How to make an HTTP request in Cloud Functions for Firebase?

Question

I am trying to make a call to apples receipt verification server using Cloud Functions for Firebase. Any idea how to make an HTTP call?

Answer 1

Keep in mind that your dependency footprint will affect deployment and cold-start times. Here's how I use https.get() and functions.config() to ping other functions-backed endpoints. You can use the same approach when calling 3rd party services as well.

const functions = require('firebase-functions'); const https = require('https'); const info = functions.config().info;  exports.cronHandler = functions.pubsub.topic('minutely-tick').onPublish((event) => {     return new Promise((resolve, reject) => {         const hostname = info.hostname;         const pathname = info.pathname;         let data = '';         const request = https.get(`https://${hostname}${pathname}`, (res) => {             res.on('data', (d) => {                 data += d;             });             res.on('end', resolve);         });         request.on('error', reject);     }); });