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eeec0f1982
full-text-rss/makefulltextfeed.php
Keyvan eeec0f1982 Full-Text RSS 2.8
2012-05-01 00:51:43 +02:00

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<?php
// Create Full-Text Feeds
// Author: Keyvan Minoukadeh
// Copyright (c) 2011 Keyvan Minoukadeh
// License: AGPLv3
// Version: 2.8
// Date: 2011-05-23
/*
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 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($url))
// * URL points to HTML (not feed): html=true (optional, by default it's automatically detected)
// * API key: key=[api key] (optional, refer to config.php)
// * Max entries to process: max=[max number of items] (optional)
error_reporting(E_ALL ^ E_NOTICE);
ini_set("display_errors", 1);
@set_time_limit(120);
// set include path
set_include_path(realpath(dirname(__FILE__).'/libraries').PATH_SEPARATOR.get_include_path());
// Autoloading of classes allows us to include files only when they're
// needed. If we've got a cached copy, for example, only Zend_Cache is loaded.
function __autoload($class_name) {
static $mapping = array(
// Include SimplePie for RSS/Atom parsing
'SimplePie' => 'simplepie/simplepie.class.php',
'SimplePie_Misc' => 'simplepie/simplepie.class.php',
'SimplePie_HTTP_Parser' => 'simplepie/simplepie.class.php',
'SimplePie_File' => 'simplepie/simplepie.class.php',
// Include FeedCreator for RSS/Atom creation
'FeedWriter' => 'feedwriter/FeedWriter.php',
'FeedItem' => 'feedwriter/FeedItem.php',
// Include ContentExtractor and Readability for identifying and extracting content from URLs
'ContentExtractor' => 'content-extractor/ContentExtractor.php',
'SiteConfig' => 'content-extractor/SiteConfig.php',
'Readability' => 'readability/Readability.php',
// Include Humble HTTP Agent to allow parallel requests and response caching
'HumbleHttpAgent' => 'humble-http-agent/HumbleHttpAgent.php',
'SimplePie_HumbleHttpAgent' => 'humble-http-agent/SimplePie_HumbleHttpAgent.php',
'CookieJar' => 'humble-http-agent/CookieJar.php',
// Include IRI class for resolving relative URLs
'IRI' => 'iri/iri.php',
// Include Zend Cache to improve performance (cache results)
'Zend_Cache' => 'Zend/Cache.php',
// Include Zend CSS to XPath for dealing with custom patterns
'Zend_Dom_Query_Css2Xpath' => 'Zend/Dom/Query/Css2Xpath.php'
);
if (isset($mapping[$class_name])) {
//echo "Loading $class_name\n<br />";
require_once $mapping[$class_name];
return true;
} else {
return false;
}
}
////////////////////////////////
// Load config file if it exists
////////////////////////////////
require_once(dirname(__FILE__).'/config.php');
////////////////////////////////
// Check if service is enabled
////////////////////////////////
if (!$options->enabled) {
die('The full-text RSS service is currently disabled');
}
////////////////////////////////
// Check for feed URL
////////////////////////////////
if (!isset($_GET['url'])) {
die('No URL supplied');
}
$url = trim($_GET['url']);
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');
}
////////////////////////////////
// Redirect to alternative URL?
////////////////////////////////
if ($options->alternative_url != '' && !isset($_GET['redir']) && mt_rand(0, 100) > 50) {
$redirect = $options->alternative_url.'?redir=true&url='.urlencode($url);
if (isset($_GET['html'])) $redirect .= '&html='.urlencode($_GET['html']);
if (isset($_GET['key'])) $redirect .= '&key='.urlencode($_GET['key']);
if (isset($_GET['max'])) $redirect .= '&max='.(int)$_GET['max'];
if (isset($_GET['links'])) $redirect .= '&links='.$_GET['links'];
if (isset($_GET['exc'])) $redirect .= '&exc='.$_GET['exc'];
if (isset($_GET['what'])) $redirect .= '&what='.$_GET['what'];
if (isset($_GET['format'])) $redirect .= '&format='.$_GET['format'];
header("Location: $redirect");
exit;
}
/////////////////////////////////
// Redirect to hide API key
/////////////////////////////////
if (isset($_GET['key']) && ($key_index = array_search($_GET['key'], $options->api_keys)) !== false) {
$host = $_SERVER['HTTP_HOST'];
$path = rtrim(dirname($_SERVER['SCRIPT_NAME']), '/\\');
$redirect = 'http://'.htmlspecialchars($host.$path).'/makefulltextfeed.php?url='.urlencode($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['what'])) $redirect .= '&what='.urlencode($_GET['what']);
if (isset($_GET['format'])) $redirect .= '&format='.urlencode($_GET['format']);
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']].$url));
}
///////////////////////////////////////////////
// Check URL against list of blacklisted URLs
///////////////////////////////////////////////
if (!url_allowed($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 = $options->default_entries;
}
}
///////////////////////////////////////////////
// Link handling
///////////////////////////////////////////////
if (($valid_key || !$options->restrict) && isset($_GET['links']) && in_array($_GET['links'], array('preserve', 'footnotes', 'remove'))) {
$links = $_GET['links'];
} else {
$links = 'preserve';
}
///////////////////////////////////////////////
// Exclude items if extraction fails
///////////////////////////////////////////////
if ($options->exclude_items_on_fail == 'user') {
$exclude_on_fail = (isset($_GET['exc']) && ($_GET['exc'] == '1'));
} else {
$exclude_on_fail = $options->exclude_items_on_fail;
}
///////////////////////////////////////////////
// Extraction pattern
///////////////////////////////////////////////
$auto_extract = true;
if ($options->extraction_pattern == 'user') {
$extract_pattern = (isset($_GET['what']) ? trim($_GET['what']) : 'auto');
} else {
$extract_pattern = trim($options->extraction_pattern);
}
if (($extract_pattern != '') && ($extract_pattern != 'auto')) {
// split pattern by space (currently only descendants of 'auto' are recognised)
$extract_pattern = preg_split('/\s+/', $extract_pattern, 2);
if ($extract_pattern[0] == 'auto') { // parent selector is 'auto'
$extract_pattern = $extract_pattern[1];
} else {
$extract_pattern = implode(' ', $extract_pattern);
$auto_extract = false;
}
// Convert CSS to XPath
// Borrowed from Symfony's cssToXpath() function: https://github.com/fabpot/symfony/blob/master/src/Symfony/Component/CssSelector/Parser.php
// (Itself based on Python's lxml library)
if (preg_match('#^\w+\s*$#u', $extract_pattern, $match)) {
$extract_pattern = '//'.trim($match[0]);
} elseif (preg_match('~^(\w*)#(\w+)\s*$~u', $extract_pattern, $match)) {
$extract_pattern = sprintf("%s%s[@id = '%s']", '//', $match[1] ? $match[1] : '*', $match[2]);
} elseif (preg_match('#^(\w*)\.(\w+)\s*$#u', $extract_pattern, $match)) {
$extract_pattern = sprintf("%s%s[contains(concat(' ', normalize-space(@class), ' '), ' %s ')]", '//', $match[1] ? $match[1] : '*', $match[2]);
} else {
// if the patterns above do not match, invoke Zend's CSS to Xpath function
$extract_pattern = Zend_Dom_Query_Css2Xpath::transform($extract_pattern);
}
} else {
$extract_pattern = false;
}
/////////////////////////////////////
// Check for valid format
// (stick to RSS (or RSS as JSON) for the time being)
/////////////////////////////////////
if (isset($_GET['format']) && $_GET['format'] == 'json') {
$format = 'json';
} else {
$format = 'rss';
}
//////////////////////////////////
// Check for cached copy
//////////////////////////////////
if ($options->caching) {
$frontendOptions = array(
'lifetime' => ($valid_key || !$options->restrict) ? 10*60 : 20*60, // cache lifetime of 10 or 20 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_umask' => 0777,
'cache_file_umask' => 0664,
'file_name_prefix' => 'ff'
);
// getting a Zend_Cache_Core object
$cache = Zend_Cache::factory('Core', 'File', $frontendOptions, $backendOptions);
$cache_id = md5($max.$url.$valid_key.$links.$exclude_on_fail.$auto_extract.$extract_pattern.$format.(int)isset($_GET['pubsub']));
if ($data = $cache->load($cache_id)) {
if ($format == 'json') {
header("Content-type: application/json; charset=UTF-8");
} else {
header("Content-type: text/xml; charset=UTF-8");
}
if (headers_sent()) die('Some data has already been output, can\'t send RSS file');
echo $data;
exit;
}
}
//////////////////////////////////
// Set Expires header
//////////////////////////////////
if ($valid_key) {
header('Expires: ' . gmdate('D, d M Y H:i:s', time()+(60*10)) . ' GMT');
} else {
header('Expires: ' . gmdate('D, d M Y H:i:s', time()+(60*20)) . ' GMT');
}
//////////////////////////////////
// Set up HTTP agent
//////////////////////////////////
$http = new HumbleHttpAgent();
//////////////////////////////////
// Set up Content Extractor
//////////////////////////////////
$extractor = new ContentExtractor(dirname(__FILE__).'/site_config/custom', dirname(__FILE__).'/site_config/standard');
/*
if ($options->caching) {
$frontendOptions = array(
'lifetime' => 30*60, // cache lifetime of 30 minutes
'automatic_serialization' => true,
'write_control' => false,
'automatic_cleaning_factor' => $options->cache_cleanup,
'ignore_user_abort' => false
);
$backendOptions = array(
'cache_dir' => $options->cache_dir.'/http-responses/', // 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_umask' => 0777,
'cache_file_umask' => 0664,
'file_name_prefix' => 'ff'
);
$httpCache = Zend_Cache::factory('Core', 'File', $frontendOptions, $backendOptions);
$http->useCache($httpCache);
}
*/
////////////////////////////////
// Get RSS/Atom feed
////////////////////////////////
if (!$html_only) {
// configure SimplePie HTTP extension class to use our HumbleHttpAgent instance
SimplePie_HumbleHttpAgent::set_agent($http);
$feed = new SimplePie();
$feed->set_file_class('SimplePie_HumbleHttpAgent');
//$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');
}
}
////////////////////////////////////////////////////////////////////////////////
// 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) {
$isDummyFeed = true;
unset($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 $this->item->url; }
public function get_image_url() { return false; }
public function get_items($start=0, $max=1) { return array(0=>$this->item); }
}
class DummySingleItem {
public $url;
function __construct($url) { $this->url = $url; }
public function get_permalink() { return $this->url; }
public function get_title() { return ''; }
public function get_date($format='') { return false; }
public function get_author() { return false; }
public function get_description() { return ''; }
}
$feed = new DummySingleItemFeed($url);
}
////////////////////////////////////////////
// Create full-text feed
////////////////////////////////////////////
$output = new FeedWriter();
$output->setTitle($feed->get_title());
$output->setDescription($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(), $img_url);
}
if ($format == 'atom') {
$output->setChannelElement('updated', date(DATE_ATOM));
$output->setChannelElement('author', array('name'=>'Five Filters', 'uri'=>'http://fivefilters.org'));
}
////////////////////////////////////////////
// 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);
$permalink = $http->validateUrl($permalink);
if ($permalink) {
$urls_sanitized[] = $permalink;
}
$urls[$key] = $permalink;
}
$http->fetchAll($urls_sanitized);
//$http->cacheAll();
foreach ($items as $key => $item) {
$extract_result = false;
$permalink = $urls[$key];
$newitem = $output->createNewItem();
$newitem->setTitle(htmlspecialchars_decode($item->get_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) {
$effective_url = $response['effective_url'];
if (!url_allowed($effective_url)) continue;
$html = $response['body'];
// remove strange things
$html = str_replace('</[>', '', $html);
$html = convert_to_utf8($html, $response['headers']);
if ($auto_extract) {
// check site config for single page URL - fetch it if found
if ($single_page_response = getSinglePage($item, $html, $effective_url)) {
$html = $single_page_response['body'];
// remove strange things
$html = str_replace('</[>', '', $html);
$html = convert_to_utf8($html, $single_page_response['headers']);
$effective_url = $single_page_response['effective_url'];
unset($single_page_response);
}
$extract_result = $extractor->process($html, $effective_url);
$readability = $extractor->readability;
$content_block = ($extract_result) ? $extractor->getContent() : null;
$title = ($extract_result) ? $extractor->getTitle() : '';
} else {
$readability = new Readability($html, $effective_url);
// content block is entire document (for now...)
$content_block = $readability->dom;
//TODO: get title
$title = '';
}
// use extracted title for both feed and item title if we're using single-item dummy feed
if ($isDummyFeed) {
$output->setTitle($title);
$newitem->setTitle($title);
}
if ($extract_pattern && isset($content_block)) {
$xpath = new DOMXPath($readability->dom);
$elems = @$xpath->query($extract_pattern, $content_block);
// check if our custom extraction pattern matched
if ($elems && $elems->length > 0) {
$extract_result = true;
// get the first matched element
$content_block = $elems->item(0);
// clean it up
$readability->removeScripts($content_block);
$readability->prepArticle($content_block);
}
}
}
// if we failed to extract content...
if (!$extract_result) {
if ($exclude_on_fail) continue; // skip this and move to next item
if (!$valid_key) {
$html = $options->error_message;
} else {
$html = $options->error_message_with_key;
}
// 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);
}
if ($extract_pattern) {
// get outerHTML
$html = $content_block->ownerDocument->saveXML($content_block);
} else {
if ($content_block->childNodes->length == 1 && $content_block->firstChild->nodeType === XML_ELEMENT_NODE) {
$html = $content_block->firstChild->innerHTML;
} else {
$html = $content_block->innerHTML;
}
}
// post-processing cleanup
$html = preg_replace('!<p>[\s\h\v]*</p>!u', '', $html);
if ($links == 'remove') {
$html = preg_replace('!</?a[^>]*>!', '', $html);
}
if (!$valid_key) {
$html = make_substitutions($options->message_to_prepend).$html;
$html .= make_substitutions($options->message_to_append);
} else {
$html = make_substitutions($options->message_to_prepend_with_key).$html;
$html .= make_substitutions($options->message_to_append_with_key);
}
}
if ($format == 'atom') {
$newitem->addElement('content', $html);
$newitem->setDate((int)$item->get_date('U'));
if ($author = $item->get_author()) {
$newitem->addElement('author', array('name'=>$author->get_name()));
}
} else {
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'));
}
$newitem->setDescription($html);
if ((int)$item->get_date('U') > 0) {
$newitem->setDate((int)$item->get_date('U'));
}
if ($author = $item->get_author()) {
$newitem->addElement('dc:creator', $author->get_name());
}
}
$output->addItem($newitem);
unset($html);
}
// output feed
if ($options->caching || $format == 'json') {
ob_start();
$output->genarateFeed();
$output = ob_get_contents();
ob_end_clean();
if ($format == 'json') {
$jsonrss = new stdClass();
$jsonrss->rss = @simplexml_load_string($output);
$output = json_encode($jsonrss);
header("Content-type: application/json; charset=UTF-8");
}
if ($options->caching) $cache->save($output, $cache_id);
echo $output;
} else {
$output->genarateFeed();
}
///////////////////////////////
// HELPER FUNCTIONS
///////////////////////////////
function url_allowed($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
} else {
$match = end($match); // get last matched element (in case of redirects)
if (isset($match[2])) $encoding = trim($match[2], '"\'');
}
if (!$encoding) {
if (preg_match('/^<\?xml\s+version=(?:"[^"]*"|\'[^\']*\')\s+encoding=("[^"]*"|\'[^\']*\')/s', $html, $match)) {
$encoding = trim($match[1], '"\'');
} elseif(preg_match('/<meta\s+http-equiv=["\']Content-Type["\'] content=["\'][^;]+;\s*charset=["\']?([^;"\'>]+)/i', $html, $match)) {
if (isset($match[1])) $encoding = trim($match[1]);
}
}
if (!$encoding) {
$encoding = 'utf-8';
} else {
if (strtolower($encoding) != 'utf-8') {
if (strtolower($encoding) == 'iso-8859-1') {
// replace MS Word smart qutoes
$trans = array();
$trans[chr(130)] = '&sbquo;'; // Single Low-9 Quotation Mark
$trans[chr(131)] = '&fnof;'; // Latin Small Letter F With Hook
$trans[chr(132)] = '&bdquo;'; // Double Low-9 Quotation Mark
$trans[chr(133)] = '&hellip;'; // Horizontal Ellipsis
$trans[chr(134)] = '&dagger;'; // Dagger
$trans[chr(135)] = '&Dagger;'; // Double Dagger
$trans[chr(136)] = '&circ;'; // Modifier Letter Circumflex Accent
$trans[chr(137)] = '&permil;'; // Per Mille Sign
$trans[chr(138)] = '&Scaron;'; // Latin Capital Letter S With Caron
$trans[chr(139)] = '&lsaquo;'; // Single Left-Pointing Angle Quotation Mark
$trans[chr(140)] = '&OElig;'; // Latin Capital Ligature OE
$trans[chr(145)] = '&lsquo;'; // Left Single Quotation Mark
$trans[chr(146)] = '&rsquo;'; // Right Single Quotation Mark
$trans[chr(147)] = '&ldquo;'; // Left Double Quotation Mark
$trans[chr(148)] = '&rdquo;'; // Right Double Quotation Mark
$trans[chr(149)] = '&bull;'; // Bullet
$trans[chr(150)] = '&ndash;'; // En Dash
$trans[chr(151)] = '&mdash;'; // Em Dash
$trans[chr(152)] = '&tilde;'; // Small Tilde
$trans[chr(153)] = '&trade;'; // Trade Mark Sign
$trans[chr(154)] = '&scaron;'; // Latin Small Letter S With Caron
$trans[chr(155)] = '&rsaquo;'; // Single Right-Pointing Angle Quotation Mark
$trans[chr(156)] = '&oelig;'; // Latin Small Ligature OE
$trans[chr(159)] = '&Yuml;'; // Latin Capital Letter Y With Diaeresis
$html = strtr($html, $trans);
}
$html = SimplePie_Misc::change_encoding($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) {
$base = new IRI($base);
// remove '//' in URL path (causes URLs not to resolve properly)
if (isset($base->ipath)) $base->ipath = preg_replace('!//+!', '/', $base->ipath);
foreach(array('a'=>'href', 'img'=>'src') as $tag => $attr) {
$elems = $elem->getElementsByTagName($tag);
for ($i = $elems->length-1; $i >= 0; $i--) {
$e = $elems->item($i);
//$e->parentNode->replaceChild($articleContent->ownerDocument->createTextNode($e->textContent), $e);
makeAbsoluteAttr($base, $e, $attr);
}
if (strtolower($elem->tagName) == $tag) makeAbsoluteAttr($base, $elem, $attr);
}
}
function makeAbsoluteAttr($base, $e, $attr) {
if ($e->hasAttribute($attr)) {
// Trim leading and trailing white space. I don't really like this but
// unfortunately it does appear on some sites. e.g. <img src=" /path/to/image.jpg" />
$url = trim(str_replace('%20', ' ', $e->getAttribute($attr)));
$url = str_replace(' ', '%20', $url);
if (!preg_match('!https?://!i', $url)) {
$absolute = IRI::absolutize($base, $url);
if ($absolute) {
$e->setAttribute($attr, $absolute);
}
}
}
}
function makeAbsoluteStr($base, $url) {
$base = new IRI($base);
// remove '//' in URL path (causes URLs not to resolve properly)
if (isset($base->ipath)) $base->ipath = preg_replace('!//+!', '/', $base->ipath);
if (preg_match('!^https?://!i', $url)) {
// already absolute
return $url;
} else {
$absolute = IRI::absolutize($base, $url);
if ($absolute) return $absolute;
return false;
}
}
// returns single page response, or false if not found
function getSinglePage($item, $html, $url) {
global $http;
$host = @parse_url($url, PHP_URL_HOST);
$site_config = SiteConfig::build($host);
if ($site_config === false) return false;
$splink = null;
if (!empty($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->hasAttribute('href')) {
$single_page_url = $item->getAttribute('href');
break;
}
}
}
}
// 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 != $url) {
// it's not, so let's try to fetch it...
if (($response = $http->get($single_page_url, true)) && $response['status_code'] < 300) {
return $response;
}
}
}
}
return false;
}
function make_substitutions($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;
}
?>
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