<?php
error_reporting(0);
$cache_life = 60; //caching time, in seconds
$download = false;
if (!isset($_REQUEST['url'])) {
  echo __LINE__;die();
}
$url = $_REQUEST['url'];
$url = trim(urldecode($url));
if ($url == '') {
    exit();
}
if (!stristr($url, 'http://') and !stristr($url, 'https://')) {
   $url = 'http://' . $url;
}
$url_segs = parse_url($url);
if (!isset($url_segs['host'])) {
    exit();
}
$here = dirname(__FILE__) . DIRECTORY_SEPARATOR;
$bin_files = $here . 'bin' . DIRECTORY_SEPARATOR;
$jobs = $here . 'jobs' . DIRECTORY_SEPARATOR;
$cache = $here . 'cache' . DIRECTORY_SEPARATOR;
if (!is_dir($jobs)) {
	 
    mkdir($jobs);
    file_put_contents($jobs . 'index.php', '<?php exit(); ?>');
}
if (!is_dir($cache)) {
	 
    mkdir($cache);
    file_put_contents($cache . 'index.php', '<?php exit(); ?>');
}
$w = 1024;
$h = 768;
if (isset($_REQUEST['w'])) {
    $w = intval($_REQUEST['w']);
}
if (isset($_REQUEST['h'])) {
    $h = intval($_REQUEST['h']);
}
if (isset($_REQUEST['clipw'])) {
    $clipw = intval($_REQUEST['clipw']);
}
if (isset($_REQUEST['cliph'])) {
    $cliph = intval($_REQUEST['cliph']);
}
if (isset($_REQUEST['download'])) {
    $download = $_REQUEST['download'];
}

$url = strip_tags($url);
$url = str_replace(';', '', $url);
$url = str_replace('"', '', $url);
$url = str_replace('\'', '/', $url);
$url = str_replace('<?', '', $url);
$url = str_replace('<?', '', $url);
$url = str_replace('\077', ' ', $url);
$screen_file = $url_segs['host'] . crc32($url) . '_' . $w . '_' . $h . '.jpg';
$cache_job = $cache . $screen_file;
$refresh = false;
if (is_file($cache_job)) {
    $filemtime = @filemtime($cache_job); // returns FALSE if file does not exist
	
    if (!$filemtime or (time() - $filemtime >= $cache_life)) {
        $refresh = true;
    }
	if (isset($_GET['cache'])) {
		if($_GET['cache']==0)
		$refresh = true;
	}
}

//$url = escapeshellcmd($url);
if (!is_file($cache_job) or $refresh == true) {
	 
    $src = "
    var page = require('webpage').create();
    page.viewportSize = { width: {$w}, height: {$h} };
    ";
    if (isset($clipw) && isset($cliph)) {
        $src .= "page.clipRect = { top: 0, left: 0, width: {$clipw}, height: {$cliph} };";
    }
    $src .= "
    page.open('{$url}', function () {
        page.render('{$screen_file}');
        phantom.exit();
    });
    ";
    $job_file = $jobs . $url_segs['host'] . crc32($src) . '.js';
    file_put_contents($job_file, $src);
    $exec = $bin_files . 'phantomjs ' . $job_file;
	 
	
    //$escaped_command = escapeshellcmd($exec);
	 $escaped_command =  $exec;
	 
	 
    exec($escaped_command);
   
    
   
    if (is_file($here . $screen_file)) {  
	 
        @rename($here . $screen_file, $cache_job) ;
    }
}
 
if (is_file($cache_job)) {
	 
    if ($download != false) {
		  
        $file = $cache_job;
        $file_name=basename($file);
        $type = 'image/jpeg';
        header("Content-disposition: attachment; filename={$file_name}");
        header("Content-type: {$type}");
        readfile($file);
    } else {
		 
        $file = $cache_job;
        $type = 'image/jpeg';
        header('Content-Type:' . $type);
        header('Content-Length: ' . filesize($file));
        readfile($file);
    }
}