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var os = require('os');
var ps = require('portscanner');
var nl = require('./numberlogger.js');
var config = require('./config.js');
var express = require('express');
var compression = require('compression');
var PORT = 3369;
var serverstat = {
"uptime": os.uptime(),
"load": [0, 0, 0],
"services": {},
"stats" : {}
};
var serverinfo = {
"hostname": os.hostname(),
"release": os.release(),
"cpuname": os.cpus()[0].model,
"cpunum": os.cpus().length,
"totmem": Math.round(os.totalmem()/1024/1024),
"desc" : config.description,
"stats": {}
};
var statResponse = {};
function checkp(key) {
ps.checkPortStatus(config.services[key], 'localhost', function (error, status) {
serverstat.services[key] = (status == 'open');
})
}
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.setupResponse = function(res){
var host = this;
var stat = [];
function setupSingleStat(id){
stat.push(host[id].name);
res[host[id].name] = function (stat) {
stat.stats[host.name] = host[id].stringify();
};
}
console.log("Setting up response for "+this.name);
setupSingleStat("sec");
setupSingleStat("min");
setupSingleStat("hrs");
setupSingleStat("day");
serverinfo.stats[this.name] = stat;
};
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);
cpustat.setupResponse(statResponse);
memstat.setupResponse(statResponse);
function refreshStat() {
for (var key in config.services) {
if (config.services.hasOwnProperty(key)) {
checkp(key);
}
}
serverstat.uptime = os.uptime();
serverstat.load = os.loadavg();
}
refreshStat();
setInterval(refreshStat, 1000);
function getCPUInfo() {
var cpus = os.cpus();
var user = 0;
var nice = 0;
var sys = 0;
var idle = 0;
var irq = 0;
for (var cpu in cpus)
if (cpus.hasOwnProperty(cpu)) {
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() {
var stats = getCPUInfo();
setInterval(function () {
var nstats = getCPUInfo();
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());
}, 1000);
}
function memPercentage() {
return 1 - os.freemem() / os.totalmem();
}
getUsage();
var app = express();
app.use(compression());
app.get('/', function (req, res) {
res.append('Content-Type', 'application/json');
res.append('Access-Control-Allow-Origin', '*');
res.send(JSON.stringify(serverinfo));
});
app.get('/stat', function (req, res) {
res.append('Content-Type', 'application/json');
res.append('Access-Control-Allow-Origin', '*');
var stat = JSON.parse(JSON.stringify(serverstat));
for (var query in req.query)
if (req.query.hasOwnProperty(query))
statResponse[req.query[query]](stat);
res.send(JSON.stringify(stat));
});
app.listen(PORT);
console.log("Server listening on: %s", PORT);
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