Firebase RTDB 侦听器不适用于 FastAPI

Question

Here is my code related to Firebase RTDB Listener:

import firebase_admin
from firebase_admin import credentials
from firebase_admin import db


class FirebaseConfig:
    reference = None
    listenerRegistration = None

    def __init__(self):
        cred = credentials.Certificate("path_to_credentials.json")
        firebase_admin.initialize_app(
            cred,
            {'databaseURL': 'database_url'}
        )
        self.reference = db.reference("Users")
        self.listenerRegistration = self.reference.listen(self.userListener)

    def userListener(self, event):
        print("Listener Started.")
        try:
            print(event.data)
            updateData() # A function to update our local database
        except Exception as e:
            raise Exception("Listener Error" + str(e))

    def stopListening(self):
        print("Closing Listener")
        self.listenerRegistration.close()

The problem I am facing right now is that this listener doesn't work. The print statements don't print anything. I think this is because of FastAPI. Is there any way that I can make it work?

If they cannot work well together, do you have any alternative solutions for the same?

Answer 1

I think it might have probably been because I was using port 80 for my uvicorn server. I changed it and it worked. This is the most probable reason. Cannot say for sure.