mirror of
https://github.com/wallabag/wallabag.git
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168 lines
No EOL
5.3 KiB
PHP
168 lines
No EOL
5.3 KiB
PHP
<?php
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/**
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* wallabag, self hostable application allowing you to not miss any content anymore
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*
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* @category wallabag
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* @author Nicolas Lœuillet <nicolas@loeuillet.org>
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* @copyright 2013
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* @license http://opensource.org/licenses/MIT see COPYING file
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*/
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final class Picture
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{
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/**
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* Changing pictures URL in article content
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*/
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public static function filterPicture($content, $url, $id)
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{
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$matches = array();
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$processing_pictures = array(); // list of processing image to avoid processing the same pictures twice
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preg_match_all('#<\s*(img)[^>]+src="([^"]*)"[^>]*>#Si', $content, $matches, PREG_SET_ORDER);
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foreach($matches as $i => $link) {
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$link[1] = trim($link[1]);
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if (!preg_match('#^(([a-z]+://)|(\#))#', $link[1])) {
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$absolute_path = self::_getAbsoluteLink($link[2], $url);
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$filename = basename(parse_url($absolute_path, PHP_URL_PATH));
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$directory = self::_createAssetsDirectory($id);
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$fullpath = $directory . '/' . $filename;
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if (in_array($absolute_path, $processing_pictures) === true) {
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// replace picture's URL only if processing is OK : already processing -> go to next picture
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continue;
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}
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if (self::_downloadPictures($absolute_path, $fullpath) === true) {
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$content = str_replace($matches[$i][2], $fullpath, $content);
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}
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$processing_pictures[] = $absolute_path;
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}
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}
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return $content;
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}
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/**
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* Get absolute URL
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*/
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private static function _getAbsoluteLink($relativeLink, $url)
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{
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/* return if already absolute URL */
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if (parse_url($relativeLink, PHP_URL_SCHEME) != '') return $relativeLink;
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/* queries and anchors */
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if ($relativeLink[0]=='#' || $relativeLink[0]=='?') return $url . $relativeLink;
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/* parse base URL and convert to local variables:
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$scheme, $host, $path */
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extract(parse_url($url));
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/* remove non-directory element from path */
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$path = preg_replace('#/[^/]*$#', '', $path);
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/* destroy path if relative url points to root */
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if ($relativeLink[0] == '/') $path = '';
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/* dirty absolute URL */
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$abs = $host . $path . '/' . $relativeLink;
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/* replace '//' or '/./' or '/foo/../' with '/' */
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$re = array('#(/\.?/)#', '#/(?!\.\.)[^/]+/\.\./#');
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for($n=1; $n>0; $abs=preg_replace($re, '/', $abs, -1, $n)) {}
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/* absolute URL is ready! */
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return $scheme.'://'.$abs;
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}
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/**
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* Downloading pictures
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*
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* @return bool true if the download and processing is OK, false else
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*/
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private static function _downloadPictures($absolute_path, $fullpath)
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{
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$rawdata = Tools::getFile($absolute_path);
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$fullpath = urldecode($fullpath);
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if(file_exists($fullpath)) {
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unlink($fullpath);
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}
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// check extension
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$file_ext = strrchr($fullpath, '.');
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$whitelist = array(".jpg",".jpeg",".gif",".png");
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if (!(in_array($file_ext, $whitelist))) {
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Tools::logm('processed image with not allowed extension. Skipping ' . $fullpath);
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return false;
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}
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// check headers
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$imageinfo = getimagesize($absolute_path);
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if ($imageinfo['mime'] != 'image/gif' && $imageinfo['mime'] != 'image/jpeg'&& $imageinfo['mime'] != 'image/jpg'&& $imageinfo['mime'] != 'image/png') {
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Tools::logm('processed image with bad header. Skipping ' . $fullpath);
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return false;
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}
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// regenerate image
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$im = imagecreatefromstring($rawdata);
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if ($im === false) {
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Tools::logm('error while regenerating image ' . $fullpath);
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return false;
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}
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switch ($imageinfo['mime']) {
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case 'image/gif':
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$result = imagegif($im, $fullpath);
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break;
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case 'image/jpeg':
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case 'image/jpg':
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$result = imagejpeg($im, $fullpath, REGENERATE_PICTURES_QUALITY);
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break;
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case 'image/png':
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$result = imagepng($im, $fullpath, ceil(REGENERATE_PICTURES_QUALITY / 100 * 9));
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break;
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}
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imagedestroy($im);
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return $result;
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}
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/**
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* Create a directory for an article
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*
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* @param $id ID of the article
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* @return string
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*/
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private static function _createAssetsDirectory($id)
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{
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$assets_path = ABS_PATH;
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if (!is_dir($assets_path)) {
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mkdir($assets_path, 0715);
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}
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$article_directory = $assets_path . $id;
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if (!is_dir($article_directory)) {
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mkdir($article_directory, 0715);
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}
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return $article_directory;
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}
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/**
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* Remove the directory
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*
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* @param $directory
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* @return bool
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*/
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public static function removeDirectory($directory)
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{
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if (is_dir($directory)) {
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$files = array_diff(scandir($directory), array('.','..'));
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foreach ($files as $file) {
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(is_dir("$directory/$file")) ? self::removeDirectory("$directory/$file") : unlink("$directory/$file");
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}
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return rmdir($directory);
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}
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}
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} |