inc/3rdparty/content-extractor/ContentExtractor.php

   1 <?php
   2 /**
   3  * Content Extractor
   4  *
   5  * Uses patterns specified in site config files and auto detection (hNews/PHP Readability)
   6  * to extract content from HTML files.
   7  *
   8  * @version 0.8
   9  * @date 2012-02-21
  10  * @author Keyvan Minoukadeh
  11  * @copyright 2011 Keyvan Minoukadeh
  12  * @license http://www.gnu.org/licenses/agpl-3.0.html AGPL v3
  13  */
  14
  15 class ContentExtractor
  16 {
  17         protected static $tidy_config = array(
  18                                  'clean' => true,
  19                                  'output-xhtml' => true,
  20                                  'logical-emphasis' => true,
  21                                  'show-body-only' => false,
  22                                  'new-blocklevel-tags' => 'article, aside, footer, header, hgroup, menu, nav, section, details, datagrid',
  23                                  'new-inline-tags' => 'mark, time, meter, progress, data',
  24                                  'wrap' => 0,
  25                                  'drop-empty-paras' => true,
  26                                  'drop-proprietary-attributes' => false,
  27                                  'enclose-text' => true,
  28                                  'enclose-block-text' => true,
  29                                  'merge-divs' => true,
  30                                  'merge-spans' => true,
  31                                  'char-encoding' => 'utf8',
  32                                  'hide-comments' => true
  33                                  );
  34         protected $html;
  35         protected $config;
  36         protected $title;
  37         protected $author = array();
  38         protected $language;
  39         protected $date;
  40         protected $body;
  41         protected $success = false;
  42         public $fingerprints = array();
  43         public $readability;
  44         public $debug = false;
  45
  46         function __construct($path, $fallback=null) {
  47                 SiteConfig::set_config_path($path, $fallback);
  48         }
  49
  50         protected function debug($msg) {
  51                 if ($this->debug) {
  52                         $mem = round(memory_get_usage()/1024, 2);
  53                         $memPeak = round(memory_get_peak_usage()/1024, 2);
  54                         echo '* ',$msg;
  55                         echo ' - mem used: ',$mem," (peak: $memPeak)\n";
  56                         ob_flush();
  57                         flush();
  58                 }
  59         }
  60
  61         public function reset() {
  62                 $this->html = null;
  63                 $this->readability = null;
  64                 $this->config = null;
  65                 $this->title = null;
  66                 $this->body = null;
  67                 $this->author = array();
  68                 $this->language = null;
  69                 $this->date = null;
  70                 $this->success = false;
  71         }
  72
  73         public function findHostUsingFingerprints($html) {
  74                 $this->debug('Checking fingerprints...');
  75                 $head = substr($html, 0, 8000);
  76                 foreach ($this->fingerprints as $_fp => $_fphost) {
  77                         $lookin = 'html';
  78                         if (is_array($_fphost)) {
  79                                 if (isset($_fphost['head']) && $_fphost['head']) {
  80                                         $lookin = 'head';
  81                                 }
  82                                 $_fphost = $_fphost['hostname'];
  83                         }
  84                         if (strpos($$lookin, $_fp) !== false) {
  85                                 $this->debug("Found match: $_fphost");
  86                                 return $_fphost;
  87                         }
  88                 }
  89                 return false;
  90         }
  91
  92         // returns true on success, false on failure
  93         // $smart_tidy indicates that if tidy is used and no results are produced, we will
  94         // try again without it. Tidy helps us deal with PHP's patchy HTML parsing most of the time
  95         // but it has problems of its own which we try to avoid with this option.
  96         public function process($html, $url, $smart_tidy=true) {
  97                 $this->reset();
  98                 // extract host name
  99                 $host = @parse_url($url, PHP_URL_HOST);
 100                 if (!($this->config = SiteConfig::build($host))) {
 101                         // no match, check HTML for fingerprints
 102                         if (!empty($this->fingerprints) && ($_fphost = $this->findHostUsingFingerprints($html))) {
 103                                 $this->config = SiteConfig::build($_fphost);
 104                         }
 105                         unset($_fphost);
 106                         if (!$this->config) {
 107                                 // no match, so use defaults
 108                                 $this->config = new SiteConfig();
 109                         }
 110                 }
 111                 // store copy of config in our static cache array in case we need to process another URL
 112                 SiteConfig::add_to_cache($host, $this->config);
 113
 114                 // do string replacements
 115                 foreach ($this->config->replace_string as $_repl) {
 116                         $html = str_replace($_repl[0], $_repl[1], $html);
 117                 }
 118                 unset($_repl);
 119
 120                 // use tidy (if it exists)?
 121                 // This fixes problems with some sites which would otherwise
 122                 // trouble DOMDocument's HTML parsing. (Although sometimes it
 123                 // makes matters worse, which is why you can override it in site config files.)
 124                 $tidied = false;
 125                 if ($this->config->tidy && function_exists('tidy_parse_string') && $smart_tidy) {
 126                         $this->debug('Using Tidy');
 127                         $tidy = tidy_parse_string($html, self::$tidy_config, 'UTF8');
 128                         if (tidy_clean_repair($tidy)) {
 129                                 $original_html = $html;
 130                                 $tidied = true;
 131                                 // $html = $tidy->value;
 132                         }
 133                         $body = $tidy->body();
 134                         if (preg_replace('/\s+/', '', $body->value) !== "<body></body>") {
 135                                 $html = $tidy->value;
 136                         }
 137                         unset($tidy);
 138                 }
 139
 140                 // load and parse html
 141                 $this->readability = new Readability($html, $url);
 142
 143                 // we use xpath to find elements in the given HTML document
 144                 // see http://en.wikipedia.org/wiki/XPath_1.0
 145                 $xpath = new DOMXPath($this->readability->dom);
 146
 147                 // try to get title
 148                 foreach ($this->config->title as $pattern) {
 149                         $elems = @$xpath->evaluate($pattern, $this->readability->dom);
 150                         if (is_string($elems)) {
 151                                 $this->debug('Title expression evaluated as string');
 152                                 $this->title = trim($elems);
 153                                 break;
 154                         } elseif ($elems instanceof DOMNodeList && $elems->length > 0) {
 155                                 $this->debug('Title matched');
 156                                 $this->title = $elems->item(0)->textContent;
 157                                 // remove title from document
 158                                 try {
 159                                         $elems->item(0)->parentNode->removeChild($elems->item(0));
 160                                 } catch (DOMException $e) {
 161                                         // do nothing
 162                                 }
 163                                 break;
 164                         }
 165                 }
 166
 167                 // try to get author (if it hasn't already been set)
 168                 if (empty($this->author)) {
 169                         foreach ($this->config->author as $pattern) {
 170                                 $elems = @$xpath->evaluate($pattern, $this->readability->dom);
 171                                 if (is_string($elems)) {
 172                                         $this->debug('Author expression evaluated as string');
 173                                         if (trim($elems) != '') {
 174                                                 $this->author[] = trim($elems);
 175                                                 break;
 176                                         }
 177                                 } elseif ($elems instanceof DOMNodeList && $elems->length > 0) {
 178                                         foreach ($elems as $elem) {
 179                                                 if (!isset($elem->parentNode)) continue;
 180                                                 $this->author[] = trim($elem->textContent);
 181                                         }
 182                                         if (!empty($this->author)) break;
 183                                 }
 184                         }
 185                 }
 186
 187                 // try to get language
 188                 $_lang_xpath = array('//html[@lang]/@lang', '//meta[@name="DC.language"]/@content');
 189                 foreach ($_lang_xpath as $pattern) {
 190                         $elems = @$xpath->evaluate($pattern, $this->readability->dom);
 191                         if (is_string($elems)) {
 192                                 if (trim($elems) != '') {
 193                                         $this->language = trim($elems);
 194                                         break;
 195                                 }
 196                         } elseif ($elems instanceof DOMNodeList && $elems->length > 0) {
 197                                 foreach ($elems as $elem) {
 198                                         if (!isset($elem->parentNode)) continue;
 199                                         $this->language = trim($elem->textContent);
 200                                 }
 201                                 if ($this->language) break;
 202                         }
 203                 }
 204
 205                 // try to get date
 206                 foreach ($this->config->date as $pattern) {
 207                         $elems = @$xpath->evaluate($pattern, $this->readability->dom);
 208                         if (is_string($elems)) {
 209                                 $this->debug('Date expression evaluated as string');
 210                                 $this->date = strtotime(trim($elems, "; \t\n\r\0\x0B"));
 211                         } elseif ($elems instanceof DOMNodeList && $elems->length > 0) {
 212                                 $this->debug('Date matched');
 213                                 $this->date = $elems->item(0)->textContent;
 214                                 $this->date = strtotime(trim($this->date, "; \t\n\r\0\x0B"));
 215                                 // remove date from document
 216                                 // $elems->item(0)->parentNode->removeChild($elems->item(0));
 217                         }
 218                         if (!$this->date) {
 219                                 $this->date = null;
 220                         } else {
 221                                 break;
 222                         }
 223                 }
 224
 225                 // strip elements (using xpath expressions)
 226                 foreach ($this->config->strip as $pattern) {
 227                         $elems = @$xpath->query($pattern, $this->readability->dom);
 228                         // check for matches
 229                         if ($elems && $elems->length > 0) {
 230                                 $this->debug('Stripping '.$elems->length.' elements (strip)');
 231                                 for ($i=$elems->length-1; $i >= 0; $i--) {
 232                                         $elems->item($i)->parentNode->removeChild($elems->item($i));
 233                                 }
 234                         }
 235                 }
 236
 237                 // strip elements (using id and class attribute values)
 238                 foreach ($this->config->strip_id_or_class as $string) {
 239                         $string = strtr($string, array("'"=>'', '"'=>''));
 240                         $elems = @$xpath->query("//*[contains(@class, '$string') or contains(@id, '$string')]", $this->readability->dom);
 241                         // check for matches
 242                         if ($elems && $elems->length > 0) {
 243                                 $this->debug('Stripping '.$elems->length.' elements (strip_id_or_class)');
 244                                 for ($i=$elems->length-1; $i >= 0; $i--) {
 245                                         $elems->item($i)->parentNode->removeChild($elems->item($i));
 246                                 }
 247                         }
 248                 }
 249
 250                 // strip images (using src attribute values)
 251                 foreach ($this->config->strip_image_src as $string) {
 252                         $string = strtr($string, array("'"=>'', '"'=>''));
 253                         $elems = @$xpath->query("//img[contains(@src, '$string')]", $this->readability->dom);
 254                         // check for matches
 255                         if ($elems && $elems->length > 0) {
 256                                 $this->debug('Stripping '.$elems->length.' image elements');
 257                                 for ($i=$elems->length-1; $i >= 0; $i--) {
 258                                         $elems->item($i)->parentNode->removeChild($elems->item($i));
 259                                 }
 260                         }
 261                 }
 262                 // strip elements using Readability.com and Instapaper.com ignore class names
 263                 // .entry-unrelated and .instapaper_ignore
 264                 // See https://www.readability.com/publishers/guidelines/#view-plainGuidelines
 265                 // and http://blog.instapaper.com/post/730281947
 266                 $elems = @$xpath->query("//*[contains(concat(' ',normalize-space(@class),' '),' entry-unrelated ') or contains(concat(' ',normalize-space(@class),' '),' instapaper_ignore ')]", $this->readability->dom);
 267                 // check for matches
 268                 if ($elems && $elems->length > 0) {
 269                         $this->debug('Stripping '.$elems->length.' .entry-unrelated,.instapaper_ignore elements');
 270                         for ($i=$elems->length-1; $i >= 0; $i--) {
 271                                 $elems->item($i)->parentNode->removeChild($elems->item($i));
 272                         }
 273                 }
 274
 275                 // strip elements that contain style="display: none;"
 276                 $elems = @$xpath->query("//*[contains(@style,'display:none')]", $this->readability->dom);
 277                 // check for matches
 278                 if ($elems && $elems->length > 0) {
 279                         $this->debug('Stripping '.$elems->length.' elements with inline display:none style');
 280                         for ($i=$elems->length-1; $i >= 0; $i--) {
 281                                 $elems->item($i)->parentNode->removeChild($elems->item($i));
 282                         }
 283                 }
 284
 285                 // try to get body
 286                 foreach ($this->config->body as $pattern) {
 287                         $elems = @$xpath->query($pattern, $this->readability->dom);
 288                         // check for matches
 289                         if ($elems && $elems->length > 0) {
 290                                 $this->debug('Body matched');
 291                                 if ($elems->length == 1) {
 292                                         $this->body = $elems->item(0);
 293                                         // prune (clean up elements that may not be content)
 294                                         if ($this->config->prune) {
 295                                                 $this->debug('Pruning content');
 296                                                 $this->readability->prepArticle($this->body);
 297                                         }
 298                                         break;
 299                                 } else {
 300                                         $this->body = $this->readability->dom->createElement('div');
 301                                         $this->debug($elems->length.' body elems found');
 302                                         foreach ($elems as $elem) {
 303                                                 if (!isset($elem->parentNode)) continue;
 304                                                 $isDescendant = false;
 305                                                 foreach ($this->body->childNodes as $parent) {
 306                                                         if ($this->isDescendant($parent, $elem)) {
 307                                                                 $isDescendant = true;
 308                                                                 break;
 309                                                         }
 310                                                 }
 311                                                 if ($isDescendant) {
 312                                                         $this->debug('Element is child of another body element, skipping.');
 313                                                 } else {
 314                                                         // prune (clean up elements that may not be content)
 315                                                         if ($this->config->prune) {
 316                                                                 $this->debug('Pruning content');
 317                                                                 $this->readability->prepArticle($elem);
 318                                                         }
 319                                                         $this->debug('Element added to body');
 320                                                         $this->body->appendChild($elem);
 321                                                 }
 322                                         }
 323                                 }
 324                         }
 325                 }
 326
 327                 // auto detect?
 328                 $detect_title = $detect_body = $detect_author = $detect_date = false;
 329                 // detect title?
 330                 if (!isset($this->title)) {
 331                         if (empty($this->config->title) || $this->config->autodetect_on_failure) {
 332                                 $detect_title = true;
 333                         }
 334                 }
 335                 // detect body?
 336                 if (!isset($this->body)) {
 337                         if (empty($this->config->body) || $this->config->autodetect_on_failure) {
 338                                 $detect_body = true;
 339                         }
 340                 }
 341                 // detect author?
 342                 if (empty($this->author)) {
 343                         if (empty($this->config->author) || $this->config->autodetect_on_failure) {
 344                                 $detect_author = true;
 345                         }
 346                 }
 347                 // detect date?
 348                 if (!isset($this->date)) {
 349                         if (empty($this->config->date) || $this->config->autodetect_on_failure) {
 350                                 $detect_date = true;
 351                         }
 352                 }
 353
 354                 // check for hNews
 355                 if ($detect_title || $detect_body) {
 356                         // check for hentry
 357                         $elems = @$xpath->query("//*[contains(concat(' ',normalize-space(@class),' '),' hentry ')]", $this->readability->dom);
 358                         if ($elems && $elems->length > 0) {
 359                                 $this->debug('hNews: found hentry');
 360                                 $hentry = $elems->item(0);
 361
 362                                 if ($detect_title) {
 363                                         // check for entry-title
 364                                         $elems = @$xpath->query(".//*[contains(concat(' ',normalize-space(@class),' '),' entry-title ')]", $hentry);
 365                                         if ($elems && $elems->length > 0) {
 366                                                 $this->debug('hNews: found entry-title');
 367                                                 $this->title = $elems->item(0)->textContent;
 368                                                 // remove title from document
 369                                                 $elems->item(0)->parentNode->removeChild($elems->item(0));
 370                                                 $detect_title = false;
 371                                         }
 372                                 }
 373
 374                                 if ($detect_date) {
 375                                         // check for time element with pubdate attribute
 376                                         $elems = @$xpath->query(".//time[@pubdate] | .//abbr[contains(concat(' ',normalize-space(@class),' '),' published ')]", $hentry);
 377                                         if ($elems && $elems->length > 0) {
 378                                                 $this->debug('hNews: found publication date');
 379                                                 $this->date = strtotime(trim($elems->item(0)->textContent));
 380                                                 // remove date from document
 381                                                 //$elems->item(0)->parentNode->removeChild($elems->item(0));
 382                                                 if ($this->date) {
 383                                                         $detect_date = false;
 384                                                 } else {
 385                                                         $this->date = null;
 386                                                 }
 387                                         }
 388                                 }
 389
 390                                 if ($detect_author) {
 391                                         // check for time element with pubdate attribute
 392                                         $elems = @$xpath->query(".//*[contains(concat(' ',normalize-space(@class),' '),' vcard ') and (contains(concat(' ',normalize-space(@class),' '),' author ') or contains(concat(' ',normalize-space(@class),' '),' byline '))]", $hentry);
 393                                         if ($elems && $elems->length > 0) {
 394                                                 $this->debug('hNews: found author');
 395                                                 $author = $elems->item(0);
 396                                                 $fn = @$xpath->query(".//*[contains(concat(' ',normalize-space(@class),' '),' fn ')]", $author);
 397                                                 if ($fn && $fn->length > 0) {
 398                                                         foreach ($fn as $_fn) {
 399                                                                 if (trim($_fn->textContent) != '') {
 400                                                                         $this->author[] = trim($_fn->textContent);
 401                                                                 }
 402                                                         }
 403                                                 } else {
 404                                                         if (trim($author->textContent) != '') {
 405                                                                 $this->author[] = trim($author->textContent);
 406                                                         }
 407                                                 }
 408                                                 $detect_author = empty($this->author);
 409                                         }
 410                                 }
 411
 412                                 // check for entry-content.
 413                                 // according to hAtom spec, if there are multiple elements marked entry-content,
 414                                 // we include all of these in the order they appear - see http://microformats.org/wiki/hatom#Entry_Content
 415                                 if ($detect_body) {
 416                                         $elems = @$xpath->query(".//*[contains(concat(' ',normalize-space(@class),' '),' entry-content ')]", $hentry);
 417                                         if ($elems && $elems->length > 0) {
 418                                                 $this->debug('hNews: found entry-content');
 419                                                 if ($elems->length == 1) {
 420                                                         // what if it's empty? (some sites misuse hNews - place their content outside an empty entry-content element)
 421                                                         $e = $elems->item(0);
 422                                                         if (($e->tagName == 'img') || (trim($e->textContent) != '')) {
 423                                                                 $this->body = $elems->item(0);
 424                                                                 // prune (clean up elements that may not be content)
 425                                                                 if ($this->config->prune) {
 426                                                                         $this->debug('Pruning content');
 427                                                                         $this->readability->prepArticle($this->body);
 428                                                                 }
 429                                                                 $detect_body = false;
 430                                                         } else {
 431                                                                 $this->debug('hNews: skipping entry-content - appears not to contain content');
 432                                                         }
 433                                                         unset($e);
 434                                                 } else {
 435                                                         $this->body = $this->readability->dom->createElement('div');
 436                                                         $this->debug($elems->length.' entry-content elems found');
 437                                                         foreach ($elems as $elem) {
 438                                                                 if (!isset($elem->parentNode)) continue;
 439                                                                 $isDescendant = false;
 440                                                                 foreach ($this->body->childNodes as $parent) {
 441                                                                         if ($this->isDescendant($parent, $elem)) {
 442                                                                                 $isDescendant = true;
 443                                                                                 break;
 444                                                                         }
 445                                                                 }
 446                                                                 if ($isDescendant) {
 447                                                                         $this->debug('Element is child of another body element, skipping.');
 448                                                                 } else {
 449                                                                         // prune (clean up elements that may not be content)
 450                                                                         if ($this->config->prune) {
 451                                                                                 $this->debug('Pruning content');
 452                                                                                 $this->readability->prepArticle($elem);
 453                                                                         }
 454                                                                         $this->debug('Element added to body');
 455                                                                         $this->body->appendChild($elem);
 456                                                                 }
 457                                                         }
 458                                                         $detect_body = false;
 459                                                 }
 460                                         }
 461                                 }
 462                         }
 463                 }
 464
 465                 // check for elements marked with instapaper_title
 466                 if ($detect_title) {
 467                         // check for instapaper_title
 468                         $elems = @$xpath->query("//*[contains(concat(' ',normalize-space(@class),' '),' instapaper_title ')]", $this->readability->dom);
 469                         if ($elems && $elems->length > 0) {
 470                                 $this->debug('title found (.instapaper_title)');
 471                                 $this->title = $elems->item(0)->textContent;
 472                                 // remove title from document
 473                                 $elems->item(0)->parentNode->removeChild($elems->item(0));
 474                                 $detect_title = false;
 475                         }
 476                 }
 477                 // check for elements marked with instapaper_body
 478                 if ($detect_body) {
 479                         $elems = @$xpath->query("//*[contains(concat(' ',normalize-space(@class),' '),' instapaper_body ')]", $this->readability->dom);
 480                         if ($elems && $elems->length > 0) {
 481                                 $this->debug('body found (.instapaper_body)');
 482                                 $this->body = $elems->item(0);
 483                                 // prune (clean up elements that may not be content)
 484                                 if ($this->config->prune) {
 485                                         $this->debug('Pruning content');
 486                                         $this->readability->prepArticle($this->body);
 487                                 }
 488                                 $detect_body = false;
 489                         }
 490                 }
 491
 492                 // Find author in rel="author" marked element
 493                 // We only use this if there's exactly one.
 494                 // If there's more than one, it could indicate more than
 495                 // one author, but it could also indicate that we're processing
 496                 // a page listing different articles with different authors.
 497                 if ($detect_author) {
 498                         $elems = @$xpath->query("//a[contains(concat(' ',normalize-space(@rel),' '),' author ')]", $this->readability->dom);
 499                         if ($elems && $elems->length == 1) {
 500                                 $this->debug('Author found (rel="author")');
 501                                 $author = trim($elems->item(0)->textContent);
 502                                 if ($author != '') {
 503                                         $this->author[] = $author;
 504                                         $detect_author = false;
 505                                 }
 506                         }
 507                 }
 508
 509                 // Find date in pubdate marked time element
 510                 // For the same reason given above, we only use this
 511                 // if there's exactly one element.
 512                 if ($detect_date) {
 513                         $elems = @$xpath->query("//time[@pubdate]", $this->readability->dom);
 514                         if ($elems && $elems->length == 1) {
 515                                 $this->debug('Date found (pubdate marked time element)');
 516                                 $this->date = strtotime(trim($elems->item(0)->textContent));
 517                                 // remove date from document
 518                                 //$elems->item(0)->parentNode->removeChild($elems->item(0));
 519                                 if ($this->date) {
 520                                         $detect_date = false;
 521                                 } else {
 522                                         $this->date = null;
 523                                 }
 524                         }
 525                 }
 526
 527                 // still missing title or body, so we detect using Readability
 528                 if ($detect_title || $detect_body) {
 529                         $this->debug('Using Readability');
 530                         // clone body if we're only using Readability for title (otherwise it may interfere with body element)
 531                         if (isset($this->body)) $this->body = $this->body->cloneNode(true);
 532                         $success = $this->readability->init();
 533                 }
 534                 if ($detect_title) {
 535                         $this->debug('Detecting title');
 536                         $this->title = $this->readability->getTitle()->textContent;
 537                 }
 538                 if ($detect_body && $success) {
 539                         $this->debug('Detecting body');
 540                         $this->body = $this->readability->getContent();
 541                         if ($this->body->childNodes->length == 1 && $this->body->firstChild->nodeType === XML_ELEMENT_NODE) {
 542                                 $this->body = $this->body->firstChild;
 543                         }
 544                         // prune (clean up elements that may not be content)
 545                         if ($this->config->prune) {
 546                                 $this->debug('Pruning content');
 547                                 $this->readability->prepArticle($this->body);
 548                         }
 549                 }
 550                 if (isset($this->body)) {
 551                         // remove scripts
 552                         $this->readability->removeScripts($this->body);
 553                         // remove any h1-h6 elements that appear as first thing in the body
 554                         // and which match our title
 555                         if (isset($this->title) && ($this->title != '')) {
 556                                 $firstChild = $this->body->firstChild;
 557                                 while ($firstChild->nodeType && ($firstChild->nodeType !== XML_ELEMENT_NODE)) {
 558                                         $firstChild = $firstChild->nextSibling;
 559                                 }
 560                                 if (($firstChild->nodeType === XML_ELEMENT_NODE)
 561                                         && in_array(strtolower($firstChild->tagName), array('h1', 'h2', 'h3', 'h4', 'h5', 'h6'))
 562                                         && (strtolower(trim($firstChild->textContent)) == strtolower(trim($this->title)))) {
 563                                                 $this->body->removeChild($firstChild);
 564                                 }
 565                         }
 566                         $this->success = true;
 567                 }
 568
 569                 // if we've had no success and we've used tidy, there's a chance
 570                 // that tidy has messed up. So let's try again without tidy...
 571                 if (!$this->success && $tidied && $smart_tidy) {
 572                         $this->debug('Trying again without tidy');
 573                         $this->process($original_html, $url, false);
 574                 }
 575
 576                 return $this->success;
 577         }
 578
 579         private function isDescendant(DOMElement $parent, DOMElement $child) {
 580                 $node = $child->parentNode;
 581                 while ($node != null) {
 582                         if ($node->isSameNode($parent)) return true;
 583                         $node = $node->parentNode;
 584                 }
 585                 return false;
 586         }
 587
 588         public function getContent() {
 589                 return $this->body;
 590         }
 591
 592         public function getTitle() {
 593                 return $this->title;
 594         }
 595
 596         public function getAuthors() {
 597                 return $this->author;
 598         }
 599
 600         public function getLanguage() {
 601                 return $this->language;
 602         }
 603
 604         public function getDate() {
 605                 return $this->date;
 606         }
 607
 608         public function getSiteConfig() {
 609                 return $this->config;
 610         }
 611 }
 612 ?>