A simple bridge between EventSource and an AMQP fanout exchange.
EventSource is a new browser standard released as part of the HTML5 spec.
It lets the browser send a never-ending HTTP request to a server and provides a javascript API for binding to events pushed from the server.
EventSource is very handy when you don't need the full bidirectional communication that Websockets offers. it plays well with load-balancers, intermediary proxies and HTTPS termination.
This library sets up an EventSource that clients can connect to specifying a channel to listen to in the query string. The server connects to a fanout AMQP exchange and routes AMQP messages as events to the javascript clients.
MongoDB is used to store user and connection information.
The server expects the AMQP messages to be JSON following the format:
{
"channel": "some-channel", // Required
"data": "{/"msg/": /"data/"}", // Required
"id": "event-id", // optional
"name": "event-name" // optional
}
To open connections to a channel a user with an key and a secret is expected to exist in the database. Before opening a connection a socket id must be aquired from by calling POST /socket
A simple example of how to interact with this API can be found in the [https://github.com/eshq/eshq-gem](eshq ruby gem).
Clone the repository, cd to the root of it and execute
cabal install
Eventsource Broker depends on MongoDB and RabbitMQ. Make sure everything is configured right in config/app.cfg and then run with:
eventsource-broker -p <port>
Copyright (c)2011, Mathias Biilmann info@mathias-biilmann.net
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