I have a Flask API app that returns some JSON with http status code set to 422.

Example

def post(self, current_user, data):
  return {
    "success": False,
    "message": "blah blah"
  }, 422

When I run the app with python, I get the JSON and the 422 status code.

When I run the app with gunicorn, I get “Internal Server Error” with a 500 status code.

Is there any way to tell gunicorn to let my Flask app return the JSON with the 422 status code?

Thanks!

Environment

Debian Linux 12

docker 20.10.17

python 3.11

gunicorn 22.0.0

gunicorn_config.py

import os
workers = int(os.environ.get('GUNICORN_PROCESSES', '2'))
threads = int(os.environ.get('GUNICORN_THREADS', '4'))
bind = os.environ.get('GUNICORN_BIND', '0.0.0.0:5555')
forwarded_allow_ips = '*'
secure_scheme_headers = { 'X-Forwarded-Proto': 'https' }
certfile = os.environ.get('GUNICORN_CERTFILE', '/etc/letsencrypt/live/example.com/fullchain.pem')
keyfile = os.environ.get('GUNICORN_KEYFILE', '/etc/letsencrypt/live/example.com/privkey.pem')
ca_certs = '/etc/ssl/certs/ca-certificates.crt'

Python Start Command

pipenv run python src/run.py

Gunicorn Start Command

gunicorn --config gunicorn_config.py run:app