Unable to get firebase app to deploy a simple web request using python's Flask

[mnjuhn]

I have the following main.py firebase function which I am trying to deploy using firebase deploy But when I curl the firebase endpoint I get a 404 error:

curl -v https://us-central1-<project-id>.cloudfunctions.net/test 

Here is the function I deployed:

from firebase_admin import initialize_app, db from firebase_functions import https_fn import flask initialize_app() app = flask.Flask(__name__) print("TEST APP") @app.get('/test') def hello_world(): print('Hello World') return 'Hello, Firebase Cloud Functions with Python' 

When I run the function locally by entering this command flask --app main run I am able to hit this endpoint, but not when I curl the firebase endpoint.

However, when I go to the Google Cloud Console, no functions appear. I am thinking that there must be a problem with the deployment. When I type: firebase -P staging deploy --only functions
I get the following output:

(node:25815) [DEP0040] DeprecationWarning: The `punycode` module is deprecated. Please use a userland alternative instead. (Use `node --trace-deprecation ...` to show where the warning was created) === Deploying to '<progject-id>'... i deploying functions i functions: preparing codebase cancer-hacked for deployment i functions: ensuring required API cloudfunctions.googleapis.com is enabled... i functions: ensuring required API cloudbuild.googleapis.com is enabled... i artifactregistry: ensuring required API artifactregistry.googleapis.com is enabled... ✔ functions: required API cloudfunctions.googleapis.com is enabled ✔ artifactregistry: required API artifactregistry.googleapis.com is enabled ✔ functions: required API cloudbuild.googleapis.com is enabled i functions: Loading and analyzing source code for codebase cancer-hacked to determine what to deploy * Serving Flask app 'serving' * Debug mode: off WARNING: This is a development server. Do not use it in a production deployment. Use a production WSGI server instead. * Running on http://127.0.0.1:8081 Press CTRL+C to quit 127.0.0.1 - - [15/Nov/2024 14:55:25] "GET /__/functions.yaml HTTP/1.1" 200 - 127.0.0.1 - - [15/Nov/2024 14:55:25] "GET /__/quitquitquit HTTP/1.1" 200 - /bin/sh: line 1: 25820 Terminated: 15 python3.11 "/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/firebase_functions/private/serving.py" i functions: cleaning up build files... ✔ Deploy complete! Project Console: https://console.firebase.google.com/project/<progject-id>/overview 

I have done the following commands:
pip install -r requirements.txt

firebase init functions
My requirements.txt file has the following:

Flask firebase-admin firebase-functions 

And I have the following installed libraires by running pip3 list are:

Package Version ------------------------ --------- blinker 1.9.0 CacheControl 0.14.1 cachetools 5.5.0 certifi 2024.8.30 cffi 1.17.1 charset-normalizer 3.4.0 click 8.1.7 cloudevents 1.9.0 cryptography 43.0.3 deprecation 2.1.0 firebase-admin 6.6.0 firebase-functions 0.1.2 Flask 3.1.0 Flask-Cors 5.0.0 functions-framework 3.8.2 google-api-core 2.23.0 google-api-python-client 2.153.0 google-auth 2.36.0 google-auth-httplib2 0.2.0 google-cloud-core 2.4.1 google-cloud-firestore 2.19.0 google-cloud-storage 2.18.2 google-crc32c 1.6.0 google-events 0.13.0 google-resumable-media 2.7.2 googleapis-common-protos 1.66.0 grpcio 1.67.1 grpcio-status 1.67.1 gunicorn 23.0.0 httplib2 0.22.0 idna 3.10 itsdangerous 2.2.0 Jinja2 3.1.4 MarkupSafe 3.0.2 msgpack 1.1.0 packaging 24.2 pip 24.0 proto-plus 1.25.0 protobuf 5.28.3 pyasn1 0.6.1 pyasn1_modules 0.4.1 pycparser 2.22 PyJWT 2.9.0 pyparsing 3.2.0 PyYAML 6.0.2 requests 2.32.3 rsa 4.9 setuptools 65.5.0 typing_extensions 4.12.2 uritemplate 4.1.1 urllib3 2.2.3 watchdog 6.0.0 Werkzeug 3.1.3 

I am running python version 3.11.9. Any help would be appreciated.

[mnjuhn]

I found what I was missing to get the firebase cloud function working using python's Flask library. I had to register the flask app to use https_fn wrapper. Here is the code which now works when doing a firebase deploy

import firebase_admin from firebase_admin import credentials, firestore from flask import Flask, request from firebase_functions import https_fn from cancer import get_cancer # Initialize Firebase Admin SDK cred = credentials.Certificate("serviceAccountKey.json") firebase_admin.initialize_app(cred) db = firestore.client() app = Flask(__name__) @app.route('/test', methods=['GET']) def test(): print("Hello World") return "Hello World" # Main entry point for Firebase Functions #firebase_function = functions.https.on_request(app) @https_fn.on_request() def functions(req: https_fn.Request) -> https_fn.Response: with app.request_context(req.environ): return app.full_dispatch_request() 

You can find more documentaiton in the following firebase docs:

https://firebase.google.com/docs/functions/http-events?gen=2nd

You can then access the test endpoint by going to curl -v https://us-central1-<project-id>.cloudfunctions.net/functions/test