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
  72     if(file_exists($fullpath)) {
  73         unlink($fullpath);
  74     }
  75
  76     // check extension
  77     $file_ext = strrchr($fullpath, '.');
  78     $whitelist = array(".jpg",".jpeg",".gif",".png");
  79     if (!(in_array($file_ext, $whitelist))) {
  80         Tools::logm('processed image with not allowed extension. Skipping ' . $fullpath);
  81     } else {
  82         // check headers
  83         $imageinfo = getimagesize($absolute_path);
  84         if ($imageinfo['mime'] != 'image/gif' && $imageinfo['mime'] != 'image/jpeg'&& $imageinfo['mime'] != 'image/jpg'&& $imageinfo['mime'] != 'image/png') {
  85             Tools::logm('processed image with bad header. Skipping ' . $fullpath);
  86         } else {
  87             // regenerate image
  88             $im = imagecreatefromstring($rawdata);
  89             if ($im) {
  90                 switch ($imageinfo['mime']) {
  91                     case 'image/gif':
  92                         imagegif($im, $fullpath);
  93                         break;
  94                     case 'image/jpeg':
  95                     case 'image/jpg':
  96                         imagejpeg($im, $fullpath); // default quality is 75%
  97                         break;
  98                     case 'image/png':
  99                         imagepng($im, $fullpath);
 100                         break;
 101                 }
 102                 imagedestroy($im);
 103             } else {
 104              Tools::logm('error while regenerating image ' . $fullpath);
 105             }
 106         }
 107     }
 108 }
 109
 110 /**
 111  * Crée un répertoire de médias pour l'article
 112  */
 113 function create_assets_directory($id)
 114 {
 115     $assets_path = ABS_PATH;
 116     if(!is_dir($assets_path)) {
 117         mkdir($assets_path, 0715);
 118     }
 119
 120     $article_directory = $assets_path . $id;
 121     if(!is_dir($article_directory)) {
 122         mkdir($article_directory, 0715);
 123     }
 124
 125     return $article_directory;
 126 }
 127
 128 /**
 129  * Suppression du répertoire d'images
 130  */
 131 function remove_directory($directory)
 132 {
 133     if(is_dir($directory)) {
 134         $files = array_diff(scandir($directory), array('.','..'));
 135         foreach ($files as $file) {
 136             (is_dir("$directory/$file")) ? remove_directory("$directory/$file") : unlink("$directory/$file");
 137         }
 138         return rmdir($directory);
 139     }
 140 }