Node.js 18 : Install2024/05/31 |
Install Node.js 18. |
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[1] | Install Node.js 18 and try to run test script. |
root@dlp:~#
root@dlp:~# apt -y install nodejs npm node -v v18.19.1 # verify to create test script
root@dlp:~# cat > nodejs_test.js <<'EOF'
var http = require('http');
var server = http.createServer(function(req, res) {
res.write("Hello, This is the Node.js Simple Web Server!\n");
res.end();
}).listen(8080);
EOF
root@dlp:~#
node nodejs_test.js & [1] 27114
root@dlp:~#
root@dlp:~# curl localhost:8080 Hello, This is the Node.js Simple Web Server! kill 27114 |
[2] | Create a sample chat application which WebSocket is implemented to verify working. |
ubuntu@dlp:~$
npm install fs socket.io express
ubuntu@dlp:~$
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@dlp:~$
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 |
[3] | Access to the sample application to verify it works normally. |
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