<?php
/*
 * Author: Jozef Izso
 * Licence: GNU GPL <http://www.gnu.org/licenses/gpl.html>
 *
 */

// force image
if (isset($_GET['img'])) {
	$f = $_GET['img'];
	
	if (file_exists($f)) {
		sendFile($f);
	}
	else
		rotatorDie();
}

// get path and random image
$path = '';
if (isset($_GET['path'])) {
	$path = $_GET['path'];
}
else
	$path = '.';

rtrim($path, '/');

if (file_exists($path)) {
	$files = glob($path .'/*.jpg');
	
	if($files === false)
		rotatorDie();
	else {
		$i = rand(0, count($files)-1);
		$f = $files[$i];
		unset($files);
		
		sendFile($f);
	}
}
else
	rotatorDie();

/* Functions */

function getMime($ext) {
	switch($ext) {
		case 'jpg':
		case 'jpeg':
			return 'image/jpeg';
			break;
		case 'gif':
			return 'image/gif';
			break;
		case 'png':
			return 'image/png';
			break;
		default:
			return false;
			break;
	}
}

function sendFile($f) {
	$ext = substr($f, -3, 3);
	$mime = getMime($ext);
	if ($mime === false)
		rotatorDie();
	
	header("HTTP/1.1 200 OK");
	header("Content-Type: $mime");
	ob_start();
	readfile($f);
	ob_end_flush();
	exit;
}

function rotatorDie() {
	header("HTTP/1.1 404 Not Found");
	echo '404 Not Found';
	exit;
}

?>