notes/NodeJS Basic Web Chat with Sockets-vHUDkLkb.html
#!/bin/sh
browser="google-chrome"
dir="node_webchat"
mkdir $dir
cd $dir
if [ ! -f "/usr/bin/nodejs" ]
then
sudo apt-get install nodejs
fi
npm install --save express@4.10.2
npm install --save socket.io
cat << EOF > server.js
var app = require('express')();
var http = require('http').Server(app);
var io = require('socket.io')(http);
app.get('/', function(req, res){
res.sendFile(__dirname + '/index.html');
});
io.on('connection', function(socket){
socket.on('chat message', function(msg){
io.emit('chat message', msg);
console.log(msg); //for server monitoring.
//process.stdout.write(msg);
});
});
http.listen(3000, function(){
console.log('listening on *:3000');
});
EOF
cat << EOH > index.html
<!doctype html>
<html>
<head>
<title>Socket.IO chat</title>
<style>
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font: 13px Helvetica, Arial; }
form { background: #000; padding: 3px; position: fixed; bottom: 0; width: 100%; }
form input { border: 0; padding: 10px; width: 90%; margin-right: .5%; }
form button { width: 9%; background: rgb(130, 224, 255); border: none; padding: 10px; }
#messages { list-style-type: none; margin: 0; padding: 0; }
#messages li { padding: 5px 10px; }
#messages li:nth-child(odd) { background: #eee; }
</style>
</head>
<body>
<ul id="messages"></ul>
<form action="">
<input id="m" autocomplete="off" /><button>Send</button>
</form>
<script src="https://cdn.socket.io/socket.io-1.2.0.js"></script>
<script src="http://code.jquery.com/jquery-1.11.1.js"></script>
<script>
var socket = io();
\$('form').submit(function(){
socket.emit('chat message', \$('#m').val());
\$('#m').val('');
return false;
});
socket.on('chat message', function(msg){
\$('#messages').append(\$('<li>').text(msg));
});
</script>
</body>
</html>
EOH
$browser "http://127.0.0.1:3000" &
$browser "http://127.0.0.1:3000" &
nodejs server.js
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