3.10.0 and 4.0.0 incorrectly reject wss:// urls

[AraHaan]

Describe the bug

In discord.py a single wss:// type url is needed to create a websocket using aiohttp to discord's api. This both allows for new and resumed connections.

Traceback (most recent call last):
  File "client.py", line 664, in connect
  File "asyncio\tasks.py", line 507, in wait_for
  File "gateway.py", line 374, in from_client
  File "http.py", line 550, in ws_connect
  File "client.py", line 889, in _ws_connect
  File "client.py", line 477, in _request
aiohttp.client_exceptions.NonHttpUrlClientError: wss://gateway.discord.gg/?v=10&encoding=json&compress=zlib-stream

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "__init__.py", line 49, in bot_main
  File "asyncio\runners.py", line 194, in run
  File "asyncio\runners.py", line 118, in run
  File "asyncio\base_events.py", line 721, in run_until_complete
  File "__init__.py", line 38, in run_bot
  File "client.py", line 787, in start
  File "client.py", line 723, in connect
AttributeError: 'NoneType' object has no attribute 'sequence'
Task exception was never retrieved
future: <Task finished name='discord-ext-tasks: VerificationTask.expire_verifications' coro=<Loop._loop() done, defined at __init__.py:202> exception=RuntimeError('Client has not been properly initialised. Please use the login method or asynchronous context manager before calling this method')>
Traceback (most recent call last):
  File "__init__.py", line 204, in _loop
  File "__init__.py", line 188, in _call_loop_function
  File "__init__.py", line 155, in before_task
  File "client.py", line 1149, in wait_until_ready
RuntimeError: Client has not been properly initialised. Please use the login method or asynchronous context manager before calling this method
Unclosed connector
connections: ['[(<aiohttp.client_proto.ResponseHandler object at 0x00000209B9AD7AD0>, 221376.2822786)]']
connector: <aiohttp.connector.TCPConnector object at 0x00000209B9AEABA0>

To Reproduce

1. Install Discord.py & asqlite & audioop-lts
2. Install aiohttp 3.10 (branch) or 4.0.0 (default branch) from source to a manually installed cpython main build (by building installers and running them to install globally)
3. Run discord bot made in discord.py.

Expected behavior

Everything to work, this should not have broken at all. wss links in discord api is needed through aiohttp because both requests and any other methods of connecting to discord's api is not going to work inside of a running event loop (it blocks it and is really bad to do that). As such I think it needs expanded to allow wss:// links as a special case.

Logs/tracebacks

Traceback (most recent call last):
  File "client.py", line 664, in connect
  File "asyncio\tasks.py", line 507, in wait_for
  File "gateway.py", line 374, in from_client
  File "http.py", line 550, in ws_connect
  File "client.py", line 889, in _ws_connect
  File "client.py", line 477, in _request
aiohttp.client_exceptions.NonHttpUrlClientError: wss://gateway.discord.gg/?v=10&encoding=json&compress=zlib-stream

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "__init__.py", line 49, in bot_main
  File "asyncio\runners.py", line 194, in run
  File "asyncio\runners.py", line 118, in run
  File "asyncio\base_events.py", line 721, in run_until_complete
  File "__init__.py", line 38, in run_bot
  File "client.py", line 787, in start
  File "client.py", line 723, in connect
AttributeError: 'NoneType' object has no attribute 'sequence'
Task exception was never retrieved
future: <Task finished name='discord-ext-tasks: VerificationTask.expire_verifications' coro=<Loop._loop() done, defined at __init__.py:202> exception=RuntimeError('Client has not been properly initialised. Please use the login method or asynchronous context manager before calling this method')>
Traceback (most recent call last):
  File "__init__.py", line 204, in _loop
  File "__init__.py", line 188, in _call_loop_function
  File "__init__.py", line 155, in before_task
  File "client.py", line 1149, in wait_until_ready
RuntimeError: Client has not been properly initialised. Please use the login method or asynchronous context manager before calling this method
Unclosed connector
connections: ['[(<aiohttp.client_proto.ResponseHandler object at 0x00000209B9AD7AD0>, 221376.2822786)]']
connector: <aiohttp.connector.TCPConnector object at 0x00000209B9AEABA0>

Python Version

$ python --version
3.14.0a0

aiohttp Version

$ python -m pip show aiohttp
3.10.0.dev0

multidict Version

$ python -m pip show multidict
6.0.5

yarl Version

$ python -m pip show yarl
1.9.4

OS

Windows

Related component

Server, Client

Additional context

I also packed everything into a zip file and embedded python with the ability to load c extensions from zip file.

Code of Conduct

• I agree to follow the aio-libs Code of Conduct

[bdraco]

Hi @AraHaan

Thanks for reporting this issue.

Would you be able to open a PR to an xfail test to show this issue?

[AraHaan]

I already found the fix as well. Changing line 180 in client.py to add "wss" before the "" will make everything work again.

Will look into making the proper test for it though.

[AraHaan]

Opened draft pull request with the fix, test will come soon and updated docs and news entry.