[QUESTION] FastAPI on Google AppEngine

Description

Is it possible to use FastAPI on Google AppEngine?

Additional context

I have tried a minimal project, with:

• the main.py example on the repo README.md,
• requirements.txt containing just fastapi and uvicorn
• app.yaml containing just runtime: python37

When deploying, I get the following error:

Traceback (most recent call last):
  File "/env/lib/python3.7/site-packages/gunicorn/workers/gthread.py", line 279, in handle
    keepalive = self.handle_request(req, conn)
  File "/env/lib/python3.7/site-packages/gunicorn/workers/gthread.py", line 328, in handle_request
    respiter = self.wsgi(environ, resp.start_response)
TypeError: __call__() takes 2 positional arguments but 3 were given

I have tried different variations, but I always end up with this error.

[euri10]

just quoting uvicorn doc 👍

Running with Gunicorn Gunicorn is a mature, fully featured server and process manager.

Uvicorn includes a Gunicorn worker class allowing you to run ASGI applications, with all of Uvicorn’s performance benefits, while also giving you Gunicorn’s fully-featured process management.

This allows you to increase or decrease the number of worker processes on the fly, restart worker processes gracefully, or perform server upgrades without downtime.

For production deployments we recommend using gunicorn with the uvicorn worker class.

gunicorn example:app -w 4 -k uvicorn.workers.UvicornWorker For a PyPy compatible configuration use uvicorn.workers.UvicornH11Worker.

For more information, see the deployment documentation.

[hiovidiu]

Thank you @euri10 ! You are right, the entrypoint is to blame.

For future reference, the following app.yaml results in the error above:

runtime: python37
entrypoint: gunicorn main:app

while the correct version is:

runtime: python37
entrypoint: gunicorn main:app -w 4 -k uvicorn.workers.UvicornWorker