websocket.MQ
Copyright 2011 by Liam Breck, Menlo Park, California
License http://www.gnu.org/licenses/agpl-3.0.htmlhttps://github.com/networkimprov/websocket.MQ
A reliable message queue service for socket-connected clients.
The initial goal is to enable messaging among Node.js instances on the public net.
Clients' connections are assumed to be potentially unreliable.
As with email, each message is posted with a list of recipients.
A user may have multiple aliases; a single user may be sent a short message via an alias.
A user may have multiple client "nodes"; messages are queued for all nodes.
Distribution lists are supported.
On disk, messages are stored in separate files, within transient directories for each recipient.
Components
mqlib.js - message queue module.
mqserver.js - example app with websocket server. Creates an mqstore/ directory in the working directory.
mqclient.js - client module connecting via websocket client.
mqtest.js - test client. Creates 10 clients which connect/send/disconnect.
wsstream - websocket stream module
Dependencies
Node.js 0.2.x https://github.com/joyent/node
Usage
$ node mqserver.js & # run server in background
$ node mqtest.js # run test client; stop with ctl-C
$ node mqserver.js stop # stop server
Message format
messages are delimited with websocket-style frames
f0f {"op":"type" ...}data
1-4 hex digits, padded with 0-3 spaces, giving the size of the JSON metadata object
JSON metadata
arbitrary size 8-bit data
Message op types
To server: register, login, listEdit, post, ping, ack
To client: registered, info, quit, deliver, ack
Todo
Implement user registration with email confirmation
Redis(?) user database
Manage inactive nodes/users
SSL
Email gateway with SMTP client and LMTP server