firebase / firebase/firebase-admin-python

Realtime Database Listener Crashes on Internet Disconnection

Đang mở
#791 2 bình luận 0 reaction 0 người được giao Xem trên GitHub
api: database
Ngôn ngữ chính
Python
Star
1.2k
Fork
359
Merge trung bình
5 ngày 6 phút
Pull request đã merge (30 ngày)
2

Mô tả

Description
When the internet disconnects, the Firebase Realtime Database listener crashes, even with try and except statements. The application fails to recover and reconnect the listeners, resulting in the following error:

javascript
Code kopieren
google.api_core.exceptions.RetryError: Deadline of 120.0s exceeded while calling target function, last exception: HTTPSConnectionPool(host='storage.googleapis.com', port=443): Max retries exceeded with url: /storage/v1/b/villaduniatest.appspot.com/o?projection=noAcl&prefix=pdfstable%2F&prettyPrint=false (Caused by NewConnectionError(': Failed to establish a new connection: [Errno 11001] getaddrinfo failed'))
Reconnecting...
Steps to Reproduce
Start a Firebase Realtime Database listener in a Python application.
Disconnect the internet.
Observe the application crash with the above error.
Expected Behavior
The application should handle the disconnection gracefully, retrying the connection until the internet is restored, without crashing.

Actual Behavior
The application crashes immediately upon internet disconnection, and does not recover.

Environment
Firebase Admin SDK: Python
Python Version: (your Python version)
Operating System: (your OS version)
Additional Context
Here is the relevant portion of the code:

python
Code kopieren
import firebase_admin
from firebase_admin import credentials, initialize_app, db
from requests.exceptions import ConnectionError, Timeout
import time

class DatabaseListener:
def __init__(self, app_instance):
self.app_instance = app_instance
self.listeners = {}

def start_listener(self, path, callback):
ref = db.reference(path, app=self.app_instance)
while True:
try:
listener = ref.listen(callback)
self.listeners[path] = listener
print(f"Listener started for path: {path}")
break
except (ConnectionError, Timeout) as e:
print(f"Connection error starting listener for {path}: {e}")
time.sleep(5) # Retry after a delay

def stop_listener(self, path):
if path in self.listeners:
listener = self.listeners[path]
listener.close()
del self.listeners[path]
print(f"Listener stopped for path: {path}")

def stop_all_listeners(self):
for path in list(self.listeners.keys()):
self.stop_listener(path)
print("All listeners stopped.")
Any guidance or solutions to ensure the listener can recover from network disconnections would be greatly appreciated

Hướng dẫn đóng góp

Mở hướng dẫn đóng góp

Đánh giá

Issue này chưa được đánh giá.

Nhận issue mới trong hộp thư của bạn

Bản tóm tắt ngắn những issue GitHub phù hợp với người mới.