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资源说明：a framework to provide a very simple pubsub system for real time web updates
Simple PubSub ============= The aim of this framework is to provide a very simple pubsub system for real time web updates (push): - a ruby publisher sending objects to a channel - a node hub receiving updates (no storage) and dispatching data - a client receiving subscribed updates - web part update, automatically mapped from the channel and using embedded micro templates. Publisher: publisher.rb ========= The publisher is very simple, sending information with json. One publisher can publish on any channel. In the original attempt, there is only one publisher, the main app.Hub: server.js ==== This is the master piece of the mechanism. The node server is based on [socket.io](http://github.com/LearnBoost/Socket.IO-node) module. Manages websocket clients and also subscription. Listening to the publisher, it will dispatch the messages to subscribers. Also has a keepalive hack to maintain websocket. Currently uses port 8080, waiting for http proxy to fully support websocket (nginx) Subscriber engine (browser client) ================================== The client part uses [socket.io](http://github.com/LearnBoost/Socket.IO) for data transport and then send data to a small engine. A very simple engine, mapping subscribed channel with a [mustache-js](http://github.com/janl/mustache.js/) template, and providing javascript objects. Auto subscription: Each element of your webpage with _subscriber_ css class will subscribe to the channel corresponding to its _id_ (minus the integer if you need to identify this element with an integer): _main_name_1234_ will subscribe to the _/main/name_ channel. Template: For each event type (root of channel) you have to write a javascript object with the attribute template (mustache.js) and optionnally the html method and a callback. Nested channel (TODO) ============== /event/sub_event*/id TODO ==== - client keepalive / reconnect - use authentication on some channelsrequire 'lib/publisher' pub = Publisher.new('localhost') pub.publish("/path/to/channel", {:text => "hello world"})
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