FrontendLectures/chatServer/server.js

//to chat: http://codepen.io/anon/pen/RoaJZG?editors=0010
//http://js.do/code/flexichat
http = require('http');
var history = [];
var messageId = 0;
server = http.createServer(function(req, res){
    //console.dir(req);
    if (req.method == "POST"){
        var body = '';
        req.on('data', function (data) {
                body += data;
        });
        req.on('end', function () {
                console.log("Body: " + body);
                message = JSON.parse(body);
                var timestamp =(new Date()).getTime(); 
                if (!("messageId" in message) || (Object.keys(message).length > 1)){
                    message.timestamp  = timestamp;
                    history[messageId] = message;
                    messageId++;
                }
                if ("messageId" in message){
                    messages = history.slice(+message.messageId);
//                    console.log("slice: " + messages.length)
                    res.end(JSON.stringify({timestamp: timestamp, messageId: messageId, messages: messages}))
                    console.log({timestamp: timestamp, messageId: messageId, messages: messages})
                }
                else {
                    res.end(JSON.stringify({timestamp: timestamp, messageId: messageId}))
                    console.log({timestamp: timestamp, messageId: messageId})
                }
        });

        res.setHeader('Access-Control-Allow-Origin', '*');
        res.setHeader('Access-Control-Request-Method', '*');
        res.setHeader('Access-Control-Allow-Methods', 'OPTIONS, GET, POST');
        res.setHeader('Access-Control-Allow-Headers', '*');
        res.writeHead(200, {'Content-Type': 'text/json'});
        //res.end('post received');
    }
});

port = 8070;
host = '164.138.30.21';
server.listen(port, host);
console.log("Listen...");