CODEWITHSUNDEEP
node.jsgoogle-cloud-functions
Garuda prasad K
Garuda prasad K

Reputation: 352

Google Cloud function with Nodejs runtime not working for CORS and async

Hi I have a situation where I need to fetch the data from firestore in cloud function. But the UI is blocking because of the CORS issue hence I added the cors dependency in Nodejs. and when I need to fetch the data from the firestore I need await functionality but this is not possible inside cors. Hence need a solution here is the code piece.

const cors = require('cors')({ origin: true });
const Firestore = require('@google-cloud/firestore');
const PROJECTID = 'something';
const COLLECTION_NAME = 'ui_data';
const firestore = new Firestore({
  projectId: PROJECTID,
  timestampsInSnapshots: true,
});
exports.helloWorld = async function index(req, res) {
    cors(req, res, () => {
       const data = [];
       const querySnapshot = await firestore.collection(COLLECTION_NAME).get();
       querySnapshot.forEach(doc => {
          data.push(doc.data());
       });
     return res.status(200).send(data);
    });
}

Thanks in advance

Upvotes: 1

Views: 161

Answers (1)

Ashish
Ashish

Reputation: 6919

You can't use async to external function.

exports.helloWorld = function index(req, res) {
    cors(req, res, async () => {
       const data = [];
       const querySnapshot = await firestore.collection(COLLECTION_NAME).get();
       querySnapshot.forEach(doc => {
          data.push(doc.data());
       });
     return res.status(200).send(data);
    });
}

Upvotes: 1

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