TypeError [ERR_HTTP_INVALID_HEADER_VALUE] for Algolia with Firebase

Question

I am following the Firebase tutorial on how to implement Algolia with Firebase: https://firebase.google.com/docs/firestore/solutions/search

I am currently stuck on the indexing part of the tutorial as I have errors coming from the firebase cloud-functions logs.

The error is: TypeError [ERR_HTTP_INVALID_HEADER_VALUE]: Invalid value "undefined" for header "x-algolia-api-key"

How can I fix this error?

Here is my code

const functions = require('firebase-functions');

const algoliasearch = require("algoliasearch");

const ALGOLIA_ID = functions.config().algolia.app_id;
const ALGOLIA_ADMIN_KEY = functions.config().algolia.api_key;
const ALGOLIA_SEARCH_KEY = functions.config().algolia.search_key;

const ALGOLIA_INDEX_NAME = 'users';
const client = algoliasearch(ALGOLIA_ID, ALGOLIA_ADMIN_KEY);

// Update the search index every time a blog post is written.
exports.onUserCreated = functions.firestore.document('path').onCreate((snap, context) => {
    // Get the note document
    const user = snap.data();
  
    // Add an 'objectID' field which Algolia requires
    user.objectID = snap.id;
    console.log(user.objectID)
  
    // Write to the algolia index
    const index = client.initIndex(ALGOLIA_INDEX_NAME);
    return index.saveObject(user);
  });

Answer 1

Obviously your ALGOLIA_ID or ALGOLIA_ADMIN_KEY value is undefined. You try to use values from functions environment configuration but it does not seem to be there.

In terminal go to your firebase project folder and type

firebase functions:config:get

You should see the output that should look like JSON object. If you don't see algolia settings, set it like this:

firebase functions:config:set algolia.app_id="YOUR APP ID" algolia.api_key="YOUR API KEY" algolia.search_key="YOUR SEARCH KEY"

More info here: https://firebase.google.com/docs/functions/config-env