var HOST = 'localhost'

var PORT = 12345;

var EXIT_TIMEOUT = 300e3;

print('automatic exit after ' + (EXIT_TIMEOUT / 1e3) + ' seconds');

setTimeout(function () {

print('exit timer');

EventLoop.requestExit();

}, EXIT_TIMEOUT);

print('listen on ' + HOST + ':' + PORT);

EventLoop.server(HOST, PORT, function (fd, addr, port) {

print('new connection on fd ' + fd + ' from ' + addr + ':' + port);

EventLoop.setReader(fd, function (fd, data) {

var b, i, n, x;

// Handle socket data carefully: if you convert it to a string,

// it may not be valid UTF-8 etc. Here we operate on the data

// directly in the buffer.

b = data.valueOf(); // ensure we get a plain buffer

n = b.length;

for (i = 0; i < n; i++) {

x = b[i];

if (x >= 0x61 && x <= 0x7a) {

b[i] = x - 0x20; // uppercase

}

}

print('read data on fd ' + fd + ', length ' + data.length);

EventLoop.write(fd, data);

});

});