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WebSockets - An Introduction

WebSockets is a modern HTML5 standard which makes communication between client and server a lot more simpler than ever. We are all familiar with the technology of sockets. Sockets have been fundamental to network communication for a long time but usually the communication over the browser has been restricted. The general restrictions

The server used to have a permanent listener while the client (aka browser) was not designated any fixed listener for a more long term connection. Hence, every communication was restricted to the client demanding and the server responding.
This meant that unless the client requested for a particular resource, the server was unable to push such a resource to the client.
This was detrimental since the client is then forced to check with the server at regular intervals. This meant a lot of libraries focused on optimizing asynchronous calls and identifying the response of asynchronous calls. Notably t

	/** @jsx React.DOM */
	function makeStubbedDescriptor(component, props, contextStubs) {
	var TestWrapper = React.createClass({
	childContextTypes: {
	currentPath: React.PropTypes.string,
	makePath: React.PropTypes.func.isRequired,
	makeHref: React.PropTypes.func.isRequired,
	transitionTo: React.PropTypes.func.isRequired,
	replaceWith: React.PropTypes.func.isRequired,
	goBack: React.PropTypes.func.isRequired,

	http {
	log_format bodylog '$remote_addr - $remote_user [$time_local] '
	'"$request" $status $body_bytes_sent '
	'"$http_referer" "$http_user_agent" $request_time '
	'<"$request_body" >"$resp_body"';

	lua_need_request_body on;

	set $resp_body "";
	body_filter_by_lua '

	# Sticky session module for nginx
	# https://bitbucket.org/nginx-goodies/nginx-sticky-module-ng/
	# nginx configure command: ./configure --with-http_ssl_module --add-module=../nginx-sticky-module-ng/ --sbin-path=/usr/local/sbin --with-http_gzip_static_module

	upstream vida_node_server {
	sticky path=/;
	server 127.0.0.1:3000 max_fails=3 fail_timeout=30s;
	server [server2]:3000 max_fails=3 fail_timeout=30s;
	}

	#!/bin/bash


	#### SETUP
	# 1.) Create a simple point layer
	curl -X POST -d '{"layer":"geom","lat":"lat","lon":"lon"}' --header "Content-Type:application/json" http://localhost:7474/db/data/ext/SpatialPlugin/graphdb/addSimplePointLayer

	# 2.) Add a spatial index
	curl -X POST -d '{"name":"geom","config":{"provider":"spatial","geometry_type":"point","lat":"lat","lon":"lon"}}' --header "Content-Type:application/json" http://localhost:7474/db/data/index/node/

	<!DOCTYPE html>
	<html>
	<style type="text/css">
	body {
	font-size: 18px;
	background: #000;
	color: #fff;
	}
	#container {
	width: 600px;