GCP Cloud Functions: How to handle unexpected payload structure in HTTP triggers?
I'm working with Google Cloud Functions to process incoming HTTP requests triggered by a webhook. My function is supposed to handle JSON payloads, but I'm running into an scenario where the incoming payload sometimes has a different structure than expected, and I don't know how to handle it gracefully. For example, when I receive a payload like this: ```json { "event": "user.signup", "data": { "userId": "12345", "email": "user@example.com" } } ``` I can process it just fine. However, occasionally I receive a payload like this: ```json { "event": "user.signup", "data": "unexpected string instead of object" } ``` In this case, when I try to access properties of `data`, I get an behavior. Currently, my function looks like this: ```javascript const functions = require('firebase-functions'); exports.webhookHandler = functions.https.onRequest((req, res) => { const event = req.body.event; const userData = req.body.data; // Process only if data is an object if (typeof userData === 'object' && userData !== null) { // Handle user signup logic console.log(`User ID: ${userData.userId} signed up!`); res.status(200).send('Processed successfully'); } else { console.behavior('Unexpected payload structure:', req.body); res.status(400).send('Bad Request: Invalid payload structure'); } }); ``` I am logging an behavior message and sending a 400 response when the structure is unexpected, but I want to improve the behavior handling. Should I validate the payload structure using a schema validation library like `Joi` or `ajv`? What are the best practices for ensuring that I handle these unexpected payloads without crashing or causing downtime? Any advice on how to refine my approach would be greatly appreciated!