Witam,
Próbuje uruchomić skrypt ze strony https://stackoverflow.com/questions/10818636/html5-page-logging-with-mysql-database-in-node-js-with-socket-io (konkretnie drugi).
App.js
var app = require('http').createServer(handler)
, io = require('socket.io').listen(app)
, fs = require('fs')
, mysql = require('mysql')
var client = mysql.createConnection({
host: 'localhost',
user: 'root',
password: '',
});
client.connect();
app.listen(3232);
function handler (req, res) {
fs.readFile(__dirname + '/index.html',
function (err, data) {
if (err) {
res.writeHead(500);
return res.end('Error loading index.html');
}
res.writeHead(200);
res.end(data);
});
}
io.sockets.on('connection', function (socket) {
socket.on('login', function(usr, pass){
var TEST_DATABASE = 'mysqltest';
var TEST_TABLE = 'users';
client.query('USE '+TEST_DATABASE);
client.query('SELECT name FROM '+TEST_TABLE+' WHERE user = "'+usr+'" AND password = "'+pass+'"', function(err, results) {
if (err) throw err;
console.log(results[0]); // [{1: 1}]
socket.emit('retuLogIn',results[0]['name']);
});
});
socket.on('disconnect', function(){
console.log('Server has disconnected');
});
});
Index.html
<html>
<title>WebSocket Client Demo [socket.io]</title>
<script src="http://localhost:3232/socket.io/socket.io.js"></script>
<script>
function connect() {
try
{
var socket = io.connect('http://localhost:3232/');
socket.on("connect",function(){
document.getElementById('status').innerHTML ="Browser has connected to the app server";
socket.emit('login', document.getElementById('txtUser').value, document.getElementById('txtPass').value);
});
socket.on('retuLogIn', function (data) {
document.getElementById('status').innerHTML = 'Welcome '+data;
});
}
catch(err)
{
document.getElementById('status').innerHTML = err.message;
}
}
</script>
<body>
<h1>WebSocket Client Demo</h1>
<div><p id="status">Enter user and password to Log-In</p></div>
<label>User :</label>
<input id="txtUser" type="text" maxlength="10" />
<label>Password :</label>
<input id="txtPass" type="text" maxlength="10" />
<button id="connect" onClick='connect()'/>Log-In</button>
</body>
</html>
Po uruchomieniu wyskakuje błąd:
Error: Cannot find module 'socket.io'
at Function.Module._resolveFilename (module.js:543:15)
at Function.Module._load (module.js:470:25)
at Module.require (module.js:593:17)
at require (internal/module.js:11:18)
at Object.<anonymous> (/var/www/html/fsfs/app.js:2:14)
at Module._compile (module.js:649:30)
at Object.Module._extensions..js (module.js:660:10)
at Module.load (module.js:561:32)
at tryModuleLoad (module.js:501:12)
at Function.Module._load (module.js:493:3)