web.js

var PORT = 5000;

var http = require('http');
var url = require('url');
var querystring = require('querystring');

var bins = {};

var emptyBin = {
		'key': '',
		'date': '',
		'data': '{ "message" : "no bin found" }'
	};

var generateKey = function () {
	var max = Math.pow(16, 8);
	var min = Math.pow(16, 7);
	var keyNumber = Math.floor(Math.random() * (max - min)) + min;
	var keyHex = keyNumber.toString(16);
	
	if (!bins.hasOwnProperty(keyHex)) {
		return keyHex;
	}
	
	return generateKey();
};

var addBin = function (data) {
	if (!data){
		data = '';
	}
	
	var key = generateKey();
	
	var newBin = {	
		'key': key, 
		'date': Date.now(), 
		'data': data
	};
	
	bins[key] = newBin;
	
	return newBin;
};

var getBin = function (key) {
	if ( bins.hasOwnProperty(key) ) {
		return bins[key];
	} else {
		return emptyBin;
	}
};

var respond = function (response, message){
	response.writeHead(200, { 'content-type' : 'text/plain' });
	response.end(message + '\n');
};

var s = http.createServer();

s.on('request', function (request, response){ 
	var message;
	var urlParts = url.parse(request.url);
	
	var bin, key, property;
	
	console.log(request.method);
	switch (request.method) {
		case "POST":
			bin = addBin();
			message = "access at http://jsonbin.herokuapp.com/" + bin.key;
			respond(response, message);
			break;
		case "PUT":
			key = urlParts.pathname.substr(1);
			bin = getBin(key);

			if (bin === emptyBin) {
				message = bin.data;
				respond(response, message);
				break;
			}
			
			var data = '';
			request.on('data', function (chunk) {
				data += chunk;
			});
			request.on('end', function () {
				var post = querystring.parse(data);
				bin.data = JSON.stringify(post);
				message = bin.data;
				respond(response, message);
			});
			break;
		case "GET":
			if (urlParts.pathname === "/all") {
				message = 'All\n';
				
				for(property in bins) {
					if(bins.hasOwnProperty(property)) {
						bin = bins[property];
						message += 'key: ' + bin.key + '\n' + 'data: ' + bin.data + '\n\n';
					}
				}
				
				respond(response, message);
				break;
			}
				
			key = urlParts.pathname.substr(1);
			bin = getBin(key);
			message = bin.data;
			respond(response, message);
			break;		
		default:
			message = "no action specified/n";
			respond(response, message);
			break;
	}
});

s.listen(process.env.PORT || PORT);