Express Session

Express session manager.

Install

npm install @universal-packages/express-session

npm install express

Middleware

session([options])

Initialize a Session object

import { session } from '@universal-packages/express-session'
import { RedisEngine } from '@universal-packages/universal-token-registry-redis'
import express from 'express'

const engine = new RedisEngine({ host: 'localhost' })
await engine.connect()

const app = express()

app.use(session({ engine }))

Options

Session takes the same options as Token Registry

Additionally:

• cookieName String default: "session" Name of the cookie to fetch for the session token.

• registryId String String to use to add randomness to the token generation.

• trackSessionAccess Boolean Update registry every time a request is made to track ip and last access changes.

authenticateRequest

Use this for a simple request rejection if the session was not authenticated.If not authenticated the middleware ends the response with unauthorized status.

import { authenticateRequest } from '@universal-packages/express-session'

app.get('/private', authenticateRequest, async (request, response) => {
  response.end()
})

Create your own

Authenticating request is very simple you can even add your own logic like setting a current user to use later.

export async function authenticateRequest(request, response, next) {
  if (request.session.authenticated) {
    request.currentUser = await User.find(request.session.authenticatableID)

    next()
  } else {
    response.status(401).end()
  }
}

Request authentication

You can either set the header Authorization in the format bearer <token> or configure express to parse cookies and set a session cookie with the token value, more about how to get a token below.

Session

When the middleware is in use a Session object will be available in the request object.

app.get('/', async (request, response) => {
  const currentUser = await User.find(request.session.authenticatableID)

  response.end()
})

Properties

authenticated Boolean

True whe a request was authenticated with a token.

id String

A unique id for the session aside from the token.

authenticatableId String

The same id used to create the session at log in.

token String

The token that came with the request.

firstAccessed Date

Date in which the session was created at log in.

lastAccessed Date

Date of the current moment using the session token.

firstIp String

Request ip when the session was created at log in.

lastIp String

Request ip of the current moment using the session token.

userAgent String

User agent in which the session was created at log in.

Instance methods

logIn(authenticatableID: String) Async

Creates a new session using the authenticatable id and sets the cookie session as well as the Authorization response header to return to the user when ending the response.

logOut(token? string) Async

Disposes the current session from the registry so the token is no longer valid, or if a token is provided it will dispose that session instead.

activeSessions() Async

Returns all the active sessions for the current session authenticatable.

Static methods

activeSessions(authenticatableId: String, [options: Object]) Async

Returns all the active sessions for the authenticatable id.

• authenticatableId String The id of the authenticatable to get the active sessions from.
• options Object Same options as Token Registry

Global methods

injectSession(request: Request, response: Response, options?: ExpressSessionOptions)

To only inject the session object into the request and don't behave as middle ware use this method. In case you are doing some custom middleware.

import { injectSession } from '@universal-packages/express-session'
import express from 'express'

const app = express()

app.use(async (request, response, next) => {
  await injectSession(request, response, options)

  next()
})

Typescript

In order for typescript to see the global types you need to reference the types somewhere in your project, normally ./src/globals.d.ts.

/// <reference types="@universal-packages/express-session" />

This library is developed in TypeScript and shipped fully typed.

Contributing

The development of this library happens in the open on GitHub, and we are grateful to the community for contributing bugfixes and improvements. Read below to learn how you can take part in improving this library.

• Code of Conduct
• Contributing Guide

License

MIT licensed.