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Puoi attivare una funzione in risposta agli eventi Firebase Remote Config, inclusi la pubblicazione di una nuova versione della configurazione o il rollback a una versione precedente.
Questa guida descrive come creare una funzione di Remote Config in background
che esegue un confronto tra due versioni del modello.
Attiva una funzione Remote Config
Per attivare una funzione Remote Config, importa prima i moduli richiesti:
Node.js
// The Cloud Functions for Firebase SDK to set up triggers and logging.const{onConfigUpdated}=require("firebase-functions/v2/remoteConfig");constlogger=require("firebase-functions/logger");// The Firebase Admin SDK to obtain access tokens.constadmin=require("firebase-admin");constapp=admin.initializeApp();constfetch=require("node-fetch");constjsonDiff=require("json-diff");
# The Cloud Functions for Firebase SDK to set up triggers and logging.fromfirebase_functionsimportremote_config_fn# The Firebase Admin SDK to obtain access tokens.importfirebase_adminapp=firebase_admin.initialize_app()importdeepdiffimportrequests
Poi definisci un gestore per l'evento di aggiornamento. L'oggetto evento passato a
questa funzione contiene metadati
su un aggiornamento del modello, come il nuovo numero di versione e l'ora dell'aggiornamento.
Puoi anche recuperare l'email dell'utente che ha eseguito l'aggiornamento, con il nome
e un'immagine, se disponibile.
Ecco un esempio di funzione Remote Config che
registra una differenza tra ogni versione aggiornata e la versione che ha sostituito. La funzione
esamina il campo del numero di versione dell'oggetto modello e recupera la
versione corrente (appena aggiornata) insieme al numero di versione precedente:
Node.js
exports.showconfigdiff=onConfigUpdated(async(event)=>{try{// Obtain the access token from the Admin SDKconstaccessTokenObj=awaitadmin.credential.applicationDefault().getAccessToken();constaccessToken=accessTokenObj.access_token;// Get the version number from the event objectconstremoteConfigApi="https://firebaseremoteconfig.googleapis.com/v1/"+`projects/${app.options.projectId}/remoteConfig`;constcurrentVersion=event.data.versionNumber;constprevVersion=currentVersion-1;consttemplatePromises=[];templatePromises.push(fetch(remoteConfigApi,{method:"POST",body:newURLSearchParams([["versionNumber",currentVersion+""]]),headers:{Authorization:"Bearer "+accessToken},},));templatePromises.push(fetch(remoteConfigApi,{method:"POST",body:newURLSearchParams([["versionNumber",prevVersion+""]]),headers:{Authorization:"Bearer "+accessToken},},));// Get the templatesconstresponses=awaitPromise.all(templatePromises);constresults=responses.map((r)=>r.json());constcurrentTemplate=results[0];constpreviousTemplate=results[1];// Figure out the differences of the templatesconstdiff=jsonDiff.diffString(previousTemplate,currentTemplate);// Log the differencelogger.log(diff);}catch(error){logger.error(error);}});
Questo esempio utilizza i moduli json-diff e
request-promise per
creare la differenza e creare la richiesta per ottenere l'oggetto modello.
Python
@remote_config_fn.on_config_updated()defshowconfigdiff(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 SDKaccess_token=app.credential.get_access_token().access_token# Get the version number from the event objectcurrent_version=int(event.data.version_number)# Figure out the differences between templatesremote_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 differenceprint(diff.pretty())
[[["Facile da capire","easyToUnderstand","thumb-up"],["Il problema è stato risolto","solvedMyProblem","thumb-up"],["Altra","otherUp","thumb-up"]],[["Mancano le informazioni di cui ho bisogno","missingTheInformationINeed","thumb-down"],["Troppo complicato/troppi passaggi","tooComplicatedTooManySteps","thumb-down"],["Obsoleti","outOfDate","thumb-down"],["Problema di traduzione","translationIssue","thumb-down"],["Problema relativo a esempi/codice","samplesCodeIssue","thumb-down"],["Altra","otherDown","thumb-down"]],["Ultimo aggiornamento 2025-09-06 UTC."],[],[],null,["\u003cbr /\u003e\n\nYou can trigger a function in response to\n[Firebase Remote Config](/docs/remote-config) events, including\nthe publication of a new config version or the rollback to an older version.\nThis guide describes how to create a Remote Config background function\nthat performs a diff of two template versions.\n\nTrigger a Remote Config function\n\nTo trigger a Remote Config function, first import the\nrequired modules: \n\nNode.js \n\n // The Cloud Functions for Firebase SDK to set up triggers and logging.\n const {onConfigUpdated} = require(\"firebase-functions/v2/remoteConfig\");\n const logger = require(\"firebase-functions/logger\");\n // The Firebase Admin SDK to obtain access tokens.\n const admin = require(\"firebase-admin\");\n const app = admin.initializeApp();\n const fetch = require(\"node-fetch\");\n const jsonDiff = require(\"json-diff\"); \n https://github.com/firebase/functions-samples/blob/c4fde45b65fab584715e786ce3264a6932d996ec/Node/remote-config-diff/functions/index.js#L20-L27\n\nPython \n\n # The Cloud Functions for Firebase SDK to set up triggers and logging.\n from firebase_functions import remote_config_fn\n\n # The Firebase Admin SDK to obtain access tokens.\n import firebase_admin\n\n app = firebase_admin.initialize_app()\n\n import deepdiff\n import requests \n https://github.com/firebase/functions-samples/blob/c4fde45b65fab584715e786ce3264a6932d996ec/Python/remote-config-diff/functions/main.py#L17-L26\n\nThen define a handler for the update event. The event object passed to\nthis function contains metadata\nabout a template update, such as the new version number and time of the update.\nYou can also retrieve the email for the user who made the update, with name\nand an image if available.\n\nHere's an example of a Remote Config function that\nlogs a diff of each updated version and the version it replaced. The function\nexamines the version number field of the template object and retrieves the\ncurrent (newly updated) version together with the version one number lower: \n\nNode.js \n\n exports.showconfigdiff = onConfigUpdated(async (event) =\u003e {\n try {\n // Obtain the access token from the Admin SDK\n const accessTokenObj = await admin.credential.applicationDefault()\n .getAccessToken();\n const accessToken = accessTokenObj.access_token;\n\n // Get the version number from the event object\n const remoteConfigApi = \"https://firebaseremoteconfig.googleapis.com/v1/\" +\n `projects/${app.options.projectId}/remoteConfig`;\n const currentVersion = event.data.versionNumber;\n const prevVersion = currentVersion - 1;\n const templatePromises = [];\n templatePromises.push(fetch(\n remoteConfigApi,\n {\n method: \"POST\",\n body: new URLSearchParams([[\"versionNumber\", currentVersion + \"\"]]),\n headers: {Authorization: \"Bearer \" + accessToken},\n },\n ));\n templatePromises.push(fetch(\n remoteConfigApi,\n {\n method: \"POST\",\n body: new URLSearchParams([[\"versionNumber\", prevVersion + \"\"]]),\n headers: {Authorization: \"Bearer \" + accessToken},\n },\n ));\n\n // Get the templates\n const responses = await Promise.all(templatePromises);\n const results = responses.map((r) =\u003e r.json());\n const currentTemplate = results[0];\n const previousTemplate = results[1];\n // Figure out the differences of the templates\n const diff = jsonDiff.diffString(previousTemplate, currentTemplate);\n // Log the difference\n logger.log(diff);\n } catch (error) {\n logger.error(error);\n }\n }); \n https://github.com/firebase/functions-samples/blob/c4fde45b65fab584715e786ce3264a6932d996ec/Node/remote-config-diff/functions/index.js#L31-L73\n\nThis sample uses the [`json-diff`](https://www.npmjs.com/package/json-diff) and\n[`request-promise`](https://www.npmjs.com/package/request-promise) modules to\ncreate the diff and build the request to get the template object.\n\nPython \n\n @remote_config_fn.on_config_updated()\n def showconfigdiff(event: remote_config_fn.CloudEvent[remote_config_fn.ConfigUpdateData]) -\u003e None:\n \"\"\"Log the diff of the most recent Remote Config template change.\"\"\"\n\n # Obtain an access token from the Admin SDK\n access_token = app.credential.get_access_token().access_token\n\n # Get the version number from the event object\n current_version = int(event.data.version_number)\n\n # Figure out the differences between templates\n remote_config_api = (\"https://firebaseremoteconfig.googleapis.com/v1/\"\n f\"projects/{app.project_id}/remoteConfig\")\n current_template = requests.get(remote_config_api,\n params={\"versionNumber\": current_version},\n headers={\"Authorization\": f\"Bearer {access_token}\"})\n previous_template = requests.get(remote_config_api,\n params={\"versionNumber\": current_version - 1},\n headers={\"Authorization\": f\"Bearer {access_token}\"})\n diff = deepdiff.DeepDiff(previous_template, current_template)\n\n # Log the difference\n print(diff.pretty()) \n https://github.com/firebase/functions-samples/blob/c4fde45b65fab584715e786ce3264a6932d996ec/Python/remote-config-diff/functions/main.py#L31-L53\n\nThis sample uses [`deepdiff`](https://pypi.org/project/deepdiff/) to\ncreate the diff, and `requests` to build and send the request to get\nthe template object."]]