A Simple chat server implemented in Node.js

chat.js

 //fs module is required for writing conversations and host info logging.
 var net = require('net');
 var fs  = require('fs');

 var sockets = [];
 var people  = {};
 // Hosts are saved in hosts file and conversation is saved in conversation file.
 var hosts = 'hosts.txt';
 var conv  = 'conversation.txt';
 var server = net.createServer(function(socket){
     sockets.push(socket);
     var host = socket.remoteAddress+":"+socket.remotePort;
     socket.write("Hellow "+host+'\n');
     fs.appendFile('hosts.txt',host+'\n', function(err){
         if(err) throw err;
         console.log(host+" host is added to the list successfully");
     });
     socket.on('data',function(data){
     // appendFile is an Asynchronous call.
     fs.appendFile('conversation.txt',host+":"+data,"utf-8", function(err){
         if(err) throw err; });
     for(var i=0;i<sockets.length;i++){
         if(sockets[i]==this) continue; 
       sockets[i].write(host+"->"+data);  }
     });
     socket.on('end',function(){
     var i = sockets.indexOf(socket);
     sockets.splice(i,1);
    });
     });

 server.listen(8080);