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     preg_match_all('#<\s*(img)[^>]+src="([^"]*)"[^>]*>#Si', $content, $matches, PREG_SET_ORDER);
  18     foreach($matches as $i => $link) {
  19         $link[1] = trim($link[1]);
  20         if (!preg_match('#^(([a-z]+://)|(\#))#', $link[1])) {
  21             $absolute_path = get_absolute_link($link[2],$url);
  22             $filename = basename(parse_url($absolute_path, PHP_URL_PATH));
  23             $directory = create_assets_directory($id);
  24             $fullpath = $directory . '/' . $filename;
  25             download_pictures($absolute_path, $fullpath);
  26             $content = str_replace($matches[$i][2], $fullpath, $content);
  27         }
  28
  29     }
  30
  31     return $content;
  32 }
  33
  34 /**
  35  * Retourne le lien absolu
  36  */
  37 function get_absolute_link($relative_link, $url) {
  38     /* return if already absolute URL */
  39     if (parse_url($relative_link, PHP_URL_SCHEME) != '') return $relative_link;
  40
  41     /* queries and anchors */
  42     if ($relative_link[0]=='#' || $relative_link[0]=='?') return $url . $relative_link;
  43
  44     /* parse base URL and convert to local variables:
  45        $scheme, $host, $path */
  46     extract(parse_url($url));
  47
  48     /* remove non-directory element from path */
  49     $path = preg_replace('#/[^/]*$#', '', $path);
  50
  51     /* destroy path if relative url points to root */
  52     if ($relative_link[0] == '/') $path = '';
  53
  54     /* dirty absolute URL */
  55     $abs = $host . $path . '/' . $relative_link;
  56
  57     /* replace '//' or '/./' or '/foo/../' with '/' */
  58     $re = array('#(/\.?/)#', '#/(?!\.\.)[^/]+/\.\./#');
  59     for($n=1; $n>0; $abs=preg_replace($re, '/', $abs, -1, $n)) {}
  60
  61     /* absolute URL is ready! */
  62     return $scheme.'://'.$abs;
  63 }
  64
  65 /**
  66  * Téléchargement des images
  67  */
  68 function download_pictures($absolute_path, $fullpath)
  69 {
  70     $rawdata = Tools::getFile($absolute_path);
  71     $fullpath = urldecode($fullpath);
  72
  73     if(file_exists($fullpath)) {
  74         unlink($fullpath);
  75     }
  76
  77     // check extension
  78     $file_ext = strrchr($fullpath, '.');
  79     $whitelist = array(".jpg",".jpeg",".gif",".png");
  80     if (!(in_array($file_ext, $whitelist))) {
  81         Tools::logm('processed image with not allowed extension. Skipping ' . $fullpath);
  82     } else {
  83         // check headers
  84         $imageinfo = getimagesize($absolute_path);
  85         if ($imageinfo['mime'] != 'image/gif' && $imageinfo['mime'] != 'image/jpeg'&& $imageinfo['mime'] != 'image/jpg'&& $imageinfo['mime'] != 'image/png') {
  86             Tools::logm('processed image with bad header. Skipping ' . $fullpath);
  87         } else {
  88             // regenerate image
  89             $im = imagecreatefromstring($rawdata);
  90             if ($im) {
  91                 switch ($imageinfo['mime']) {
  92                     case 'image/gif':
  93                         imagegif($im, $fullpath);
  94                         break;
  95                     case 'image/jpeg':
  96                     case 'image/jpg':
  97                         imagejpeg($im, $fullpath, REGENERATE_PICTURES_QUALITY);
  98                         break;
  99                     case 'image/png':
 100                         imagepng($im, $fullpath, ceil(REGENERATE_PICTURES_QUALITY / 100 * 9));
 101                         break;
 102                 }
 103                 imagedestroy($im);
 104             } else {
 105              Tools::logm('error while regenerating image ' . $fullpath);
 106             }
 107         }
 108     }
 109 }
 110
 111 /**
 112  * Crée un répertoire de médias pour l'article
 113  */
 114 function create_assets_directory($id)
 115 {
 116     $assets_path = ABS_PATH;
 117     if(!is_dir($assets_path)) {
 118         mkdir($assets_path, 0715);
 119     }
 120
 121     $article_directory = $assets_path . $id;
 122     if(!is_dir($article_directory)) {
 123         mkdir($article_directory, 0715);
 124     }
 125
 126     return $article_directory;
 127 }
 128
 129 /**
 130  * Suppression du répertoire d'images
 131  */
 132 function remove_directory($directory)
 133 {
 134     if(is_dir($directory)) {
 135         $files = array_diff(scandir($directory), array('.','..'));
 136         foreach ($files as $file) {
 137             (is_dir("$directory/$file")) ? remove_directory("$directory/$file") : unlink("$directory/$file");
 138         }
 139         return rmdir($directory);
 140     }
 141 }