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") {
  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             $parametres['content'] = filtre_picture($content, $url, $id);
 116             return $parametres;
 117         }
 118     }
 119
 120     logm('error during url preparation');
 121     return FALSE;
 122 }
 123
 124 /**
 125  * On modifie les URLS des images dans le corps de l'article
 126  */
 127 function filtre_picture($content, $url, $id)
 128 {
 129     $matches = array();
 130     preg_match_all('#<\s*(img)[^>]+src="([^"]*)"[^>]*>#Si', $content, $matches, PREG_SET_ORDER);
 131     foreach($matches as $i => $link)
 132     {
 133         $link[1] = trim($link[1]);
 134         if (!preg_match('#^(([a-z]+://)|(\#))#', $link[1]) )
 135         {
 136             $absolute_path = get_absolute_link($link[2],$url);
 137             $filename = basename(parse_url($absolute_path, PHP_URL_PATH));
 138             $directory = create_assets_directory($id);
 139             $fullpath = $directory . '/' . $filename;
 140             download_pictures($absolute_path, $fullpath);
 141             $content = str_replace($matches[$i][2], $fullpath, $content);
 142         }
 143
 144     }
 145
 146     return $content;
 147 }
 148
 149 /**
 150  * Retourne le lien absolu
 151  */
 152 function get_absolute_link($relative_link, $url)
 153 {
 154     /* return if already absolute URL */
 155     if (parse_url($relative_link, PHP_URL_SCHEME) != '') return $relative_link;
 156
 157     /* queries and anchors */
 158     if ($relative_link[0]=='#' || $relative_link[0]=='?') return $url . $relative_link;
 159
 160     /* parse base URL and convert to local variables:
 161        $scheme, $host, $path */
 162     extract(parse_url($url));
 163
 164     /* remove non-directory element from path */
 165     $path = preg_replace('#/[^/]*$#', '', $path);
 166
 167     /* destroy path if relative url points to root */
 168     if ($relative_link[0] == '/') $path = '';
 169
 170     /* dirty absolute URL */
 171     $abs = $host . $path . '/' . $relative_link;
 172
 173     /* replace '//' or '/./' or '/foo/../' with '/' */
 174     $re = array('#(/\.?/)#', '#/(?!\.\.)[^/]+/\.\./#');
 175     for($n=1; $n>0; $abs=preg_replace($re, '/', $abs, -1, $n)) {}
 176
 177     /* absolute URL is ready! */
 178     return $scheme.'://'.$abs;
 179 }
 180
 181 /**
 182  * Téléchargement des images
 183  */
 184
 185 function download_pictures($absolute_path, $fullpath)
 186 {
 187     $rawdata = get_external_file($absolute_path);
 188
 189     if(file_exists($fullpath)) {
 190         unlink($fullpath);
 191     }
 192     $fp = fopen($fullpath, 'x');
 193     fwrite($fp, $rawdata);
 194     fclose($fp);
 195 }
 196
 197 /**
 198  * Crée un répertoire de médias pour l'article
 199  */
 200 function create_assets_directory($id)
 201 {
 202     $assets_path = ABS_PATH;
 203     if(!is_dir($assets_path)) {
 204         mkdir($assets_path, 0705);
 205     }
 206
 207     $article_directory = $assets_path . $id;
 208     if(!is_dir($article_directory)) {
 209         mkdir($article_directory, 0705);
 210     }
 211
 212     return $article_directory;
 213 }
 214
 215 /**
 216  * Suppression du répertoire d'images
 217  */
 218 function remove_directory($directory)
 219 {
 220     if(is_dir($directory)) {
 221         $files = array_diff(scandir($directory), array('.','..'));
 222         foreach ($files as $file) {
 223             (is_dir("$directory/$file")) ? remove_directory("$directory/$file") : unlink("$directory/$file");
 224         }
 225         return rmdir($directory);
 226     }
 227 }
 228
 229 /**
 230  * Appel d'une action (mark as fav, archive, delete)
 231  */
 232
 233 function action_to_do($action, $id, $url, $token)
 234 {
 235     global $db;
 236
 237     switch ($action)
 238     {
 239         case 'add':
 240             if ($url == '')
 241                 continue;
 242
 243             $req = $db->getHandle()->query("SELECT id FROM entries ORDER BY id DESC");
 244             $id = $req->fetchColumn()+1;
 245
 246             if($parametres_url = prepare_url($url, $id)) {
 247                 $sql_action     = 'INSERT INTO entries ( id, url, title, content ) VALUES (?,?, ?, ?)';
 248                 $params_action  = array($id,$url, $parametres_url['title'], $parametres_url['content']);
 249             }
 250
 251             logm('add link ' . $url);
 252             break;
 253         case 'delete':
 254             if (verif_token($token)) {
 255                 remove_directory(ABS_PATH . $id);
 256                 $sql_action     = "DELETE FROM entries WHERE id=?";
 257                 $params_action  = array($id);
 258                 logm('delete link #' . $id);
 259             }
 260             else logm('csrf problem while deleting entry');
 261             break;
 262         case 'toggle_fav' :
 263             if (verif_token($token)) {
 264                 $sql_action     = "UPDATE entries SET is_fav=~is_fav WHERE id=?";
 265                 $params_action  = array($id);
 266                 logm('mark as favorite link #' . $id);
 267             }
 268             else logm('csrf problem while fav entry');
 269             break;
 270         case 'toggle_archive' :
 271             if (verif_token($token)) {
 272                 $sql_action     = "UPDATE entries SET is_read=~is_read WHERE id=?";
 273                 $params_action  = array($id);
 274                 logm('archive link #' . $id);
 275             }
 276             else logm('csrf problem while archive entry');
 277             break;
 278         default:
 279             break;
 280     }
 281
 282     try
 283     {
 284         # action query
 285         if (isset($sql_action))
 286         {
 287             $query = $db->getHandle()->prepare($sql_action);
 288             $query->execute($params_action);
 289         }
 290     }
 291     catch (Exception $e)
 292     {
 293         logm('action query error : '.$e->getMessage());
 294     }
 295 }
 296
 297 /**
 298  * Détermine quels liens afficher : home, fav ou archives
 299  */
 300 function display_view($view)
 301 {
 302     global $db;
 303
 304     switch ($_SESSION['sort'])
 305     {
 306         case 'ia':
 307             $order = 'ORDER BY id';
 308             break;
 309         case 'id':
 310             $order = 'ORDER BY id DESC';
 311             break;
 312         case 'ta':
 313             $order = 'ORDER BY lower(title)';
 314             break;
 315         case 'td':
 316             $order = 'ORDER BY lower(title) DESC';
 317             break;
 318         default:
 319             $order = 'ORDER BY id';
 320             break;
 321     }
 322
 323     switch ($view)
 324     {
 325         case 'archive':
 326             $sql    = "SELECT * FROM entries WHERE is_read=? " . $order;
 327             $params = array(-1);
 328             break;
 329         case 'fav' :
 330             $sql    = "SELECT * FROM entries WHERE is_fav=? " . $order;
 331             $params = array(-1);
 332             break;
 333         default:
 334             $sql    = "SELECT * FROM entries WHERE is_read=? " . $order;
 335             $params = array(0);
 336             break;
 337     }
 338
 339     # view query
 340     try
 341     {
 342         $query  = $db->getHandle()->prepare($sql);
 343         $query->execute($params);
 344         $entries = $query->fetchAll();
 345     }
 346     catch (Exception $e)
 347     {
 348         logm('view query error : '.$e->getMessage());
 349     }
 350
 351     return $entries;
 352 }
 353
 354 /**
 355  * Récupère un article en fonction d'un ID
 356  */
 357 function get_article($id)
 358 {
 359     global $db;
 360
 361     $entry  = NULL;
 362     $sql    = "SELECT * FROM entries WHERE id=?";
 363     $params = array(intval($id));
 364
 365     # view article query
 366     try
 367     {
 368         $query  = $db->getHandle()->prepare($sql);
 369         $query->execute($params);
 370         $entry = $query->fetchAll();
 371     }
 372     catch (Exception $e)
 373     {
 374         logm('get article query error : '.$e->getMessage());
 375     }
 376
 377     return $entry;
 378 }
 379
 380 /**
 381  * Vérifie si le jeton passé en $_POST correspond à celui en session
 382  */
 383 function verif_token($token)
 384 {
 385     if(isset($_SESSION['token_poche']) && isset($_SESSION['token_time_poche']) && isset($token))
 386     {
 387         if($_SESSION['token_poche'] == $token)
 388         {
 389             $old_timestamp = time() - (15*60);
 390             if($_SESSION['token_time_poche'] >= $old_timestamp)
 391             {
 392                 return TRUE;
 393             }
 394             else {
 395                 session_destroy();
 396                 logm('session expired');
 397             }
 398         }
 399         else {
 400             logm('token error : the token is different');
 401             return FALSE;
 402         }
 403     }
 404     else {
 405         logm('token error : the token is not here');
 406         return FALSE;
 407     }
 408 }
 409
 410 function logm($message)
 411 {
 412     $t = strval(date('Y/m/d_H:i:s')).' - '.$_SERVER["REMOTE_ADDR"].' - '.strval($message)."\n";
 413     file_put_contents('./log.txt',$t,FILE_APPEND);
 414 }