راه‌اندازهای Remote Config

You can trigger a function in response to Firebase Remote Config events, including the publication of a new config version or the rollback to an older version. This guide describes how to create a Remote Config background function that performs a diff of two template versions.

فعال کردن یک تابع Remote Config

برای فعال کردن تابع Remote Config ، ابتدا ماژول‌های مورد نیاز را وارد کنید:

نود جی اس 

 // The Cloud Functions for Firebase SDK to set up triggers and logging.
const {onConfigUpdated} = require("firebase-functions/remoteConfig");
const logger = require("firebase-functions/logger");
// The Firebase Admin SDK to obtain access tokens.
const admin = require("firebase-admin");
const app = admin.initializeApp();
const jsonDiff = require("json-diff");
index.js

پایتون 

 # The Cloud Functions for Firebase SDK to set up triggers and logging.
from firebase_functions import remote_config_fn

# The Firebase Admin SDK to obtain access tokens.
import firebase_admin

app = firebase_admin.initialize_app()

import deepdiff
import requests
main.py

Then define a handler for the update event. The event object passed to this function contains metadata about a template update, such as the new version number and time of the update. You can also retrieve the email for the user who made the update, with name and an image if available.

Here's an example of a Remote Config function that logs a diff of each updated version and the version it replaced. The function examines the version number field of the template object and retrieves the current (newly updated) version together with the version one number lower:

نود جی اس 

 exports.showconfigdiff = onConfigUpdated(async (event) => {
  try {
    // Obtain the access token from the Admin SDK
    const accessTokenObj = await admin.credential.applicationDefault()
        .getAccessToken();
    const accessToken = accessTokenObj.access_token;

    // Get the version number from the event object
    const remoteConfigApi = "https://firebaseremoteconfig.googleapis.com/v1/" +
        `projects/${app.options.projectId}/remoteConfig`;
    const currentVersion = event.data.versionNumber;
    const prevVersion = currentVersion - 1;
    const templatePromises = [];
    templatePromises.push(fetch(
        remoteConfigApi,
        {
          method: "POST",
          body: new URLSearchParams([["versionNumber", currentVersion + ""]]),
          headers: {Authorization: "Bearer " + accessToken},
        },
    ));
    templatePromises.push(fetch(
        remoteConfigApi,
        {
          method: "POST",
          body: new URLSearchParams([["versionNumber", prevVersion + ""]]),
          headers: {Authorization: "Bearer " + accessToken},
        },
    ));

    // Get the templates
    const responses = await Promise.all(templatePromises);
    const results = responses.map((r) => r.json());
    const currentTemplate = results[0];
    const previousTemplate = results[1];
    // Figure out the differences of the templates
    const diff = jsonDiff.diffString(previousTemplate, currentTemplate);
    // Log the difference
    logger.log(diff);
  } catch (error) {
    logger.error(error);
  }
});
index.js

این نمونه از ماژول‌های json-diff و request-promise برای ایجاد diff و ساخت درخواست برای دریافت شیء الگو استفاده می‌کند.

پایتون 

 @remote_config_fn.on_config_updated()
def showconfigdiff(event: remote_config_fn.CloudEvent[remote_config_fn.ConfigUpdateData]) -> None:
    """Log the diff of the most recent Remote Config template change."""

    # Obtain an access token from the Admin SDK
    access_token = app.credential.get_access_token().access_token

    # Get the version number from the event object
    current_version = int(event.data.version_number)

    # Figure out the differences between templates
    remote_config_api = ("https://firebaseremoteconfig.googleapis.com/v1/"
                         f"projects/{app.project_id}/remoteConfig")
    current_template = requests.get(remote_config_api,
                                    params={"versionNumber": current_version},
                                    headers={"Authorization": f"Bearer {access_token}"})
    previous_template = requests.get(remote_config_api,
                                     params={"versionNumber": current_version - 1},
                                     headers={"Authorization": f"Bearer {access_token}"})
    diff = deepdiff.DeepDiff(previous_template, current_template)

    # Log the difference
    print(diff.pretty())
main.py

این نمونه از deepdiff برای ایجاد diff استفاده می‌کند و requests برای ساخت و ارسال درخواست برای دریافت شیء الگو ارائه می‌دهد.