failure in name resolution

If I add the following before the bot.run() call, then everything works fine:

bot.driver.options["proxy"] = "http://...."

Expected behavior

• mmpy_bot should read the proxy from the environment variables and pass it to the Mattermost driver
• Or even better: Offer to configure the proxy manually via the Settings

Operating Environment (please complete the following information):

• mmpy_bot Version: 2.2.0
• mattermostdriver/mattermostautodriver Version: 1.3.0
• Mattermost Server Version: 10.3.1
• Python Version: 3.12
• OS: Linux