inc/poche/pochePictures.php

   1 <?php
   2 /**
   3  * wallabag, self hostable application allowing you to not miss any content anymore
   4  *
   5  * @category   wallabag
   6  * @author     Nicolas Lœuillet <nicolas@loeuillet.org>
   7  * @copyright  2013
   8  * @license    http://www.wtfpl.net/ see COPYING file
   9  */
  10
  11 /**
  12  * On modifie les URLS des images dans le corps de l'article
  13  */
  14 function filtre_picture($content, $url, $id)
  15 {
  16     $matches = array();
  17     $processing_pictures = array(); // list of processing image to avoid processing the same pictures twice
  18     preg_match_all('#<\s*(img)[^>]+src="([^"]*)"[^>]*>#Si', $content, $matches, PREG_SET_ORDER);
  19     foreach($matches as $i => $link) {
  20         $link[1] = trim($link[1]);
  21         if (!preg_match('#^(([a-z]+://)|(\#))#', $link[1])) {
  22             $absolute_path = get_absolute_link($link[2],$url);
  23             $filename = basename(parse_url($absolute_path, PHP_URL_PATH));
  24             $directory = create_assets_directory($id);
  25             $fullpath = $directory . '/' . $filename;
  26
  27             if (in_array($absolute_path, $processing_pictures) === true) {
  28                 // replace picture's URL only if processing is OK : already processing -> go to next picture
  29                 continue;
  30             }
  31
  32             if (download_pictures($absolute_path, $fullpath) === true) {
  33                 $content = str_replace($matches[$i][2], $fullpath, $content);
  34             }
  35
  36             $processing_pictures[] = $absolute_path;
  37         }
  38
  39     }
  40
  41     return $content;
  42 }
  43
  44 /**
  45  * Retourne le lien absolu
  46  */
  47 function get_absolute_link($relative_link, $url) {
  48     /* return if already absolute URL */
  49     if (parse_url($relative_link, PHP_URL_SCHEME) != '') return $relative_link;
  50
  51     /* queries and anchors */
  52     if ($relative_link[0]=='#' || $relative_link[0]=='?') return $url . $relative_link;
  53
  54     /* parse base URL and convert to local variables:
  55        $scheme, $host, $path */
  56     extract(parse_url($url));
  57
  58     /* remove non-directory element from path */
  59     $path = preg_replace('#/[^/]*$#', '', $path);
  60
  61     /* destroy path if relative url points to root */
  62     if ($relative_link[0] == '/') $path = '';
  63
  64     /* dirty absolute URL */
  65     $abs = $host . $path . '/' . $relative_link;
  66
  67     /* replace '//' or '/./' or '/foo/../' with '/' */
  68     $re = array('#(/\.?/)#', '#/(?!\.\.)[^/]+/\.\./#');
  69     for($n=1; $n>0; $abs=preg_replace($re, '/', $abs, -1, $n)) {}
  70
  71     /* absolute URL is ready! */
  72     return $scheme.'://'.$abs;
  73 }
  74
  75 /**
  76  * Téléchargement des images
  77  *
  78  * @return bool true if the download and processing is OK, false else
  79  */
  80 function download_pictures($absolute_path, $fullpath)
  81 {
  82     $rawdata = Tools::getFile($absolute_path);
  83     $fullpath = urldecode($fullpath);
  84
  85     if(file_exists($fullpath)) {
  86         unlink($fullpath);
  87     }
  88
  89     // check extension
  90     $file_ext = strrchr($fullpath, '.');
  91     $whitelist = array(".jpg",".jpeg",".gif",".png");
  92     if (!(in_array($file_ext, $whitelist))) {
  93         Tools::logm('processed image with not allowed extension. Skipping ' . $fullpath);
  94         return false;
  95     }
  96
  97     // check headers
  98     $imageinfo = getimagesize($absolute_path);
  99     if ($imageinfo['mime'] != 'image/gif' && $imageinfo['mime'] != 'image/jpeg'&& $imageinfo['mime'] != 'image/jpg'&& $imageinfo['mime'] != 'image/png') {
 100         Tools::logm('processed image with bad header. Skipping ' . $fullpath);
 101         return false;
 102     }
 103
 104     // regenerate image
 105     $im = imagecreatefromstring($rawdata);
 106     if ($im === false) {
 107         Tools::logm('error while regenerating image ' . $fullpath);
 108         return false;
 109     }
 110
 111     switch ($imageinfo['mime']) {
 112         case 'image/gif':
 113             $result = imagegif($im, $fullpath);
 114             break;
 115         case 'image/jpeg':
 116         case 'image/jpg':
 117             $result = imagejpeg($im, $fullpath, REGENERATE_PICTURES_QUALITY);
 118             break;
 119         case 'image/png':
 120             $result = imagepng($im, $fullpath, ceil(REGENERATE_PICTURES_QUALITY / 100 * 9));
 121             break;
 122     }
 123     imagedestroy($im);
 124
 125     return $result;
 126 }
 127
 128 /**
 129  * Crée un répertoire de médias pour l'article
 130  */
 131 function create_assets_directory($id)
 132 {
 133     $assets_path = ABS_PATH;
 134     if(!is_dir($assets_path)) {
 135         mkdir($assets_path, 0715);
 136     }
 137
 138     $article_directory = $assets_path . $id;
 139     if(!is_dir($article_directory)) {
 140         mkdir($article_directory, 0715);
 141     }
 142
 143     return $article_directory;
 144 }
 145
 146 /**
 147  * Suppression du répertoire d'images
 148  */
 149 function remove_directory($directory)
 150 {
 151     if(is_dir($directory)) {
 152         $files = array_diff(scandir($directory), array('.','..'));
 153         foreach ($files as $file) {
 154             (is_dir("$directory/$file")) ? remove_directory("$directory/$file") : unlink("$directory/$file");
 155         }
 156         return rmdir($directory);
 157     }
 158 }