From d50bf206dea24e223ca57f92ec28daf2b6bbad37 Mon Sep 17 00:00:00 2001
From: Tuowen Zhao <ztuowen@gmail.com>
Date: Sat, 25 Jun 2016 22:01:34 -0600
Subject: switched to ExpressJS

---
 app.js          | 239 +++++++++++++++++++++++++++-----------------------------
 config.js       |   2 +
 numberlogger.js |  20 ++---
 package.json    |   9 ++-
 services.js     |   1 -
 5 files changed, 131 insertions(+), 140 deletions(-)
 create mode 100644 config.js
 delete mode 100644 services.js

diff --git a/app.js b/app.js
index 165dbeb..1f2a325 100644
--- a/app.js
+++ b/app.js
@@ -1,84 +1,93 @@
 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 config = require('./config.js');
+var express = require('express');
+var compression = require('compression');
 
 var PORT = 3369;
 
-var logger = function(name,length) {
+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.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) {
+logger.prototype.add = function (time, x) {
+    function average(l, n) {
         var sum = 0;
-        for (var i=0;i<n;++i)
+        for (var i = 0; i < n; ++i)
             sum += l.ns[l.len - 1 - i];
-        return sum/n;
+        return sum / n;
     }
-    if (time.getDay()!=this.time.getDay())
-        this.day.add(average(this.hrs,24));
+
+    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));
+        this.hrs.add(average(this.min, 60));
     if (time.getMinutes() != this.time.getMinutes())
-        this.min.add(average(this.sec,60));
+        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 + " ";
+};
+
+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();
+        };
     }
-    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)) {
+    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);
         }
     }
@@ -86,46 +95,11 @@ function refreshStat(){
     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);
+setInterval(refreshStat, 1000);
 
-function getCPUInfo(callback){ 
+function getCPUInfo() {
     var cpus = os.cpus();
 
     var user = 0;
@@ -133,52 +107,67 @@ function getCPUInfo(callback){
     var sys = 0;
     var idle = 0;
     var irq = 0;
-    var total = 0;
 
-    for(var cpu in cpus){
+    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;
-    }
+            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, 
+        'idle': idle,
         'total': total
     };
 }
 
-function getUsage(callback, free){ 
-        
+function getUsage() {
+
     var stats = getCPUInfo();
 
-    setInterval(function() {
+    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;
+        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 );
+        cpustat.add(time, perc);
+        memstat.add(time, memPercentage());
+    }, 1000);
 }
 
-function memPercentage(){
+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);
diff --git a/config.js b/config.js
new file mode 100644
index 0000000..bb2699e
--- /dev/null
+++ b/config.js
@@ -0,0 +1,2 @@
+module.exports.services = {"ssh": 22, "minecraft": 25565};
+module.exports.description = "This is my desc";
diff --git a/numberlogger.js b/numberlogger.js
index 764027e..95b9b4f 100644
--- a/numberlogger.js
+++ b/numberlogger.js
@@ -1,18 +1,18 @@
-var numberLogger = function(name,length){
-    this.name=name;
+var numberLogger = function (name, length) {
+    this.name = name;
     this.ns = new Array(length);
     this.len = length;
-    for (i=0;i<length;++i)
+    for (i = 0; i < length; ++i)
         this.ns[i] = 0;
-}
+};
 
-numberLogger.prototype.add = function(x) {
-    this.ns.splice(0,1);
+numberLogger.prototype.add = function (x) {
+    this.ns.splice(0, 1);
     this.ns.push(x);
-}
+};
 
-numberLogger.prototype.stringify = function() {
-    return {"name":this.name,"dat":this.ns,"len":this.length};
-}
+numberLogger.prototype.stringify = function () {
+    return {"name": this.name, "dat": this.ns, "len": this.length};
+};
 
 module.exports = numberLogger;
diff --git a/package.json b/package.json
index 38c1be5..42d936d 100644
--- a/package.json
+++ b/package.json
@@ -1,9 +1,9 @@
 {
   "name": "serverstat",
   "version": "0.0.1",
-  "description":"server status generator",
+  "description": "server status generator",
   "bin": {
-      "bilicom": "./bin/serverstat.js"
+    "bilicom": "./bin/serverstat.js"
   },
   "author": {
     "name": "Tuowen Zhao",
@@ -15,7 +15,8 @@
   },
   "license": "MIT",
   "dependencies": {
-      "portscanner": "1.0.0",
-      "httpdispatcher": "1.0.0"
+    "portscanner": "1.0.0",
+    "express": "4.14.0",
+    "compression": "1.6.2"
   }
 }
diff --git a/services.js b/services.js
deleted file mode 100644
index e812e50..0000000
--- a/services.js
+++ /dev/null
@@ -1 +0,0 @@
-module.exports = {"ssh":22,"minecraft":25565};
-- 
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