<?php /** * wallabag, self hostable application allowing you to not miss any content anymore * * @category wallabag * @author Nicolas LÅ“uillet <nicolas@loeuillet.org> * @copyright 2013 * @license http://opensource.org/licenses/MIT see COPYING file */ final class Picture { /** * Changing pictures URL in article content */ public static function filterPicture($content, $url, $id) { $matches = array(); $processing_pictures = array(); // list of processing image to avoid processing the same pictures twice preg_match_all('#<\s*(img)[^>]+src="([^"]*)"[^>]*>#Si', $content, $matches, PREG_SET_ORDER); foreach($matches as $i => $link) { $link[1] = trim($link[1]); if (!preg_match('#^(([a-z]+://)|(\#))#', $link[1])) { $absolute_path = self::_getAbsoluteLink($link[2], $url); $filename = basename(parse_url($absolute_path, PHP_URL_PATH)); $directory = self::_createAssetsDirectory($id); $fullpath = $directory . '/' . $filename; if (in_array($absolute_path, $processing_pictures) === true) { // replace picture's URL only if processing is OK : already processing -> go to next picture continue; } if (self::_downloadPictures($absolute_path, $fullpath) === true) { $content = str_replace($matches[$i][2], $fullpath, $content); } $processing_pictures[] = $absolute_path; } } return $content; } /** * Get absolute URL */ private static function _getAbsoluteLink($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; } /** * Downloading pictures * * @return bool true if the download and processing is OK, false else */ private static function _downloadPictures($absolute_path, $fullpath) { $rawdata = Tools::getFile($absolute_path); $fullpath = urldecode($fullpath); if(file_exists($fullpath)) { unlink($fullpath); } // check extension $file_ext = strrchr($fullpath, '.'); $whitelist = array(".jpg",".jpeg",".gif",".png"); if (!(in_array($file_ext, $whitelist))) { Tools::logm('processed image with not allowed extension. Skipping ' . $fullpath); return false; } // check headers $imageinfo = getimagesize($absolute_path); if ($imageinfo['mime'] != 'image/gif' && $imageinfo['mime'] != 'image/jpeg'&& $imageinfo['mime'] != 'image/jpg'&& $imageinfo['mime'] != 'image/png') { Tools::logm('processed image with bad header. Skipping ' . $fullpath); return false; } // regenerate image $im = imagecreatefromstring($rawdata); if ($im === false) { Tools::logm('error while regenerating image ' . $fullpath); return false; } switch ($imageinfo['mime']) { case 'image/gif': $result = imagegif($im, $fullpath); break; case 'image/jpeg': case 'image/jpg': $result = imagejpeg($im, $fullpath, REGENERATE_PICTURES_QUALITY); break; case 'image/png': $result = imagepng($im, $fullpath, ceil(REGENERATE_PICTURES_QUALITY / 100 * 9)); break; } imagedestroy($im); return $result; } /** * Create a directory for an article * * @param $id ID of the article * @return string */ private static function _createAssetsDirectory($id) { $assets_path = ABS_PATH; if (!is_dir($assets_path)) { mkdir($assets_path, 0715); } $article_directory = $assets_path . $id; if (!is_dir($article_directory)) { mkdir($article_directory, 0715); } return $article_directory; } /** * Remove the directory * * @param $directory * @return bool */ public static function removeDirectory($directory) { if (is_dir($directory)) { $files = array_diff(scandir($directory), array('.','..')); foreach ($files as $file) { (is_dir("$directory/$file")) ? self::removeDirectory("$directory/$file") : unlink("$directory/$file"); } return rmdir($directory); } } }