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<?php
namespace Wallabag\CoreBundle\Helper;
use Psr\Log\LoggerInterface as Logger;
use Symfony\Component\DomCrawler\Crawler;
define('REGENERATE_PICTURES_QUALITY', 75);
define('HTTP_PORT', 80);
define('SSL_PORT', 443);
define('BASE_URL','');
class DownloadImages {
private $folder;
private $url;
private $html;
private $fileName;
private $logger;
public function __construct($html, $url, Logger $logger) {
$this->html = $html;
$this->url = $url;
$this->setFolder();
$this->logger = $logger;
}
public function setFolder($folder = "assets/images") {
// if folder doesn't exist, attempt to create one and store the folder name in property $folder
if(!file_exists($folder)) {
mkdir($folder);
}
$this->folder = $folder;
}
public function process() {
//instantiate the symfony DomCrawler Component
$crawler = new Crawler($this->html);
// create an array of all scrapped image links
$this->logger->log('debug', 'Finding images inside document');
$result = $crawler
->filterXpath('//img')
->extract(array('src'));
// download and save the image to the folder
foreach ($result as $image) {
$file = file_get_contents($image);
// Checks
$absolute_path = self::getAbsoluteLink($image, $this->url);
$filename = basename(parse_url($absolute_path, PHP_URL_PATH));
$fullpath = $this->folder."/".$filename;
self::checks($file, $fullpath, $absolute_path);
$this->html = str_replace($image, self::getPocheUrl() . '/' . $fullpath, $this->html);
}
return $this->html;
}
private function checks($rawdata, $fullpath, $absolute_path) {
$fullpath = urldecode($fullpath);
if (file_exists($fullpath)) {
unlink($fullpath);
}
// check extension
$this->logger->log('debug','Checking extension');
$file_ext = strrchr($fullpath, '.');
$whitelist = array('.jpg', '.jpeg', '.gif', '.png');
if (!(in_array($file_ext, $whitelist))) {
$this->logger->log('debug','processed image with not allowed extension. Skipping '.$fullpath);
return false;
}
// check headers
$this->logger->log('debug','Checking headers');
$imageinfo = getimagesize($absolute_path);
if ($imageinfo['mime'] != 'image/gif' && $imageinfo['mime'] != 'image/jpeg' && $imageinfo['mime'] != 'image/jpg' && $imageinfo['mime'] != 'image/png') {
$this->logger->log('debug','processed image with bad header. Skipping '.$fullpath);
return false;
}
// regenerate image
$this->logger->log('debug','regenerating image');
$im = imagecreatefromstring($rawdata);
if ($im === false) {
$this->logger->log('error','error while regenerating image '.$fullpath);
return false;
}
switch ($imageinfo['mime']) {
case 'image/gif':
$result = imagegif($im, $fullpath);
$this->logger->log('debug','Re-creating gif');
break;
case 'image/jpeg':
case 'image/jpg':
$result = imagejpeg($im, $fullpath, REGENERATE_PICTURES_QUALITY);
$this->logger->log('debug','Re-creating jpg');
break;
case 'image/png':
$this->logger->log('debug','Re-creating png');
$result = imagepng($im, $fullpath, ceil(REGENERATE_PICTURES_QUALITY / 100 * 9));
break;
}
imagedestroy($im);
return $result;
}
private static function getAbsoluteLink($relativeLink, $url)
{
/* return if already absolute URL */
if (parse_url($relativeLink, PHP_URL_SCHEME) != '') {
return $relativeLink;
}
/* queries and anchors */
if ($relativeLink[0] == '#' || $relativeLink[0] == '?') {
return $url.$relativeLink;
}
/* parse base URL and convert to local variables:
$scheme, $host, $path */
extract(parse_url($url));
/* remove non-directory element from path */
$path = preg_replace('#/[^/]*$#', '', $path);
/* destroy path if relative url points to root */
if ($relativeLink[0] == '/') {
$path = '';
}
/* dirty absolute URL */
$abs = $host.$path.'/'.$relativeLink;
/* replace '//' or '/./' or '/foo/../' with '/' */
$re = array('#(/\.?/)#', '#/(?!\.\.)[^/]+/\.\./#');
for ($n = 1; $n > 0; $abs = preg_replace($re, '/', $abs, -1, $n)) {
}
/* absolute URL is ready! */
return $scheme.'://'.$abs;
}
public static function getPocheUrl()
{
$baseUrl = "";
$https = (!empty($_SERVER['HTTPS'])
&& (strtolower($_SERVER['HTTPS']) == 'on'))
|| (isset($_SERVER["SERVER_PORT"])
&& $_SERVER["SERVER_PORT"] == '443') // HTTPS detection.
|| (isset($_SERVER["SERVER_PORT"]) //Custom HTTPS port detection
&& $_SERVER["SERVER_PORT"] == SSL_PORT)
|| (isset($_SERVER['HTTP_X_FORWARDED_PROTO'])
&& $_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https');
$serverport = (!isset($_SERVER["SERVER_PORT"])
|| $_SERVER["SERVER_PORT"] == '80'
|| $_SERVER["SERVER_PORT"] == HTTP_PORT
|| ($https && $_SERVER["SERVER_PORT"] == '443')
|| ($https && $_SERVER["SERVER_PORT"]==SSL_PORT) //Custom HTTPS port detection
? '' : ':' . $_SERVER["SERVER_PORT"]);
if (isset($_SERVER["HTTP_X_FORWARDED_PORT"])) {
$serverport = ':' . $_SERVER["HTTP_X_FORWARDED_PORT"];
}
// $scriptname = str_replace('/index.php', '/', $_SERVER["SCRIPT_NAME"]);
// if (!isset($_SERVER["HTTP_HOST"])) {
// return $scriptname;
// }
$host = (isset($_SERVER['HTTP_X_FORWARDED_HOST']) ? $_SERVER['HTTP_X_FORWARDED_HOST'] : (isset($_SERVER['HTTP_HOST']) ? $_SERVER['HTTP_HOST'] : $_SERVER['SERVER_NAME']));
if (strpos($host, ':') !== false) {
$serverport = '';
}
// check if BASE_URL is configured
if(BASE_URL) {
$baseUrl = BASE_URL;
} else {
$baseUrl = 'http' . ($https ? 's' : '') . '://' . $host . $serverport;
}
return $baseUrl;
}
}
|
