<?php
/**
- * poche, a read it later open source system
+ * wallabag, self hostable application allowing you to not miss any content anymore
*
- * @category poche
- * @author Nicolas Lœuillet <support@inthepoche.com>
+ * @category wallabag
+ * @author Nicolas Lœuillet <nicolas@loeuillet.org>
* @copyright 2013
* @license http://www.wtfpl.net/ see COPYING file
*/
{
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);
public function isCorrect() {
return filter_var($this->url, FILTER_VALIDATE_URL) !== FALSE;
}
-
- 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;
-
- $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);
-
- $feed = new DummySingleItemFeed($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];
-
- // TODO: Allow error codes - some sites return correct content with error status
- // e.g. prospectmagazine.co.uk returns 403
-
- 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, $response['headers']);
-
- // check site config for single page URL - fetch it if found
- if ($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);
-
- 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 $html;
- }
-
- private function makeAbsolute($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, $attr);
- }
- }
-
- private function makeAbsoluteAttr($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, $absolute);
- }
- }
- }
- }
-
- private function makeAbsoluteStr($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 $absolute;
- }
- return false;
- }
- }
-
- // returns single page response, or false if not found
- private function getSinglePage($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
- $readability = new PocheReadability($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