README.md

Connect Session Firebase

connect-session-firebase is a Connect/Express compatible session store backed by the Firebase SDK.

Installation

firebase-admin must be added as a peer dependency, or you're gonna have a bad time. connect-session-firebase expects a matching major.minor version of Firebase.

$ npm install firebase-admin connect-session-firebase --save

Options

• database A pre-initialized Firebase Database app instance.
• sessions (optional) A child reference string for session storage. (defaults to "sessions")
• reapInterval (optional) How often expired sessions should be cleaned up. (defaults to 21600000, 6 hours in milliseconds)
• reapCallback (optional) A callback function to execute whenever a session clean up occurs.
• errorIfSessionNotFound (optional) Return an error object to the callback if a session doesn't exist. Only useful if you want to log when a session is no longer available. (defaults to false)

Usage

Initialize firebase-admin database and pass the instance to FirebaseStore. Connecting to the database requires a credential cert via a JSON file from the Firebase IAM & Admin Console.

• Connect

const connect = require('connect');
const FirebaseStore = require('connect-session-firebase')(connect);
const firebase = require('firebase-admin');
const ref = firebase.initializeApp({
  credential: firebase.credential.cert('path/to/serviceAccountCredentials.json'),
  databaseURL: 'https://databaseName.firebaseio.com'
});

connect()
  .use(connect.cookieParser())
  .use(connect.session({
    store: new FirebaseStore({
      database: ref.database()
    }),
    secret: 'keyboard cat'
  }));

• Express

  NOTE: In Express 4 express-session must be passed to the function connect-session-firebase exports in order to extend express-session.Store:

const express = require('express');
const session = require('express-session');
const FirebaseStore = require('connect-session-firebase')(session);
const firebase = require('firebase-admin');
const ref = firebase.initializeApp({
  credential: firebase.credential.cert('path/to/serviceAccountCredentials.json'),
  databaseURL: 'https://databaseName.firebaseio.com'
});

express()
  .use(session({
    store: new FirebaseStore({
      database: ref.database()
    }),
    secret: 'keyboard cat'
    resave: true,
    saveUninitialized: true
  }));

Security

If you use a publicly available Firebase Database, please set proper rules:

{
  "rules": {
    ".read": "false",
    ".write": "false",
    "sessions": {
      ".read": "false",
      ".write": "false"
    },
    "some_public_data": {
      ".read": "true",
      ".write": "auth !== null"
    }
  }
}

Learn more about Firebase rules: https://firebase.google.com/docs/database/security/

Tests

To run tests against connect-session-firebase you will need your own Firebase Database app available.

Checkout the repo locally and create two files in the project root:

• .env
• serviceAccountCredentials.json

With the content:

.env

FIREBASE_SERVICE_ACCOUNT=./serviceAccountCredentials.json
FIREBASE_DATABASE_URL=https://[databaseName].firebaseio.com

serviceAccountCredentials.json

{
  "type": "service_account",
  "project_id": "",
  "private_key_id": "",
  "private_key": "",
  "client_email": "",
  "client_id": "",
  "auth_uri": "https://accounts.google.com/o/oauth2/auth",
  "token_uri": "https://accounts.google.com/o/oauth2/token",
  "auth_provider_x509_cert_url": "https://www.googleapis.com/oauth2/v1/certs",
  "client_x509_cert_url": ""
}

Install the dev dependencies:

$ npm install

Run the tests:

$ npm test

License

connect-session-firebase is licensed under the MIT license.