How to read a JSON file data and use it in firebase cloud function

Question

I have a firebase cloud function which will be invoked on HTTP request which is working fine.

Now, I want to read data from a JSON file for some business logic. Below are the 2 ways I was trying to read the JSON file:

Option #1) Saved the JSON file inside 'public' directory in my nodejs project and deployed. Got a Hosting URL which I am using like below. But its throwing an error saying 'Error: getaddrinfo ENOTFOUND...'

Option #2) Uploaded the JSON file to firebase cloud storage. Didnt find any example to try this out. Ended up with the below code:

const functions = require('firebase-functions');
const admin = require('firebase-admin');
const Firestore = require('@google-cloud/firestore');
const firestore = new Firestore();
const http = require('http');
const url = require('url');

// Option #2 required variables
var storage = require('@google-cloud/storage');
const gcs = storage({projectId: "<Project ID>"});
const bucket = gcs.bucket("<bucket-name>");
const file = bucket.file("<filename.json>")

// HTTP Trigger
exports.functionName = functions.https.onRequest((req, res) => {
 var request = require('request'); 
 var paramValue = req.body.queryParam;
 console.log(paramValue);

// Option #1 - Using hosted URL
var hostingURL = "https://xxxxxxxx.firebaseapp.com/filename.json";
 console.log(hostingURL);
 request({
        url:hostingURL,
        method: 'POST', 
        json:{ key: 'value' } },function(error, response, data) {
 });
  
// Option #2 - Ended up here. Want to read from cloud storage bucket.
console.log(file);

});

Can some one help me?

Answer 1

You can place the .json file in the same folder, where your index.js is. Then you can do the following:

const config = require('./config.json');
console.log(config.foo);

Given following config.json file:

{
    "foo" : "bar"
}

Answer 2

If your file is in Firebase Could Storage you can use this approach:

const admin = require('firebase-admin');
admin.storage().bucket().file("yourDirForFile/yourFile.json")
    .download(function (err, contents) {
        if (!err) {
            var jsObject = JSON.parse(contents.toString('utf8'))
        }
});

variable jsObject you can use as you wish. It is in memory for now.