inc/functions.php

   1 <?php
   2
   3 /**
   4  * Permet de générer l'URL de poche pour le bookmarklet
   5  */
   6 function get_poche_url()
   7 {
   8     $protocol = "http";
   9     if(isset($_SERVER['HTTPS'])) {
  10         if($_SERVER['HTTPS'] != "off" && $_SERVER['HTTPS'] != "") {
  11             $protocol = "https";
  12         }
  13     }
  14
  15     return $protocol . "://" . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];
  16 }
  17
  18 // function define to retrieve url content
  19 function get_external_file($url)
  20 {
  21     $timeout = 15;
  22     // spoofing FireFox 18.0
  23     $useragent="Mozilla/5.0 (Windows NT 5.1; rv:18.0) Gecko/20100101 Firefox/18.0";
  24
  25     if  (in_array  ('curl', get_loaded_extensions())) {
  26         // Fetch feed from URL
  27         $curl = curl_init();
  28         curl_setopt($curl, CURLOPT_URL, $url);
  29         curl_setopt($curl, CURLOPT_TIMEOUT, $timeout);
  30         curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);
  31         curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
  32         curl_setopt($curl, CURLOPT_HEADER, false);
  33
  34         // FeedBurner requires a proper USER-AGENT...
  35         curl_setopt($curl, CURL_HTTP_VERSION_1_1, true);
  36         curl_setopt($curl, CURLOPT_ENCODING, "gzip, deflate");
  37         curl_setopt($curl, CURLOPT_USERAGENT, $useragent);
  38
  39         $data = curl_exec($curl);
  40
  41         $httpcode = curl_getinfo($curl, CURLINFO_HTTP_CODE);
  42
  43         $httpcodeOK = isset($httpcode) and ($httpcode == 200 or $httpcode == 301);
  44
  45         curl_close($curl);
  46     } else {
  47
  48         // create http context and add timeout and user-agent
  49         $context = stream_context_create(array('http'=>array('timeout' => $timeout,'header'=> "User-Agent: ".$useragent,/*spoot Mozilla Firefox*/'follow_location' => true)));
  50
  51         // only download page lesser than 4MB
  52         $data = @file_get_contents($url, false, $context, -1, 4000000); // We download at most 4 MB from source.
  53
  54         if(isset($http_response_header) and isset($http_response_header[0])) {
  55             $httpcodeOK = isset($http_response_header) and isset($http_response_header[0]) and ((strpos($http_response_header[0], '200 OK') !== FALSE) or (strpos($http_response_header[0], '301 Moved Permanently') !== FALSE));
  56         }
  57     }
  58
  59     // if response is not empty and response is OK
  60     if (isset($data) and isset($httpcodeOK) and $httpcodeOK ) {
  61
  62         // take charset of page and get it
  63         preg_match('#<meta .*charset=.*>#Usi', $data, $meta);
  64
  65         // if meta tag is found
  66         if (!empty($meta[0])) {
  67             // retrieve encoding in $enc
  68             preg_match('#charset="?(.*)"#si', $meta[0], $enc);
  69
  70             // if charset is found set it otherwise, set it to utf-8
  71             $html_charset = (!empty($enc[1])) ? strtolower($enc[1]) : 'utf-8';
  72
  73         } else {
  74             $html_charset = 'utf-8';
  75             $enc[1] = '';
  76         }
  77
  78         // replace charset of url to charset of page
  79         $data = str_replace('charset='.$enc[1], 'charset='.$html_charset, $data);
  80
  81         return $data;
  82     }
  83     else {
  84         return FALSE;
  85     }
  86 }
  87
  88 /**
  89  * Préparation de l'URL avec récupération du contenu avant insertion en base
  90  */
  91 function prepare_url($url, $id)
  92 {
  93     $parametres = array();
  94     $url    = html_entity_decode(trim($url));
  95
  96     // We remove the annoying parameters added by FeedBurner and GoogleFeedProxy (?utm_source=...)
  97     // from shaarli, by sebsauvage
  98     $i=strpos($url,'&utm_source='); if ($i!==false) $url=substr($url,0,$i);
  99     $i=strpos($url,'?utm_source='); if ($i!==false) $url=substr($url,0,$i);
 100     $i=strpos($url,'#xtor=RSS-'); if ($i!==false) $url=substr($url,0,$i);
 101
 102     $title  = $url;
 103     if (!preg_match('!^https?://!i', $url))
 104         $url = 'http://' . $url;
 105
 106     $html = Encoding::toUTF8(get_external_file($url,15));
 107     if (isset($html) and strlen($html) > 0)
 108     {
 109         $r = new Readability($html, $url);
 110         $r->convertLinksToFootnotes = TRUE;
 111         if($r->init())
 112         {
 113             $content = $r->articleContent->innerHTML;
 114             $parametres['title'] = $r->articleTitle->innerHTML;
 115             if (DOWNLOAD_PICTURES) {
 116                 $content = filtre_picture($content, $url, $id);
 117             }
 118             $parametres['content'] = $content;
 119             return $parametres;
 120         }
 121     }
 122
 123     logm('error during url preparation');
 124     return FALSE;
 125 }
 126
 127 /**
 128  * On modifie les URLS des images dans le corps de l'article
 129  */
 130 function filtre_picture($content, $url, $id)
 131 {
 132     $matches = array();
 133     preg_match_all('#<\s*(img)[^>]+src="([^"]*)"[^>]*>#Si', $content, $matches, PREG_SET_ORDER);
 134     foreach($matches as $i => $link)
 135     {
 136         $link[1] = trim($link[1]);
 137         if (!preg_match('#^(([a-z]+://)|(\#))#', $link[1]) )
 138         {
 139             $absolute_path = get_absolute_link($link[2],$url);
 140             $filename = basename(parse_url($absolute_path, PHP_URL_PATH));
 141             $directory = create_assets_directory($id);
 142             $fullpath = $directory . '/' . $filename;
 143             download_pictures($absolute_path, $fullpath);
 144             $content = str_replace($matches[$i][2], $fullpath, $content);
 145         }
 146
 147     }
 148
 149     return $content;
 150 }
 151
 152 /**
 153  * Retourne le lien absolu
 154  */
 155 function get_absolute_link($relative_link, $url)
 156 {
 157     /* return if already absolute URL */
 158     if (parse_url($relative_link, PHP_URL_SCHEME) != '') return $relative_link;
 159
 160     /* queries and anchors */
 161     if ($relative_link[0]=='#' || $relative_link[0]=='?') return $url . $relative_link;
 162
 163     /* parse base URL and convert to local variables:
 164        $scheme, $host, $path */
 165     extract(parse_url($url));
 166
 167     /* remove non-directory element from path */
 168     $path = preg_replace('#/[^/]*$#', '', $path);
 169
 170     /* destroy path if relative url points to root */
 171     if ($relative_link[0] == '/') $path = '';
 172
 173     /* dirty absolute URL */
 174     $abs = $host . $path . '/' . $relative_link;
 175
 176     /* replace '//' or '/./' or '/foo/../' with '/' */
 177     $re = array('#(/\.?/)#', '#/(?!\.\.)[^/]+/\.\./#');
 178     for($n=1; $n>0; $abs=preg_replace($re, '/', $abs, -1, $n)) {}
 179
 180     /* absolute URL is ready! */
 181     return $scheme.'://'.$abs;
 182 }
 183
 184 /**
 185  * Téléchargement des images
 186  */
 187
 188 function download_pictures($absolute_path, $fullpath)
 189 {
 190     $rawdata = get_external_file($absolute_path);
 191
 192     if(file_exists($fullpath)) {
 193         unlink($fullpath);
 194     }
 195     $fp = fopen($fullpath, 'x');
 196     fwrite($fp, $rawdata);
 197     fclose($fp);
 198 }
 199
 200 /**
 201  * Crée un répertoire de médias pour l'article
 202  */
 203 function create_assets_directory($id)
 204 {
 205     $assets_path = ABS_PATH;
 206     if(!is_dir($assets_path)) {
 207         mkdir($assets_path, 0705);
 208     }
 209
 210     $article_directory = $assets_path . $id;
 211     if(!is_dir($article_directory)) {
 212         mkdir($article_directory, 0705);
 213     }
 214
 215     return $article_directory;
 216 }
 217
 218 /**
 219  * Suppression du répertoire d'images
 220  */
 221 function remove_directory($directory)
 222 {
 223     if(is_dir($directory)) {
 224         $files = array_diff(scandir($directory), array('.','..'));
 225         foreach ($files as $file) {
 226             (is_dir("$directory/$file")) ? remove_directory("$directory/$file") : unlink("$directory/$file");
 227         }
 228         return rmdir($directory);
 229     }
 230 }
 231
 232 /**
 233  * Appel d'une action (mark as fav, archive, delete)
 234  */
 235
 236 function action_to_do($action, $id, $url, $token)
 237 {
 238     global $db;
 239
 240     switch ($action)
 241     {
 242         case 'add':
 243             if ($url == '')
 244                 continue;
 245
 246             # FIXME corriger cette génération d'ID
 247             $req = $db->getHandle()->query("SELECT id FROM entries ORDER BY id DESC");
 248             $id = $req->fetchColumn()+1;
 249
 250             if($parametres_url = prepare_url($url, $id)) {
 251                 $sql_action     = 'INSERT INTO entries ( id, url, title, content ) VALUES (?,?, ?, ?)';
 252                 $params_action  = array($id,$url, $parametres_url['title'], $parametres_url['content']);
 253             }
 254
 255             logm('add link ' . $url);
 256             break;
 257         case 'delete':
 258             if (verif_token($token)) {
 259                 remove_directory(ABS_PATH . $id);
 260                 $sql_action     = "DELETE FROM entries WHERE id=?";
 261                 $params_action  = array($id);
 262                 logm('delete link #' . $id);
 263             }
 264             else logm('csrf problem while deleting entry');
 265             break;
 266         case 'toggle_fav' :
 267             if (verif_token($token)) {
 268                 $sql_action     = "UPDATE entries SET is_fav=~is_fav WHERE id=?";
 269                 $params_action  = array($id);
 270                 logm('mark as favorite link #' . $id);
 271             }
 272             else logm('csrf problem while fav entry');
 273             break;
 274         case 'toggle_archive' :
 275             if (verif_token($token)) {
 276                 $sql_action     = "UPDATE entries SET is_read=~is_read WHERE id=?";
 277                 $params_action  = array($id);
 278                 logm('archive link #' . $id);
 279             }
 280             else logm('csrf problem while archive entry');
 281             break;
 282         default:
 283             break;
 284     }
 285
 286     try
 287     {
 288         # action query
 289         if (isset($sql_action))
 290         {
 291             $query = $db->getHandle()->prepare($sql_action);
 292             $query->execute($params_action);
 293         }
 294     }
 295     catch (Exception $e)
 296     {
 297         logm('action query error : '.$e->getMessage());
 298     }
 299 }
 300
 301 /**
 302  * Détermine quels liens afficher : home, fav ou archives
 303  */
 304 function display_view($view)
 305 {
 306     global $db;
 307
 308     switch ($_SESSION['sort'])
 309     {
 310         case 'ia':
 311             $order = 'ORDER BY id';
 312             break;
 313         case 'id':
 314             $order = 'ORDER BY id DESC';
 315             break;
 316         case 'ta':
 317             $order = 'ORDER BY lower(title)';
 318             break;
 319         case 'td':
 320             $order = 'ORDER BY lower(title) DESC';
 321             break;
 322         default:
 323             $order = 'ORDER BY id';
 324             break;
 325     }
 326
 327     switch ($view)
 328     {
 329         case 'archive':
 330             $sql    = "SELECT * FROM entries WHERE is_read=? " . $order;
 331             $params = array(-1);
 332             break;
 333         case 'fav' :
 334             $sql    = "SELECT * FROM entries WHERE is_fav=? " . $order;
 335             $params = array(-1);
 336             break;
 337         default:
 338             $sql    = "SELECT * FROM entries WHERE is_read=? " . $order;
 339             $params = array(0);
 340             break;
 341     }
 342
 343     # view query
 344     try
 345     {
 346         $query  = $db->getHandle()->prepare($sql);
 347         $query->execute($params);
 348         $entries = $query->fetchAll();
 349     }
 350     catch (Exception $e)
 351     {
 352         logm('view query error : '.$e->getMessage());
 353     }
 354
 355     return $entries;
 356 }
 357
 358 /**
 359  * Récupère un article en fonction d'un ID
 360  */
 361 function get_article($id)
 362 {
 363     global $db;
 364
 365     $entry  = NULL;
 366     $sql    = "SELECT * FROM entries WHERE id=?";
 367     $params = array(intval($id));
 368
 369     # view article query
 370     try
 371     {
 372         $query  = $db->getHandle()->prepare($sql);
 373         $query->execute($params);
 374         $entry = $query->fetchAll();
 375     }
 376     catch (Exception $e)
 377     {
 378         logm('get article query error : '.$e->getMessage());
 379     }
 380
 381     return $entry;
 382 }
 383
 384 /**
 385  * Vérifie si le jeton passé en $_POST correspond à celui en session
 386  */
 387 function verif_token($token)
 388 {
 389     if(isset($_SESSION['token_poche']) && isset($_SESSION['token_time_poche']) && isset($token))
 390     {
 391         if($_SESSION['token_poche'] == $token)
 392         {
 393             $old_timestamp = time() - (15*60);
 394             if($_SESSION['token_time_poche'] >= $old_timestamp)
 395             {
 396                 return TRUE;
 397             }
 398             else {
 399                 session_destroy();
 400                 logm('session expired');
 401             }
 402         }
 403         else {
 404             logm('token error : the token is different');
 405             return FALSE;
 406         }
 407     }
 408     else {
 409         logm('token error : the token is not here');
 410         return FALSE;
 411     }
 412 }
 413
 414 function logm($message)
 415 {
 416     $t = strval(date('Y/m/d_H:i:s')).' - '.$_SERVER["REMOTE_ADDR"].' - '.strval($message)."\n";
 417     file_put_contents('./log.txt',$t,FILE_APPEND);
 418 }