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var os = require('os');
var http = require('http');
var ps = require('portscanner');
var dispatcher = require('httpdispatcher');
var spawn = require('child_process').spawn;
var nl = require('./numberlogger.js');
var services = require('./services.js');
var PORT = 3369;
var logger = function(name,length) {
this.name = name;
this.sec = new nl(name+":sec",length);
this.min = new nl(name+":min",length);
this.hrs = new nl(name+":hrs",length);
this.day = new nl(name+":day",length);
this.time = new Date();
}
logger.prototype.add = function(time,x) {
function average(l,n) {
var sum = 0;
for (var i=0;i<n;++i)
sum += l.ns[l.len - 1 - i];
return sum/n;
}
if (time.getDay()!=this.time.getDay())
this.day.add(average(this.hrs,24));
if (time.getHours() != this.time.getHours())
this.hrs.add(average(this.min,60));
if (time.getMinutes() != this.time.getMinutes())
this.min.add(average(this.sec,60));
this.sec.add(x);
this.time = time;
}
logger.prototype.stringify = function() {
return [this.sec.stringify(),this.min.stringify(),this.hrs.stringify(),this.day.stringify()];
}
var cpustat = new logger("cpu",100);
var memstat = new logger("mem",100);
var serverstat={
"hostname":os.hostname(),
"release":"undef",
"uptime":"",
"load":[0,0,0],
"cpu":cpustat.stringify(),
"mem":memstat.stringify(),
"services":{}
}
serverstat.release = os.release();
function secondsToString(seconds)
{
function adds(x,a){
return x + " " + a + " ";
}
var numdays = Math.floor(seconds / 86400); seconds%=86400;
var numhours = Math.floor(seconds / 3600); seconds%=3600;
var numminutes = Math.floor(seconds / 60); seconds%=60;
return adds(numdays,"day") + adds(numhours,"hrs")+ adds(numminutes,"min") + adds(seconds,"sec");
}
function checkp(key){
ps.checkPortStatus(services[key], 'localhost', function(error, status) {
// Status is 'open' if currently in use or 'closed' if available
// console.log(key,status);
if (status=='open')
serverstat.services[key]=true;
else
serverstat.services[key]=false;
})
}
function refreshStat(){
for (key in services) {
if (services.hasOwnProperty(key)) {
checkp(key);
}
}
serverstat.uptime = os.uptime();
serverstat.load = os.loadavg();
}
function handleRequest(request, response){
try {
//log the request on console
// console.log(request.url);
//Disptach
dispatcher.dispatch(request, response);
} catch(err) {
console.log(err);
}
}
//For all your static (js/css/images/etc.) set the directory name (relative path).
dispatcher.setStatic('resources');
//A sample GET request
dispatcher.onGet("/", function(req, res) {
res.writeHead(200, {'Content-Type': 'application/json','Access-Control-Allow-Origin': '*'});
res.end(JSON.stringify(serverstat));
});
//A sample POST request
//dispatcher.onPost("/post1", function(req, res) {
// res.writeHead(200, {'Content-Type': 'text/plain'});
// res.end('Got Post Data');
//});
//Create a server
var server = http.createServer(handleRequest);
//Lets start our server
server.listen(PORT, function(){
//Callback triggered when server is successfully listening. Hurray!
console.log("Server listening on: http://localhost:%s", PORT);
});
refreshStat();
setInterval(refreshStat,1000);
function getCPUInfo(callback){
var cpus = os.cpus();
var user = 0;
var nice = 0;
var sys = 0;
var idle = 0;
var irq = 0;
var total = 0;
for(var cpu in cpus){
user += cpus[cpu].times.user;
nice += cpus[cpu].times.nice;
sys += cpus[cpu].times.sys;
irq += cpus[cpu].times.irq;
idle += cpus[cpu].times.idle;
}
var total = user + nice + sys + idle + irq;
return {
'idle': idle,
'total': total
};
}
function getUsage(callback, free){
var stats = getCPUInfo();
setInterval(function() {
var nstats = getCPUInfo();
var endIdle = nstats.idle;
var endTotal = nstats.total;
var idle = nstats.idle - stats.idle;
var total = nstats.total - stats.total;
var perc = 1 - idle / total;
stats = nstats;
var time = new Date();
cpustat.add(time,perc);
memstat.add(time,memPercentage());
serverstat.cpu=cpustat.stringify();
serverstat.mem=memstat.stringify();
}, 1000 );
}
function memPercentage(){
return 1 - os.freemem() / os.totalmem();
}
getUsage();
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