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wallabag/inc/3rdparty/makefulltextfeedHelpers.php
Maryana Rozhankivska 4b842b20ce fix of #486 - import issue
2014-02-24 19:13:54 +02:00

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PHP
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<?php
// Autoloading of classes allows us to include files only when they're
// needed. If we've got a cached copy, for example, only Zend_Cache is loaded.
function autoload($class_name) {
static $dir = null;
if ($dir === null) $dir = dirname(__FILE__).'/libraries/';
static $mapping = array(
// Include FeedCreator for RSS/Atom creation
'FeedWriter' => 'feedwriter/FeedWriter.php',
'FeedItem' => 'feedwriter/FeedItem.php',
// Include ContentExtractor and Readability for identifying and extracting content from URLs
'ContentExtractor' => 'content-extractor/ContentExtractor.php',
'SiteConfig' => 'content-extractor/SiteConfig.php',
'Readability' => 'readability/Readability.php',
// Include Humble HTTP Agent to allow parallel requests and response caching
'HumbleHttpAgent' => 'humble-http-agent/HumbleHttpAgent.php',
'SimplePie_HumbleHttpAgent' => 'humble-http-agent/SimplePie_HumbleHttpAgent.php',
'CookieJar' => 'humble-http-agent/CookieJar.php',
// Include Zend Cache to improve performance (cache results)
'Zend_Cache' => 'Zend/Cache.php',
// Language detect
'Text_LanguageDetect' => 'language-detect/LanguageDetect.php',
// HTML5 Lib
'HTML5_Parser' => 'html5/Parser.php',
// htmLawed - used if XSS filter is enabled (xss_filter)
'htmLawed' => 'htmLawed/htmLawed.php'
);
if (isset($mapping[$class_name])) {
debug("** Loading class $class_name ({$mapping[$class_name]})");
require $dir.$mapping[$class_name];
return true;
} else {
return false;
}
}
spl_autoload_register('autoload');
require dirname(__FILE__).'/libraries/simplepie/autoloader.php';
class DummySingleItemFeed {
public $item;
function __construct($url) { $this->item = new DummySingleItem($url); }
public function get_title() { return ''; }
public function get_description() { return 'Content extracted from '.$this->item->url; }
public function get_link() { return $this->item->url; }
public function get_language() { return false; }
public function get_image_url() { return false; }
public function get_items($start=0, $max=1) { return array(0=>$this->item); }
}
class DummySingleItem {
public $url;
function __construct($url) { $this->url = $url; }
public function get_permalink() { return $this->url; }
public function get_title() { return null; }
public function get_date($format='') { return false; }
public function get_author($key=0) { return null; }
public function get_authors() { return null; }
public function get_description() { return ''; }
public function get_enclosure($key=0, $prefer=null) { return null; }
public function get_enclosures() { return null; }
public function get_categories() { return null; }
}
///////////////////////////////
// HELPER FUNCTIONS
///////////////////////////////
function url_allowed($url) {
global $options;
if (!empty($options->allowed_urls)) {
$allowed = false;
foreach ($options->allowed_urls as $allowurl) {
if (stristr($url, $allowurl) !== false) {
$allowed = true;
break;
}
}
if (!$allowed) return false;
} else {
foreach ($options->blocked_urls as $blockurl) {
if (stristr($url, $blockurl) !== false) {
return false;
}
}
}
return true;
}
//////////////////////////////////////////////
// Convert $html to UTF8
// (uses HTTP headers and HTML to find encoding)
// adapted from http://stackoverflow.com/questions/910793/php-detect-encoding-and-make-everything-utf-8
//////////////////////////////////////////////
function convert_to_utf8($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
debug('Could not find Content-Type header in HTTP 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 50000 characters
// Why 50000? See, for example, http://www.lemonde.fr/festival-de-cannes/article/2012/05/23/deux-cretes-en-goguette-sur-la-croisette_1705732_766360.html
// TODO: improve this so it looks at smaller chunks first
$html_head = substr($html, 0, 50000);
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)] = '&sbquo;'; // Single Low-9 Quotation Mark
$trans[chr(131)] = '&fnof;'; // Latin Small Letter F With Hook
$trans[chr(132)] = '&bdquo;'; // Double Low-9 Quotation Mark
$trans[chr(133)] = '&hellip;'; // Horizontal Ellipsis
$trans[chr(134)] = '&dagger;'; // Dagger
$trans[chr(135)] = '&Dagger;'; // Double Dagger
$trans[chr(136)] = '&circ;'; // Modifier Letter Circumflex Accent
$trans[chr(137)] = '&permil;'; // Per Mille Sign
$trans[chr(138)] = '&Scaron;'; // Latin Capital Letter S With Caron
$trans[chr(139)] = '&lsaquo;'; // Single Left-Pointing Angle Quotation Mark
$trans[chr(140)] = '&OElig;'; // Latin Capital Ligature OE
$trans[chr(145)] = '&lsquo;'; // Left Single Quotation Mark
$trans[chr(146)] = '&rsquo;'; // Right Single Quotation Mark
$trans[chr(147)] = '&ldquo;'; // Left Double Quotation Mark
$trans[chr(148)] = '&rdquo;'; // Right Double Quotation Mark
$trans[chr(149)] = '&bull;'; // Bullet
$trans[chr(150)] = '&ndash;'; // En Dash
$trans[chr(151)] = '&mdash;'; // Em Dash
$trans[chr(152)] = '&tilde;'; // Small Tilde
$trans[chr(153)] = '&trade;'; // Trade Mark Sign
$trans[chr(154)] = '&scaron;'; // Latin Small Letter S With Caron
$trans[chr(155)] = '&rsaquo;'; // Single Right-Pointing Angle Quotation Mark
$trans[chr(156)] = '&oelig;'; // Latin Small Ligature OE
$trans[chr(159)] = '&Yuml;'; // Latin Capital Letter Y With Diaeresis
$html = strtr($html, $trans);
}
if (!$encoding) {
debug('No character encoding found, so treating as UTF-8');
$encoding = 'utf-8';
} else {
debug('Character encoding: '.$encoding);
if (strtolower($encoding) != 'utf-8') {
debug('Converting to 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 $html;
}
function makeAbsolute($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), $e);
makeAbsoluteAttr($base, $e, $attr);
}
if (strtolower($elem->tagName) == $tag) makeAbsoluteAttr($base, $elem, $attr);
}
}
function makeAbsoluteAttr($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, $absolute);
}
}
}
}
function makeAbsoluteStr($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 $absolute;
}
return false;
}
}
// returns single page response, or false if not found
function getSinglePage($item, $html, $url) {
global $http, $extractor;
debug('Looking for site config files to see if single page link exists');
$site_config = $extractor->buildSiteConfig($url, $html);
$splink = null;
if (!empty($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 = $item->getAttribute('href');
break 2;
} elseif ($item instanceof DOMAttr && $item->value) {
$single_page_url = $item->value;
break 2;
}
}
}
}
// If we've got URL, resolve against $url
if (isset($single_page_url) && ($single_page_url = makeAbsoluteStr($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 = $_prev_ref;
}
}
}
return false;
}
// based on content-type http header, decide what to do
// param: HTTP headers string
// return: array with keys: 'mime', 'type', 'subtype', 'action', 'name'
// e.g. array('mime'=>'image/jpeg', 'type'=>'image', 'subtype'=>'jpeg', 'action'=>'link', 'name'=>'Image')
function get_mime_action_info($headers) {
global $options;
// check if action defined for returned Content-Type
$info = array();
if (preg_match('!^Content-Type:\s*(([-\w]+)/([-\w\+]+))!im', $headers, $match)) {
// look for full mime type (e.g. image/jpeg) or just type (e.g. image)
// match[1] = full mime type, e.g. image/jpeg
// match[2] = first part, e.g. image
// match[3] = last part, e.g. jpeg
$info['mime'] = strtolower(trim($match[1]));
$info['type'] = strtolower(trim($match[2]));
$info['subtype'] = strtolower(trim($match[3]));
foreach (array($info['mime'], $info['type']) as $_mime) {
if (isset($options->content_type_exc[$_mime])) {
$info['action'] = $options->content_type_exc[$_mime]['action'];
$info['name'] = $options->content_type_exc[$_mime]['name'];
break;
}
}
}
return $info;
}
function remove_url_cruft($url) {
// remove google analytics for the time being
// regex adapted from http://navitronic.co.uk/2010/12/removing-google-analytics-cruft-from-urls/
// https://gist.github.com/758177
return preg_replace('/(\?|\&)utm_[a-z]+=[^\&]+/', '', $url);
}
function make_substitutions($string) {
if ($string == '') return $string;
global $item, $effective_url;
$string = str_replace('{url}', htmlspecialchars($item->get_permalink()), $string);
$string = str_replace('{effective-url}', htmlspecialchars($effective_url), $string);
return $string;
}
function get_cache() {
global $options, $valid_key;
static $cache = null;
if ($cache === null) {
$frontendOptions = array(
'lifetime' => 10*60, // cache lifetime of 10 minutes
'automatic_serialization' => false,
'write_control' => false,
'automatic_cleaning_factor' => $options->cache_cleanup,
'ignore_user_abort' => false
);
$backendOptions = array(
'cache_dir' => ($valid_key) ? $options->cache_dir.'/rss-with-key/' : $options->cache_dir.'/rss/', // directory where to put the cache files
'file_locking' => false,
'read_control' => true,
'read_control_type' => 'strlen',
'hashed_directory_level' => $options->cache_directory_level,
'hashed_directory_perm' => 0777,
'cache_file_perm' => 0664,
'file_name_prefix' => 'ff'
);
// getting a Zend_Cache_Core object
$cache = Zend_Cache::factory('Core', 'File', $frontendOptions, $backendOptions);
}
return $cache;
}
function debug($msg) {
global $debug_mode;
if ($debug_mode) {
echo '* ',$msg,"\n";
ob_flush();
flush();
}
}
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