apbstatus.js

var http = require('http'),
net = require("net"),
fs = require("fs"),
Canvas = require('canvas');

var path_regex = /^\/apb\/status[\/]?$/;

var image_cache;

var servers = [{
    "name": "Login",
    "port": 1001,
    "host": "apb.login.gamersfirst.com"
}, {
    "name": "Colby",
    "port": 1031,
    "host": "173.195.41.34"
}, {
    "name": "Joker",
    "port": 1031,
    "host": "173.195.39.20"
}, {
    "name": "Patriot",
    "port": 1031,
    "host": "173.195.33.202"
}, {
    "name": "Obeya",
    "port": 1031,
    "host": "173.195.41.33"
}];

var testServer = function (server) {
    var stream = net.createConnection(server.port, server.host);
    var tt = setTimeout(function () {
        server.status = 0;
        stream.destroy();
    }, 2000);
    
    stream.on("connect", function () {
        server.status = 1;
        stream.destroy();
    });
    stream.on("error", function () {
        server.status = 0;
        stream.destroy();
    });
    stream.on("close", function () {
        // Update Cache
        image_cache = getCanvas().toBuffer();
        clearTimeout(tt);
    });
};

var updateServers = function () {
    for (var i = 0; i < servers.length; i++) {
        var server = servers[i];
        testServer(server);
    }
};

var getCanvas = function () {
    var offset = 10;
    var canvas_obj = new Canvas(servers.length * 90, 30);
    var context = canvas_obj.getContext('2d');
    
    context.clearRect(0, 0, canvas_obj.width, canvas_obj.height);
    context.font = '20px Impact Bold';

    for (var i = 0; i < servers.length; i++) {
        context.fillStyle = servers[i].status ? "green" : "red";
        context.fillText(servers[i].name, offset, 20);
        
        offset += 90;
    }  
    return canvas_obj;
};

updateServers();

// Update status every 60 seconds
setInterval(updateServers, 60000);

http.createServer(function (request, response) {
  
    if (path_regex.test(request.url)) {
        response.writeHead(200, {
            'Content-Type': 'image/png'
        });
        response.end(image_cache);
    }
    else {
        response.writeHead(404, {
            'Content-Type': 'text/html'
        });
        response.end("Not Found");
    }
}).listen(64441);

console.log('APB Status Server Running');