FireStore REST API call

Question

I am using postman to get data from my firestore api

https://firestore.googleapis.com/v1beta1/projects/myapp-ef511/databases/countries

but I am getting this,although my rules are public

{
    "error": {
        "code": 401,
        "message": "Request is missing required authentication credential. Expected OAuth 2 access token, login cookie or other valid authentication credential. See https://developers.google.com/identity/sign-in/web/devconsole-project.",
        "status": "UNAUTHENTICATED"
    }
}

How can I achieve this?I am planning to use retrofit in future.

Answer 1

Go to Firebase console and follow the below steps.

1. Go to Project Settings (top left corner gear icon)

2. In General tab -> Under 'Your project' section it will show Project ID & Web API Key (will use it in url)

3. Now go to your Firestore database and get the document name e-g users

Finally just hit the below url with your desired values of Project ID, Web API Key and Document

https://firestore.googleapis.com/v1/projects/[Project ID]/databases/(default)/documents/[Document]?key=[Web API Key]

Example of real url:

https://firestore.googleapis.com/v1/projects/firestore-rest-api-test/databases/(default)/documents/players?key=AIzaSyDsCtB9PiFTtkJiDRmFEakbKvoohPRAGJU

NOTE: make sure you set your project rules on test mode to make it work. Otherwise use authentication first to make it work

Answer 2

The REST API requires either a Firebase Authentication ID token or Google Identity OAuth 2.0 token. The main difference between the two is that a Firebase Auth ID applies security rules and the Google ID does not. This guide on working with the Firestore REST API should help.