mod/parse_url.php

   1 <?php
   2 /* To-Do
   3 https://developers.google.com/+/plugins/snippet/
   4
   5 <meta itemprop="name" content="Toller Titel">
   6 <meta itemprop="description" content="Eine tolle Beschreibung">
   7 <meta itemprop="image" content="http://maple.libertreeproject.org/images/tree-icon.png">
   8
   9 <body itemscope itemtype="http://schema.org/Product">
  10   <h1 itemprop="name">Shiny Trinket</h1>
  11   <img itemprop="image" src="{image-url}" />
  12   <p itemprop="description">Shiny trinkets are shiny.</p>
  13 </body>
  14 */
  15
  16 if(!function_exists('deletenode')) {
  17         function deletenode(&$doc, $node)
  18         {
  19                 $xpath = new DomXPath($doc);
  20                 $list = $xpath->query("//".$node);
  21                 foreach ($list as $child)
  22                         $child->parentNode->removeChild($child);
  23         }
  24 }
  25
  26 function completeurl($url, $scheme) {
  27         $urlarr = parse_url($url);
  28
  29         if (isset($urlarr["scheme"]))
  30                 return($url);
  31
  32         $schemearr = parse_url($scheme);
  33
  34         $complete = $schemearr["scheme"]."://".$schemearr["host"];
  35
  36         if (@$schemearr["port"] != "")
  37                 $complete .= ":".$schemearr["port"];
  38
  39                 if(strpos($urlarr['path'],'/') !== 0)
  40                         $complete .= '/';
  41
  42         $complete .= $urlarr["path"];
  43
  44         if (@$urlarr["query"] != "")
  45                 $complete .= "?".$urlarr["query"];
  46
  47         if (@$urlarr["fragment"] != "")
  48                 $complete .= "#".$urlarr["fragment"];
  49
  50         return($complete);
  51 }
  52
  53 function parseurl_getsiteinfo($url, $no_guessing = false, $do_oembed = true, $count = 1) {
  54         require_once("include/network.php");
  55
  56         $a = get_app();
  57
  58         $siteinfo = array();
  59
  60         if ($count > 10) {
  61                 logger("parseurl_getsiteinfo: Endless loop detected for ".$url, LOGGER_DEBUG);
  62                 return($siteinfo);
  63         }
  64
  65         $url = trim($url, "'");
  66         $url = trim($url, '"');
  67
  68         $url = original_url($url);
  69
  70         $siteinfo["url"] = $url;
  71         $siteinfo["type"] = "link";
  72
  73         $ch = curl_init();
  74         curl_setopt($ch, CURLOPT_URL, $url);
  75         curl_setopt($ch, CURLOPT_HEADER, 1);
  76         curl_setopt($ch, CURLOPT_NOBODY, 1);
  77         curl_setopt($ch, CURLOPT_TIMEOUT, 3);
  78         curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
  79         //curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
  80         curl_setopt($ch, CURLOPT_USERAGENT, $a->get_useragent());
  81
  82         $header = curl_exec($ch);
  83         $curl_info = @curl_getinfo($ch);
  84         $http_code = $curl_info['http_code'];
  85         curl_close($ch);
  86
  87         if ((($curl_info['http_code'] == "301") OR ($curl_info['http_code'] == "302") OR ($curl_info['http_code'] == "303") OR ($curl_info['http_code'] == "307"))
  88                 AND (($curl_info['redirect_url'] != "") OR ($curl_info['location'] != ""))) {
  89                 if ($curl_info['redirect_url'] != "")
  90                         $siteinfo = parseurl_getsiteinfo($curl_info['redirect_url'], $no_guessing, $do_oembed, ++$count);
  91                 else
  92                         $siteinfo = parseurl_getsiteinfo($curl_info['location'], $no_guessing, $do_oembed, ++$count);
  93                 return($siteinfo);
  94         }
  95
  96         if ($do_oembed) {
  97                 require_once("include/oembed.php");
  98
  99                 $oembed_data = oembed_fetch_url($url);
 100
 101                 if ($oembed_data->type != "error")
 102                         $siteinfo["type"] = $oembed_data->type;
 103         }
 104
 105         // if the file is too large then exit
 106         if ($curl_info["download_content_length"] > 1000000)
 107                 return($siteinfo);
 108
 109         // if it isn't a HTML file then exit
 110         if (($curl_info["content_type"] != "") AND !strstr(strtolower($curl_info["content_type"]),"html"))
 111                 return($siteinfo);
 112
 113         // Now fetch the body as well
 114         $ch = curl_init();
 115         curl_setopt($ch, CURLOPT_URL, $url);
 116         curl_setopt($ch, CURLOPT_HEADER, 1);
 117         curl_setopt($ch, CURLOPT_NOBODY, 0);
 118         curl_setopt($ch, CURLOPT_TIMEOUT, 10);
 119         curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
 120         curl_setopt($ch, CURLOPT_USERAGENT, $a->get_useragent());
 121
 122         $header = curl_exec($ch);
 123         $curl_info = @curl_getinfo($ch);
 124         $http_code = $curl_info['http_code'];
 125         curl_close($ch);
 126
 127         // Fetch the first mentioned charset. Can be in body or header
 128         $charset = "";
 129         if (preg_match('/charset=(.*?)['."'".'"\s\n]/', $header, $matches))
 130                 $charset = trim(trim(trim(array_pop($matches)), ';,'));
 131
 132         if ($charset == "")
 133                 $charset = "utf-8";
 134
 135         $pos = strpos($header, "\r\n\r\n");
 136
 137         if ($pos)
 138                 $body = trim(substr($header, $pos));
 139         else
 140                 $body = $header;
 141
 142         if (($charset != '') AND (strtoupper($charset) != "UTF-8")) {
 143                 logger("parseurl_getsiteinfo: detected charset ".$charset, LOGGER_DEBUG);
 144                 //$body = mb_convert_encoding($body, "UTF-8", $charset);
 145                 $body = iconv($charset, "UTF-8//TRANSLIT", $body);
 146         }
 147
 148         $body = mb_convert_encoding($body, 'HTML-ENTITIES', "UTF-8");
 149
 150         $doc = new DOMDocument();
 151         @$doc->loadHTML($body);
 152
 153         deletenode($doc, 'style');
 154         deletenode($doc, 'script');
 155         deletenode($doc, 'option');
 156         deletenode($doc, 'h1');
 157         deletenode($doc, 'h2');
 158         deletenode($doc, 'h3');
 159         deletenode($doc, 'h4');
 160         deletenode($doc, 'h5');
 161         deletenode($doc, 'h6');
 162         deletenode($doc, 'ol');
 163         deletenode($doc, 'ul');
 164
 165         $xpath = new DomXPath($doc);
 166
 167         $list = $xpath->query("//meta[@content]");
 168         foreach ($list as $node) {
 169                 $attr = array();
 170                 if ($node->attributes->length)
 171                         foreach ($node->attributes as $attribute)
 172                                 $attr[$attribute->name] = $attribute->value;
 173
 174                 if (@$attr["http-equiv"] == 'refresh') {
 175                         $path = $attr["content"];
 176                         $pathinfo = explode(";", $path);
 177                         $content = "";
 178                         foreach ($pathinfo AS $value) {
 179                                 if (substr(strtolower($value), 0, 4) == "url=")
 180                                         $content = substr($value, 4);
 181                         }
 182                         if ($content != "") {
 183                                 $siteinfo = parseurl_getsiteinfo($content, $no_guessing, $do_oembed, ++$count);
 184                                 return($siteinfo);
 185                         }
 186                 }
 187         }
 188
 189         //$list = $xpath->query("head/title");
 190         $list = $xpath->query("//title");
 191         foreach ($list as $node)
 192                 $siteinfo["title"] =  html_entity_decode($node->nodeValue, ENT_QUOTES, "UTF-8");
 193
 194         //$list = $xpath->query("head/meta[@name]");
 195         $list = $xpath->query("//meta[@name]");
 196         foreach ($list as $node) {
 197                 $attr = array();
 198                 if ($node->attributes->length)
 199                         foreach ($node->attributes as $attribute)
 200                                 $attr[$attribute->name] = $attribute->value;
 201
 202                 $attr["content"] = trim(html_entity_decode($attr["content"], ENT_QUOTES, "UTF-8"));
 203
 204                 if ($attr["content"] != "")
 205                         switch (strtolower($attr["name"])) {
 206                                 case "fulltitle":
 207                                         $siteinfo["title"] = $attr["content"];
 208                                         break;
 209                                 case "description":
 210                                         $siteinfo["text"] = $attr["content"];
 211                                         break;
 212                                 case "thumbnail":
 213                                         $siteinfo["image"] = $attr["content"];
 214                                         break;
 215                                 case "twitter:image":
 216                                         $siteinfo["image"] = $attr["content"];
 217                                         break;
 218                                 case "twitter:image:src":
 219                                         $siteinfo["image"] = $attr["content"];
 220                                         break;
 221                                 case "twitter:card":
 222                                         if (($siteinfo["type"] == "") OR ($attr["content"] == "photo"))
 223                                                 $siteinfo["type"] = $attr["content"];
 224                                         break;
 225                                 case "twitter:description":
 226                                         $siteinfo["text"] = $attr["content"];
 227                                         break;
 228                                 case "twitter:title":
 229                                         $siteinfo["title"] = $attr["content"];
 230                                         break;
 231                                 case "dc.title":
 232                                         $siteinfo["title"] = $attr["content"];
 233                                         break;
 234                                 case "dc.description":
 235                                         $siteinfo["text"] = $attr["content"];
 236                                         break;
 237                                 case "keywords":
 238                                         $keywords = explode(",", $attr["content"]);
 239                                         break;
 240                                 case "news_keywords":
 241                                         $keywords = explode(",", $attr["content"]);
 242                                         break;
 243                         }
 244                 if ($siteinfo["type"] == "summary")
 245                         $siteinfo["type"] = "link";
 246         }
 247
 248         if (isset($keywords)) {
 249                 $siteinfo["keywords"] = array();
 250                 foreach ($keywords as $keyword)
 251                         $siteinfo["keywords"][] = trim($keyword);
 252         }
 253
 254         //$list = $xpath->query("head/meta[@property]");
 255         $list = $xpath->query("//meta[@property]");
 256         foreach ($list as $node) {
 257                 $attr = array();
 258                 if ($node->attributes->length)
 259                         foreach ($node->attributes as $attribute)
 260                                 $attr[$attribute->name] = $attribute->value;
 261
 262                 $attr["content"] = trim(html_entity_decode($attr["content"], ENT_QUOTES, "UTF-8"));
 263
 264                 if ($attr["content"] != "")
 265                         switch (strtolower($attr["property"])) {
 266                                 case "og:image":
 267                                         $siteinfo["image"] = $attr["content"];
 268                                         break;
 269                                 case "og:title":
 270                                         $siteinfo["title"] = $attr["content"];
 271                                         break;
 272                                 case "og:description":
 273                                         $siteinfo["text"] = $attr["content"];
 274                                         break;
 275                         }
 276         }
 277
 278         if (isset($oembed_data) AND ($oembed_data->type == "link") AND ($siteinfo["type"] != "photo")) {
 279                 if (isset($oembed_data->title) AND (trim($oembed_data->title) != ""))
 280                         $siteinfo["title"] = $oembed_data->title;
 281                 if (isset($oembed_data->description) AND (trim($oembed_data->description) != ""))
 282                         $siteinfo["text"] = trim($oembed_data->description);
 283                 if (isset($oembed_data->thumbnail_url) AND (trim($oembed_data->thumbnail_url) != ""))
 284                         $siteinfo["image"] = $oembed_data->thumbnail_url;
 285         }
 286
 287         if ((@$siteinfo["image"] == "") AND !$no_guessing) {
 288             $list = $xpath->query("//img[@src]");
 289             foreach ($list as $node) {
 290                 $attr = array();
 291                 if ($node->attributes->length)
 292                     foreach ($node->attributes as $attribute)
 293                         $attr[$attribute->name] = $attribute->value;
 294
 295                         $src = completeurl($attr["src"], $url);
 296                         $photodata = @getimagesize($src);
 297
 298                         if (($photodata) && ($photodata[0] > 150) and ($photodata[1] > 150)) {
 299                                 if ($photodata[0] > 300) {
 300                                         $photodata[1] = round($photodata[1] * (300 / $photodata[0]));
 301                                         $photodata[0] = 300;
 302                                 }
 303                                 if ($photodata[1] > 300) {
 304                                         $photodata[0] = round($photodata[0] * (300 / $photodata[1]));
 305                                         $photodata[1] = 300;
 306                                 }
 307                                 $siteinfo["images"][] = array("src"=>$src,
 308                                                                 "width"=>$photodata[0],
 309                                                                 "height"=>$photodata[1]);
 310                         }
 311
 312                 }
 313     } else {
 314                 $src = completeurl($siteinfo["image"], $url);
 315
 316                 unset($siteinfo["image"]);
 317
 318                 $photodata = @getimagesize($src);
 319
 320                 if (($photodata) && ($photodata[0] > 10) and ($photodata[1] > 10))
 321                         $siteinfo["images"][] = array("src"=>$src,
 322                                                         "width"=>$photodata[0],
 323                                                         "height"=>$photodata[1]);
 324         }
 325
 326         if ((@$siteinfo["text"] == "") AND (@$siteinfo["title"] != "") AND !$no_guessing) {
 327                 $text = "";
 328
 329                 $list = $xpath->query("//div[@class='article']");
 330                 foreach ($list as $node)
 331                         if (strlen($node->nodeValue) > 40)
 332                                 $text .= " ".trim($node->nodeValue);
 333
 334                 if ($text == "") {
 335                         $list = $xpath->query("//div[@class='content']");
 336                         foreach ($list as $node)
 337                                 if (strlen($node->nodeValue) > 40)
 338                                         $text .= " ".trim($node->nodeValue);
 339                 }
 340
 341                 // If none text was found then take the paragraph content
 342                 if ($text == "") {
 343                         $list = $xpath->query("//p");
 344                         foreach ($list as $node)
 345                                 if (strlen($node->nodeValue) > 40)
 346                                         $text .= " ".trim($node->nodeValue);
 347                 }
 348
 349                 if ($text != "") {
 350                         $text = trim(str_replace(array("\n", "\r"), array(" ", " "), $text));
 351
 352                         while (strpos($text, "  "))
 353                                 $text = trim(str_replace("  ", " ", $text));
 354
 355                         $siteinfo["text"] = trim(html_entity_decode(substr($text,0,350), ENT_QUOTES, "UTF-8").'...');
 356                 }
 357         }
 358
 359         logger("parseurl_getsiteinfo: Siteinfo for ".$url." ".print_r($siteinfo, true), LOGGER_DEBUG);
 360
 361         call_hooks('getsiteinfo', $siteinfo);
 362
 363         return($siteinfo);
 364 }
 365
 366 function arr_add_hashes(&$item,$k) {
 367         $item = '#' . $item;
 368 }
 369
 370 function parse_url_content(&$a) {
 371
 372         $text = null;
 373         $str_tags = '';
 374
 375         $textmode = false;
 376
 377         if(local_user() && (! feature_enabled(local_user(),'richtext')))
 378                 $textmode = true;
 379
 380         //if($textmode)
 381         $br = (($textmode) ? "\n" : '<br />');
 382
 383         if(x($_GET,'binurl'))
 384                 $url = trim(hex2bin($_GET['binurl']));
 385         else
 386                 $url = trim($_GET['url']);
 387
 388         if($_GET['title'])
 389                 $title = strip_tags(trim($_GET['title']));
 390
 391         if($_GET['description'])
 392                 $text = strip_tags(trim($_GET['description']));
 393
 394         if($_GET['tags']) {
 395                 $arr_tags = str_getcsv($_GET['tags']);
 396                 if(count($arr_tags)) {
 397                         array_walk($arr_tags,'arr_add_hashes');
 398                         $str_tags = $br . implode(' ',$arr_tags) . $br;
 399                 }
 400         }
 401
 402         logger('parse_url: ' . $url);
 403
 404         if($textmode)
 405                 $template = '[bookmark=%s]%s[/bookmark]%s';
 406         else
 407                 $template = "<a class=\"bookmark\" href=\"%s\" >%s</a>%s";
 408
 409         $arr = array('url' => $url, 'text' => '');
 410
 411         call_hooks('parse_link', $arr);
 412
 413         if(strlen($arr['text'])) {
 414                 echo $arr['text'];
 415                 killme();
 416         }
 417
 418
 419         if($url && $title && $text) {
 420
 421                 $title = str_replace(array("\r","\n"),array('',''),$title);
 422
 423                 if($textmode)
 424                         $text = '[quote]' . trim($text) . '[/quote]' . $br;
 425                 else {
 426                         $text = '<blockquote>' . htmlspecialchars(trim($text)) . '</blockquote><br />';
 427                         $title = htmlspecialchars($title);
 428                 }
 429
 430                 $result = sprintf($template,$url,($title) ? $title : $url,$text) . $str_tags;
 431
 432                 logger('parse_url (unparsed): returns: ' . $result);
 433
 434                 echo $result;
 435                 killme();
 436         }
 437
 438         $siteinfo = parseurl_getsiteinfo($url);
 439
 440 //      if ($textmode) {
 441 //              require_once("include/items.php");
 442 //
 443 //              echo add_page_info_data($siteinfo);
 444 //              killme();
 445 //      }
 446
 447         $url= $siteinfo["url"];
 448
 449         // If the link contains BBCode stuff, make a short link out of this to avoid parsing problems
 450         if (strpos($url, '[') OR strpos($url, ']')) {
 451                 require_once("include/network.php");
 452                 $url = short_link($url);
 453         }
 454
 455         $sitedata = "";
 456
 457         if($siteinfo["title"] == "") {
 458                 $sitedata .= sprintf($template,$url,$url,'') . $str_tags;
 459                 killme();
 460         } else {
 461                 $text = $siteinfo["text"];
 462                 $title = $siteinfo["title"];
 463         }
 464
 465         $image = "";
 466
 467         if (($siteinfo["type"] != "video") AND (sizeof($siteinfo["images"]) > 0)){
 468                 /* Execute below code only if image is present in siteinfo */
 469
 470                 $total_images = 0;
 471                 $max_images = get_config('system','max_bookmark_images');
 472                 if($max_images === false)
 473                         $max_images = 2;
 474                 else
 475                         $max_images = intval($max_images);
 476
 477                 foreach ($siteinfo["images"] as $imagedata) {
 478                         if($textmode)
 479                                 $image .= '[img='.$imagedata["width"].'x'.$imagedata["height"].']'.$imagedata["src"].'[/img]' . "\n";
 480                         else
 481                                 $image .= '<img height="'.$imagedata["height"].'" width="'.$imagedata["width"].'" src="'.$imagedata["src"].'" alt="photo" /><br />';
 482                         $total_images ++;
 483                         if($max_images && $max_images >= $total_images)
 484                                 break;
 485                 }
 486         }
 487
 488         if(strlen($text)) {
 489                 if($textmode)
 490                         $text = '[quote]'.trim($text).'[/quote]';
 491                 else
 492                         $text = '<blockquote>'.htmlspecialchars(trim($text)).'</blockquote>';
 493         }
 494
 495         if($image)
 496                 $text = $br.$br.$image.$text;
 497         else
 498                 $text = $br.$text;
 499
 500         $title = str_replace(array("\r","\n"),array('',''),$title);
 501
 502         $result = sprintf($template,$url,($title) ? $title : $url,$text) . $str_tags;
 503
 504         logger('parse_url: returns: ' . $result);
 505
 506         $sitedata .=  trim($result);
 507
 508         if (($siteinfo["type"] == "video") AND ($url != ""))
 509                 echo "[class=type-video]".$sitedata."[/class]";
 510         elseif (($siteinfo["type"] != "photo"))
 511                 echo "[class=type-link]".$sitedata."[/class]";
 512         else
 513                 echo "[class=type-photo]".$title.$br.$image."[/class]";
 514
 515         killme();
 516 }
 517 ?>