nodejs

var http = require('http').createServer(onRequest),
    io = require('socket.io').listen(http),
    mysql = require('mysql'),
    fs = require('fs');

http.listen(8080);

var client = mysql.createConnection( {
    host: 'localhost',
    user: 'root',
    password: ''
} );

function onRequest( request, response ) {
    console.log('Request received!');
    response.writeHead( 200, { 'Content-Type': 'text/html' } );
    response.end();
}

io.sockets.on('connection', function ( socket ) {

    socket.on( 'actionbar', function ( char_id ) {
        var table = 'character_action';
        var database = 'n_characters';
        var output = 0;

        client.query( 'USE ' + database );
        client.query( 'SELECT data FROM ' + table + ' WHERE character_id = ' + char_id, function ( err, rows ) {
            if ( err ) throw err;

            if ( rows[0]['data'].length != 0 )
                output = rows[0]['data'];
            else
                output = 0;

            socket.emit( 'result', output );
        } );

        socket.on( 'update', function ( data ) {
            console.log('Update request received!');
            client.query( 'UPDATE ' + table + ' SET data = \'' + data + '\' WHERE character_id = ' + char_id, function ( err, result ) {
                if ( err ) throw err;
            } );
        } );
    });
});