From 42c80841c846610be280218d53fcde06b0f0063b Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Nicolas=20L=C5=93uillet?= Date: Fri, 6 Dec 2013 09:45:27 +0100 Subject: [change] we now use Full-Text RSS 3.1, thank you so much @fivefilters --- inc/3rdparty/makefulltextfeed.php | 1195 +++++++++++++++++++++++++++++++++++++ 1 file changed, 1195 insertions(+) create mode 100644 inc/3rdparty/makefulltextfeed.php (limited to 'inc/3rdparty/makefulltextfeed.php') diff --git a/inc/3rdparty/makefulltextfeed.php b/inc/3rdparty/makefulltextfeed.php new file mode 100644 index 00000000..7104bc73 --- /dev/null +++ b/inc/3rdparty/makefulltextfeed.php @@ -0,0 +1,1195 @@ +. +*/ + +// Usage +// ----- +// Request this file passing it your feed in the querystring: makefulltextfeed.php?url=mysite.org +// The following options can be passed in the querystring: +// * URL: url=[feed or website url] (required, should be URL-encoded - in php: urlencode($url)) +// * URL points to HTML (not feed): html=true (optional, by default it's automatically detected) +// * API key: key=[api key] (optional, refer to config.php) +// * Max entries to process: max=[max number of items] (optional) + +error_reporting(E_ALL ^ E_NOTICE); +ini_set("display_errors", 1); +@set_time_limit(120); + +// Deal with magic quotes +if (get_magic_quotes_gpc()) { + $process = array(&$_GET, &$_POST, &$_REQUEST); + while (list($key, $val) = each($process)) { + foreach ($val as $k => $v) { + unset($process[$key][$k]); + if (is_array($v)) { + $process[$key][stripslashes($k)] = $v; + $process[] = &$process[$key][stripslashes($k)]; + } else { + $process[$key][stripslashes($k)] = stripslashes($v); + } + } + } + unset($process); +} + +// set include path +set_include_path(realpath(dirname(__FILE__).'/libraries').PATH_SEPARATOR.get_include_path()); +// Autoloading of classes allows us to include files only when they're +// needed. If we've got a cached copy, for example, only Zend_Cache is loaded. +function autoload($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[$class_name]; + return true; + } else { + return false; + } +} +spl_autoload_register('autoload'); +require dirname(__FILE__).'/libraries/simplepie/autoloader.php'; + +//////////////////////////////// +// Load config file +//////////////////////////////// +require dirname(__FILE__).'/config.php'; + +//////////////////////////////// +// Prevent indexing/following by search engines because: +// 1. The content is already public and presumably indexed (why create duplicates?) +// 2. Not doing so might increase number of requests from search engines, thus increasing server load +// Note: feed readers and services such as Yahoo Pipes will not be affected by this header. +// Note: Using Disallow in a robots.txt file will be more effective (search engines will check +// that before even requesting makefulltextfeed.php). +//////////////////////////////// +header('X-Robots-Tag: noindex, nofollow'); + +//////////////////////////////// +// Check if service is enabled +//////////////////////////////// +if (!$options->enabled) { + die('The full-text RSS service is currently disabled'); +} + +//////////////////////////////// +// Debug mode? +// See the config file for debug options. +//////////////////////////////// +$debug_mode = false; +if (isset($_GET['debug'])) { + if ($options->debug === true || $options->debug == 'user') { + $debug_mode = true; + } elseif ($options->debug == 'admin') { + session_start(); + $debug_mode = (@$_SESSION['auth'] == 1); + } + if ($debug_mode) { + header('Content-Type: text/plain; charset=utf-8'); + } else { + if ($options->debug == 'admin') { + die('You must be logged in to the admin area to see debug output.'); + } else { + die('Debugging is disabled.'); + } + } +} + +//////////////////////////////// +// Check for APC +//////////////////////////////// +$options->apc = $options->apc && function_exists('apc_add'); +if ($options->apc) { + debug('APC is enabled and available on server'); +} else { + debug('APC is disabled or not available on server'); +} + +//////////////////////////////// +// Check for smart cache +//////////////////////////////// +$options->smart_cache = $options->smart_cache && function_exists('apc_inc'); + +//////////////////////////////// +// Check for feed URL +//////////////////////////////// +if (!isset($_GET['url'])) { + die('No URL supplied'); +} +$url = trim($_GET['url']); +if (strtolower(substr($url, 0, 7)) == 'feed://') { + $url = 'http://'.substr($url, 7); +} +if (!preg_match('!^https?://.+!i', $url)) { + $url = 'http://'.$url; +} + +$url = filter_var($url, FILTER_SANITIZE_URL); +$test = filter_var($url, FILTER_VALIDATE_URL, FILTER_FLAG_SCHEME_REQUIRED); +// deal with bug http://bugs.php.net/51192 (present in PHP 5.2.13 and PHP 5.3.2) +if ($test === false) { + $test = filter_var(strtr($url, '-', '_'), FILTER_VALIDATE_URL, FILTER_FLAG_SCHEME_REQUIRED); +} +if ($test !== false && $test !== null && preg_match('!^https?://!', $url)) { + // all okay + unset($test); +} else { + die('Invalid URL supplied'); +} +debug("Supplied URL: $url"); + +///////////////////////////////// +// Redirect to hide API key +///////////////////////////////// +if (isset($_GET['key']) && ($key_index = array_search($_GET['key'], $options->api_keys)) !== false) { + $host = $_SERVER['HTTP_HOST']; + $path = rtrim(dirname($_SERVER['SCRIPT_NAME']), '/\\'); + $_qs_url = (strtolower(substr($url, 0, 7)) == 'http://') ? substr($url, 7) : $url; + $redirect = 'http://'.htmlspecialchars($host.$path).'/makefulltextfeed.php?url='.urlencode($_qs_url); + $redirect .= '&key='.$key_index; + $redirect .= '&hash='.urlencode(sha1($_GET['key'].$url)); + if (isset($_GET['html'])) $redirect .= '&html='.urlencode($_GET['html']); + if (isset($_GET['max'])) $redirect .= '&max='.(int)$_GET['max']; + if (isset($_GET['links'])) $redirect .= '&links='.urlencode($_GET['links']); + if (isset($_GET['exc'])) $redirect .= '&exc='.urlencode($_GET['exc']); + if (isset($_GET['format'])) $redirect .= '&format='.urlencode($_GET['format']); + if (isset($_GET['callback'])) $redirect .= '&callback='.urlencode($_GET['callback']); + if (isset($_GET['l'])) $redirect .= '&l='.urlencode($_GET['l']); + if (isset($_GET['xss'])) $redirect .= '&xss'; + if (isset($_GET['use_extracted_title'])) $redirect .= '&use_extracted_title'; + if (isset($_GET['debug'])) $redirect .= '&debug'; + if ($debug_mode) { + debug('Redirecting to hide access key, follow URL below to continue'); + debug("Location: $redirect"); + } else { + header("Location: $redirect"); + } + exit; +} + +/////////////////////////////////////////////// +// Set timezone. +// Prevents warnings, but needs more testing - +// perhaps if timezone is set in php.ini we +// don't need to set it at all... +/////////////////////////////////////////////// +if (!ini_get('date.timezone') || !@date_default_timezone_set(ini_get('date.timezone'))) { + date_default_timezone_set('UTC'); +} + +/////////////////////////////////////////////// +// Check if the request is explicitly for an HTML page +/////////////////////////////////////////////// +$html_only = (isset($_GET['html']) && ($_GET['html'] == '1' || $_GET['html'] == 'true')); + +/////////////////////////////////////////////// +// Check if valid key supplied +/////////////////////////////////////////////// +$valid_key = false; +if (isset($_GET['key']) && isset($_GET['hash']) && isset($options->api_keys[(int)$_GET['key']])) { + $valid_key = ($_GET['hash'] == sha1($options->api_keys[(int)$_GET['key']].$url)); +} +$key_index = ($valid_key) ? (int)$_GET['key'] : 0; +if (!$valid_key && $options->key_required) { + die('A valid key must be supplied'); +} +if (!$valid_key && isset($_GET['key']) && $_GET['key'] != '') { + die('The entered key is invalid'); +} + +if (file_exists('custom_init.php')) require 'custom_init.php'; + +/////////////////////////////////////////////// +// Check URL against list of blacklisted URLs +/////////////////////////////////////////////// +if (!url_allowed($url)) die('URL blocked'); + +/////////////////////////////////////////////// +// Max entries +// see config.php to find these values +/////////////////////////////////////////////// +if (isset($_GET['max'])) { + $max = (int)$_GET['max']; + if ($valid_key) { + $max = min($max, $options->max_entries_with_key); + } else { + $max = min($max, $options->max_entries); + } +} else { + if ($valid_key) { + $max = $options->default_entries_with_key; + } else { + $max = $options->default_entries; + } +} + +/////////////////////////////////////////////// +// Link handling +/////////////////////////////////////////////// +if (isset($_GET['links']) && in_array($_GET['links'], array('preserve', 'footnotes', 'remove'))) { + $links = $_GET['links']; +} else { + $links = 'preserve'; +} + +/////////////////////////////////////////////// +// Favour item titles in feed? +/////////////////////////////////////////////// +$favour_feed_titles = true; +if ($options->favour_feed_titles == 'user') { + $favour_feed_titles = !isset($_GET['use_extracted_title']); +} else { + $favour_feed_titles = $options->favour_feed_titles; +} + +/////////////////////////////////////////////// +// Exclude items if extraction fails +/////////////////////////////////////////////// +if ($options->exclude_items_on_fail === 'user') { + $exclude_on_fail = (isset($_GET['exc']) && ($_GET['exc'] == '1')); +} else { + $exclude_on_fail = $options->exclude_items_on_fail; +} + +/////////////////////////////////////////////// +// Detect language +/////////////////////////////////////////////// +if ($options->detect_language === 'user') { + if (isset($_GET['l'])) { + $detect_language = (int)$_GET['l']; + } else { + $detect_language = 1; + } +} else { + $detect_language = $options->detect_language; +} + +if ($detect_language >= 2) { + $language_codes = array('albanian' => 'sq','arabic' => 'ar','azeri' => 'az','bengali' => 'bn','bulgarian' => 'bg', + 'cebuano' => 'ceb', // ISO 639-2 + 'croatian' => 'hr','czech' => 'cs','danish' => 'da','dutch' => 'nl','english' => 'en','estonian' => 'et','farsi' => 'fa','finnish' => 'fi','french' => 'fr','german' => 'de','hausa' => 'ha', + 'hawaiian' => 'haw', // ISO 639-2 + 'hindi' => 'hi','hungarian' => 'hu','icelandic' => 'is','indonesian' => 'id','italian' => 'it','kazakh' => 'kk','kyrgyz' => 'ky','latin' => 'la','latvian' => 'lv','lithuanian' => 'lt','macedonian' => 'mk','mongolian' => 'mn','nepali' => 'ne','norwegian' => 'no','pashto' => 'ps', + 'pidgin' => 'cpe', // ISO 639-2 + 'polish' => 'pl','portuguese' => 'pt','romanian' => 'ro','russian' => 'ru','serbian' => 'sr','slovak' => 'sk','slovene' => 'sl','somali' => 'so','spanish' => 'es','swahili' => 'sw','swedish' => 'sv','tagalog' => 'tl','turkish' => 'tr','ukrainian' => 'uk','urdu' => 'ur','uzbek' => 'uz','vietnamese' => 'vi','welsh' => 'cy'); +} +$use_cld = extension_loaded('cld') && (version_compare(PHP_VERSION, '5.3.0') >= 0); + +///////////////////////////////////// +// Check for valid format +// (stick to RSS (or RSS as JSON) for the time being) +///////////////////////////////////// +if (isset($_GET['format']) && $_GET['format'] == 'json') { + $format = 'json'; +} else { + $format = 'rss'; +} + +///////////////////////////////////// +// Should we do XSS filtering? +///////////////////////////////////// +if ($options->xss_filter === 'user') { + $xss_filter = isset($_GET['xss']); +} else { + $xss_filter = $options->xss_filter; +} +if (!$xss_filter && isset($_GET['xss'])) { + die('XSS filtering is disabled in config'); +} + +///////////////////////////////////// +// Check for JSONP +// Regex from https://gist.github.com/1217080 +///////////////////////////////////// +$callback = null; +if ($format =='json' && isset($_GET['callback'])) { + $callback = trim($_GET['callback']); + foreach (explode('.', $callback) as $_identifier) { + if (!preg_match('/^[a-zA-Z_$][0-9a-zA-Z_$]*(?:\[(?:".+"|\'.+\'|\d+)\])*?$/', $_identifier)) { + die('Invalid JSONP callback'); + } + } + debug("JSONP callback: $callback"); +} + +////////////////////////////////// +// Enable Cross-Origin Resource Sharing (CORS) +////////////////////////////////// +if ($options->cors) header('Access-Control-Allow-Origin: *'); + +////////////////////////////////// +// Check for cached copy +////////////////////////////////// +if ($options->caching) { + debug('Caching is enabled...'); + $cache_id = md5($max.$url.$valid_key.$links.$favour_feed_titles.$xss_filter.$exclude_on_fail.$format.$detect_language.(int)isset($_GET['pubsub'])); + $check_cache = true; + if ($options->apc && $options->smart_cache) { + apc_add("cache.$cache_id", 0, 10*60); + $apc_cache_hits = (int)apc_fetch("cache.$cache_id"); + $check_cache = ($apc_cache_hits >= 2); + apc_inc("cache.$cache_id"); + if ($check_cache) { + debug('Cache key found in APC, we\'ll try to load cache file from disk'); + } else { + debug('Cache key not found in APC'); + } + } + if ($check_cache) { + $cache = get_cache(); + if ($data = $cache->load($cache_id)) { + if ($debug_mode) { + debug('Loaded cached copy'); + exit; + } + if ($format == 'json') { + if ($callback === null) { + header('Content-type: application/json; charset=UTF-8'); + } else { + header('Content-type: application/javascript; charset=UTF-8'); + } + } else { + header('Content-type: text/xml; charset=UTF-8'); + header('X-content-type-options: nosniff'); + } + if (headers_sent()) die('Some data has already been output, can\'t send RSS file'); + if ($callback) { + echo "$callback($data);"; + } else { + echo $data; + } + exit; + } + } +} + +////////////////////////////////// +// Set Expires header +////////////////////////////////// +if (!$debug_mode) { + header('Expires: ' . gmdate('D, d M Y H:i:s', time()+(60*10)) . ' GMT'); +} + +////////////////////////////////// +// Set up HTTP agent +////////////////////////////////// +$http = new HumbleHttpAgent(); +$http->debug = $debug_mode; +$http->userAgentMap = $options->user_agents; +$http->headerOnlyTypes = array_keys($options->content_type_exc); +$http->rewriteUrls = $options->rewrite_url; + +////////////////////////////////// +// Set up Content Extractor +////////////////////////////////// +$extractor = new ContentExtractor(dirname(__FILE__).'/site_config/custom', dirname(__FILE__).'/site_config/standard'); +$extractor->debug = $debug_mode; +SiteConfig::$debug = $debug_mode; +SiteConfig::use_apc($options->apc); +$extractor->fingerprints = $options->fingerprints; +$extractor->allowedParsers = $options->allowed_parsers; + +//////////////////////////////// +// Get RSS/Atom feed +//////////////////////////////// +if (!$html_only) { + debug('--------'); + debug("Attempting to process URL as feed"); + // Send user agent header showing PHP (prevents a HTML response from feedburner) + $http->userAgentDefault = HumbleHttpAgent::UA_PHP; + // configure SimplePie HTTP extension class to use our HumbleHttpAgent instance + SimplePie_HumbleHttpAgent::set_agent($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->set_feed_url($url); // colons appearing in the URL's path get encoded + $feed->feed_url = $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(); + //$feed->handle_content_type(); + //$feed->get_title(); + 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 + $http->userAgentDefault = HumbleHttpAgent::UA_BROWSER; +} + +//////////////////////////////////////////////////////////////////////////////// +// Our given URL is not a feed, so let's create our own feed with a single item: +// the given URL. This basically treats all non-feed URLs as if they were +// single-item feeds. +//////////////////////////////////////////////////////////////////////////////// +$isDummyFeed = false; +if ($html_only || !$result) { + debug('--------'); + debug("Constructing a single-item feed from URL"); + $isDummyFeed = true; + unset($feed, $result); + // create single item dummy feed object + 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; } + } + $feed = new DummySingleItemFeed($url); +} + +//////////////////////////////////////////// +// Create full-text feed +//////////////////////////////////////////// +$output = new FeedWriter(); +$output->setTitle(strip_tags($feed->get_title())); +$output->setDescription(strip_tags($feed->get_description())); +$output->setXsl('css/feed.xsl'); // Chrome uses this, most browsers ignore it +if ($valid_key && isset($_GET['pubsub'])) { // used only on fivefilters.org at the moment + $output->addHub('http://fivefilters.superfeedr.com/'); + $output->addHub('http://pubsubhubbub.appspot.com/'); + $output->setSelf('http://'.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI']); +} +$output->setLink($feed->get_link()); // Google Reader uses this for pulling in favicons +if ($img_url = $feed->get_image_url()) { + $output->setImage($feed->get_title(), $feed->get_link(), $img_url); +} + +//////////////////////////////////////////// +// Loop through feed items +//////////////////////////////////////////// +$items = $feed->get_items(0, $max); +// Request all feed items in parallel (if supported) +$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', ':', $permalink); + // validateUrl() strips non-ascii characters + // simplepie already sanitizes URLs so let's not do it again here. + //$permalink = $http->validateUrl($permalink); + if ($permalink) { + $urls_sanitized[] = $permalink; + } + $urls[$key] = $permalink; +} +debug('--------'); +debug('Fetching feed items'); +$http->fetchAll($urls_sanitized); +//$http->cacheAll(); + +// count number of items added to full feed +$item_count = 0; + +foreach ($items as $key => $item) { + debug('--------'); + debug('Processing feed item '.($item_count+1)); + $do_content_extraction = true; + $extract_result = false; + $text_sample = null; + $permalink = $urls[$key]; + debug("Item URL: $permalink"); + $extracted_title = ''; + $feed_item_title = $item->get_title(); + if ($feed_item_title !== null) { + $feed_item_title = strip_tags(htmlspecialchars_decode($feed_item_title)); + } + $newitem = $output->createNewItem(); + $newitem->setTitle($feed_item_title); + if ($valid_key && isset($_GET['pubsub'])) { // used only on fivefilters.org at the moment + if ($permalink !== false) { + $newitem->setLink('http://fivefilters.org/content-only/redirect.php?url='.urlencode($permalink)); + } else { + $newitem->setLink('http://fivefilters.org/content-only/redirect.php?url='.urlencode($item->get_permalink())); + } + } else { + if ($permalink !== false) { + $newitem->setLink($permalink); + } else { + $newitem->setLink($item->get_permalink()); + } + } + //if ($permalink && ($response = $http->get($permalink, true)) && $response['status_code'] < 300) { + // Allowing error codes - some sites return correct content with error status + // e.g. prospectmagazine.co.uk returns 403 + if ($permalink && ($response = $http->get($permalink, true)) && ($response['status_code'] < 300 || $response['status_code'] > 400)) { + $effective_url = $response['effective_url']; + if (!url_allowed($effective_url)) continue; + // check if action defined for returned Content-Type + $mime_info = get_mime_action_info($response['headers']); + if (isset($mime_info['action'])) { + if ($mime_info['action'] == 'exclude') { + continue; // skip this feed item entry + } elseif ($mime_info['action'] == 'link') { + if ($mime_info['type'] == 'image') { + $html = "\"{$mime_info['name']}\""; + } else { + $html = "Download {$mime_info['name']}"; + } + $extracted_title = $mime_info['name']; + $do_content_extraction = false; + } + } + if ($do_content_extraction) { + $html = $response['body']; + // remove strange things + $html = str_replace('', '', $html); + $html = convert_to_utf8($html, $response['headers']); + // check site config for single page URL - fetch it if found + $is_single_page = false; + if ($single_page_response = getSinglePage($item, $html, $effective_url)) { + $is_single_page = true; + $html = $single_page_response['body']; + // remove strange things + $html = str_replace('', '', $html); + $html = convert_to_utf8($html, $single_page_response['headers']); + $effective_url = $single_page_response['effective_url']; + debug("Retrieved single-page view from $effective_url"); + unset($single_page_response); + } + debug('--------'); + debug('Attempting to extract content'); + $extract_result = $extractor->process($html, $effective_url); + $readability = $extractor->readability; + $content_block = ($extract_result) ? $extractor->getContent() : null; + $extracted_title = ($extract_result) ? $extractor->getTitle() : ''; + // Deal with multi-page articles + //die('Next: '.$extractor->getNextPageUrl()); + $is_multi_page = (!$is_single_page && $extract_result && $extractor->getNextPageUrl()); + if ($options->multipage && $is_multi_page) { + debug('--------'); + debug('Attempting to process multi-page article'); + $multi_page_urls = array(); + $multi_page_content = array(); + while ($next_page_url = $extractor->getNextPageUrl()) { + debug('--------'); + debug('Processing next page: '.$next_page_url); + // If we've got URL, resolve against $url + if ($next_page_url = makeAbsoluteStr($effective_url, $next_page_url)) { + // check it's not what we have already! + if (!in_array($next_page_url, $multi_page_urls)) { + // it's not, so let's attempt to fetch it + $multi_page_urls[] = $next_page_url; + $_prev_ref = $http->referer; + if (($response = $http->get($next_page_url, true)) && $response['status_code'] < 300) { + // make sure mime type is not something with a different action associated + $page_mime_info = get_mime_action_info($response['headers']); + if (!isset($page_mime_info['action'])) { + $html = $response['body']; + // remove strange things + $html = str_replace('', '', $html); + $html = convert_to_utf8($html, $response['headers']); + if ($extractor->process($html, $next_page_url)) { + $multi_page_content[] = $extractor->getContent(); + continue; + } else { debug('Failed to extract content'); } + } else { debug('MIME type requires different action'); } + } else { debug('Failed to fetch URL'); } + } else { debug('URL already processed'); } + } else { debug('Failed to resolve against '.$effective_url); } + // failed to process next_page_url, so cancel further requests + $multi_page_content = array(); + break; + } + // did we successfully deal with this multi-page article? + if (empty($multi_page_content)) { + debug('Failed to extract all parts of multi-page article, so not going to include them'); + $multi_page_content[] = $readability->dom->createElement('p')->innerHTML = 'This article appears to continue on subsequent pages which we could not extract'; + } + foreach ($multi_page_content as $_page) { + $_page = $content_block->ownerDocument->importNode($_page, true); + $content_block->appendChild($_page); + } + unset($multi_page_urls, $multi_page_content, $page_mime_info, $next_page_url); + } + } + // use extracted title for both feed and item title if we're using single-item dummy feed + if ($isDummyFeed) { + $output->setTitle($extracted_title); + $newitem->setTitle($extracted_title); + } else { + // use extracted title instead of feed item title? + if (!$favour_feed_titles && $extracted_title != '') { + debug('Using extracted title in generated feed'); + $newitem->setTitle($extracted_title); + } + } + } + if ($do_content_extraction) { + // if we failed to extract content... + if (!$extract_result) { + if ($exclude_on_fail) { + debug('Failed to extract, so skipping (due to exclude on fail parameter)'); + continue; // skip this and move to next item + } + //TODO: get text sample for language detection + $html = $options->error_message; + // keep the original item description + $html .= $item->get_description(); + } else { + $readability->clean($content_block, 'select'); + if ($options->rewrite_relative_urls) makeAbsolute($effective_url, $content_block); + // footnotes + if (($links == 'footnotes') && (strpos($effective_url, 'wikipedia.org') === false)) { + $readability->addFootnotes($content_block); + } + // remove nesting:

test

=

test

+ while ($content_block->childNodes->length == 1 && $content_block->firstChild->nodeType === XML_ELEMENT_NODE) { + // only follow these tag names + if (!in_array(strtolower($content_block->tagName), array('div', 'article', 'section', 'header', 'footer'))) break; + //$html = $content_block->firstChild->innerHTML; // FTR 2.9.5 + $content_block = $content_block->firstChild; + } + // convert content block to HTML string + // Need to preserve things like body: //img[@id='feature'] + if (in_array(strtolower($content_block->tagName), array('div', 'article', 'section', 'header', 'footer'))) { + $html = $content_block->innerHTML; + } else { + $html = $content_block->ownerDocument->saveXML($content_block); // essentially outerHTML + } + unset($content_block); + // post-processing cleanup + $html = preg_replace('!

[\s\h\v]*

!u', '', $html); + if ($links == 'remove') { + $html = preg_replace('!]*>!', '', $html); + } + // get text sample for language detection + $text_sample = strip_tags(substr($html, 0, 500)); + $html = make_substitutions($options->message_to_prepend).$html; + $html .= make_substitutions($options->message_to_append); + } + } + + if ($valid_key && isset($_GET['pubsub'])) { // used only on fivefilters.org at the moment + $newitem->addElement('guid', 'http://fivefilters.org/content-only/redirect.php?url='.urlencode($item->get_permalink()), array('isPermaLink'=>'false')); + } else { + $newitem->addElement('guid', $item->get_permalink(), array('isPermaLink'=>'true')); + } + // filter xss? + if ($xss_filter) { + debug('Filtering HTML to remove XSS'); + $html = htmLawed::hl($html, array('safe'=>1, 'deny_attribute'=>'style', 'comment'=>1, 'cdata'=>1)); + } + $newitem->setDescription($html); + + // set date + if ((int)$item->get_date('U') > 0) { + $newitem->setDate((int)$item->get_date('U')); + } elseif ($extractor->getDate()) { + $newitem->setDate($extractor->getDate()); + } + + // add authors + if ($authors = $item->get_authors()) { + foreach ($authors as $author) { + // for some feeds, SimplePie stores author's name as email, e.g. http://feeds.feedburner.com/nymag/intel + if ($author->get_name() !== null) { + $newitem->addElement('dc:creator', $author->get_name()); + } elseif ($author->get_email() !== null) { + $newitem->addElement('dc:creator', $author->get_email()); + } + } + } elseif ($authors = $extractor->getAuthors()) { + //TODO: make sure the list size is reasonable + foreach ($authors as $author) { + // TODO: xpath often selects authors from other articles linked from the page. + // for now choose first item + $newitem->addElement('dc:creator', $author); + break; + } + } + + // add language + if ($detect_language) { + $language = $extractor->getLanguage(); + if (!$language) $language = $feed->get_language(); + if (($detect_language == 3 || (!$language && $detect_language == 2)) && $text_sample) { + try { + if ($use_cld) { + // Use PHP-CLD extension + $php_cld = 'CLD\detect'; // in quotes to prevent PHP 5.2 parse error + $res = $php_cld($text_sample); + if (is_array($res) && count($res) > 0) { + $language = $res[0]['code']; + } + } else { + //die('what'); + // Use PEAR's Text_LanguageDetect + if (!isset($l)) { + $l = new Text_LanguageDetect('libraries/language-detect/lang.dat', 'libraries/language-detect/unicode_blocks.dat'); + } + $l_result = $l->detect($text_sample, 1); + if (count($l_result) > 0) { + $language = $language_codes[key($l_result)]; + } + } + } catch (Exception $e) { + //die('error: '.$e); + // do nothing + } + } + if ($language && (strlen($language) < 7)) { + $newitem->addElement('dc:language', $language); + } + } + + // add MIME type (if it appeared in our exclusions lists) + if (isset($mime_info['mime'])) $newitem->addElement('dc:format', $mime_info['mime']); + // add effective URL (URL after redirects) + if (isset($effective_url)) { + //TODO: ensure $effective_url is valid witout - sometimes it causes problems, e.g. + //http://www.siasat.pk/forum/showthread.php?108883-Pakistan-Chowk-by-Rana-Mubashir-–-25th-March-2012-Special-Program-from-Liari-(Karachi) + //temporary measure: use utf8_encode() + $newitem->addElement('dc:identifier', remove_url_cruft(utf8_encode($effective_url))); + } else { + $newitem->addElement('dc:identifier', remove_url_cruft($item->get_permalink())); + } + + // add categories + if ($categories = $item->get_categories()) { + foreach ($categories as $category) { + if ($category->get_label() !== null) { + $newitem->addElement('category', $category->get_label()); + } + } + } + + // check for enclosures + if ($options->keep_enclosures) { + if ($enclosures = $item->get_enclosures()) { + foreach ($enclosures as $enclosure) { + // thumbnails + foreach ((array)$enclosure->get_thumbnails() as $thumbnail) { + $newitem->addElement('media:thumbnail', '', array('url'=>$thumbnail)); + } + if (!$enclosure->get_link()) continue; + $enc = array(); + // Media RSS spec ($enc): http://search.yahoo.com/mrss + // SimplePie methods ($enclosure): http://simplepie.org/wiki/reference/start#methods4 + $enc['url'] = $enclosure->get_link(); + if ($enclosure->get_length()) $enc['fileSize'] = $enclosure->get_length(); + if ($enclosure->get_type()) $enc['type'] = $enclosure->get_type(); + if ($enclosure->get_medium()) $enc['medium'] = $enclosure->get_medium(); + if ($enclosure->get_expression()) $enc['expression'] = $enclosure->get_expression(); + if ($enclosure->get_bitrate()) $enc['bitrate'] = $enclosure->get_bitrate(); + if ($enclosure->get_framerate()) $enc['framerate'] = $enclosure->get_framerate(); + if ($enclosure->get_sampling_rate()) $enc['samplingrate'] = $enclosure->get_sampling_rate(); + if ($enclosure->get_channels()) $enc['channels'] = $enclosure->get_channels(); + if ($enclosure->get_duration()) $enc['duration'] = $enclosure->get_duration(); + if ($enclosure->get_height()) $enc['height'] = $enclosure->get_height(); + if ($enclosure->get_width()) $enc['width'] = $enclosure->get_width(); + if ($enclosure->get_language()) $enc['lang'] = $enclosure->get_language(); + $newitem->addElement('media:content', '', $enc); + } + } + } + /* } */ + $output->addItem($newitem); + unset($html); + $item_count++; +} + +// output feed +debug('Done!'); +/* +if ($debug_mode) { + $_apc_data = apc_cache_info('user'); + var_dump($_apc_data); exit; +} +*/ +if (!$debug_mode) { + if ($callback) echo "$callback("; // if $callback is set, $format also == 'json' + if ($format == 'json') $output->setFormat(($callback === null) ? JSON : JSONP); + $add_to_cache = $options->caching; + // is smart cache mode enabled? + if ($add_to_cache && $options->apc && $options->smart_cache) { + // yes, so only cache if this is the second request for this URL + $add_to_cache = ($apc_cache_hits >= 2); + // purge cache + if ($options->cache_cleanup > 0) { + if (rand(1, $options->cache_cleanup) == 1) { + // apc purge code adapted from from http://www.thimbleopensource.com/tutorials-snippets/php-apc-expunge-script + $_apc_data = apc_cache_info('user'); + foreach ($_apc_data['cache_list'] as $_apc_item) { + if ($_apc_item['ttl'] > 0 && ($_apc_item['ttl'] + $_apc_item['creation_time'] < time())) { + apc_delete($_apc_item['info']); + } + } + } + } + } + if ($add_to_cache) { + ob_start(); + $output->genarateFeed(); + $output = ob_get_contents(); + ob_end_clean(); + if ($html_only && $item_count == 0) { + // do not cache - in case of temporary server glitch at source URL + } else { + $cache = get_cache(); + if ($add_to_cache) $cache->save($output, $cache_id); + } + echo $output; + } else { + $output->genarateFeed(); + } + if ($callback) echo ');'; +} + +/////////////////////////////// +// 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('/]+)/i', $html_head, $match)) { + $encoding = trim($match[1]); + } elseif (preg_match_all('/]+)>/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) { + 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. + $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(); + } +} \ No newline at end of file -- cgit v1.2.3