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, "socket.io": "0.9.6"
}
}
Next, create the
app.js
file in the same directory with the contents of
Listing 21-7
.
Per usual, the code sets
up an Express server. As in the paint example, it connects Socket.io to the app to listen for socket connections.
Listing 21-7:
Pong app.js server code
var express = require('express'),
app = module.exports = express.createServer(),
io = require('socket.io').listen(app);
app.configure(function(){
app.use(express.bodyParser());
app.use(express.static(__dirname + '/public'));
});
app.listen(3000);
var games = [];
io.sockets.on('connection',function(socket) {
var game = null;
for(var i=0;i<games.length;i++) {
if(games[i].length < 2) {
game = i;
}
}
if(game === null) {
games.push([])
game = games.length-1;
}
games[game].push(socket);
socket.set('game',game);
if(games[game].length == 2) {
games[game][0].set('partner',socket);
games[game][1].set('partner',games[game][0]);
games[game][0].emit('master');
games[game][1].emit('slave');
}
socket.on('delay',function(data) {
socket.get('partner',function(err,partner) {
if(partner) {
data.steps += 1;
partner.emit('delay',data);
}
});
});
