A node.js server that uses mathjax to produce an SVG response.

mathjax-server.js

var http     = require('http')
var qs       = require('querystring');
var mj       = require("mathjax-node");
var socketio = require('socket.io');

var server = http.createServer(function(req, res)
{
	req.on('data', function (chunk)
	{
		var equation = qs.parse(chunk.toString('utf8'))['equation'];

		mj.typeset({math:equation, format:"TeX", svg:true}, function(data)
		{
			res.writeHead(200, {'Content-type': 'text/plain'});

		 	if (data.errors)
		 	{
		 		res.end(data.errors.toString('utf8'));
		 	}
		 	else
		 	{
		 		res.end(data.svg);
		 	}
		});
  	});
});

server.listen(8080, function()
{
	console.log('Listening at: http://localhost:8080');
});

socketio.listen(server).on('connection', function (socket) {});