{
public $url;
+ private $fingerprints = array(
+ // Posterous
+ '<meta name="generator" content="Posterous"' => array('hostname'=>'fingerprint.posterous.com', 'head'=>true),
+ // Blogger
+ '<meta content=\'blogger\' name=\'generator\'' => array('hostname'=>'fingerprint.blogspot.com', 'head'=>true),
+ '<meta name="generator" content="Blogger"' => array('hostname'=>'fingerprint.blogspot.com', 'head'=>true),
+ // WordPress (self-hosted and hosted)
+ '<meta name="generator" content="WordPress' => array('hostname'=>'fingerprint.wordpress.com', 'head'=>true)
+ );
+
+ private $user_agents = array( 'lifehacker.com' => 'PHP/5.2',
+ 'gawker.com' => 'PHP/5.2',
+ 'deadspin.com' => 'PHP/5.2',
+ 'kotaku.com' => 'PHP/5.2',
+ 'jezebel.com' => 'PHP/5.2',
+ 'io9.com' => 'PHP/5.2',
+ 'jalopnik.com' => 'PHP/5.2',
+ 'gizmodo.com' => 'PHP/5.2',
+ '.wikipedia.org' => 'Mozilla/5.2'
+ );
+
+ private $content_type_exc = array(
+ 'application/pdf' => array('action'=>'link', 'name'=>'PDF'),
+ 'image' => array('action'=>'link', 'name'=>'Image'),
+ 'audio' => array('action'=>'link', 'name'=>'Audio'),
+ 'video' => array('action'=>'link', 'name'=>'Video')
+ );
+
+ private $rewrite_url = array(
+ // Rewrite public Google Docs URLs to point to HTML view:
+ // if a URL contains docs.google.com, replace /Doc? with /View?
+ 'docs.google.com' => array('/Doc?' => '/View?'),
+ 'tnr.com' => array('tnr.com/article/' => 'tnr.com/print/article/'),
+ '.m.wikipedia.org' => array('.m.wikipedia.org' => '.wikipedia.org')
+ );
+
+ private $rewrite_relative_urls = true;
+ private $error_message = '[unable to retrieve full-text content]';
+
function __construct($url)
{
$this->url = base64_decode($url);
$this->url = $url;
}
- public function isCorrect()
- {
+ public function isCorrect() {
return filter_var($this->url, FILTER_VALIDATE_URL) !== FALSE;
}
- public function clean()
- {
- $url = html_entity_decode(trim($this->url));
-
- $stuff = strpos($url,'&utm_source=');
- if ($stuff !== FALSE)
- $url = substr($url, 0, $stuff);
- $stuff = strpos($url,'?utm_source=');
- if ($stuff !== FALSE)
- $url = substr($url, 0, $stuff);
- $stuff = strpos($url,'#xtor=RSS-');
- if ($stuff !== FALSE)
- $url = substr($url, 0, $stuff);
+ public function extract() {
+ global $http, $extractor;
+ $extractor = new ContentExtractor(dirname(__FILE__).'/../3rdparty/site_config/custom', dirname(__FILE__).'/../3rdparty/site_config/standard');
+ $extractor->fingerprints = $this->fingerprints;
- $this->url = $url;
- }
+ $http = new HumbleHttpAgent();
+ $http->userAgentMap = $this->user_agents;
+ $http->headerOnlyTypes = array_keys($this->content_type_exc);
+ $http->rewriteUrls = $this->rewrite_url;
+ $http->userAgentDefault = HumbleHttpAgent::UA_PHP;
+ // configure SimplePie HTTP extension class to use our HumbleHttpAgent instance
+ SimplePie_HumbleHttpAgent::set_agent($http);
+ $feed = new SimplePie();
+ // some feeds use the text/html content type - force_feed tells SimplePie to process anyway
+ $feed->force_feed(true);
+ $feed->set_file_class('SimplePie_HumbleHttpAgent');
+ $feed->feed_url = $this->url;
+ $feed->set_autodiscovery_level(SIMPLEPIE_LOCATOR_NONE);
+ $feed->set_timeout(20);
+ $feed->enable_cache(false);
+ $feed->set_stupidly_fast(true);
+ $feed->enable_order_by_date(false); // we don't want to do anything to the feed
+ $feed->set_url_replacements(array());
+ // initialise the feed
+ // the @ suppresses notices which on some servers causes a 500 internal server error
+ $result = @$feed->init();
+ if ($result && (!is_array($feed->data) || count($feed->data) == 0)) {
+ die('Sorry, no feed items found');
+ }
+ // from now on, we'll identify ourselves as a browser
+ $http->userAgentDefault = HumbleHttpAgent::UA_BROWSER;
+ unset($feed, $result);
- public function fetchContent()
- {
- if ($this->isCorrect()) {
- $this->clean();
- $html = Encoding::toUTF8(Tools::getFile($this->getUrl()));
-
- # if Tools::getFile() if not able to retrieve HTTPS content, try the same URL with HTTP protocol
- if (!preg_match('!^https?://!i', $this->getUrl()) && (!isset($html) || strlen($html) <= 0)) {
- $this->setUrl('http://' . $this->getUrl());
- $html = Encoding::toUTF8(Tools::getFile($this->getUrl()));
+ $feed = new DummySingleItemFeed($this->url);
+
+ $items = $feed->get_items(0, 1);
+ // Request all feed items in parallel (if supported)
+ $urls_sanitized = array();
+ $urls = array();
+ foreach ($items as $key => $item) {
+ $permalink = htmlspecialchars_decode($item->get_permalink());
+ // Colons in URL path segments get encoded by SimplePie, yet some sites expect them unencoded
+ $permalink = str_replace('%3A', ':', $permalink);
+ if ($permalink) {
+ $urls_sanitized[] = $permalink;
}
+ $urls[$key] = $permalink;
+ }
+ $http->fetchAll($urls_sanitized);
+
+ foreach ($items as $key => $item) {
+ $do_content_extraction = true;
+ $extract_result = false;
+ $permalink = $urls[$key];
- if (function_exists('tidy_parse_string')) {
- $tidy = tidy_parse_string($html, array(), 'UTF8');
- $tidy->cleanRepair();
+ // TODO: Allow error codes - some sites return correct content with error status
+ // e.g. prospectmagazine.co.uk returns 403
- //Warning: tidy might fail so, ensure there is still a content
- $body = $tidy->body();
+ if ($permalink && ($response = $http->get($permalink, true)) && ($response['status_code'] < 300 || $response['status_code'] > 400)) {
+ $effective_url = $response['effective_url'];
+ // check if action defined for returned Content-Type
+ $type = null;
+ if (preg_match('!^Content-Type:\s*(([-\w]+)/([-\w\+]+))!im', $response['headers'], $match)) {
+ // look for full mime type (e.g. image/jpeg) or just type (e.g. image)
+ $match[1] = strtolower(trim($match[1]));
+ $match[2] = strtolower(trim($match[2]));
+ foreach (array($match[1], $match[2]) as $_mime) {
+ if (isset($this->content_type_exc[$_mime])) {
+ $type = $match[1];
+ $_act = $this->content_type_exc[$_mime]['action'];
+ $_name = $this->content_type_exc[$_mime]['name'];
+ if ($_act == 'exclude') {
+ continue 2; // skip this feed item entry
+ } elseif ($_act == 'link') {
+ if ($match[2] == 'image') {
+ $html = "<a href=\"$effective_url\"><img src=\"$effective_url\" alt=\"$_name\" /></a>";
+ } else {
+ $html = "<a href=\"$effective_url\">Download $_name</a>";
+ }
+ $title = $_name;
+ $do_content_extraction = false;
+ break;
+ }
+ }
+ }
+ unset($_mime, $_act, $_name, $match);
+ }
+ if ($do_content_extraction) {
+ $html = $response['body'];
+ // remove strange things
+ $html = str_replace('</[>', '', $html);
+ $html = $this->convert_to_utf8($html, $response['headers']);
- //hasChildren does not seem to work, just check the string
- //returned (and do not forget to clean the white spaces)
- if (preg_replace('/\s+/', '', $body->value) !== "<body></body>") {
- $html = $tidy->value;
+ // check site config for single page URL - fetch it if found
+ if ($single_page_response = $this->getSinglePage($item, $html, $effective_url)) {
+ $html = $single_page_response['body'];
+ // remove strange things
+ $html = str_replace('</[>', '', $html);
+ $html = $this->convert_to_utf8($html, $single_page_response['headers']);
+ $effective_url = $single_page_response['effective_url'];
+ unset($single_page_response);
+ }
+ $extract_result = $extractor->process($html, $effective_url);
+ $readability = $extractor->readability;
+ $content_block = ($extract_result) ? $extractor->getContent() : null;
+ }
+ }
+ if ($do_content_extraction) {
+ // if we failed to extract content...
+ if (!$extract_result) {
+ $html = $this->error_message;
+ // keep the original item description
+ $html .= $item->get_description();
+ } else {
+ $readability->clean($content_block, 'select');
+ if ($this->rewrite_relative_urls) $this->makeAbsolute($effective_url, $content_block);
+ if ($content_block->childNodes->length == 1 && $content_block->firstChild->nodeType === XML_ELEMENT_NODE) {
+ $html = $content_block->firstChild->innerHTML;
+ } else {
+ $html = $content_block->innerHTML;
+ }
+ // post-processing cleanup
+ $html = preg_replace('!<p>[\s\h\v]*</p>!u', '', $html);
}
}
+ }
+
+ $title = ($extractor->getTitle() != '' ? $extractor->getTitle() : _('Untitled'));
+ $content = array ('title' => $title, 'body' => $html);
- $parameters = array();
- if (isset($html) and strlen($html) > 0)
- {
- $readability = new Readability($html, $this->getUrl());
- $readability->convertLinksToFootnotes = CONVERT_LINKS_FOOTNOTES;
- $readability->revertForcedParagraphElements = REVERT_FORCED_PARAGRAPH_ELEMENTS;
+ return $content;
+ }
+
+ private function convert_to_utf8($html, $header=null)
+ {
+ $encoding = null;
+ if ($html || $header) {
+ if (is_array($header)) $header = implode("\n", $header);
+ if (!$header || !preg_match_all('/^Content-Type:\s+([^;]+)(?:;\s*charset=["\']?([^;"\'\n]*))?/im', $header, $match, PREG_SET_ORDER)) {
+ // error parsing the response
+ } else {
+ $match = end($match); // get last matched element (in case of redirects)
+ if (isset($match[2])) $encoding = trim($match[2], "\"' \r\n\0\x0B\t");
+ }
+ // TODO: check to see if encoding is supported (can we convert it?)
+ // If it's not, result will be empty string.
+ // For now we'll check for invalid encoding types returned by some sites, e.g. 'none'
+ // Problem URL: http://facta.co.jp/blog/archives/20111026001026.html
+ if (!$encoding || $encoding == 'none') {
+ // search for encoding in HTML - only look at the first 35000 characters
+ $html_head = substr($html, 0, 40000);
+ if (preg_match('/^<\?xml\s+version=(?:"[^"]*"|\'[^\']*\')\s+encoding=("[^"]*"|\'[^\']*\')/s', $html_head, $match)) {
+ $encoding = trim($match[1], '"\'');
+ } elseif (preg_match('/<meta\s+http-equiv=["\']?Content-Type["\']? content=["\'][^;]+;\s*charset=["\']?([^;"\'>]+)/i', $html_head, $match)) {
+ $encoding = trim($match[1]);
+ } elseif (preg_match_all('/<meta\s+([^>]+)>/i', $html_head, $match)) {
+ foreach ($match[1] as $_test) {
+ if (preg_match('/charset=["\']?([^"\']+)/i', $_test, $_m)) {
+ $encoding = trim($_m[1]);
+ break;
+ }
+ }
+ }
+ }
+ if (isset($encoding)) $encoding = trim($encoding);
+ // trim is important here!
+ if (!$encoding || (strtolower($encoding) == 'iso-8859-1')) {
+ // replace MS Word smart qutoes
+ $trans = array();
+ $trans[chr(130)] = '‚'; // Single Low-9 Quotation Mark
+ $trans[chr(131)] = 'ƒ'; // Latin Small Letter F With Hook
+ $trans[chr(132)] = '„'; // Double Low-9 Quotation Mark
+ $trans[chr(133)] = '…'; // Horizontal Ellipsis
+ $trans[chr(134)] = '†'; // Dagger
+ $trans[chr(135)] = '‡'; // Double Dagger
+ $trans[chr(136)] = 'ˆ'; // Modifier Letter Circumflex Accent
+ $trans[chr(137)] = '‰'; // Per Mille Sign
+ $trans[chr(138)] = 'Š'; // Latin Capital Letter S With Caron
+ $trans[chr(139)] = '‹'; // Single Left-Pointing Angle Quotation Mark
+ $trans[chr(140)] = 'Œ'; // Latin Capital Ligature OE
+ $trans[chr(145)] = '‘'; // Left Single Quotation Mark
+ $trans[chr(146)] = '’'; // Right Single Quotation Mark
+ $trans[chr(147)] = '“'; // Left Double Quotation Mark
+ $trans[chr(148)] = '”'; // Right Double Quotation Mark
+ $trans[chr(149)] = '•'; // Bullet
+ $trans[chr(150)] = '–'; // En Dash
+ $trans[chr(151)] = '—'; // Em Dash
+ $trans[chr(152)] = '˜'; // Small Tilde
+ $trans[chr(153)] = '™'; // Trade Mark Sign
+ $trans[chr(154)] = 'š'; // Latin Small Letter S With Caron
+ $trans[chr(155)] = '›'; // Single Right-Pointing Angle Quotation Mark
+ $trans[chr(156)] = 'œ'; // Latin Small Ligature OE
+ $trans[chr(159)] = 'Ÿ'; // Latin Capital Letter Y With Diaeresis
+ $html = strtr($html, $trans);
+ }
+ if (!$encoding) {
+ $encoding = 'utf-8';
+ } else {
+ if (strtolower($encoding) != 'utf-8') {
+ $html = SimplePie_Misc::change_encoding($html, $encoding, 'utf-8');
+ /*
+ if (function_exists('iconv')) {
+ // iconv appears to handle certain character encodings better than mb_convert_encoding
+ $html = iconv($encoding, 'utf-8', $html);
+ } else {
+ $html = mb_convert_encoding($html, 'utf-8', $encoding);
+ }
+ */
+ }
+ }
+ }
+ return $html;
+ }
- if($readability->init())
- {
- $content = $readability->articleContent->innerHTML;
- $parameters['title'] = ($readability->articleTitle->innerHTML != '' ? $readability->articleTitle->innerHTML : _('Untitled'));
- $parameters['content'] = $content;
+ private function makeAbsolute($base, $elem) {
+ $base = new SimplePie_IRI($base);
+ // remove '//' in URL path (used to prevent URLs from resolving properly)
+ // TODO: check if this is still the case
+ if (isset($base->path)) $base->path = preg_replace('!//+!', '/', $base->path);
+ foreach(array('a'=>'href', 'img'=>'src') as $tag => $attr) {
+ $elems = $elem->getElementsByTagName($tag);
+ for ($i = $elems->length-1; $i >= 0; $i--) {
+ $e = $elems->item($i);
+ //$e->parentNode->replaceChild($articleContent->ownerDocument->createTextNode($e->textContent), $e);
+ $this->makeAbsoluteAttr($base, $e, $attr);
+ }
+ if (strtolower($elem->tagName) == $tag) $this->makeAbsoluteAttr($base, $elem, $attr);
+ }
+ }
- return $parameters;
+ private function makeAbsoluteAttr($base, $e, $attr) {
+ if ($e->hasAttribute($attr)) {
+ // Trim leading and trailing white space. I don't really like this but
+ // unfortunately it does appear on some sites. e.g. <img src=" /path/to/image.jpg" />
+ $url = trim(str_replace('%20', ' ', $e->getAttribute($attr)));
+ $url = str_replace(' ', '%20', $url);
+ if (!preg_match('!https?://!i', $url)) {
+ if ($absolute = SimplePie_IRI::absolutize($base, $url)) {
+ $e->setAttribute($attr, $absolute);
}
}
}
- else {
- #$msg->add('e', _('error during url preparation : the link is not valid'));
- Tools::logm($this->getUrl() . ' is not a valid url');
+ }
+
+ private function makeAbsoluteStr($base, $url) {
+ $base = new SimplePie_IRI($base);
+ // remove '//' in URL path (causes URLs not to resolve properly)
+ if (isset($base->path)) $base->path = preg_replace('!//+!', '/', $base->path);
+ if (preg_match('!^https?://!i', $url)) {
+ // already absolute
+ return $url;
+ } else {
+ if ($absolute = SimplePie_IRI::absolutize($base, $url)) {
+ return $absolute;
+ }
+ return false;
}
+ }
- return FALSE;
+ // returns single page response, or false if not found
+ private function getSinglePage($item, $html, $url) {
+ global $http, $extractor;
+ $host = @parse_url($url, PHP_URL_HOST);
+ $site_config = SiteConfig::build($host);
+ if ($site_config === false) {
+ // check for fingerprints
+ if (!empty($extractor->fingerprints) && ($_fphost = $extractor->findHostUsingFingerprints($html))) {
+ $site_config = SiteConfig::build($_fphost);
+ }
+ if ($site_config === false) $site_config = new SiteConfig();
+ SiteConfig::add_to_cache($host, $site_config);
+ return false;
+ } else {
+ SiteConfig::add_to_cache($host, $site_config);
+ }
+ $splink = null;
+ if (!empty($site_config->single_page_link)) {
+ $splink = $site_config->single_page_link;
+ } elseif (!empty($site_config->single_page_link_in_feed)) {
+ // single page link xpath is targeted at feed
+ $splink = $site_config->single_page_link_in_feed;
+ // so let's replace HTML with feed item description
+ $html = $item->get_description();
+ }
+ if (isset($splink)) {
+ // Build DOM tree from HTML
+ $readability = new Readability($html, $url);
+ $xpath = new DOMXPath($readability->dom);
+ // Loop through single_page_link xpath expressions
+ $single_page_url = null;
+ foreach ($splink as $pattern) {
+ $elems = @$xpath->evaluate($pattern, $readability->dom);
+ if (is_string($elems)) {
+ $single_page_url = trim($elems);
+ break;
+ } elseif ($elems instanceof DOMNodeList && $elems->length > 0) {
+ foreach ($elems as $item) {
+ if ($item instanceof DOMElement && $item->hasAttribute('href')) {
+ $single_page_url = $item->getAttribute('href');
+ break;
+ } elseif ($item instanceof DOMAttr && $item->value) {
+ $single_page_url = $item->value;
+ break;
+ }
+ }
+ }
+ }
+ // If we've got URL, resolve against $url
+ if (isset($single_page_url) && ($single_page_url = $this->makeAbsoluteStr($url, $single_page_url))) {
+ // check it's not what we have already!
+ if ($single_page_url != $url) {
+ // it's not, so let's try to fetch it...
+ $_prev_ref = $http->referer;
+ $http->referer = $single_page_url;
+ if (($response = $http->get($single_page_url, true)) && $response['status_code'] < 300) {
+ $http->referer = $_prev_ref;
+ return $response;
+ }
+ $http->referer = $_prev_ref;
+ }
+ }
+ }
+ return false;
}
}
\ No newline at end of file
projects / github / wallabag / wallabag.git / blobdiff