mirror of
https://github.com/wallabag/wallabag.git
synced 2024-06-10 09:19:28 +00:00
395 lines
19 KiB
PHP
395 lines
19 KiB
PHP
<?php
|
|
/**
|
|
* poche, a read it later open source system
|
|
*
|
|
* @category poche
|
|
* @author Nicolas Lœuillet <support@inthepoche.com>
|
|
* @copyright 2013
|
|
* @license http://www.wtfpl.net/ see COPYING file
|
|
*/
|
|
|
|
class Url
|
|
{
|
|
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 getUrl() {
|
|
return $this->url;
|
|
}
|
|
|
|
public function setUrl($url) {
|
|
$this->url = $url;
|
|
}
|
|
|
|
public function isCorrect() {
|
|
return filter_var($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
|
|
$readability = new Readability($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;
|
|
}
|
|
} |