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index.js
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index.js
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const express = require('express'); // express is a Node.js web application framework
const app = express(); // instance of the express server
const server = require('http').Server(app); // for serving files over http
const io = require('socket.io')(server); //socket.io web socket server
const path = require('path'); // for handling and transforming file paths
const fs = require('fs'); // for file I/O using standard POSIX functions
const os = require('os'); //node.js module which provides operating system related utilities
process.on('uncaughtException', (err) => {
console.log(">> Uncaught exception from node.js process: "+err);
});
app.use(express.static(path.join(__dirname, 'public'))); // we need to serve static files from the public directory
const port = 5000;
server.listen(port);
// var io = socketIO.listen(app);
io.on('connection', function(socket) {
// convenience function to log server messages on the client
function log() {
var array = ['Message from server:'];
array.push.apply(array, arguments);
socket.emit('log', array);
}
socket.on('message', function(message) {
log('Client said: ', message);
// for a real app, would be room-only (not broadcast)
socket.broadcast.emit('message', message);
});
socket.on('create or join', function(room) {
log('Received request to create or join room ' + room);
var numClients = io.engine.clientsCount;
log('Room ' + room + ' now has ' + numClients + ' client(s)');
if (numClients === 1) {
socket.join(room);
log('Client ID ' + socket.id + ' created room ' + room);
socket.emit('created', room, socket.id);
} else if (numClients === 2) {
log('Client ID ' + socket.id + ' joined room ' + room);
// io.sockets.in(room).emit('join', room);
socket.join(room);
socket.emit('joined', room, socket.id);
io.sockets.in(room).emit('ready', room);
socket.broadcast.emit('ready', room);
} else { // max two clients
socket.emit('full', room);
}
});
socket.on('ipaddr', function() {
var ifaces = os.networkInterfaces();
for (var dev in ifaces) {
ifaces[dev].forEach(function(details) {
if (details.family === 'IPv4' && details.address !== '127.0.0.1') {
socket.emit('ipaddr', details.address);
}
});
}
});
socket.on('bye', function(){
console.log('received bye');
});
});
module.exports = app;