Firebase Cloud Function is not accessible to the public [An application is requesting permission to access your Google Account.]

user_12968082 0
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I've just used Express with Firebase Cloud Functions and made an endpoint.

app.get('/time', (req, res) => {
    const date = new Date();
    const hours = (date.getHours() % 12) + 1;  // London is UTC + 1hr;
    res.json({bongs: 'BONG '.repeat(hours)});
});

The endpoint is accessible publicly with the path:

https://<region>-<project-name>.cloudfunctions.net/app/time

where app is from entry source index.js:

exports.app = functions.region('asia-east2').https.onRequest(app);

However, it's not accessible with the path:

https://<project-name>.web.app/app/time

It requires me to grant the permission and select my Google account by default. How come? The endpoint is for public access.

Did I miss anything to setup and how to solve this problem?

enter image description here

If I don't use Express Framework, both the above 2 paths are accessible for public. (i.e. Call functions from your app, https://firebase.google.com/docs/functions/callable)

Thank you~

google-cloud-functions firebase
1 Answers

The unaccessible path implies that you're trying to access Cloud Functions with Firebase Hosting. That error appears when there is a problem accessing your Function. Just to give you an idea, here's a thread with similar error:

firebase SSR problem, "App requesting permission to access your google account" pops up instead of website

Imporant Note: Before going to the solution, you must know that Firebase Hosting currently supports Cloud Functions that are in us-central1. You can't use any other regions for your function such as asia-east2.

Moving forward, you need to setup rewrite rules in the hosting section to serve the subpath you configured on your Express App:

firebase.json:

"hosting": {
  "public": "public",
  "ignore": [
    "firebase.json",
    "**/.*",
    "**/node_modules/**"
  ],  
  "rewrites": [ {
    "source": "/time",
    "function": "app"
  } ]
}

If you do this correctly, you should be able to access your function through this path:

https://<project-name>.web.app/time

Note that the path in Firebase Hosting is /time, not /app/time.

Reference: https://firebase.google.com/docs/hosting/functions#use_a_web_framework

user_70313080
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