nodejs where to start?

Question

I\'ve installed nodejs and ran couple of simple examples like opening a server on a port and listen on that port.

However, I still can not relate nodejs to web develop

Answer 1

I'd recommend looking at the project Socket.IO and Socket.IO-node. It uses HTML5 WebSockets if available, and falls back automatically and gracefully (no intervention required) to Flash sockets and XHR-polling as necessary

Here's a script to download the files:

mkdir socket.io
cd socket.io
git clone https://github.com/LearnBoost/Socket.IO.git --recursive
git clone https://github.com/LearnBoost/Socket.IO-node.git --recursive

Here's the server.js file:

var http=require('http');
var url=require('url');
var fs=require('fs');
var sys=require('sys');
var io=require('./socket.io/Socket.IO-node');   //adjust path as necessary...

var server=http.createServer(function(req,res){
    res.writeHead(200,{'Content-Type':'text/html'});
    res.write('Hello world');
    res.end();
});
server.listen(8000);

var socket=io.listen(server);

socket.on('connection', function(client){
  onConnection(client);
  client.on('message', function(){
    onMessage();
  })
  client.on('disconnect', function(){
    onDisconnect();
  })
});
function onConnection(client){
  console.log('connection');
  //client.connected;   //tests if connected
  //client.send("message");
  //client.broadcast("message");   //send to all other conns
}
function onMessage(){
  console.log('message');
}
function onDisconnect(){
  console.log('disconnect');
}

});

Run the above server with sudo node server.js

And here is your index.html to be run in a browser: