Connect Redis PubSub

connect-redis-pubsub is a Redis session store based on connect-redis backed by node_redis. Requires redis >= 2.0.0 for the SETEX command.

This module has the ability to subscribe to session changes based on the sid of a session. Anytime a session is modified, it will publish to the session's channel, and any client subscribed to that session, will receive the updated session information.

Installation

  $ npm install connect-redis-pubsub

Options

• client An existing redis client object you normally get from redis.createClient()
• subClient An existing redis client object that is going to ONLY be used for subscriptions
• host Redis server hostname
• port Redis server portno
• ttl Redis session TTL in seconds
• db Database index to use
• pass Password for Redis authentication
• prefix Key prefix defaulting to "sess:"
• ... Remaining options passed to the redis createClient() method.

Usage

var connect = require('connect'), 
  RedisStore = require('connect-redis-pubsub')(connect);

connect()
  .use(connect.session({ store: new RedisStore(options), secret: 'disco cat' }))

Subscribing:

RedisStore.subscribe(sid, callback)

Unsubscribing:

RedisStore.unsubscribe(sid, callback)

Known Issues

• The session object seems to be getting set multiple times - causing multiple publishes - looking for a way to mitigate this.

Future Plans

• Allow for one-time subscriptions (immediately unsubscribe once a the callback has been processed)
• Integrate the subscription model right on the session objects stored within request with proper EventEmitter functionality
• Write some tests for the pubsub

License

MIT