Server Part1

Welcome to The One Minute Server

The Idea

The idea is to build something with node.js.
I decided to stored objects, just for one minute. What can you do with such a server ?
Let´s discover it.

ArchitectureOverview

Overview

Setup

You need a node-server running. And you can send Get-requests to the
server with objects in the url. e.g. : http://www.server.com/img/l=Base64Coded-Entity.
And you can get available data from the server: http://www.server.com/getdata

Server

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// most important parts
var app = express();
app.locals.datastore = new Array();
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false })); 
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public'))); 
app.use(express.static(path.join(__dirname, 'applications'))); 
app.use('/', index);
app.use('/img', img);
app.use('/getdata', getdata);

Why “img” as path ? Because the first example dependes on
web-tracking, and it is so that you request a pixel from the server with
your tracking-request for most tracking solutions. So i went the same way.

The Img.js

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var express = require('express');
var router = express.Router();
const fs = require('fs');
var url = require('url');
var image = fs.readFileSync('/var/www/html/1px.png');
//******************************************************************************
router.get('/*', function(req, res, next) {
    var datum = new Date();
    var currentTime =  datum.getTime() ;
    var deleteTime =  currentTime - 60000;
    var o = parseUrl(req.url, currentTime );    // get Information from Url to Json
    storeLocal(o,req);                          // store data in local array
    cleanUp(deleteTime,req);                    // delete old data
    res.end(image, 'binary');
});
//******************************************************************************
function parseUrl( requrl, currentTime ){
    var url_parts = url.parse(requrl, true);
    var query = url_parts.query;
    var b = new Buffer(""+query.l, 'base64');
    var o = JSON.parse( b.toString());
    o.timestamp = currentTime;
    o.pkey = ""+currentTime+"_"+o.clientid;
    return o;
}
//******************************************************************************
function cleanUp(cleanupTime, req){
    var temp = [];
    var foundAt =-1;
    for( index in req.app.locals.datastore){
        var objtime = req.app.locals.datastore[index].timestamp;
        if(objtime < cleanupTime){
            foundAt = index;
        }
    }
    if(foundAt > -1){
        req.app.locals.datastore = req.app.locals.datastore.slice(foundAt);
    }
}
//******************************************************************************
function storeLocal(obj,req){
    req.app.locals.datastore.push(obj);
}
//******************************************************************************

I build a small data-transfer-library which you can integrate in any website to send some values. The lib has one function which is “track(JSON-Object)”. More about this in the next posts.