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makefulltextfeed.php
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<?php
// Full-Text RSS: Create Full-Text Feeds
// Author: Keyvan Minoukadeh
// Copyright (c) 2017 Keyvan Minoukadeh
// License: AGPLv3
// Version: 3.8
// Date: 2017-09-25
// More info: http://fivefilters.org/content-only/
// Help: http://help.fivefilters.org
/*
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
// Usage
// -----
// Request this file passing it a web page or feed URL in the querystring: makefulltextfeed.php?url=example.org/article
// For more request parameters, see http://help.fivefilters.org/customer/portal/articles/226660-usage
error_reporting(E_ALL ^ E_NOTICE);
libxml_use_internal_errors(true);
libxml_disable_entity_loader(true);
ini_set("display_errors", 1);
@set_time_limit(120);
if (!defined('_FF_FTR_MODE')) define('_FF_FTR_MODE', 'full');
if (_FF_FTR_MODE === 'simple') {
$_REQUEST = array_merge($_GET, $_POST);
} else {
$_REQUEST = $_GET;
}
// set include path
set_include_path(realpath(dirname(__FILE__).'/libraries').PATH_SEPARATOR.get_include_path());
// Autoloading of classes allows us to include files only when they're
// needed. If we've got a cached copy, for example, only Zend_Cache is loaded.
function autoload($class_name) {
static $dir = null;
if ($dir === null) $dir = dirname(__FILE__).'/libraries/';
static $mapping = array(
// Include FeedCreator for RSS/Atom creation
'FeedWriter' => 'feedwriter/FeedWriter.php',
'FeedItem' => 'feedwriter/FeedItem.php',
// Include ContentExtractor and Readability for identifying and extracting content from URLs
'ContentExtractor' => 'content-extractor/ContentExtractor.php',
'SiteConfig' => 'content-extractor/SiteConfig.php',
'Readability' => 'readability/Readability.php',
// Include Humble HTTP Agent to allow parallel requests and response caching
'HumbleHttpAgent' => 'humble-http-agent/HumbleHttpAgent.php',
'SimplePie_HumbleHttpAgent' => 'humble-http-agent/SimplePie_HumbleHttpAgent.php',
'CookieJar' => 'humble-http-agent/CookieJar.php',
'HumbleHttpAgentDummy' => 'humble-http-agent/HumbleHttpAgentDummy.php',
// Include Zend Cache to improve performance (cache results)
'Zend_Cache' => 'Zend/Cache.php',
// Language detect
'Text_LanguageDetect' => 'language-detect/LanguageDetect.php',
// HTML5 PHP (can't be used unless PHP version is >= 5.3)
'Masterminds\HTML5' => 'html5php/HTML5.php',
// htmLawed - used if XSS filter is enabled (xss_filter)
'htmLawed' => 'htmLawed/htmLawed.php',
// Disable SimplePie sanitization
'DisableSimplePieSanitize' => 'DisableSimplePieSanitize.php'
);
if (isset($mapping[$class_name])) {
debug("** Loading class $class_name ({$mapping[$class_name]})");
require $dir.$mapping[$class_name];
return true;
} else {
return false;
}
}
spl_autoload_register('autoload');
require dirname(__FILE__).'/libraries/simplepie/autoloader.php';
require dirname(__FILE__).'/libraries/html5php/autoloader.php';
////////////////////////////////
// Load config file
////////////////////////////////
require dirname(__FILE__).'/config.php';
////////////////////////////////
// Prevent indexing/following by search engines because:
// 1. The content is already public and presumably indexed (why create duplicates?)
// 2. Not doing so might increase number of requests from search engines, thus increasing server load
// Note: feed readers and services such as Yahoo Pipes will not be affected by this header.
// Note: Using Disallow in a robots.txt file will be more effective (search engines will check
// that before even requesting makefulltextfeed.php).
////////////////////////////////
header('X-Robots-Tag: noindex, nofollow');
////////////////////////////////
// Content security headers
////////////////////////////////
header("Content-Security-Policy: script-src 'self'; connect-src 'none'; font-src 'none'; style-src 'self'");
////////////////////////////////
// Check if service is enabled
////////////////////////////////
if (!$options->enabled) {
die('The full-text RSS service is currently disabled');
}
//////////////////////////////////
// Enable Cross-Origin Resource Sharing (CORS)
//////////////////////////////////
if ($options->cors) header('Access-Control-Allow-Origin: *');
////////////////////////////////
// Debug mode?
// See the config file for debug options.
////////////////////////////////
$debug_mode = false;
$debug_show_raw_html = false;
$debug_show_parsed_html = false;
if (isset($_REQUEST['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');
$debug_show_raw_html = ($_REQUEST['debug'] === 'rawhtml');
$debug_show_parsed_html = ($_REQUEST['debug'] === 'parsedhtml');
} else {
if ($options->debug == 'admin') {
die('You must be logged in to the <a href="admin/">admin area</a> 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 = $options->smart_cache && function_exists('apc_inc');
////////////////////////////////
// Check for feed URL
////////////////////////////////
if (!isset($_REQUEST['url'])) {
die('No URL supplied');
}
$url = trim($_REQUEST['url']);
if (strtolower(substr($url, 0, 6)) == 'sec://') {
$url = 'https://'.substr($url, 6);
} elseif (strtolower(substr($url, 0, 7)) == 'feed://') {
$url = 'http://'.substr($url, 7);
}
if (!preg_match('!^https?://.+!i', $url)) {
$url = 'http://'.$url;
}
$url = validate_url($url);
if (!$url) die('Invalid URL supplied');
debug("Supplied URL: $url");
/////////////////////////////////
// Redirect to hide API key
// (if in 'full' mode)
/////////////////////////////////
if ((_FF_FTR_MODE == 'full') && isset($_REQUEST['key']) && ($key_index = array_search($_REQUEST['key'], $options->api_keys)) !== false) {
if (isset($_REQUEST['key_redirect']) && $_REQUEST['key_redirect'] === '0') {
$_REQUEST['hash'] = sha1($_REQUEST['key'].$url);
$_REQUEST['key'] = $key_index;
} else {
$redirect = get_self_url();
if ($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');
}
///////////////////////////////////////////////
// Should we treat input URL as feed or HTML?
///////////////////////////////////////////////
$accept = 'auto';
if (isset($_REQUEST['accept']) && in_array(strtolower($_REQUEST['accept']), array('html', 'feed', 'auto'))) {
$accept = strtolower($_REQUEST['accept']);
} elseif (isset($_REQUEST['html']) && ($_REQUEST['html'] == '1' || $_REQUEST['html'] == 'true')) {
$accept = 'html';
}
///////////////////////////////////////////////
// User-submitted site config
///////////////////////////////////////////////
$user_submitted_config = null;
if (isset($_REQUEST['siteconfig'])) {
$user_submitted_config = $_REQUEST['siteconfig'];
if (!$options->user_submitted_config && $user_submitted_config) {
die('User-submitted site configs are currently disabled. Please remove the siteconfig parameter.');
}
}
///////////////////////////////////////////////
// Check if valid key supplied
///////////////////////////////////////////////
$valid_key = false;
$key_index = false;
// first check for hidden key using hash (key (int) + hash parameters) (can appear in both simple and full modes)
if (isset($_REQUEST['key']) && isset($_REQUEST['hash']) && isset($options->api_keys[(int)$_REQUEST['key']])) {
$valid_key = ($_REQUEST['hash'] == sha1($options->api_keys[(int)$_REQUEST['key']].$url));
if ($valid_key) $key_index = (int)$_REQUEST['key'];
}
// next check for full key (string) passed in request (only simple mode)
if (!$valid_key && _FF_FTR_MODE === 'simple' && isset($_REQUEST['key'])) {
$key_index = array_search($_REQUEST['key'], $options->api_keys);
if ($key_index !== false) $valid_key = true;
}
if (!$valid_key && $options->key_required) {
die('A valid key must be supplied');
}
if (!$valid_key && isset($_REQUEST['key']) && $_REQUEST['key'] != '') {
die('The entered key is invalid');
}
if (file_exists('custom_init.php')) require 'custom_init.php';
///////////////////////////////////////////////
// Check URL against list of blacklisted URLs
///////////////////////////////////////////////
if (!url_allowed($url)) die($options->blocked_message);
///////////////////////////////////////////////
// Max entries
// see config.php to find these values
///////////////////////////////////////////////
if (isset($_REQUEST['max'])) {
$max = (int)$_REQUEST['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 = $options->default_entries;
}
}
///////////////////////////////////////////////
// Link handling
///////////////////////////////////////////////
if (isset($_REQUEST['links']) && in_array($_REQUEST['links'], array('preserve', 'footnotes', 'remove'))) {
$links = $_REQUEST['links'];
} else {
$links = 'preserve';
}
///////////////////////////////////////////////
// Image handling
///////////////////////////////////////////////
$images = true;
if (isset($_REQUEST['images']) && in_array($_REQUEST['images'], array('0', 'remove'))) {
$images = false;
}
///////////////////////////////////////////////
// Favour item titles in feed?
///////////////////////////////////////////////
$favour_feed_titles = true;
if ($options->favour_feed_titles == 'user') {
$favour_feed_titles = (!isset($_REQUEST['use_extracted_title']) || $_REQUEST['use_extracted_title'] === '0');
} else {
$favour_feed_titles = $options->favour_feed_titles;
}
///////////////////////////////////////////////
// Favour effective URL
///////////////////////////////////////////////
$favour_effective_url = false;
if ($options->favour_effective_url == 'user') {
$favour_effective_url = (isset($_REQUEST['use_effective_url']) && $_REQUEST['use_effective_url'] !== '0');
} else {
$favour_effective_url = $options->favour_effective_url;
}
///////////////////////////////////////////////
// Include full content in output?
///////////////////////////////////////////////
if ($options->content === 'user') {
if (isset($_REQUEST['content']) && $_REQUEST['content'] === '0') {
$options->content = false;
} else {
$options->content = true;
}
}
///////////////////////////////////////////////
// HTML5 output?
///////////////////////////////////////////////
if ($options->html5_output === 'user') {
if (isset($_REQUEST['content']) && $_REQUEST['content'] === '1') {
$options->html5_output = false;
} else {
$options->html5_output = true;
}
}
///////////////////////////////////////////////
// Include summaries in output?
///////////////////////////////////////////////
if ($options->summary === 'user') {
if (isset($_REQUEST['summary']) && $_REQUEST['summary'] === '1') {
$options->summary = true;
} else {
$options->summary = false;
}
}
///////////////////////////////////////////////
// Exclude items if extraction fails
///////////////////////////////////////////////
if ($options->exclude_items_on_fail === 'user') {
$exclude_on_fail = (isset($_REQUEST['exc']) && ($_REQUEST['exc'] == '1'));
} else {
$exclude_on_fail = $options->exclude_items_on_fail;
}
///////////////////////////////////////////////
// Detect language
///////////////////////////////////////////////
if ($options->detect_language === 'user') {
if (isset($_REQUEST['lang'])) $_REQUEST['l'] = $_REQUEST['lang'];
if (isset($_REQUEST['l'])) {
$detect_language = (int)$_REQUEST['l'];
} else {
$detect_language = 1;
}
} else {
$detect_language = $options->detect_language;
}
$use_cld = extension_loaded('cld');
/////////////////////////////////////
// Check for valid format
// (stick to RSS (or RSS as JSON) for the time being)
/////////////////////////////////////
if (isset($_REQUEST['format']) && $_REQUEST['format'] == 'json') {
$format = 'json';
} else {
$format = 'rss';
}
/////////////////////////////////////
// Should we do XSS filtering?
/////////////////////////////////////
if ($options->xss_filter === 'user') {
$xss_filter = isset($_REQUEST['xss']) && $_REQUEST['xss'] !== '0';
} else {
$xss_filter = $options->xss_filter;
}
if (!$xss_filter && (isset($_REQUEST['xss']) && $_REQUEST['xss'] !== '0')) {
die('XSS filtering is disabled in config');
}
/////////////////////////////////////
// Check for JSONP
// Regex from https://gist.github.com/1217080
/////////////////////////////////////
$callback = null;
if ($format =='json' && isset($_REQUEST['callback'])) {
$callback = trim($_REQUEST['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");
}
///////////////////////////////////////////////
// Override default HTML parser?
///////////////////////////////////////////////
$parser = null;
if ($options->allow_parser_override && isset($_REQUEST['parser']) && in_array($_REQUEST['parser'], $options->allowed_parsers)) {
$parser = $_REQUEST['parser'];
}
///////////////////////////////////////////////
// Use proxy?
///////////////////////////////////////////////
$proxy = false;
if (!empty($options->proxy_servers)) {
if (isset($_REQUEST['proxy'])) {
// We're choosing proxy based on &proxy value (unless it's not allowed...)
if (!$options->allow_proxy_override) die('Proxy overriding is disabled.');
$proxy = $_REQUEST['proxy'];
if ($proxy === '0') {
$proxy = false;
} elseif ($proxy === '1') {
$proxy = true; // random
}
} else {
// We'll use proxy based on config setting
$proxy = $options->proxy;
}
// Is it a valid value (false, true, or one of the proxies in config)
if ($proxy !== false && $proxy !== true && !in_array($proxy, array_keys($options->proxy_servers))) {
die('Proxy not recognised.');
}
if ($proxy === false) {
debug('Proxy will not be used');
} else {
if ($proxy === true) {
$proxy = array_rand($options->proxy_servers);
}
if (is_string($options->proxy_servers[$proxy]) && $options->proxy_servers[$proxy] === 'direct') {
debug('Proxy will not be used');
$proxy = false;
} else {
debug('Proxy '.$proxy.' will be used.');
$proxy = $options->proxy_servers[$proxy];
}
}
}
//////////////////////////////////
// Has the HTML been given in the request?
//////////////////////////////////
if (isset($_REQUEST['inputhtml']) && _FF_FTR_MODE == 'simple') {
// disable multi-page processing (what we have is what we have)
$options->singlepage = false;
$options->multipage = false;
// disable disk caching
$options->caching = false;
}
//////////////////////////////////
// Check for cached copy
//////////////////////////////////
if ($options->caching) {
debug('Caching is enabled...');
$cache_id = md5($max.$url.(int)$valid_key.$accept.$links.$images.(int)$favour_feed_titles.(int)$options->content.(int)$options->html5_output.(int)$options->summary.(int)$xss_filter.(int)$favour_effective_url.(int)$exclude_on_fail.$format.$detect_language.$parser.$user_submitted_config._FF_FTR_MODE);
$check_cache = true;
if ($options->apc && $options->smart_cache) {
apc_add("cache.$cache_id", 0, $options->cache_time*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 $data;
}
exit;
}
}
}
//////////////////////////////////
// Set cache header
//////////////////////////////////
if (!$debug_mode) {
if ($options->cache_time) {
header('Cache-Control: public, max-age='.($options->cache_time*60));
header('Expires: '.gmdate('D, d M Y H:i:s', time()+($options->cache_time*60)).' GMT');
}
}
//////////////////////////////////
// Set up HTTP agent
//////////////////////////////////
if (isset($_REQUEST['inputhtml']) && _FF_FTR_MODE == 'simple') {
// the user has supplied the HTML, so we use the Dummy agent with
// the given HTML (it will always return this HTML)
$http = new HumbleHttpAgentDummy($_REQUEST['inputhtml']);
} else {
$_req_options = null;
if ($proxy !== false) {
$_req_options = array('proxyhost' => $proxy['host']);
if (isset($proxy['auth'])) {
$_req_options['proxyauth'] = $proxy['auth'];
}
}
$http = new HumbleHttpAgent($_req_options);
$http->debug = $debug_mode;
// User agents can now be set in site config files using the http_header directive
//$http->userAgentMap = $options->user_agents;
$http->headerOnlyTypes = array_keys($options->content_type_exc);
$http->rewriteUrls = $options->rewrite_url;
unset($_req_options);
}
//////////////////////////////////
// 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;
$extractor->parserOverride = $parser;
if (!$images) $extractor->stripImages = true;
if ($options->user_submitted_config && $user_submitted_config) {
$extractor->setUserSubmittedConfig($user_submitted_config);
}
$http->siteConfigBuilder = $extractor;
////////////////////////////////
// Get RSS/Atom feed
////////////////////////////////
if ($accept !== 'html') {
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_sanitize_class('DisableSimplePieSanitize');
// need to assign this manually it seems
$feed->sanitize = new DisableSimplePieSanitize();
//$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($feed->data) == 0)) {
die('Sorry, no feed items found');
} elseif (!$result && $accept === 'feed') {
die('Sorry, couldn\'t parse as feed');
}
// 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.
////////////////////////////////////////////////////////////////////////////////
$isDummyFeed = false;
if ($accept === 'html' || !$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); }
public function get_channel_tags($namespace='', $tag='') { return null; }
}
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, $prefer=null) { return null; }
public function get_enclosures() { return null; }
public function get_categories() { return null; }
public function get_item_tags($namespace='', $tag='') { return null; }
}
$feed = new DummySingleItemFeed($url);
}
////////////////////////////////////////////
// Create full-text feed
////////////////////////////////////////////
$output = new FeedWriter();
if (_FF_FTR_MODE === 'simple') $output->enableSimpleJson();
//$feed_title = $feed->get_title();
//echo $feed_title; exit;
$output->setTitle(strip_tags($feed->get_title()));
$output->setDescription(strip_tags($feed->get_description()));
$output->setXsl('css/feed.xsl'); // Chrome uses this, most browsers ignore it
$ttl = $feed->get_channel_tags(SIMPLEPIE_NAMESPACE_RSS_20, 'ttl');
if ($ttl !== null) {
$ttl = (int)$ttl[0]['data'];
$output->setTtl($ttl);
}
$output->setSelf(get_self_url());
$output->setAlternate($url, 'Source URL');
$output->setRelated('http://www.subtome.com/#/subscribe?feeds='.urlencode(get_self_url()).'&back='.urlencode(get_self_url()), 'Subscribe to feed');
$output->setLink($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) {
$permalink = htmlspecialchars_decode(trim($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 ($permalink) {
if (!url_allowed($permalink)) {
debug('URL blocked, skipping...');
$permalink = false;
} else {
$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 => $item) {
libxml_clear_errors();
debug('--------');
debug('Processing feed item '.($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 ($permalink !== false) {
$newitem->setLink($permalink);
} else {
$newitem->setLink($item->get_permalink());
}
// Status codes to accept (200 range)
// Some sites might return correct content with error status codes
// e.g. prospectmagazine.co.uk returns 403 - in some earlier versions of FTR we accepted a wider range of status codes
// to allow for such cases:
//if ($permalink && ($response = $http->get($permalink, true)) && ($response['status_code'] < 300 || $response['status_code'] > 400)) {
// With the introduction of proxy support in 3.3, we're limiting range of acceptable status codes to avoid proxy
// errors being treated as valid responses.
if ($permalink && ($response = $http->get($permalink, true)) && ($response['status_code'] < 300)) {
$effective_url = $response['effective_url'];
if (!url_allowed($effective_url)) {
debug('URL blocked, skipping...');
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') {
$html = "<a href=\"$effective_url\"><img src=\"$effective_url\" alt=\"{$mime_info['name']}\" /></a>";
} else {
$html = "<a href=\"$effective_url\">Download {$mime_info['name']}</a>";
}
$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, $response['headers']);
// if user has asked to see raw HTML from remote server, show it and exit.
if ($debug_show_raw_html) {
debug("Here are the HTTP response headers from the remote server:");
echo $response['headers'];
debug("Here's the raw HTML (after attempted UTF-8 conversion):");
die($html);
}
// check site config for single page URL - fetch it if found
$is_single_page = false;
if ($options->singlepage && ($single_page_response = get_single_page($item, $html, $effective_url))) {
$is_single_page = true;
$effective_url = $single_page_response['effective_url'];
// check if action defined for returned Content-Type
$mime_info = get_mime_action_info($single_page_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') {
$html = "<a href=\"$effective_url\"><img src=\"$effective_url\" alt=\"{$mime_info['name']}\" /></a>";
} else {
$html = "<a href=\"$effective_url\">Download {$mime_info['name']}</a>";
}
$extracted_title = $mime_info['name'];
$do_content_extraction = false;
}
}
if ($do_content_extraction) {
$html = $single_page_response['body'];
// remove strange things
$html = str_replace('</[>', '', $html);
$html = convert_to_utf8($html, $single_page_response['headers']);
debug("Retrieved single-page view from $effective_url");
}
unset($single_page_response);
}
}
if ($do_content_extraction) {
debug('--------');
debug('Attempting to extract content');
$extract_result = $extractor->process($html, $effective_url);
$readability = $extractor->readability;
// if user has asked to see parsed HTML, show it and exit.
if ($debug_show_parsed_html) {
debug("Here's the full HTML after it's been parsed by Full-Text RSS:");
die(make_html($readability->dom->documentElement));
}
// is this a native ad?
if ($extract_result && $extractor->isNativeAd()) {
debug("This article appears to be a native ad");
if (!$isDummyFeed && $options->remove_native_ads) {
continue; // skip this feed item entry
}
}
$base_url = get_base_url($readability->dom, $effective_url);
if (!$base_url) $base_url = $effective_url;
$content_block = ($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 && $options->content) {
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 $base_url
if ($next_page_url = make_absolute_str($base_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');
$_page = $readability->dom->createElement('p');
$_page->innerHTML = '<em>This article appears to continue on subsequent pages which we could not extract</em>';
$multi_page_content[] = $_page;
}
foreach ($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, $_page);
}
}
// use extracted title for both feed and item title if we're using single-item dummy feed
if ($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 && (_FF_FTR_MODE != 'simple')) {
debug('Failed to extract, so skipping (due to exclude on fail parameter)');
continue; // skip this and move to next item
}
if (_FF_FTR_MODE === 'simple') {
$html = '';
} else {
//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) {
// we've got $base_url already above
//$base_url = get_base_url($readability->dom);
//if (!$base_url) $base_url = $effective_url;
// rewrite URLs
make_absolute($base_url, $content_block);
}
// footnotes
if (($links == 'footnotes') && (strpos($effective_url, 'wikipedia.org') === false)) {
$readability->addFootnotes($content_block);
}
// normalise
$content_block->normalize();
// remove empty text nodes
foreach ($content_block->childNodes as $_n) {
if ($_n->nodeType === XML_TEXT_NODE && trim($_n->textContent) == '') {
$content_block->removeChild($_n);
}
}
// remove nesting: <div><div><div><p>test</p></div></div></div> = <p>test</p>
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', 'li', 'td'))) {
//$html = $content_block->innerHTML;
$html = make_html($content_block, true); // true = innerHTML
//} elseif (in_array(strtolower($content_block->tagName), array('td', 'li'))) {
// $html = '<div>'.$content_block->innerHTML.'</div>';
} else {
//$html = $content_block->ownerDocument->saveXML($content_block); // essentially outerHTML
$html = make_html($content_block); // outerHTML
}
//unset($content_block);
// post-processing cleanup
$html = preg_replace('!<p>[\s\h\v]*</p>!u', '', $html);
$html = str_replace('<p> </p>', '', $html);
if ($links == 'remove') {
$html = preg_replace('!<a\s+[^>]*>!', '', $html);
$html = preg_replace('!</a>!', '', $html);
}
// get text sample for language detection
$_og = $extractor->getOpenGraph();
$text_sample = '';
if (isset($_og['og:title'])) {
$text_sample .= $_og['og:title'];
}
if (isset($_og['og:description'])) {
$text_sample .= ' '.$_og['og:description'];
}
$text_sample .= mb_substr($content_block->textContent, 0, 3000);
unset($_og);
$html = make_substitutions($options->message_to_prepend).$html;
$html .= make_substitutions($options->message_to_append);
}
}
// guid
$_guid = $item->get_permalink();
$_ispermalink = 'true';
$_g = $item->get_item_tags('', 'guid');
if (is_array($_g) && count($_g) > 0) {
$_ispermalink = null;
$_guid = $_g[0]['data'];
if (isset($_g[0]['attribs']) && isset($_g[0]['attribs']['']) && isset($_g[0]['attribs']['']['isPermaLink'])) {
$_ispermalink = $_g[0]['attribs']['']['isPermaLink'];
if ($_ispermalink !== 'true') $_ispermalink = 'false';
}
}
if (isset($_ispermalink)) {
$newitem->addElement('guid', $_guid, array('isPermaLink'=>$_ispermalink));
} else {
$newitem->addElement('guid', $_guid);
}
unset($_g, $_guid, $_ispermalink);
// filter xss?
if ($xss_filter) {
debug('Filtering HTML to remove XSS');
$html = htmLawed::hl($html, array('safe'=>1, 'deny_attribute'=>'style', 'comment'=>1, 'cdata'=>1));
}
// add content
if ($options->summary === true) {
// get summary
$summary = '';
if (!$do_content_extraction) {
$summary = $html;
} else {
// Try to get first few paragraphs
if (isset($content_block) && ($content_block instanceof DOMElement)) {
$_paras = $content_block->getElementsByTagName('p');
foreach ($_paras as $_para) {
$summary .= preg_replace("/[\n\r\t ]+/", ' ', $_para->textContent).' ';
if (strlen($summary) > 200) break;
}
} else {
$summary = $html;
}
}
unset($_paras, $_para);
$summary = get_excerpt($summary);
$newitem->setDescription($summary);
if ($options->content) $newitem->setElement('content:encoded', $html);