Install Node.js
2016/01/23 |
Install ServerSide JavaScript Environment "Node.js".
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[1] | Install Node.js 5.x. |
root@www:~# curl -O https://deb.nodesource.com/setup_5.x root@www:~# sh setup_5.x
root@www:~#
root@www:~# apt-get -y install nodejs node -v v5.5.0 |
[2] | Create a test tool. It's possible to do it as a common user. |
ubuntu@www:~$
vi helloworld.js var http = require('http'); http.createServer(function (req, res) { res.writeHead(200, {'Content-Type': 'text/plain'}); res.end('Hello World\n'); }).listen(1337, '127.0.0.1'); console.log('listening on http://127.0.0.1:1337/'); # run server ubuntu@www:~$ node helloworld.js &
# verify (it's OK if following reply is back ) ubuntu@www:~$ curl http://127.0.0.1:1337/ Hello World |
[3] | Install Socket.IO and create a test apprication with using WebSocket. |
ubuntu@www:~$
npm install socket.io express
ubuntu@www:~$
vi chat.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); }); }); http.listen(1337, function(){ console.log('listening on *:1337'); });
ubuntu@www:~$
vi index.html <!DOCTYPE html> <html> <head> <title>WebSocket Chat</title> </head> <body> <form action=""> <input id="sendmsg" autocomplete="off" /><button>Send</button> </form> <ul id="messages" style="list-style-type: decimal; font-size: 16px; font-family: Arial;"></ul> <script src="/socket.io/socket.io.js"></script> <script src="http://code.jquery.com/jquery.min.js"></script> <script> var socket = io(); $('form').submit(function(){ socket.emit('chat message', $('#sendmsg').val()); $('#sendmsg').val(''); return false; }); socket.on('chat message', function(msg){ $('#messages').append($('<li style="margin-bottom: 5px;">').text(msg)); }); </script> </body> </html> node chat.js listening on *:1337 |
Access to "http://(server's hostname or IP address):1337/" from a Client computer to make sure sample app works normally. |