WebSockets to Socket.io

Update July 16, 2012 There have been several updates to gevent-socketio and socket.io itself. For an updated intro to these libraries, please see m y new post on Realtime Web Chat with Socket.io and Gevent

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In a previous blog post, I showed how you can use Gevent, ZeroMQ, WebSockets, and Flot to create a nice asynchronous server that graphs events in real time to multiple web consumers. Unfortunately, Chrome is just about the only browser that my demo worked in due to some issues with the WebSockets standard. So I've updated the example to use Socket.io, a WebSockets-like Javascript library that will work across multiple browsers.

Zarkov is a Web Service

Over the past few weeks I've been working on a service in Python that I'm calling, in the tradition of naming projects after characters in Flash Gordon, Zarkov. So what exactly is Zarkov? Well, Zarkov is many things (and may grow to more):

• Zarkov is an event logger
• Zarkov is a lightweight map-reduce framework
• Zarkov is an aggregation service
• Zarkov is a webservice

In my first post, I discussed Zarkov as an event logger. Next, I explored Zarkov as a map-reduce framework. After that, I talked about using Zarkov's aggregation definitions. Today, I'll focus on how you can get those aggregates out of Zarkov using Zarkov's built-in JSON web service.

Gevent, ZeroMQ, WebSockets, and Flot FTW!

As part of the work I've been doing on Zarkov I've had the opportunity to play around with a lot of cool technologies, among which are gevent, ZeroMQ, WebSockets, and Flot. It took a while to get to the point where I could actually get things done, but once I was there, things were incredibly simple. In this post I'll show you how to use these three techologies together to build a simple web app with realtime server push data.