forked from Dither/full-text-rss
/
makefulltextfeed.php
1364 lines (1280 loc) · 50.5 KB
/
makefulltextfeed.php
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<?php
// Full-Text RSS: Create Full-Text Feeds
// Author: Keyvan Minoukadeh
// Copyright (c) 2013 Keyvan Minoukadeh
// License: AGPLv3
// Version: 3.2
// Date: 2013-05-13
// 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);
ini_set('display_errors', 'On');
ini_set('xdebug.overload_var_dump', '0');
mb_internal_encoding('UTF-8');
@set_time_limit(600);
// 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($process);
}
// set include path
set_include_path(realpath(dirname(__FILE__).'/libraries').PATH_SEPARATOR.get_include_path());
function encodeURI($url) {
// http://php.net/manual/en/function.rawurlencode.php
// https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/encodeURI
$reserved = array( '%2D'=>'-','%5F'=>'_','%2E'=>'.','%21'=>'!', '%2A'=>'*', '%27'=>"'", '%28'=>'(', '%29'=>')' );
$unescaped = array( '%3B'=>';','%2C'=>',','%2F'=>'/','%3F'=>'?','%3A'=>':', '%40'=>'@','%26'=>'&','%3D'=>'=','%2B'=>'+','%24'=>'$');
$score = array( '%23'=>'#' );
static $url_entities = null;
if ($url_entities === null) $url_entities = array_merge($reserved, $unescaped, $score);
$parsed_url = parse_url($url);
$scheme = isset($parsed_url['scheme']) ? $parsed_url['scheme'] . '://' : '';
$host = isset($parsed_url['host']) ? $parsed_url['host'] : '';
$port = isset($parsed_url['port']) ? ':' . $parsed_url['port'] : '';
$user = isset($parsed_url['user']) ? $parsed_url['user'] : '';
$pass = isset($parsed_url['pass']) ? ':' . $parsed_url['pass'] : '';
$pass = ($user || $pass) ? "$pass@" : '';
$path = isset($parsed_url['path']) ? $parsed_url['path'] : '';
$query = isset($parsed_url['query']) ? '?' . $parsed_url['query'] : '';
$fragment = isset($parsed_url['fragment']) ? '#' . $parsed_url['fragment'] : '';
return $scheme.$user.$pass.$host.$port.strtr(rawurlencode($path.$query.$fragment), $url_entities);
}
// Autoloading of classes allows us to include files only when they're
// needed. If we've got a cached copy, for example, only Zend_Cache is loaded.
function autoload($class_name) {
static $dir = null;
if ($dir === null) $dir = dirname(__FILE__).'/libraries/';
static $mapping = array(
// Include FeedCreator for RSS/Atom creation
'FeedWriter' => 'feedwriter/FeedWriter.php',
'FeedItem' => 'feedwriter/FeedItem.php',
// Include ContentExtractor and Readability for identifying and extracting content from URLs
'ContentExtractor' => 'content-extractor/ContentExtractor.php',
'SiteConfig' => 'content-extractor/SiteConfig.php',
'Readability' => 'readability/Readability.php',
// Include Humble HTTP Agent to allow parallel requests and response caching
'HumbleHttpAgent' => 'humble-http-agent/HumbleHttpAgent.php',
'SimplePie_HumbleHttpAgent' => 'humble-http-agent/SimplePie_HumbleHttpAgent.php',
'CookieJar' => 'humble-http-agent/CookieJar.php',
// Include Zend Cache to improve performance (cache results)
'Zend_Cache' => 'Zend/Cache.php',
// Language detect
'Text_LanguageDetect' => 'language-detect/LanguageDetect.php',
// HTML5 Lib
'HTML5_Parser' => 'html5/Parser.php',
// htmLawed - used if XSS filter is enabled (xss_filter)
'htmLawed' => 'htmLawed/htmLawed2.php'
);
if (isset($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']) && intval($_GET['debug']) === 1) {
if ($options->debug === true || $options->debug === 'user') {
$debug_mode = true;
} elseif ($options->debug == 'admin') {
session_start();
$debug_mode = (intval(@$_SESSION['auth']) === 1);
}
if ($debug_mode) {
header('Content-Type: text/html; charset=utf-8');
echo '<style>body {font:12px "Lucida Console", Monaco, monospace;}</style>';
debug('Running in debugging mode...');
} else {
if ($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 = $options->smart_cache && function_exists('apc_inc');
////////////////////////////////
// Check for feed URL
////////////////////////////////
if (!isset($_GET['url'])) {
die('No URL supplied');
}
$url = filter_var(trim($_GET['url']), FILTER_SANITIZE_URL);
if (strtolower(substr($url, 0, 7)) == 'feed://') {
$url = 'http://'.substr($url, 7);
}
if (!preg_match('!^https?://.+!i', $url)) {
$url = 'http://'.$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['content'])) $redirect .= '&content='.urlencode($_GET['content']);
if (isset($_GET['summary'])) $redirect .= '&summary='.urlencode($_GET['summary']);
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']) && (intval($_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) ? intval($_GET['key']) : 0;
if (!$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'])) {
$max = intval($_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 = $options->favour_feed_titles;
}
///////////////////////////////////////////////
// Include full content in output?
///////////////////////////////////////////////
if ($options->content === 'user') {
if (isset($_GET['content']) && intval($_GET['content']) === 0) {
$options->content = false;
} else {
$options->content = true;
}
}
///////////////////////////////////////////////
// Include summaries in output?
///////////////////////////////////////////////
if ($options->summary === 'user') {
if (isset($_GET['summary']) && intval($_GET['summary']) === 1) {
$options->summary = true;
} else {
$options->summary = false;
}
}
///////////////////////////////////////////////
// Exclude items if extraction fails
///////////////////////////////////////////////
if ($options->exclude_items_on_fail === 'user') {
$exclude_on_fail = (isset($_GET['exc']) && (intval($_GET['exc']) === 1));
} else {
$exclude_on_fail = $options->exclude_items_on_fail;
}
///////////////////////////////////////////////
// Detect language
///////////////////////////////////////////////
if ($options->detect_language === 'user') {
if (isset($_GET['l'])) {
$detect_language = intval($_GET['l']);
} else {
$detect_language = 1;
}
} else {
$detect_language = $options->detect_language;
}
$use_cld = extension_loaded('cld') && (version_compare(PHP_VERSION, '5.3.0') >= 0);
/////////////////////////////////////
// Check for valid format
// (stick to RSS (or RSS as JSON) for the time being)
/////////////////////////////////////
if (isset($_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...');
$cache_id = md5((int)$max.$url.$links.(int)$favour_feed_titles.(int)$options->content.(int)$options->summary.(int)$xss_filter.(int)$exclude_on_fail.$format.$detect_language);
$check_cache = true;
if ($options->apc === true && $options->smart_cache === true) {
apc_add("cache.$cache_id", 0, isset($options->cache_ttl) ? $options->cache_ttl : 10*60);
$apc_cache_hits = intval(apc_fetch("cache.$cache_id"));
apc_inc("cache.$cache_id");
if ($check_cache = ($apc_cache_hits >= 2)) {
debug('Cache key found in APC, we\'ll try to load cache file from disk');
} else {
debug('Cache key not found in APC');
}
}
if ($check_cache === true) {
$cache = get_cache();
if ($data = $cache->load($cache_id)) {
if ($debug_mode) {
debug('Loaded cached copy of RSS');
exit;
}
if ($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()+ (isset($options->cache_ttl) ? $options->cache_ttl : 10*60)) . ' 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 = $options->rewrite_url;
//$http->initCache($options->cache_dir, $options->cache_directory_level, $options->cache_cleanup, isset($options->http_cache_ttl) ? $options->http_cache_ttl : 12*60*60);
//////////////////////////////////
// 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;
// Enable caching for multiple downloader
if (class_exists('HttpRequestPool')) {
$http->method = $http::METHOD_REQUEST_POOL;
} elseif (function_exists('curl_multi_init')) {
$http->method = $http::METHOD_CURL_MULTI;
} else {
$http->method = $http::METHOD_FILE_GET_CONTENTS;
}
}
////////////////////////////////////////////////////////////////////////////////
// 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', ':', $permalink);
// simplepie already sanitizes URLs so let's not do it again here.
if ($permalink && !is_cached($permalink)) $urls_sanitized[] = $permalink;
$urls[$key] = encodeURI($permalink);
}
debug('--------');
debug('Fetching feed items');
$http->fetchAll($urls_sanitized);
// count number of items added to full feed
$item_count = 0;
foreach ($items as $key => $item) {
debug('--------');
$do_content_extraction = true;
debug('Processing feed item '.sprintf('%02d', $item_count+1).'.');
$extraction_successful = 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 (isset($permalink) && is_string($permalink)) {
$newitem->setLink($permalink);
} else {
$permalink = $item->get_permalink();
$newitem->setLink($permalink);
}
if (isset($permalink) && is_string($permalink) && strlen($permalink) < 9) {
continue;
}
//if ($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
$cached_page = is_cached($permalink);
if ($cached_page) {
debug('Loading processed page form cache...');
$html = get_cached($permalink);
$extraction_successful = true;
} else if ((($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') {
$html = "<a href=\"$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']);
// 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;
$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');
$extraction_successful = $extractor->process($html, $effective_url);
$readability = $extractor->readability;
$content_block = ($extraction_successful) ? $extractor->getContent() : null;
$extracted_title = ($extraction_successful) ? $extractor->getTitle() : '';
// Deal with multi-page articles
//die('Next: '.$extractor->getNextPageUrl());
$is_multi_page = (!$is_single_page && $extraction_successful && $extractor->getNextPageUrl());
if ($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 $url
if ($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');
$_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 ($do_content_extraction) {
// if we failed to extract content...
if (!$extraction_successful) {
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 .= $item->get_description();
} else {
if (!$cached_page) {
$readability->clean($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: <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;
$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
}
// post-processing cleanup
$html = preg_replace('!<p>[\s\h\v]*</p>!u', '', $html);
if ($links == 'remove') {
$html = preg_replace('!</?a[^>]*>!', '', $html);
}
// get text sample for language detection
$text_sample = strip_tags(substr($html, 0, 500));
if ($options->message_to_prepend) $html = make_substitutions($options->message_to_prepend).$html;
if ($options->message_to_append) $html .= make_substitutions($options->message_to_append);
// 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));
}
set_cached($permalink, $html);
}
}
}
$newitem->addElement('guid', $item->get_permalink(), array('isPermaLink'=>'true'));
// add content
if ($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;
}
}
$summary = get_excerpt($summary);
$newitem->setDescription($summary);
if ($options->content) $newitem->setElement('content:encoded', $html);
unset($_paras, $_para, $content_block);
} else {
if ($options->content) $newitem->setDescription($html);
unset($content_block);
}
// set date
if ((int)$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();
$l->setNameMode(2); // return ISO 639-1 codes (e.g. "en")
}
$l_result = $l->detect($text_sample, 1);
if (count($l_result) > 0) {
$language = key($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 === true);
// is smart cache mode enabled?
if ($add_to_cache && $options->apc === true && $options->smart_cache === true) {
// 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();
$cache->save($output, $cache_id);
}
echo $output;
} else {
$output->genarateFeed();
}