How to run an Express API via Firebase Cloud Functions locally?

Question

I have a standard REST API using Express, exposed via a Firebase Cloud Function.

const api = express() api.get('/test', (req, res) => res.status(403).json({ "REASON": "UNAUTHORIZED" })) exports.api = functions.https.onRequest(api)

Remote

When I deploy it and send GET https://<remote>/api/test via Postman I get 403 { "REASON": "UNAUTHORIZED" } as expected.

Local

When I run firebase emulators:start --only functions to serve these functions locally and test them, I do see functions: HTTP trigger initialized at http://localhost:5001/.../api in my terminal, but when I send GET http://localhost:5001/.../api/test via Postman I get 200 Not Found.

Am I missing something?

If you have reproduction steps for something with the Firebase emulator suite that isn't working the way you expect, I suggest filing an issue on the Firebase CLI GitHub. github.com/firebase/firebase-tools — Doug Stevenson
– Doug Stevenson, Commented Feb 22, 2020 at 22:11
It was indeed a defect in the Firebase CLI, it seems to be fixed in the latest version (7.13.1) — vbuzze
– vbuzze, Commented Feb 23, 2020 at 20:37

vbuzze · Accepted Answer · 2020-02-23 20:38:04Z

It was indeed a defect in the Firebase CLI, it seems to be fixed in the latest version (7.13.1)

Installed the latest version using: npm install -g firebase-tools@latest

Note: it did require me to update to compatible version of firebase-functions and firebase-admin as well.

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