Handling HTTP requests forwarded from Firebase Hosting to Cloud Functions

Question

I'm currently trying to patch data to my Firestore database using http. I'm trying to do this without using a external server, so by using Firebase Hosting and Functions.

First I initialized my Firebase project and I imported express, body-parser and firebase-functions-helper into the functions.

Then I added this to my firebase.json, so the source is linked to the exact function

 "rewrites": [
      {
        "source": "/api/v1/**",
        "function": "webApi"
      }
    ]

Second, I wrote this typescript that should upload the data from the HTTP patch to the Firestore database. This is stored in functions/src/index.ts

import * as functions from 'firebase-functions';
import * as admin from 'firebase-admin';
import * as firebaseHelper from 'firebase-functions-helper/dist';
import * as express from 'express';
import * as bodyParser from 'body-parser';

admin.initializeApp(functions.config().firebase);
const db = admin.firestore();

const app = express();
const main = express();

main.use(bodyParser.json());
main.use(bodyParser.urlencoded({extended: false}));
main.use('/api/v1/', app);

const sensorsCollection = 'sensors';
export const webApi = functions.https.onRequest(main);

app.patch('/sensor/:sensorId', async(req, res) => {
    try{
        await firebaseHelper.firestore.updateDocument(db, sensorsCollection, req.params.sensorId, req.body);
        res.status(200).send('Update Success');
    }catch(error){
        res.status(204).send('Patch Error');
    }
})

But when I use postman to patch data to https://my-project.com/api/v1/document-id it gives a 404-error containing: "Cannot PATCH /api/v1/XXX"

I double checked I have the exact document Id and I check if I have proper JSON data. Does somebody know the awnser and please help me?

Please edit the question to show exactly how you are invoking this function. — Doug Stevenson
– Doug Stevenson, Commented Mar 24, 2020 at 17:48
I still don't see how you are invoking this function. What are you doing that should make this function run? — Doug Stevenson
– Doug Stevenson, Commented Mar 24, 2020 at 17:57
Sorry for the inconvenience I hope it is better know. I haven't used stackoverflow in a long time. — Branco
– Branco, Commented Mar 24, 2020 at 18:58
Your question should explain how exactly how you are using postman to make the request. What is the URL you're using? What would we do if we wanted to duplicate this issue on our own? — Doug Stevenson
– Doug Stevenson, Commented Mar 24, 2020 at 19:28

Doug Stevenson · Accepted Answer · 2020-03-24 21:03:32Z

2

Your URL just does not match your route. Your route is set to trigger on paths that match /sensor/*:

app.patch('/sensor/:sensorId', async(req, res) => {

But your URL doesn't even have "sensor" anywhere in its path:

/api/v1/OaSmA27EGQV3urL6fO9g

You should adjust your path to match what's handled by your route. Perhaps you meant something more like this:

/api/v1/sensor/OaSmA27EGQV3urL6fO9g

answered Mar 24, 2020 at 21:03

Doug Stevenson

321k37 gold badges458 silver badges474 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Branco Over a year ago

It works thanks! do you maybe know how I can put data into an array structured like this? prnt.sc/rm605r

Doug Stevenson Over a year ago

If you have another question, post it separately.

Collectives™ on Stack Overflow

Handling HTTP requests forwarded from Firebase Hosting to Cloud Functions

1 Answer 1

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related