Extend Remote Config with Cloud Functions

You can trigger a function in response to 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.

Trigger a Remote Config function

To trigger a Remote Config function, first import the required modules:

Node.js

   
 // 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

Python

  # 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

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

@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

Extend Remote Config with Cloud Functions Stay organized with collections Save and categorize content based on your preferences.

Trigger a Remote Config function

Node.js

Python

Node.js

Python

Extend Remote Config with Cloud Functions