mirror of
https://github.com/wallabag/wallabag.git
synced 2024-12-04 23:06:27 +00:00
389 lines
15 KiB
PHP
Executable file
389 lines
15 KiB
PHP
Executable file
<?php
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// Autoloading of classes allows us to include files only when they're
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// needed. If we've got a cached copy, for example, only Zend_Cache is loaded.
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function autoload($class_name) {
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static $dir = null;
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if ($dir === null) $dir = dirname(__FILE__).'/libraries/';
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static $mapping = array(
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// Include FeedCreator for RSS/Atom creation
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'FeedWriter' => 'feedwriter/FeedWriter.php',
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'FeedItem' => 'feedwriter/FeedItem.php',
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// Include ContentExtractor and Readability for identifying and extracting content from URLs
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'ContentExtractor' => 'content-extractor/ContentExtractor.php',
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'SiteConfig' => 'content-extractor/SiteConfig.php',
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'Readability' => 'readability/Readability.php',
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// Include Humble HTTP Agent to allow parallel requests and response caching
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'HumbleHttpAgent' => 'humble-http-agent/HumbleHttpAgent.php',
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'SimplePie_HumbleHttpAgent' => 'humble-http-agent/SimplePie_HumbleHttpAgent.php',
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'CookieJar' => 'humble-http-agent/CookieJar.php',
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// Include Zend Cache to improve performance (cache results)
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'Zend_Cache' => 'Zend/Cache.php',
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// Language detect
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'Text_LanguageDetect' => 'language-detect/LanguageDetect.php',
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// HTML5 Lib
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'HTML5_Parser' => 'html5/Parser.php',
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// htmLawed - used if XSS filter is enabled (xss_filter)
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'htmLawed' => 'htmLawed/htmLawed.php'
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);
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if (isset($mapping[$class_name])) {
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debug("** Loading class $class_name ({$mapping[$class_name]})");
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require $dir.$mapping[$class_name];
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return true;
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} else {
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return false;
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}
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}
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spl_autoload_register('autoload');
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require dirname(__FILE__).'/libraries/simplepie/autoloader.php';
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class DummySingleItemFeed {
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public $item;
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function __construct($url) { $this->item = new DummySingleItem($url); }
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public function get_title() { return ''; }
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public function get_description() { return 'Content extracted from '.$this->item->url; }
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public function get_link() { return $this->item->url; }
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public function get_language() { return false; }
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public function get_image_url() { return false; }
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public function get_items($start=0, $max=1) { return array(0=>$this->item); }
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}
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class DummySingleItem {
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public $url;
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function __construct($url) { $this->url = $url; }
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public function get_permalink() { return $this->url; }
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public function get_title() { return null; }
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public function get_date($format='') { return false; }
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public function get_author($key=0) { return null; }
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public function get_authors() { return null; }
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public function get_description() { return ''; }
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public function get_enclosure($key=0, $prefer=null) { return null; }
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public function get_enclosures() { return null; }
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public function get_categories() { return null; }
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}
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///////////////////////////////
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// HELPER FUNCTIONS
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///////////////////////////////
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// Adapted from WordPress
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// http://core.trac.wordpress.org/browser/tags/3.5.1/wp-includes/formatting.php#L2173
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function get_excerpt($text, $num_words=55, $more=null) {
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if (null === $more) $more = '…';
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$text = strip_tags($text);
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//TODO: Check if word count is based on single characters (East Asian characters)
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/*
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if (1==2) {
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$text = trim(preg_replace("/[\n\r\t ]+/", ' ', $text), ' ');
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preg_match_all('/./u', $text, $words_array);
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$words_array = array_slice($words_array[0], 0, $num_words + 1);
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$sep = '';
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} else {
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$words_array = preg_split("/[\n\r\t ]+/", $text, $num_words + 1, PREG_SPLIT_NO_EMPTY);
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$sep = ' ';
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}
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*/
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$words_array = preg_split("/[\n\r\t ]+/", $text, $num_words + 1, PREG_SPLIT_NO_EMPTY);
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$sep = ' ';
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if (count($words_array) > $num_words) {
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array_pop($words_array);
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$text = implode($sep, $words_array);
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$text = $text.$more;
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} else {
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$text = implode($sep, $words_array);
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}
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// trim whitespace at beginning or end of string
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// See: http://stackoverflow.com/questions/4166896/trim-unicode-whitespace-in-php-5-2
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$text = preg_replace('/^[\pZ\pC]+|[\pZ\pC]+$/u', '', $text);
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return $text;
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}
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function url_allowed($url) {
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global $options;
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if (!empty($options->allowed_urls)) {
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$allowed = false;
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foreach ($options->allowed_urls as $allowurl) {
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if (stristr($url, $allowurl) !== false) {
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$allowed = true;
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break;
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}
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}
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if (!$allowed) return false;
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} else {
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foreach ($options->blocked_urls as $blockurl) {
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if (stristr($url, $blockurl) !== false) {
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return false;
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}
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}
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}
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return true;
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}
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//////////////////////////////////////////////
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// Convert $html to UTF8
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// (uses HTTP headers and HTML to find encoding)
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// adapted from http://stackoverflow.com/questions/910793/php-detect-encoding-and-make-everything-utf-8
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//////////////////////////////////////////////
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function convert_to_utf8($html, $header=null)
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{
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$encoding = null;
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if ($html || $header) {
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if (is_array($header)) $header = implode("\n", $header);
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if (!$header || !preg_match_all('/^Content-Type:\s+([^;]+)(?:;\s*charset=["\']?([^;"\'\n]*))?/im', $header, $match, PREG_SET_ORDER)) {
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// error parsing the response
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debug('Could not find Content-Type header in HTTP response');
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} else {
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$match = end($match); // get last matched element (in case of redirects)
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if (isset($match[2])) $encoding = trim($match[2], "\"' \r\n\0\x0B\t");
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}
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// TODO: check to see if encoding is supported (can we convert it?)
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// If it's not, result will be empty string.
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// For now we'll check for invalid encoding types returned by some sites, e.g. 'none'
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// Problem URL: http://facta.co.jp/blog/archives/20111026001026.html
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if (!$encoding || $encoding == 'none') {
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// search for encoding in HTML - only look at the first 50000 characters
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// Why 50000? See, for example, http://www.lemonde.fr/festival-de-cannes/article/2012/05/23/deux-cretes-en-goguette-sur-la-croisette_1705732_766360.html
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// TODO: improve this so it looks at smaller chunks first
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$html_head = substr($html, 0, 50000);
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if (preg_match('/^<\?xml\s+version=(?:"[^"]*"|\'[^\']*\')\s+encoding=("[^"]*"|\'[^\']*\')/s', $html_head, $match)) {
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$encoding = trim($match[1], '"\'');
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} elseif (preg_match('/<meta\s+http-equiv=["\']?Content-Type["\']? content=["\'][^;]+;\s*charset=["\']?([^;"\'>]+)/i', $html_head, $match)) {
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$encoding = trim($match[1]);
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} elseif (preg_match_all('/<meta\s+([^>]+)>/i', $html_head, $match)) {
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foreach ($match[1] as $_test) {
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if (preg_match('/charset=["\']?([^"\']+)/i', $_test, $_m)) {
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$encoding = trim($_m[1]);
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break;
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}
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}
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}
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}
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if (isset($encoding)) $encoding = trim($encoding);
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// trim is important here!
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if (!$encoding || (strtolower($encoding) == 'iso-8859-1')) {
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// replace MS Word smart qutoes
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$trans = array();
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$trans[chr(130)] = '‚'; // Single Low-9 Quotation Mark
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$trans[chr(131)] = 'ƒ'; // Latin Small Letter F With Hook
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$trans[chr(132)] = '„'; // Double Low-9 Quotation Mark
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$trans[chr(133)] = '…'; // Horizontal Ellipsis
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$trans[chr(134)] = '†'; // Dagger
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$trans[chr(135)] = '‡'; // Double Dagger
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$trans[chr(136)] = 'ˆ'; // Modifier Letter Circumflex Accent
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$trans[chr(137)] = '‰'; // Per Mille Sign
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$trans[chr(138)] = 'Š'; // Latin Capital Letter S With Caron
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$trans[chr(139)] = '‹'; // Single Left-Pointing Angle Quotation Mark
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$trans[chr(140)] = 'Œ'; // Latin Capital Ligature OE
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$trans[chr(145)] = '‘'; // Left Single Quotation Mark
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$trans[chr(146)] = '’'; // Right Single Quotation Mark
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$trans[chr(147)] = '“'; // Left Double Quotation Mark
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$trans[chr(148)] = '”'; // Right Double Quotation Mark
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$trans[chr(149)] = '•'; // Bullet
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$trans[chr(150)] = '–'; // En Dash
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$trans[chr(151)] = '—'; // Em Dash
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$trans[chr(152)] = '˜'; // Small Tilde
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$trans[chr(153)] = '™'; // Trade Mark Sign
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$trans[chr(154)] = 'š'; // Latin Small Letter S With Caron
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$trans[chr(155)] = '›'; // Single Right-Pointing Angle Quotation Mark
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$trans[chr(156)] = 'œ'; // Latin Small Ligature OE
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$trans[chr(159)] = 'Ÿ'; // Latin Capital Letter Y With Diaeresis
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$html = strtr($html, $trans);
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}
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if (!$encoding) {
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debug('No character encoding found, so treating as UTF-8');
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$encoding = 'utf-8';
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} else {
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debug('Character encoding: '.$encoding);
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if (strtolower($encoding) != 'utf-8') {
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debug('Converting to UTF-8');
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$html = SimplePie_Misc::change_encoding($html, $encoding, 'utf-8');
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}
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}
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}
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return $html;
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}
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function makeAbsolute($base, $elem) {
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$base = new SimplePie_IRI($base);
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// remove '//' in URL path (used to prevent URLs from resolving properly)
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// TODO: check if this is still the case
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if (isset($base->path)) $base->path = preg_replace('!//+!', '/', $base->path);
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foreach(array('a'=>'href', 'img'=>'src') as $tag => $attr) {
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$elems = $elem->getElementsByTagName($tag);
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for ($i = $elems->length-1; $i >= 0; $i--) {
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$e = $elems->item($i);
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//$e->parentNode->replaceChild($articleContent->ownerDocument->createTextNode($e->textContent), $e);
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makeAbsoluteAttr($base, $e, $attr);
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}
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if (strtolower($elem->tagName) == $tag) makeAbsoluteAttr($base, $elem, $attr);
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}
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}
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function makeAbsoluteAttr($base, $e, $attr) {
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if ($e->hasAttribute($attr)) {
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// Trim leading and trailing white space. I don't really like this but
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// unfortunately it does appear on some sites. e.g. <img src=" /path/to/image.jpg" />
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$url = trim(str_replace('%20', ' ', $e->getAttribute($attr)));
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$url = str_replace(' ', '%20', $url);
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if (!preg_match('!https?://!i', $url)) {
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if ($absolute = SimplePie_IRI::absolutize($base, $url)) {
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$e->setAttribute($attr, $absolute);
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}
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}
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}
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}
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function makeAbsoluteStr($base, $url) {
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$base = new SimplePie_IRI($base);
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// remove '//' in URL path (causes URLs not to resolve properly)
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if (isset($base->path)) $base->path = preg_replace('!//+!', '/', $base->path);
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if (preg_match('!^https?://!i', $url)) {
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// already absolute
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return $url;
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} else {
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if ($absolute = SimplePie_IRI::absolutize($base, $url)) {
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return $absolute;
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}
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return false;
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}
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}
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// returns single page response, or false if not found
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function getSinglePage($item, $html, $url) {
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global $http, $extractor;
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debug('Looking for site config files to see if single page link exists');
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$site_config = $extractor->buildSiteConfig($url, $html);
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$splink = null;
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if (!empty($site_config->single_page_link)) {
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$splink = $site_config->single_page_link;
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} elseif (!empty($site_config->single_page_link_in_feed)) {
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// single page link xpath is targeted at feed
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$splink = $site_config->single_page_link_in_feed;
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// so let's replace HTML with feed item description
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$html = $item->get_description();
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}
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if (isset($splink)) {
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// Build DOM tree from HTML
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$readability = new Readability($html, $url);
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$xpath = new DOMXPath($readability->dom);
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// Loop through single_page_link xpath expressions
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$single_page_url = null;
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foreach ($splink as $pattern) {
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$elems = @$xpath->evaluate($pattern, $readability->dom);
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if (is_string($elems)) {
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$single_page_url = trim($elems);
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break;
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} elseif ($elems instanceof DOMNodeList && $elems->length > 0) {
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foreach ($elems as $item) {
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if ($item instanceof DOMElement && $item->hasAttribute('href')) {
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$single_page_url = $item->getAttribute('href');
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break 2;
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} elseif ($item instanceof DOMAttr && $item->value) {
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$single_page_url = $item->value;
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break 2;
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}
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}
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}
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}
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// If we've got URL, resolve against $url
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if (isset($single_page_url) && ($single_page_url = makeAbsoluteStr($url, $single_page_url))) {
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// check it's not what we have already!
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if ($single_page_url != $url) {
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// it's not, so let's try to fetch it...
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$_prev_ref = $http->referer;
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$http->referer = $single_page_url;
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if (($response = $http->get($single_page_url, true)) && $response['status_code'] < 300) {
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$http->referer = $_prev_ref;
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return $response;
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}
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$http->referer = $_prev_ref;
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}
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}
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}
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return false;
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}
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// based on content-type http header, decide what to do
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// param: HTTP headers string
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// return: array with keys: 'mime', 'type', 'subtype', 'action', 'name'
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// e.g. array('mime'=>'image/jpeg', 'type'=>'image', 'subtype'=>'jpeg', 'action'=>'link', 'name'=>'Image')
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function get_mime_action_info($headers) {
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global $options;
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// check if action defined for returned Content-Type
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$info = array();
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if (preg_match('!^Content-Type:\s*(([-\w]+)/([-\w\+]+))!im', $headers, $match)) {
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// look for full mime type (e.g. image/jpeg) or just type (e.g. image)
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// match[1] = full mime type, e.g. image/jpeg
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// match[2] = first part, e.g. image
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// match[3] = last part, e.g. jpeg
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$info['mime'] = strtolower(trim($match[1]));
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$info['type'] = strtolower(trim($match[2]));
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$info['subtype'] = strtolower(trim($match[3]));
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foreach (array($info['mime'], $info['type']) as $_mime) {
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if (isset($options->content_type_exc[$_mime])) {
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$info['action'] = $options->content_type_exc[$_mime]['action'];
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$info['name'] = $options->content_type_exc[$_mime]['name'];
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break;
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}
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}
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}
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return $info;
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}
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function remove_url_cruft($url) {
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// remove google analytics for the time being
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// regex adapted from http://navitronic.co.uk/2010/12/removing-google-analytics-cruft-from-urls/
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// https://gist.github.com/758177
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return preg_replace('/(\?|\&)utm_[a-z]+=[^\&]+/', '', $url);
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}
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function make_substitutions($string) {
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if ($string == '') return $string;
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global $item, $effective_url;
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$string = str_replace('{url}', htmlspecialchars($item->get_permalink()), $string);
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$string = str_replace('{effective-url}', htmlspecialchars($effective_url), $string);
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return $string;
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}
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function get_cache() {
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global $options, $valid_key;
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static $cache = null;
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if ($cache === null) {
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$frontendOptions = array(
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'lifetime' => 10*60, // cache lifetime of 10 minutes
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'automatic_serialization' => false,
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'write_control' => false,
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'automatic_cleaning_factor' => $options->cache_cleanup,
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'ignore_user_abort' => false
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);
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$backendOptions = array(
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'cache_dir' => ($valid_key) ? $options->cache_dir.'/rss-with-key/' : $options->cache_dir.'/rss/', // directory where to put the cache files
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'file_locking' => false,
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'read_control' => true,
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'read_control_type' => 'strlen',
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'hashed_directory_level' => $options->cache_directory_level,
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'hashed_directory_perm' => 0777,
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'cache_file_perm' => 0664,
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'file_name_prefix' => 'ff'
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);
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// getting a Zend_Cache_Core object
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$cache = Zend_Cache::factory('Core', 'File', $frontendOptions, $backendOptions);
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}
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return $cache;
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}
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function debug($msg) {
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global $debug_mode;
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if ($debug_mode) {
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echo '* ',$msg,"\n";
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ob_flush();
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flush();
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}
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}
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function get_base_url($dom) {
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$xpath = new DOMXPath($dom);
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$base_url = @$xpath->evaluate('string(//head/base/@href)', $dom);
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if ($base_url !== '') {
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return $base_url;
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} else {
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return false;
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}
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}
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