DynamoDB Session Store for Express

This project provides a DynamoDB-based session store for Express applications. It allows you to store your Express session data in a DynamoDB table, providing a scalable and reliable storage solution. It is based on the implementation described in this blog post.

Features

• Store Express session data in DynamoDB
• Support for Time to Live (TTL) to automatically expire sessions
• Simple setup and easy-to-use API
• Utilizes AWS SDK for JavaScript V3 for improved performance and modularity

Requirements

• Node.js v12.x or later
• An AWS account with DynamoDB access

Installation

npm install --save serverless-dynamodb-session-store

Usage

const express = require('express');
const session = require('express-session');
const { DynamoDBSessionStore } = require('serverless-dynamodb-session-store');

const app = express();

app.use(session({
  store: new DynamoDBSessionStore({
    table: 'YourDynamoDBTableName', // Optional, default is "sessions"
  }),
  secret: 'your-session-secret',
  resave: false,
  saveUninitialized: true,
  cookie: { secure: true }
}));

app.get('/', (req, res) => {
  res.send('Hello World!');
});

Configuration

const store = new DynamoDBSessionStore({
  table: 'YourDynamoDBTableName', // Optional, default is "sessions"
  client: yourDynamoDBClient, // Optional, a custom DynamoDB client instance
});

API

The DynamoDBSessionStore class extends the express-session.Store class and implements the following methods:

• get(sessionId: string, callback: (err: any, session: SessionData | null) => void): Promise
• set(sessionId: string, session: SessionData, callback?: (err?: any) => void): Promise
• destroy(sessionId: string, callback?: (err?: any) => void): Promise
• length(callback: (err: any, length?: number) => void): Promise
• touch(sessionId: string, session: SessionData, callback?: (err?: any) => void): Promise
• reap(callback?: (err?: any) => void): Promise
• all(callback: (err: any, sessions?: { [sid: string]: SessionData } | null) => void): Promise