From 3ec62cf95ab4436923d4c665fad7aef226cbb822 Mon Sep 17 00:00:00 2001 From: Maryana Rozhankivska Date: Thu, 22 May 2014 17:16:38 +0300 Subject: update to 3.2 version of full-text-rss, issue #694 --- .../content-extractor/ContentExtractor.php | 1455 ++++++++++---------- 1 file changed, 727 insertions(+), 728 deletions(-) (limited to 'inc/3rdparty/libraries/content-extractor/ContentExtractor.php') diff --git a/inc/3rdparty/libraries/content-extractor/ContentExtractor.php b/inc/3rdparty/libraries/content-extractor/ContentExtractor.php index ddd33bb5..21e693e7 100644 --- a/inc/3rdparty/libraries/content-extractor/ContentExtractor.php +++ b/inc/3rdparty/libraries/content-extractor/ContentExtractor.php @@ -1,728 +1,727 @@ - true, - 'output-xhtml' => true, - 'logical-emphasis' => true, - 'show-body-only' => false, - 'new-blocklevel-tags' => 'article, aside, footer, header, hgroup, menu, nav, section, details, datagrid', - 'new-inline-tags' => 'mark, time, meter, progress, data', - 'wrap' => 0, - 'drop-empty-paras' => true, - 'drop-proprietary-attributes' => false, - 'enclose-text' => true, - 'enclose-block-text' => true, - 'merge-divs' => true, - 'merge-spans' => true, - 'char-encoding' => 'utf8', - 'hide-comments' => true - ); - protected $html; - protected $config; - protected $title; - protected $author = array(); - protected $language; - protected $date; - protected $body; - protected $success = false; - protected $nextPageUrl; - public $allowedParsers = array('libxml', 'html5lib'); - public $fingerprints = array(); - public $readability; - public $debug = false; - public $debugVerbose = false; - - function __construct($path, $fallback=null) { - SiteConfig::set_config_path($path, $fallback); - } - - protected function debug($msg) { - if ($this->debug) { - $mem = round(memory_get_usage()/1024, 2); - $memPeak = round(memory_get_peak_usage()/1024, 2); - echo '* ',$msg; - if ($this->debugVerbose) echo ' - mem used: ',$mem," (peak: $memPeak)"; - echo "\n"; - ob_flush(); - flush(); - } - } - - public function reset() { - $this->html = null; - $this->readability = null; - $this->config = null; - $this->title = null; - $this->body = null; - $this->author = array(); - $this->language = null; - $this->date = null; - $this->nextPageUrl = null; - $this->success = false; - } - - public function findHostUsingFingerprints($html) { - $this->debug('Checking fingerprints...'); - $head = substr($html, 0, 8000); - foreach ($this->fingerprints as $_fp => $_fphost) { - $lookin = 'html'; - if (is_array($_fphost)) { - if (isset($_fphost['head']) && $_fphost['head']) { - $lookin = 'head'; - } - $_fphost = $_fphost['hostname']; - } - if (strpos($$lookin, $_fp) !== false) { - $this->debug("Found match: $_fphost"); - return $_fphost; - } - } - $this->debug('No fingerprint matches'); - return false; - } - - // returns SiteConfig instance (joined in order: exact match, wildcard, fingerprint, global, default) - public function buildSiteConfig($url, $html='', $add_to_cache=true) { - // extract host name - $host = @parse_url($url, PHP_URL_HOST); - $host = strtolower($host); - if (substr($host, 0, 4) == 'www.') $host = substr($host, 4); - // is merged version already cached? - if (SiteConfig::is_cached("$host.merged")) { - $this->debug("Returning cached and merged site config for $host"); - return SiteConfig::build("$host.merged"); - } - // let's build from site_config/custom/ and standard/ - $config = SiteConfig::build($host); - if ($add_to_cache && $config && !SiteConfig::is_cached("$host")) { - SiteConfig::add_to_cache($host, $config); - } - // if no match, use defaults - if (!$config) $config = new SiteConfig(); - // load fingerprint config? - if ($config->autodetect_on_failure()) { - // check HTML for fingerprints - if (!empty($this->fingerprints) && ($_fphost = $this->findHostUsingFingerprints($html))) { - if ($config_fingerprint = SiteConfig::build($_fphost)) { - $this->debug("Appending site config settings from $_fphost (fingerprint match)"); - $config->append($config_fingerprint); - if ($add_to_cache && !SiteConfig::is_cached($_fphost)) { - //$config_fingerprint->cache_in_apc = true; - SiteConfig::add_to_cache($_fphost, $config_fingerprint); - } - } - } - } - // load global config? - if ($config->autodetect_on_failure()) { - if ($config_global = SiteConfig::build('global', true)) { - $this->debug('Appending site config settings from global.txt'); - $config->append($config_global); - if ($add_to_cache && !SiteConfig::is_cached('global')) { - //$config_global->cache_in_apc = true; - SiteConfig::add_to_cache('global', $config_global); - } - } - } - // store copy of merged config - if ($add_to_cache) { - // do not store in APC if wildcard match - $use_apc = ($host == $config->cache_key); - $config->cache_key = null; - SiteConfig::add_to_cache("$host.merged", $config, $use_apc); - } - return $config; - } - - // returns true on success, false on failure - // $smart_tidy indicates that if tidy is used and no results are produced, we will - // try again without it. Tidy helps us deal with PHP's patchy HTML parsing most of the time - // but it has problems of its own which we try to avoid with this option. - public function process($html, $url, $smart_tidy=true) { - $this->reset(); - $this->config = $this->buildSiteConfig($url, $html); - - // do string replacements - if (!empty($this->config->find_string)) { - if (count($this->config->find_string) == count($this->config->replace_string)) { - $html = str_replace($this->config->find_string, $this->config->replace_string, $html, $_count); - $this->debug("Strings replaced: $_count (find_string and/or replace_string)"); - } else { - $this->debug('Skipped string replacement - incorrect number of find-replace strings in site config'); - } - unset($_count); - } - - // use tidy (if it exists)? - // This fixes problems with some sites which would otherwise - // trouble DOMDocument's HTML parsing. (Although sometimes it - // makes matters worse, which is why you can override it in site config files.) - $tidied = false; - if ($this->config->tidy() && function_exists('tidy_parse_string') && $smart_tidy) { - $this->debug('Using Tidy'); - $tidy = tidy_parse_string($html, self::$tidy_config, 'UTF8'); - if (tidy_clean_repair($tidy)) { - $original_html = $html; - $tidied = true; - $html = $tidy->value; - } - unset($tidy); - } - - // load and parse html - $_parser = $this->config->parser(); - if (!in_array($_parser, $this->allowedParsers)) { - $this->debug("HTML parser $_parser not listed, using libxml instead"); - $_parser = 'libxml'; - } - $this->debug("Attempting to parse HTML with $_parser"); - $this->readability = new Readability($html, $url, $_parser); - - // we use xpath to find elements in the given HTML document - // see http://en.wikipedia.org/wiki/XPath_1.0 - $xpath = new DOMXPath($this->readability->dom); - - // try to get next page link - foreach ($this->config->next_page_link as $pattern) { - $elems = @$xpath->evaluate($pattern, $this->readability->dom); - if (is_string($elems)) { - $this->nextPageUrl = trim($elems); - break; - } elseif ($elems instanceof DOMNodeList && $elems->length > 0) { - foreach ($elems as $item) { - if ($item instanceof DOMElement && $item->hasAttribute('href')) { - $this->nextPageUrl = $item->getAttribute('href'); - break 2; - } elseif ($item instanceof DOMAttr && $item->value) { - $this->nextPageUrl = $item->value; - break 2; - } - } - } - } - - // try to get title - foreach ($this->config->title as $pattern) { - // $this->debug("Trying $pattern"); - $elems = @$xpath->evaluate($pattern, $this->readability->dom); - if (is_string($elems)) { - $this->title = trim($elems); - $this->debug('Title expression evaluated as string: '.$this->title); - $this->debug("...XPath match: $pattern"); - break; - } elseif ($elems instanceof DOMNodeList && $elems->length > 0) { - $this->title = $elems->item(0)->textContent; - $this->debug('Title matched: '.$this->title); - $this->debug("...XPath match: $pattern"); - // remove title from document - try { - $elems->item(0)->parentNode->removeChild($elems->item(0)); - } catch (DOMException $e) { - // do nothing - } - break; - } - } - - // try to get author (if it hasn't already been set) - if (empty($this->author)) { - foreach ($this->config->author as $pattern) { - $elems = @$xpath->evaluate($pattern, $this->readability->dom); - if (is_string($elems)) { - if (trim($elems) != '') { - $this->author[] = trim($elems); - $this->debug('Author expression evaluated as string: '.trim($elems)); - $this->debug("...XPath match: $pattern"); - break; - } - } elseif ($elems instanceof DOMNodeList && $elems->length > 0) { - foreach ($elems as $elem) { - if (!isset($elem->parentNode)) continue; - $this->author[] = trim($elem->textContent); - $this->debug('Author matched: '.trim($elem->textContent)); - } - if (!empty($this->author)) { - $this->debug("...XPath match: $pattern"); - break; - } - } - } - } - - // try to get language - $_lang_xpath = array('//html[@lang]/@lang', '//meta[@name="DC.language"]/@content'); - foreach ($_lang_xpath as $pattern) { - $elems = @$xpath->evaluate($pattern, $this->readability->dom); - if (is_string($elems)) { - if (trim($elems) != '') { - $this->language = trim($elems); - $this->debug('Language matched: '.$this->language); - break; - } - } elseif ($elems instanceof DOMNodeList && $elems->length > 0) { - foreach ($elems as $elem) { - if (!isset($elem->parentNode)) continue; - $this->language = trim($elem->textContent); - $this->debug('Language matched: '.$this->language); - } - if ($this->language) break; - } - } - - // try to get date - foreach ($this->config->date as $pattern) { - $elems = @$xpath->evaluate($pattern, $this->readability->dom); - if (is_string($elems)) { - $this->date = strtotime(trim($elems, "; \t\n\r\0\x0B")); - } elseif ($elems instanceof DOMNodeList && $elems->length > 0) { - $this->date = $elems->item(0)->textContent; - $this->date = strtotime(trim($this->date, "; \t\n\r\0\x0B")); - // remove date from document - // $elems->item(0)->parentNode->removeChild($elems->item(0)); - } - if (!$this->date) { - $this->date = null; - } else { - $this->debug('Date matched: '.date('Y-m-d H:i:s', $this->date)); - $this->debug("...XPath match: $pattern"); - break; - } - } - - // strip elements (using xpath expressions) - foreach ($this->config->strip as $pattern) { - $elems = @$xpath->query($pattern, $this->readability->dom); - // check for matches - if ($elems && $elems->length > 0) { - $this->debug('Stripping '.$elems->length.' elements (strip)'); - for ($i=$elems->length-1; $i >= 0; $i--) { - $elems->item($i)->parentNode->removeChild($elems->item($i)); - } - } - } - - // strip elements (using id and class attribute values) - foreach ($this->config->strip_id_or_class as $string) { - $string = strtr($string, array("'"=>'', '"'=>'')); - $elems = @$xpath->query("//*[contains(@class, '$string') or contains(@id, '$string')]", $this->readability->dom); - // check for matches - if ($elems && $elems->length > 0) { - $this->debug('Stripping '.$elems->length.' elements (strip_id_or_class)'); - for ($i=$elems->length-1; $i >= 0; $i--) { - $elems->item($i)->parentNode->removeChild($elems->item($i)); - } - } - } - - // strip images (using src attribute values) - foreach ($this->config->strip_image_src as $string) { - $string = strtr($string, array("'"=>'', '"'=>'')); - $elems = @$xpath->query("//img[contains(@src, '$string')]", $this->readability->dom); - // check for matches - if ($elems && $elems->length > 0) { - $this->debug('Stripping '.$elems->length.' image elements'); - for ($i=$elems->length-1; $i >= 0; $i--) { - $elems->item($i)->parentNode->removeChild($elems->item($i)); - } - } - } - // strip elements using Readability.com and Instapaper.com ignore class names - // .entry-unrelated and .instapaper_ignore - // See https://www.readability.com/publishers/guidelines/#view-plainGuidelines - // and http://blog.instapaper.com/post/730281947 - $elems = @$xpath->query("//*[contains(concat(' ',normalize-space(@class),' '),' entry-unrelated ') or contains(concat(' ',normalize-space(@class),' '),' instapaper_ignore ')]", $this->readability->dom); - // check for matches - if ($elems && $elems->length > 0) { - $this->debug('Stripping '.$elems->length.' .entry-unrelated,.instapaper_ignore elements'); - for ($i=$elems->length-1; $i >= 0; $i--) { - $elems->item($i)->parentNode->removeChild($elems->item($i)); - } - } - - // strip elements that contain style="display: none;" - $elems = @$xpath->query("//*[contains(@style,'display:none')]", $this->readability->dom); - // check for matches - if ($elems && $elems->length > 0) { - $this->debug('Stripping '.$elems->length.' elements with inline display:none style'); - for ($i=$elems->length-1; $i >= 0; $i--) { - $elems->item($i)->parentNode->removeChild($elems->item($i)); - } - } - - // try to get body - foreach ($this->config->body as $pattern) { - $elems = @$xpath->query($pattern, $this->readability->dom); - // check for matches - if ($elems && $elems->length > 0) { - $this->debug('Body matched'); - $this->debug("...XPath match: $pattern"); - if ($elems->length == 1) { - $this->body = $elems->item(0); - // prune (clean up elements that may not be content) - if ($this->config->prune()) { - $this->debug('...pruning content'); - $this->readability->prepArticle($this->body); - } - break; - } else { - $this->body = $this->readability->dom->createElement('div'); - $this->debug($elems->length.' body elems found'); - foreach ($elems as $elem) { - if (!isset($elem->parentNode)) continue; - $isDescendant = false; - foreach ($this->body->childNodes as $parent) { - if ($this->isDescendant($parent, $elem)) { - $isDescendant = true; - break; - } - } - if ($isDescendant) { - $this->debug('...element is child of another body element, skipping.'); - } else { - // prune (clean up elements that may not be content) - if ($this->config->prune()) { - $this->debug('Pruning content'); - $this->readability->prepArticle($elem); - } - $this->debug('...element added to body'); - $this->body->appendChild($elem); - } - } - if ($this->body->hasChildNodes()) break; - } - } - } - - // auto detect? - $detect_title = $detect_body = $detect_author = $detect_date = false; - // detect title? - if (!isset($this->title)) { - if (empty($this->config->title) || $this->config->autodetect_on_failure()) { - $detect_title = true; - } - } - // detect body? - if (!isset($this->body)) { - if (empty($this->config->body) || $this->config->autodetect_on_failure()) { - $detect_body = true; - } - } - // detect author? - if (empty($this->author)) { - if (empty($this->config->author) || $this->config->autodetect_on_failure()) { - $detect_author = true; - } - } - // detect date? - if (!isset($this->date)) { - if (empty($this->config->date) || $this->config->autodetect_on_failure()) { - $detect_date = true; - } - } - - // check for hNews - if ($detect_title || $detect_body) { - // check for hentry - $elems = @$xpath->query("//*[contains(concat(' ',normalize-space(@class),' '),' hentry ')]", $this->readability->dom); - if ($elems && $elems->length > 0) { - $this->debug('hNews: found hentry'); - $hentry = $elems->item(0); - - if ($detect_title) { - // check for entry-title - $elems = @$xpath->query(".//*[contains(concat(' ',normalize-space(@class),' '),' entry-title ')]", $hentry); - if ($elems && $elems->length > 0) { - $this->title = $elems->item(0)->textContent; - $this->debug('hNews: found entry-title: '.$this->title); - // remove title from document - $elems->item(0)->parentNode->removeChild($elems->item(0)); - $detect_title = false; - } - } - - if ($detect_date) { - // check for time element with pubdate attribute - $elems = @$xpath->query(".//time[@pubdate] | .//abbr[contains(concat(' ',normalize-space(@class),' '),' published ')]", $hentry); - if ($elems && $elems->length > 0) { - $this->date = strtotime(trim($elems->item(0)->textContent)); - // remove date from document - //$elems->item(0)->parentNode->removeChild($elems->item(0)); - if ($this->date) { - $this->debug('hNews: found publication date: '.date('Y-m-d H:i:s', $this->date)); - $detect_date = false; - } else { - $this->date = null; - } - } - } - - if ($detect_author) { - // check for time element with pubdate attribute - $elems = @$xpath->query(".//*[contains(concat(' ',normalize-space(@class),' '),' vcard ') and (contains(concat(' ',normalize-space(@class),' '),' author ') or contains(concat(' ',normalize-space(@class),' '),' byline '))]", $hentry); - if ($elems && $elems->length > 0) { - $author = $elems->item(0); - $fn = @$xpath->query(".//*[contains(concat(' ',normalize-space(@class),' '),' fn ')]", $author); - if ($fn && $fn->length > 0) { - foreach ($fn as $_fn) { - if (trim($_fn->textContent) != '') { - $this->author[] = trim($_fn->textContent); - $this->debug('hNews: found author: '.trim($_fn->textContent)); - } - } - } else { - if (trim($author->textContent) != '') { - $this->author[] = trim($author->textContent); - $this->debug('hNews: found author: '.trim($author->textContent)); - } - } - $detect_author = empty($this->author); - } - } - - // check for entry-content. - // according to hAtom spec, if there are multiple elements marked entry-content, - // we include all of these in the order they appear - see http://microformats.org/wiki/hatom#Entry_Content - if ($detect_body) { - $elems = @$xpath->query(".//*[contains(concat(' ',normalize-space(@class),' '),' entry-content ')]", $hentry); - if ($elems && $elems->length > 0) { - $this->debug('hNews: found entry-content'); - if ($elems->length == 1) { - // what if it's empty? (some sites misuse hNews - place their content outside an empty entry-content element) - $e = $elems->item(0); - if (($e->tagName == 'img') || (trim($e->textContent) != '')) { - $this->body = $elems->item(0); - // prune (clean up elements that may not be content) - if ($this->config->prune()) { - $this->debug('Pruning content'); - $this->readability->prepArticle($this->body); - } - $detect_body = false; - } else { - $this->debug('hNews: skipping entry-content - appears not to contain content'); - } - unset($e); - } else { - $this->body = $this->readability->dom->createElement('div'); - $this->debug($elems->length.' entry-content elems found'); - foreach ($elems as $elem) { - if (!isset($elem->parentNode)) continue; - $isDescendant = false; - foreach ($this->body->childNodes as $parent) { - if ($this->isDescendant($parent, $elem)) { - $isDescendant = true; - break; - } - } - if ($isDescendant) { - $this->debug('Element is child of another body element, skipping.'); - } else { - // prune (clean up elements that may not be content) - if ($this->config->prune()) { - $this->debug('Pruning content'); - $this->readability->prepArticle($elem); - } - $this->debug('Element added to body'); - $this->body->appendChild($elem); - } - } - $detect_body = false; - } - } - } - } - } - - // check for elements marked with instapaper_title - if ($detect_title) { - // check for instapaper_title - $elems = @$xpath->query("//*[contains(concat(' ',normalize-space(@class),' '),' instapaper_title ')]", $this->readability->dom); - if ($elems && $elems->length > 0) { - $this->title = $elems->item(0)->textContent; - $this->debug('Title found (.instapaper_title): '.$this->title); - // remove title from document - $elems->item(0)->parentNode->removeChild($elems->item(0)); - $detect_title = false; - } - } - // check for elements marked with instapaper_body - if ($detect_body) { - $elems = @$xpath->query("//*[contains(concat(' ',normalize-space(@class),' '),' instapaper_body ')]", $this->readability->dom); - if ($elems && $elems->length > 0) { - $this->debug('body found (.instapaper_body)'); - $this->body = $elems->item(0); - // prune (clean up elements that may not be content) - if ($this->config->prune()) { - $this->debug('Pruning content'); - $this->readability->prepArticle($this->body); - } - $detect_body = false; - } - } - - // Find author in rel="author" marked element - // We only use this if there's exactly one. - // If there's more than one, it could indicate more than - // one author, but it could also indicate that we're processing - // a page listing different articles with different authors. - if ($detect_author) { - $elems = @$xpath->query("//a[contains(concat(' ',normalize-space(@rel),' '),' author ')]", $this->readability->dom); - if ($elems && $elems->length == 1) { - $author = trim($elems->item(0)->textContent); - if ($author != '') { - $this->debug("Author found (rel=\"author\"): $author"); - $this->author[] = $author; - $detect_author = false; - } - } - } - - // Find date in pubdate marked time element - // For the same reason given above, we only use this - // if there's exactly one element. - if ($detect_date) { - $elems = @$xpath->query("//time[@pubdate]", $this->readability->dom); - if ($elems && $elems->length == 1) { - $this->date = strtotime(trim($elems->item(0)->textContent)); - // remove date from document - //$elems->item(0)->parentNode->removeChild($elems->item(0)); - if ($this->date) { - $this->debug('Date found (pubdate marked time element): '.date('Y-m-d H:i:s', $this->date)); - $detect_date = false; - } else { - $this->date = null; - } - } - } - - // still missing title or body, so we detect using Readability - if ($detect_title || $detect_body) { - $this->debug('Using Readability'); - // clone body if we're only using Readability for title (otherwise it may interfere with body element) - if (isset($this->body)) $this->body = $this->body->cloneNode(true); - $success = $this->readability->init(); - } - if ($detect_title) { - $this->debug('Detecting title'); - $this->title = $this->readability->getTitle()->textContent; - } - if ($detect_body && $success) { - $this->debug('Detecting body'); - $this->body = $this->readability->getContent(); - if ($this->body->childNodes->length == 1 && $this->body->firstChild->nodeType === XML_ELEMENT_NODE) { - $this->body = $this->body->firstChild; - } - // prune (clean up elements that may not be content) - if ($this->config->prune()) { - $this->debug('Pruning content'); - $this->readability->prepArticle($this->body); - } - } - if (isset($this->body)) { - // remove scripts - $this->readability->removeScripts($this->body); - // remove any h1-h6 elements that appear as first thing in the body - // and which match our title - if (isset($this->title) && ($this->title != '')) { - $firstChild = $this->body->firstChild; - while ($firstChild->nodeType && ($firstChild->nodeType !== XML_ELEMENT_NODE)) { - $firstChild = $firstChild->nextSibling; - } - if (($firstChild->nodeType === XML_ELEMENT_NODE) - && in_array(strtolower($firstChild->tagName), array('h1', 'h2', 'h3', 'h4', 'h5', 'h6')) - && (strtolower(trim($firstChild->textContent)) == strtolower(trim($this->title)))) { - $this->body->removeChild($firstChild); - } - } - // prevent self-closing iframes - $elems = $this->body->getElementsByTagName('iframe'); - for ($i = $elems->length-1; $i >= 0; $i--) { - $e = $elems->item($i); - if (!$e->hasChildNodes()) { - $e->appendChild($this->body->ownerDocument->createTextNode('[embedded content]')); - } - } - // remove image lazy loading - WordPress plugin http://wordpress.org/extend/plugins/lazy-load/ - // the plugin replaces the src attribute to point to a 1x1 gif and puts the original src - // inside the data-lazy-src attribute. It also places the original image inside a noscript element - // next to the amended one. - $elems = @$xpath->query("//img[@data-lazy-src]", $this->body); - for ($i = $elems->length-1; $i >= 0; $i--) { - $e = $elems->item($i); - // let's see if we can grab image from noscript - if ($e->nextSibling !== null && $e->nextSibling->nodeName === 'noscript') { - $_new_elem = $e->ownerDocument->createDocumentFragment(); - @$_new_elem->appendXML($e->nextSibling->innerHTML); - $e->nextSibling->parentNode->replaceChild($_new_elem, $e->nextSibling); - $e->parentNode->removeChild($e); - } else { - // Use data-lazy-src as src value - $e->setAttribute('src', $e->getAttribute('data-lazy-src')); - $e->removeAttribute('data-lazy-src'); - } - } - - $this->success = true; - } - - // if we've had no success and we've used tidy, there's a chance - // that tidy has messed up. So let's try again without tidy... - if (!$this->success && $tidied && $smart_tidy) { - $this->debug('Trying again without tidy'); - $this->process($original_html, $url, false); - } - - return $this->success; - } - - private function isDescendant(DOMElement $parent, DOMElement $child) { - $node = $child->parentNode; - while ($node != null) { - if ($node->isSameNode($parent)) return true; - $node = $node->parentNode; - } - return false; - } - - public function getContent() { - return $this->body; - } - - public function getTitle() { - return $this->title; - } - - public function getAuthors() { - return $this->author; - } - - public function getLanguage() { - return $this->language; - } - - public function getDate() { - return $this->date; - } - - public function getSiteConfig() { - return $this->config; - } - - public function getNextPageUrl() { - return $this->nextPageUrl; - } -} -?> \ No newline at end of file + true, + 'output-xhtml' => true, + 'logical-emphasis' => true, + 'show-body-only' => false, + 'new-blocklevel-tags' => 'article, aside, footer, header, hgroup, menu, nav, section, details, datagrid', + 'new-inline-tags' => 'mark, time, meter, progress, data', + 'wrap' => 0, + 'drop-empty-paras' => true, + 'drop-proprietary-attributes' => false, + 'enclose-text' => true, + 'enclose-block-text' => true, + 'merge-divs' => true, + 'merge-spans' => true, + 'char-encoding' => 'utf8', + 'hide-comments' => true + ); + protected $html; + protected $config; + protected $title; + protected $author = array(); + protected $language; + protected $date; + protected $body; + protected $success = false; + protected $nextPageUrl; + public $allowedParsers = array('libxml', 'html5lib'); + public $fingerprints = array(); + public $readability; + public $debug = false; + public $debugVerbose = false; + + function __construct($path, $fallback=null) { + SiteConfig::set_config_path($path, $fallback); + } + + protected function debug($msg) { + if ($this->debug) { + $mem = round(memory_get_usage()/1024, 2); + $memPeak = round(memory_get_peak_usage()/1024, 2); + echo '* ',$msg; + if ($this->debugVerbose) echo ' - mem used: ',$mem," (peak: $memPeak)"; + echo "\n"; + ob_flush(); + flush(); + } + } + + public function reset() { + $this->html = null; + $this->readability = null; + $this->config = null; + $this->title = null; + $this->body = null; + $this->author = array(); + $this->language = null; + $this->date = null; + $this->nextPageUrl = null; + $this->success = false; + } + + public function findHostUsingFingerprints($html) { + $this->debug('Checking fingerprints...'); + $head = substr($html, 0, 8000); + foreach ($this->fingerprints as $_fp => $_fphost) { + $lookin = 'html'; + if (is_array($_fphost)) { + if (isset($_fphost['head']) && $_fphost['head']) { + $lookin = 'head'; + } + $_fphost = $_fphost['hostname']; + } + if (strpos($$lookin, $_fp) !== false) { + $this->debug("Found match: $_fphost"); + return $_fphost; + } + } + $this->debug('No fingerprint matches'); + return false; + } + + // returns SiteConfig instance (joined in order: exact match, wildcard, fingerprint, global, default) + public function buildSiteConfig($url, $html='', $add_to_cache=true) { + // extract host name + $host = @parse_url($url, PHP_URL_HOST); + $host = strtolower($host); + if (substr($host, 0, 4) == 'www.') $host = substr($host, 4); + // is merged version already cached? + if (SiteConfig::is_cached("$host.merged")) { + $this->debug("Returning cached and merged site config for $host"); + return SiteConfig::build("$host.merged"); + } + // let's build from site_config/custom/ and standard/ + $config = SiteConfig::build($host); + if ($add_to_cache && $config && !SiteConfig::is_cached("$host")) { + SiteConfig::add_to_cache($host, $config); + } + // if no match, use defaults + if (!$config) $config = new SiteConfig(); + // load fingerprint config? + if ($config->autodetect_on_failure()) { + // check HTML for fingerprints + if (!empty($this->fingerprints) && ($_fphost = $this->findHostUsingFingerprints($html))) { + if ($config_fingerprint = SiteConfig::build($_fphost)) { + $this->debug("Appending site config settings from $_fphost (fingerprint match)"); + $config->append($config_fingerprint); + if ($add_to_cache && !SiteConfig::is_cached($_fphost)) { + //$config_fingerprint->cache_in_apc = true; + SiteConfig::add_to_cache($_fphost, $config_fingerprint); + } + } + } + } + // load global config? + if ($config->autodetect_on_failure()) { + if ($config_global = SiteConfig::build('global', true)) { + $this->debug('Appending site config settings from global.txt'); + $config->append($config_global); + if ($add_to_cache && !SiteConfig::is_cached('global')) { + //$config_global->cache_in_apc = true; + SiteConfig::add_to_cache('global', $config_global); + } + } + } + // store copy of merged config + if ($add_to_cache) { + // do not store in APC if wildcard match + $use_apc = ($host == $config->cache_key); + $config->cache_key = null; + SiteConfig::add_to_cache("$host.merged", $config, $use_apc); + } + return $config; + } + + // returns true on success, false on failure + // $smart_tidy indicates that if tidy is used and no results are produced, we will + // try again without it. Tidy helps us deal with PHP's patchy HTML parsing most of the time + // but it has problems of its own which we try to avoid with this option. + public function process($html, $url, $smart_tidy=true) { + $this->reset(); + $this->config = $this->buildSiteConfig($url, $html); + + // do string replacements + if (!empty($this->config->find_string)) { + if (count($this->config->find_string) == count($this->config->replace_string)) { + $html = str_replace($this->config->find_string, $this->config->replace_string, $html, $_count); + $this->debug("Strings replaced: $_count (find_string and/or replace_string)"); + } else { + $this->debug('Skipped string replacement - incorrect number of find-replace strings in site config'); + } + unset($_count); + } + + // use tidy (if it exists)? + // This fixes problems with some sites which would otherwise + // trouble DOMDocument's HTML parsing. (Although sometimes it + // makes matters worse, which is why you can override it in site config files.) + $tidied = false; + if ($this->config->tidy() && function_exists('tidy_parse_string') && $smart_tidy) { + $this->debug('Using Tidy'); + $tidy = tidy_parse_string($html, self::$tidy_config, 'UTF8'); + if (tidy_clean_repair($tidy)) { + $original_html = $html; + $tidied = true; + $html = $tidy->value; + } + unset($tidy); + } + + // load and parse html + $_parser = $this->config->parser(); + if (!in_array($_parser, $this->allowedParsers)) { + $this->debug("HTML parser $_parser not listed, using libxml instead"); + $_parser = 'libxml'; + } + $this->debug("Attempting to parse HTML with $_parser"); + $this->readability = new Readability($html, $url, $_parser); + + // we use xpath to find elements in the given HTML document + // see http://en.wikipedia.org/wiki/XPath_1.0 + $xpath = new DOMXPath($this->readability->dom); + + // try to get next page link + foreach ($this->config->next_page_link as $pattern) { + $elems = @$xpath->evaluate($pattern, $this->readability->dom); + if (is_string($elems)) { + $this->nextPageUrl = trim($elems); + break; + } elseif ($elems instanceof DOMNodeList && $elems->length > 0) { + foreach ($elems as $item) { + if ($item instanceof DOMElement && $item->hasAttribute('href')) { + $this->nextPageUrl = $item->getAttribute('href'); + break 2; + } elseif ($item instanceof DOMAttr && $item->value) { + $this->nextPageUrl = $item->value; + break 2; + } + } + } + } + + // try to get title + foreach ($this->config->title as $pattern) { + // $this->debug("Trying $pattern"); + $elems = @$xpath->evaluate($pattern, $this->readability->dom); + if (is_string($elems)) { + $this->title = trim($elems); + $this->debug('Title expression evaluated as string: '.$this->title); + $this->debug("...XPath match: $pattern"); + break; + } elseif ($elems instanceof DOMNodeList && $elems->length > 0) { + $this->title = $elems->item(0)->textContent; + $this->debug('Title matched: '.$this->title); + $this->debug("...XPath match: $pattern"); + // remove title from document + try { + @$elems->item(0)->parentNode->removeChild($elems->item(0)); + } catch (DOMException $e) { + // do nothing + } + break; + } + } + + // try to get author (if it hasn't already been set) + if (empty($this->author)) { + foreach ($this->config->author as $pattern) { + $elems = @$xpath->evaluate($pattern, $this->readability->dom); + if (is_string($elems)) { + if (trim($elems) != '') { + $this->author[] = trim($elems); + $this->debug('Author expression evaluated as string: '.trim($elems)); + $this->debug("...XPath match: $pattern"); + break; + } + } elseif ($elems instanceof DOMNodeList && $elems->length > 0) { + foreach ($elems as $elem) { + if (!isset($elem->parentNode)) continue; + $this->author[] = trim($elem->textContent); + $this->debug('Author matched: '.trim($elem->textContent)); + } + if (!empty($this->author)) { + $this->debug("...XPath match: $pattern"); + break; + } + } + } + } + + // try to get language + $_lang_xpath = array('//html[@lang]/@lang', '//meta[@name="DC.language"]/@content'); + foreach ($_lang_xpath as $pattern) { + $elems = @$xpath->evaluate($pattern, $this->readability->dom); + if (is_string($elems)) { + if (trim($elems) != '') { + $this->language = trim($elems); + $this->debug('Language matched: '.$this->language); + break; + } + } elseif ($elems instanceof DOMNodeList && $elems->length > 0) { + foreach ($elems as $elem) { + if (!isset($elem->parentNode)) continue; + $this->language = trim($elem->textContent); + $this->debug('Language matched: '.$this->language); + } + if ($this->language) break; + } + } + + // try to get date + foreach ($this->config->date as $pattern) { + $elems = @$xpath->evaluate($pattern, $this->readability->dom); + if (is_string($elems)) { + $this->date = strtotime(trim($elems, "; \t\n\r\0\x0B")); + } elseif ($elems instanceof DOMNodeList && $elems->length > 0) { + $this->date = $elems->item(0)->textContent; + $this->date = strtotime(trim($this->date, "; \t\n\r\0\x0B")); + // remove date from document + // $elems->item(0)->parentNode->removeChild($elems->item(0)); + } + if (!$this->date) { + $this->date = null; + } else { + $this->debug('Date matched: '.date('Y-m-d H:i:s', $this->date)); + $this->debug("...XPath match: $pattern"); + break; + } + } + + // strip elements (using xpath expressions) + foreach ($this->config->strip as $pattern) { + $elems = @$xpath->query($pattern, $this->readability->dom); + // check for matches + if ($elems && $elems->length > 0) { + $this->debug('Stripping '.$elems->length.' elements (strip)'); + for ($i=$elems->length-1; $i >= 0; $i--) { + $elems->item($i)->parentNode->removeChild($elems->item($i)); + } + } + } + + // strip elements (using id and class attribute values) + foreach ($this->config->strip_id_or_class as $string) { + $string = strtr($string, array("'"=>'', '"'=>'')); + $elems = @$xpath->query("//*[contains(@class, '$string') or contains(@id, '$string')]", $this->readability->dom); + // check for matches + if ($elems && $elems->length > 0) { + $this->debug('Stripping '.$elems->length.' elements (strip_id_or_class)'); + for ($i=$elems->length-1; $i >= 0; $i--) { + $elems->item($i)->parentNode->removeChild($elems->item($i)); + } + } + } + + // strip images (using src attribute values) + foreach ($this->config->strip_image_src as $string) { + $string = strtr($string, array("'"=>'', '"'=>'')); + $elems = @$xpath->query("//img[contains(@src, '$string')]", $this->readability->dom); + // check for matches + if ($elems && $elems->length > 0) { + $this->debug('Stripping '.$elems->length.' image elements'); + for ($i=$elems->length-1; $i >= 0; $i--) { + $elems->item($i)->parentNode->removeChild($elems->item($i)); + } + } + } + // strip elements using Readability.com and Instapaper.com ignore class names + // .entry-unrelated and .instapaper_ignore + // See https://www.readability.com/publishers/guidelines/#view-plainGuidelines + // and http://blog.instapaper.com/post/730281947 + $elems = @$xpath->query("//*[contains(concat(' ',normalize-space(@class),' '),' entry-unrelated ') or contains(concat(' ',normalize-space(@class),' '),' instapaper_ignore ')]", $this->readability->dom); + // check for matches + if ($elems && $elems->length > 0) { + $this->debug('Stripping '.$elems->length.' .entry-unrelated,.instapaper_ignore elements'); + for ($i=$elems->length-1; $i >= 0; $i--) { + $elems->item($i)->parentNode->removeChild($elems->item($i)); + } + } + + // strip elements that contain style="display: none;" + $elems = @$xpath->query("//*[contains(@style,'display:none')]", $this->readability->dom); + // check for matches + if ($elems && $elems->length > 0) { + $this->debug('Stripping '.$elems->length.' elements with inline display:none style'); + for ($i=$elems->length-1; $i >= 0; $i--) { + $elems->item($i)->parentNode->removeChild($elems->item($i)); + } + } + + // try to get body + foreach ($this->config->body as $pattern) { + $elems = @$xpath->query($pattern, $this->readability->dom); + // check for matches + if ($elems && $elems->length > 0) { + $this->debug('Body matched'); + $this->debug("...XPath match: $pattern"); + if ($elems->length == 1) { + $this->body = $elems->item(0); + // prune (clean up elements that may not be content) + if ($this->config->prune()) { + $this->debug('...pruning content'); + $this->readability->prepArticle($this->body); + } + break; + } else { + $this->body = $this->readability->dom->createElement('div'); + $this->debug($elems->length.' body elems found'); + foreach ($elems as $elem) { + if (!isset($elem->parentNode)) continue; + $isDescendant = false; + foreach ($this->body->childNodes as $parent) { + if ($this->isDescendant($parent, $elem)) { + $isDescendant = true; + break; + } + } + if ($isDescendant) { + $this->debug('...element is child of another body element, skipping.'); + } else { + // prune (clean up elements that may not be content) + if ($this->config->prune()) { + $this->debug('Pruning content'); + $this->readability->prepArticle($elem); + } + $this->debug('...element added to body'); + $this->body->appendChild($elem); + } + } + if ($this->body->hasChildNodes()) break; + } + } + } + + // auto detect? + $detect_title = $detect_body = $detect_author = $detect_date = false; + // detect title? + if (!isset($this->title)) { + if (empty($this->config->title) || $this->config->autodetect_on_failure()) { + $detect_title = true; + } + } + // detect body? + if (!isset($this->body)) { + if (empty($this->config->body) || $this->config->autodetect_on_failure()) { + $detect_body = true; + } + } + // detect author? + if (empty($this->author)) { + if (empty($this->config->author) || $this->config->autodetect_on_failure()) { + $detect_author = true; + } + } + // detect date? + if (!isset($this->date)) { + if (empty($this->config->date) || $this->config->autodetect_on_failure()) { + $detect_date = true; + } + } + + // check for hNews + if ($detect_title || $detect_body) { + // check for hentry + $elems = @$xpath->query("//*[contains(concat(' ',normalize-space(@class),' '),' hentry ')]", $this->readability->dom); + if ($elems && $elems->length > 0) { + $this->debug('hNews: found hentry'); + $hentry = $elems->item(0); + + if ($detect_title) { + // check for entry-title + $elems = @$xpath->query(".//*[contains(concat(' ',normalize-space(@class),' '),' entry-title ')]", $hentry); + if ($elems && $elems->length > 0) { + $this->title = $elems->item(0)->textContent; + $this->debug('hNews: found entry-title: '.$this->title); + // remove title from document + $elems->item(0)->parentNode->removeChild($elems->item(0)); + $detect_title = false; + } + } + + if ($detect_date) { + // check for time element with pubdate attribute + $elems = @$xpath->query(".//time[@pubdate] | .//abbr[contains(concat(' ',normalize-space(@class),' '),' published ')]", $hentry); + if ($elems && $elems->length > 0) { + $this->date = strtotime(trim($elems->item(0)->textContent)); + // remove date from document + //$elems->item(0)->parentNode->removeChild($elems->item(0)); + if ($this->date) { + $this->debug('hNews: found publication date: '.date('Y-m-d H:i:s', $this->date)); + $detect_date = false; + } else { + $this->date = null; + } + } + } + + if ($detect_author) { + // check for time element with pubdate attribute + $elems = @$xpath->query(".//*[contains(concat(' ',normalize-space(@class),' '),' vcard ') and (contains(concat(' ',normalize-space(@class),' '),' author ') or contains(concat(' ',normalize-space(@class),' '),' byline '))]", $hentry); + if ($elems && $elems->length > 0) { + $author = $elems->item(0); + $fn = @$xpath->query(".//*[contains(concat(' ',normalize-space(@class),' '),' fn ')]", $author); + if ($fn && $fn->length > 0) { + foreach ($fn as $_fn) { + if (trim($_fn->textContent) != '') { + $this->author[] = trim($_fn->textContent); + $this->debug('hNews: found author: '.trim($_fn->textContent)); + } + } + } else { + if (trim($author->textContent) != '') { + $this->author[] = trim($author->textContent); + $this->debug('hNews: found author: '.trim($author->textContent)); + } + } + $detect_author = empty($this->author); + } + } + + // check for entry-content. + // according to hAtom spec, if there are multiple elements marked entry-content, + // we include all of these in the order they appear - see http://microformats.org/wiki/hatom#Entry_Content + if ($detect_body) { + $elems = @$xpath->query(".//*[contains(concat(' ',normalize-space(@class),' '),' entry-content ')]", $hentry); + if ($elems && $elems->length > 0) { + $this->debug('hNews: found entry-content'); + if ($elems->length == 1) { + // what if it's empty? (some sites misuse hNews - place their content outside an empty entry-content element) + $e = $elems->item(0); + if (($e->tagName == 'img') || (trim($e->textContent) != '')) { + $this->body = $elems->item(0); + // prune (clean up elements that may not be content) + if ($this->config->prune()) { + $this->debug('Pruning content'); + $this->readability->prepArticle($this->body); + } + $detect_body = false; + } else { + $this->debug('hNews: skipping entry-content - appears not to contain content'); + } + unset($e); + } else { + $this->body = $this->readability->dom->createElement('div'); + $this->debug($elems->length.' entry-content elems found'); + foreach ($elems as $elem) { + if (!isset($elem->parentNode)) continue; + $isDescendant = false; + foreach ($this->body->childNodes as $parent) { + if ($this->isDescendant($parent, $elem)) { + $isDescendant = true; + break; + } + } + if ($isDescendant) { + $this->debug('Element is child of another body element, skipping.'); + } else { + // prune (clean up elements that may not be content) + if ($this->config->prune()) { + $this->debug('Pruning content'); + $this->readability->prepArticle($elem); + } + $this->debug('Element added to body'); + $this->body->appendChild($elem); + } + } + $detect_body = false; + } + } + } + } + } + + // check for elements marked with instapaper_title + if ($detect_title) { + // check for instapaper_title + $elems = @$xpath->query("//*[contains(concat(' ',normalize-space(@class),' '),' instapaper_title ')]", $this->readability->dom); + if ($elems && $elems->length > 0) { + $this->title = $elems->item(0)->textContent; + $this->debug('Title found (.instapaper_title): '.$this->title); + // remove title from document + $elems->item(0)->parentNode->removeChild($elems->item(0)); + $detect_title = false; + } + } + // check for elements marked with instapaper_body + if ($detect_body) { + $elems = @$xpath->query("//*[contains(concat(' ',normalize-space(@class),' '),' instapaper_body ')]", $this->readability->dom); + if ($elems && $elems->length > 0) { + $this->debug('body found (.instapaper_body)'); + $this->body = $elems->item(0); + // prune (clean up elements that may not be content) + if ($this->config->prune()) { + $this->debug('Pruning content'); + $this->readability->prepArticle($this->body); + } + $detect_body = false; + } + } + + // Find author in rel="author" marked element + // We only use this if there's exactly one. + // If there's more than one, it could indicate more than + // one author, but it could also indicate that we're processing + // a page listing different articles with different authors. + if ($detect_author) { + $elems = @$xpath->query("//a[contains(concat(' ',normalize-space(@rel),' '),' author ')]", $this->readability->dom); + if ($elems && $elems->length == 1) { + $author = trim($elems->item(0)->textContent); + if ($author != '') { + $this->debug("Author found (rel=\"author\"): $author"); + $this->author[] = $author; + $detect_author = false; + } + } + } + + // Find date in pubdate marked time element + // For the same reason given above, we only use this + // if there's exactly one element. + if ($detect_date) { + $elems = @$xpath->query("//time[@pubdate]", $this->readability->dom); + if ($elems && $elems->length == 1) { + $this->date = strtotime(trim($elems->item(0)->textContent)); + // remove date from document + //$elems->item(0)->parentNode->removeChild($elems->item(0)); + if ($this->date) { + $this->debug('Date found (pubdate marked time element): '.date('Y-m-d H:i:s', $this->date)); + $detect_date = false; + } else { + $this->date = null; + } + } + } + + // still missing title or body, so we detect using Readability + if ($detect_title || $detect_body) { + $this->debug('Using Readability'); + // clone body if we're only using Readability for title (otherwise it may interfere with body element) + if (isset($this->body)) $this->body = $this->body->cloneNode(true); + $success = $this->readability->init(); + } + if ($detect_title) { + $this->debug('Detecting title'); + $this->title = $this->readability->getTitle()->textContent; + } + if ($detect_body && $success) { + $this->debug('Detecting body'); + $this->body = $this->readability->getContent(); + if ($this->body->childNodes->length == 1 && $this->body->firstChild->nodeType === XML_ELEMENT_NODE) { + $this->body = $this->body->firstChild; + } + // prune (clean up elements that may not be content) + if ($this->config->prune()) { + $this->debug('Pruning content'); + $this->readability->prepArticle($this->body); + } + } + if (isset($this->body)) { + // remove scripts + $this->readability->removeScripts($this->body); + // remove any h1-h6 elements that appear as first thing in the body + // and which match our title + if (isset($this->title) && ($this->title != '')) { + $firstChild = $this->body->firstChild; + while ($firstChild->nodeType && ($firstChild->nodeType !== XML_ELEMENT_NODE)) { + $firstChild = $firstChild->nextSibling; + } + if (($firstChild->nodeType === XML_ELEMENT_NODE) + && in_array(strtolower($firstChild->tagName), array('h1', 'h2', 'h3', 'h4', 'h5', 'h6')) + && (strtolower(trim($firstChild->textContent)) == strtolower(trim($this->title)))) { + $this->body->removeChild($firstChild); + } + } + // prevent self-closing iframes + $elems = $this->body->getElementsByTagName('iframe'); + for ($i = $elems->length-1; $i >= 0; $i--) { + $e = $elems->item($i); + if (!$e->hasChildNodes()) { + $e->appendChild($this->body->ownerDocument->createTextNode('[embedded content]')); + } + } + // remove image lazy loading - WordPress plugin http://wordpress.org/extend/plugins/lazy-load/ + // the plugin replaces the src attribute to point to a 1x1 gif and puts the original src + // inside the data-lazy-src attribute. It also places the original image inside a noscript element + // next to the amended one. + $elems = @$xpath->query("//img[@data-lazy-src]", $this->body); + for ($i = $elems->length-1; $i >= 0; $i--) { + $e = $elems->item($i); + // let's see if we can grab image from noscript + if ($e->nextSibling !== null && $e->nextSibling->nodeName === 'noscript') { + $_new_elem = $e->ownerDocument->createDocumentFragment(); + @$_new_elem->appendXML($e->nextSibling->innerHTML); + $e->nextSibling->parentNode->replaceChild($_new_elem, $e->nextSibling); + $e->parentNode->removeChild($e); + } else { + // Use data-lazy-src as src value + $e->setAttribute('src', $e->getAttribute('data-lazy-src')); + $e->removeAttribute('data-lazy-src'); + } + } + + $this->success = true; + } + + // if we've had no success and we've used tidy, there's a chance + // that tidy has messed up. So let's try again without tidy... + if (!$this->success && $tidied && $smart_tidy) { + $this->debug('Trying again without tidy'); + $this->process($original_html, $url, false); + } + + return $this->success; + } + + private function isDescendant(DOMElement $parent, DOMElement $child) { + $node = $child->parentNode; + while ($node != null) { + if ($node->isSameNode($parent)) return true; + $node = $node->parentNode; + } + return false; + } + + public function getContent() { + return $this->body; + } + + public function getTitle() { + return $this->title; + } + + public function getAuthors() { + return $this->author; + } + + public function getLanguage() { + return $this->language; + } + + public function getDate() { + return $this->date; + } + + public function getSiteConfig() { + return $this->config; + } + + public function getNextPageUrl() { + return $this->nextPageUrl; + } +} \ No newline at end of file -- cgit v1.2.3