No supported WebSocket library detected about serving HOT 6 CLOSED

So I tried to create a sample app - https://github.com/dprotaso/knative-15074

The error seems specific to the framework/build process. Even running locally with docker the sample fast_api sample websocket app I see in the logs

WARNING: Unsupported upgrade request.
WARNING: No supported WebSocket library detected. Please use "pip install 'uvicorn[standard]'", or install 'websockets' or 'wsproto' manually

Based on your pdm list you don't have those dependencies so I'd expect the same error.

Do you have an existing app container/sample app built that works on 1.12 but not 1.13? I'm wondering if something in your base image changed (was removed) and maybe you didn't notice?

I'm thinking this isn't specific to Knative.

/triage needs-user-input

from serving.

The error was with fastapi. Anyone having the same problem, just install hypercorn as described here tiangolo/fastapi#2907.

Thanks @dprotaso for the support.

from serving.

Can you link an example repository with source and how you build your container image? Otherwise it's not clear what version of python and the various dependencies you are using.

from serving.

I use pdm, here the relative dependencies:

[project]
dependencies = [
    "fastapi>=0.104.1",
    "fastapi-healthchecks>=1.1.0",
]
requires-python = ">=3.11"

from serving.

I removed too much from my initial pdm. Here the complete list of dependencies:

dependencies = [ "fastapi>=0.104.1", "fastapi-cache2[redis]>=0.2.1", "uvicorn[standard]>=0.23.2", "httpx>=0.25.1", "Jinja2>=3.1.2", "pytailwindcss>=0.2.0", "pydash>=7.0.6", "jinja2-fragments>=1.2.1", "python-multipart>=0.0.6", "ruff>=0.1.3", "pydantic-settings>=2.0.3", "requests>=2.31.0", "jsonpath-ng>=1.6.0", "psycopg2-binary>=2.9.9", "gql>=3.4.1", "requests-toolbelt>=1.0.0", "python-slugify>=8.0.1", "javascript>=1!1.1.3", "pyprojroot>=0.3.0", "python-dotenv>=1.0.0", "aiohttp>=3.8.6", "asyncpg>=0.28.0", "pytest-mock>=3.12.0", "hyx>=0.0.2", "googlemaps>=4.10.0", "pytest>=7.4.3", "pytest-asyncio>=0.21.1", "pytest-freezegun>=0.4.2", "pytest-md>=0.2.0", "pytest-emoji>=0.2.0", "natsort>=8.4.0", "pytest-playwright>=0.4.3", "pytest-xdist>=3.5.0", "playwright>=1.40.0", "pint>=0.22", "fastapi-healthchecks>=1.1.0", "selenium>=4.18.1", "selenium-wire>=5.1.0",

you can see that uvicorn is there, but the error still persist.

from serving.

Hey for us to debug this can you provide a sample repo & docker image? Or feel free to make a PR to the sample one I made.

We're not experts in python/fast_api so that will help speeding up the debugging.

from serving.