Python和firebase实时监控

Question

请使用python监视您的防火墙数据库，以便在添加新元素时执行特定任务。喜欢经常检查数据库中是否有新的或传入的元素；检查是否向数据库中添加了一个新元素。

Answer 1

您可以使用listen的firebase-admin方法来侦听对火基实时数据库的特定字段所做的更改。

以下是完整的示例：

# Importing required packages
import firebase_admin
from firebase_admin import credentials, db

# Initializing the database with URL
cred = credentials.Certificate('path/to/your/service.json')
firebase_admin.initialize_app(cred,{
    'databaseURL': 'https://YOUR-DATABASE-URL-NAME-HERE.firebaseio.com/'
}) 


def listener(event):
    print(event.event_type)  # Indicates the type of the event done
    print(event.path)  # References the path of the event
    print(event.data)  # Gives the UPDATED DATA, None if deleted

    # Now, executing specific functions based on the new data(UPDATED DATA)

    if str(event.data) == 'hello':
        # /// Execute your code here ///
        print('Data updated as ', str(event.data))

    elif str(event.data) == None:
        # /// Execute your code here ///
        print('Your data has been deleted!')

    # Follow these steps

db.reference('path/to/monitor').listen(listener) # It calls the above listener method(It continuosly listens for the data changes in your database)
# Everytime the data changes, listener function will be called