winston-firestore

A Winston transport to allow sending logs into Firebase Firestore

Usage

Set up a new Web App in Firebase (Optional)

It's a good practice to set up a new Web app in Firebase to produce logs. You can also use your existing app instead.

You'll need the following configurations later:

var firebaseConfig = {
  apiKey: "AIzaSyAThisIsASampleAPIkeyELHHZNZu8",
  authDomain: "someapp.firebaseapp.com",
  projectId: "someapp",
  storageBucket: "someapp.appspot.com",
  messagingSenderId: "508123456421",
  appId: "1:508123456421:web:42141234c987abcdefgfcc",
  measurementId: "G-WB0ABCD1B8"
};

Install winston-firestore

Install the package by

npm install winston-firestore

or

yarn add winston-firestore

Add FirestoreTransport transport into winston:

import { FirestoreTransport } from 'winston-firestore';

  winston.createLogger({
    ...
    transports: [
      ...,
      new FirestoreTransport({
        firebaseConfig: {
          apiKey: "AIzaSyAThisIsASampleAPIkeyELHHZNZu8",
          authDomain: "someapp.firebaseapp.com",
          projectId: "someapp",
          storageBucket: "someapp.appspot.com",
          messagingSenderId: "508123456421",
          appId: "1:508123456421:web:42141234c987abcdefgfcc",
          measurementId: "G-WB0ABCD1B8"
        },
        parentCollectionName: '<collection>',
        parentDocumentId: '<doucment>',
        collectionName: '<name of the logs collection>',
        ...other transport options...
      }),
      ...,
    ],
    ...
  })

Use firebaseConfig from the previous step.

Looks like Firebase only requires projectId, so if you don't want to configure so many values, you can try just passing projectId in, or at most with storageBucket.

Now we need to configure three necessary variables to make it work.

Our transport will push any log into a sub collection of a specified firestore document.

For example, if you want to save all logs into logs sub collection of /Computers/mycomputer document, you will need to configure like this:

parentCollectionName: 'Computers',
parentDocumentId: 'mycomputer',
collectionName: 'logs',

and all logs will be pushed into /Computers/mycomputer/logs sub collection with auto generated ids.

Setup proper rules for Firestore

You'll need to setup proper rules for Firestore to receive those logs. An easy but dangerous way could be:

match /Computers/{computer} {
  match /logs/{log} {
    allow write: if true;
  }
  allow read, write: if false;
}

Please consider security risks thoughtfully.