Merge pull request #495 from mariroz/dev

fix of global $http visibility, issues #493, #494

1 files changed, 355 insertions, 0 deletions

diff --git a/inc/3rdparty/makefulltextfeedHelpers.php b/inc/3rdparty/makefulltextfeedHelpers.php
new file mode 100755
index 00000000..1c11b8f6
--- /dev/null
+++ b/inc/3rdparty/makefulltextfeedHelpers.php
@@ -0,0 +1,355 @@
+<?php
+
+// Autoloading of classes allows us to include files only when they're
+// needed. If we've got a cached copy, for example, only Zend_Cache is loaded.
+function autoload($class_name) {
+        static $dir = null;
+        if ($dir === null) $dir = dirname(__FILE__).'/libraries/';
+        static $mapping = array(
+                // Include FeedCreator for RSS/Atom creation
+                'FeedWriter' => 'feedwriter/FeedWriter.php',
+                'FeedItem' => 'feedwriter/FeedItem.php',
+                // Include ContentExtractor and Readability for identifying and extracting content from URLs
+                'ContentExtractor' => 'content-extractor/ContentExtractor.php',
+                'SiteConfig' => 'content-extractor/SiteConfig.php',
+                'Readability' => 'readability/Readability.php',
+                // Include Humble HTTP Agent to allow parallel requests and response caching
+                'HumbleHttpAgent' => 'humble-http-agent/HumbleHttpAgent.php',
+                'SimplePie_HumbleHttpAgent' => 'humble-http-agent/SimplePie_HumbleHttpAgent.php',
+                'CookieJar' => 'humble-http-agent/CookieJar.php',
+                // Include Zend Cache to improve performance (cache results)
+                'Zend_Cache' => 'Zend/Cache.php',
+                // Language detect
+                'Text_LanguageDetect' => 'language-detect/LanguageDetect.php',
+                // HTML5 Lib
+                'HTML5_Parser' => 'html5/Parser.php',
+                // htmLawed - used if XSS filter is enabled (xss_filter)
+                'htmLawed' => 'htmLawed/htmLawed.php'
+        );
+        if (isset($mapping[$class_name])) {
+                debug("** Loading class $class_name ({$mapping[$class_name]})");
+                require $dir.$mapping[$class_name];
+                return true;
+        } else {
+                return false;
+        }
+}
+spl_autoload_register('autoload');
+require dirname(__FILE__).'/libraries/simplepie/autoloader.php';
+
+
+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, $prefer=null) { return null; }
+        public function get_enclosures() { return null; }
+        public function get_categories() { return null; }
+}
+
+///////////////////////////////
+// HELPER FUNCTIONS
+///////////////////////////////
+
+function url_allowed($url) {
+        global $options;
+        if (!empty($options->allowed_urls)) {
+                $allowed = false;
+                foreach ($options->allowed_urls as $allowurl) {
+                        if (stristr($url, $allowurl) !== false) {
+                                $allowed = true;
+                                break;
+                        }
+                }
+                if (!$allowed) return false;
+        } else {
+                foreach ($options->blocked_urls as $blockurl) {
+                        if (stristr($url, $blockurl) !== false) {
+                                return false;
+                        }
+                }
+        }
+        return true;
+}
+
+//////////////////////////////////////////////
+// Convert $html to UTF8
+// (uses HTTP headers and HTML to find encoding)
+// adapted from http://stackoverflow.com/questions/910793/php-detect-encoding-and-make-everything-utf-8
+//////////////////////////////////////////////
+function convert_to_utf8($html, $header=null)
+{
+        $encoding = null;
+        if ($html || $header) {
+                if (is_array($header)) $header = implode("\n", $header);
+                if (!$header || !preg_match_all('/^Content-Type:\s+([^;]+)(?:;\s*charset=["\']?([^;"\'\n]*))?/im', $header, $match, PREG_SET_ORDER)) {
+                        // error parsing the response
+                        debug('Could not find Content-Type header in HTTP response');
+                } else {
+                        $match = end($match); // get last matched element (in case of redirects)
+                        if (isset($match[2])) $encoding = trim($match[2], "\"' \r\n\0\x0B\t");
+                }
+                // TODO: check to see if encoding is supported (can we convert it?)
+                // If it's not, result will be empty string.
+                // For now we'll check for invalid encoding types returned by some sites, e.g. 'none'
+                // Problem URL: http://facta.co.jp/blog/archives/20111026001026.html
+                if (!$encoding || $encoding == 'none') {
+                        // search for encoding in HTML - only look at the first 50000 characters
+                        // Why 50000? See, for example, http://www.lemonde.fr/festival-de-cannes/article/2012/05/23/deux-cretes-en-goguette-sur-la-croisette_1705732_766360.html
+                        // TODO: improve this so it looks at smaller chunks first
+                        $html_head = substr($html, 0, 50000);
+                        if (preg_match('/^<\?xml\s+version=(?:"[^"]*"|\'[^\']*\')\s+encoding=("[^"]*"|\'[^\']*\')/s', $html_head, $match)) {
+                                $encoding = trim($match[1], '"\'');
+                        } elseif (preg_match('/<meta\s+http-equiv=["\']?Content-Type["\']? content=["\'][^;]+;\s*charset=["\']?([^;"\'>]+)/i', $html_head, $match)) {
+                                $encoding = trim($match[1]);
+                        } elseif (preg_match_all('/<meta\s+([^>]+)>/i', $html_head, $match)) {
+                                foreach ($match[1] as $_test) {
+                                        if (preg_match('/charset=["\']?([^"\']+)/i', $_test, $_m)) {
+                                                $encoding = trim($_m[1]);
+                                                break;
+                                        }
+                                }
+                        }
+                }
+                if (isset($encoding)) $encoding = trim($encoding);
+                // trim is important here!
+                if (!$encoding || (strtolower($encoding) == 'iso-8859-1')) {
+                        // replace MS Word smart qutoes
+                        $trans = array();
+                        $trans[chr(130)] = '&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, $trans);
+                }
+                if (!$encoding) {
+                        debug('No character encoding found, so treating as UTF-8');
+                        $encoding = 'utf-8';
+                } else {
+                        debug('Character encoding: '.$encoding);
+                        if (strtolower($encoding) != 'utf-8') {
+                                debug('Converting to UTF-8');
+                                $html = SimplePie_Misc::change_encoding($html, $encoding, 'utf-8');
+                                /*
+                                if (function_exists('iconv')) {
+                                        // iconv appears to handle certain character encodings better than mb_convert_encoding
+                                        $html = iconv($encoding, 'utf-8', $html);
+                                } else {
+                                        $html = mb_convert_encoding($html, 'utf-8', $encoding);
+                                }
+                                */
+                        }
+                }
+        }
+        return $html;
+}
+
+function makeAbsolute($base, $elem) {
+        $base = new SimplePie_IRI($base);
+        // remove '//' in URL path (used to prevent URLs from resolving properly)
+        // TODO: check if this is still the case
+        if (isset($base->path)) $base->path = preg_replace('!//+!', '/', $base->path);
+        foreach(array('a'=>'href', 'img'=>'src') as $tag => $attr) {
+                $elems = $elem->getElementsByTagName($tag);
+                for ($i = $elems->length-1; $i >= 0; $i--) {
+                        $e = $elems->item($i);
+                        //$e->parentNode->replaceChild($articleContent->ownerDocument->createTextNode($e->textContent), $e);
+                        makeAbsoluteAttr($base, $e, $attr);
+                }
+                if (strtolower($elem->tagName) == $tag) makeAbsoluteAttr($base, $elem, $attr);
+        }
+}
+function makeAbsoluteAttr($base, $e, $attr) {
+        if ($e->hasAttribute($attr)) {
+                // Trim leading and trailing white space. I don't really like this but 
+                // unfortunately it does appear on some sites. e.g.  <img src=" /path/to/image.jpg" />
+                $url = trim(str_replace('%20', ' ', $e->getAttribute($attr)));
+                $url = str_replace(' ', '%20', $url);
+                if (!preg_match('!https?://!i', $url)) {
+                        if ($absolute = SimplePie_IRI::absolutize($base, $url)) {
+                                $e->setAttribute($attr, $absolute);
+                        }
+                }
+        }
+}
+function makeAbsoluteStr($base, $url) {
+        $base = new SimplePie_IRI($base);
+        // remove '//' in URL path (causes URLs not to resolve properly)
+        if (isset($base->path)) $base->path = preg_replace('!//+!', '/', $base->path);
+        if (preg_match('!^https?://!i', $url)) {
+                // already absolute
+                return $url;
+        } else {
+                if ($absolute = SimplePie_IRI::absolutize($base, $url)) {
+                        return $absolute;
+                }
+                return false;
+        }
+}
+// returns single page response, or false if not found
+function getSinglePage($item, $html, $url) {
+        global $http, $extractor;
+        debug('Looking for site config files to see if single page link exists');
+        $site_config = $extractor->buildSiteConfig($url, $html);
+        $splink = null;
+        if (!empty($site_config->single_page_link)) {
+                $splink = $site_config->single_page_link;
+        } elseif (!empty($site_config->single_page_link_in_feed)) {
+                // single page link xpath is targeted at feed
+                $splink = $site_config->single_page_link_in_feed;
+                // so let's replace HTML with feed item description
+                $html = $item->get_description();
+        }
+        if (isset($splink)) {
+                // Build DOM tree from HTML
+                $readability = new Readability($html, $url);
+                $xpath = new DOMXPath($readability->dom);
+                // Loop through single_page_link xpath expressions
+                $single_page_url = null;
+                foreach ($splink as $pattern) {
+                        $elems = @$xpath->evaluate($pattern, $readability->dom);
+                        if (is_string($elems)) {
+                                $single_page_url = trim($elems);
+                                break;
+                        } elseif ($elems instanceof DOMNodeList && $elems->length > 0) {
+                                foreach ($elems as $item) {
+                                        if ($item instanceof DOMElement && $item->hasAttribute('href')) {
+                                                $single_page_url = $item->getAttribute('href');
+                                                break 2;
+                                        } elseif ($item instanceof DOMAttr && $item->value) {
+                                                $single_page_url = $item->value;
+                                                break 2;
+                                        }
+                                }
+                        }
+                }
+                // If we've got URL, resolve against $url
+                if (isset($single_page_url) && ($single_page_url = makeAbsoluteStr($url, $single_page_url))) {
+                        // check it's not what we have already!
+                        if ($single_page_url != $url) {
+                                // it's not, so let's try to fetch it...
+                                $_prev_ref = $http->referer;
+                                $http->referer = $single_page_url;
+                                if (($response = $http->get($single_page_url, true)) && $response['status_code'] < 300) {
+                                        $http->referer = $_prev_ref;
+                                        return $response;
+                                }
+                                $http->referer = $_prev_ref;
+                        }
+                }
+        }
+        return false;
+}
+
+// based on content-type http header, decide what to do
+// param: HTTP headers string
+// return: array with keys: 'mime', 'type', 'subtype', 'action', 'name'
+// e.g. array('mime'=>'image/jpeg', 'type'=>'image', 'subtype'=>'jpeg', 'action'=>'link', 'name'=>'Image')
+function get_mime_action_info($headers) {
+        global $options;
+        // check if action defined for returned Content-Type
+        $info = array();
+        if (preg_match('!^Content-Type:\s*(([-\w]+)/([-\w\+]+))!im', $headers, $match)) {
+                // look for full mime type (e.g. image/jpeg) or just type (e.g. image)
+                // match[1] = full mime type, e.g. image/jpeg
+                // match[2] = first part, e.g. image
+                // match[3] = last part, e.g. jpeg
+                $info['mime'] = strtolower(trim($match[1]));
+                $info['type'] = strtolower(trim($match[2]));
+                $info['subtype'] = strtolower(trim($match[3]));
+                foreach (array($info['mime'], $info['type']) as $_mime) {
+                        if (isset($options->content_type_exc[$_mime])) {
+                                $info['action'] = $options->content_type_exc[$_mime]['action'];
+                                $info['name'] = $options->content_type_exc[$_mime]['name'];
+                                break;
+                        }
+                }
+        }
+        return $info;
+}
+
+function remove_url_cruft($url) {
+        // remove google analytics for the time being
+        // regex adapted from http://navitronic.co.uk/2010/12/removing-google-analytics-cruft-from-urls/
+        // https://gist.github.com/758177
+        return preg_replace('/(\?|\&)utm_[a-z]+=[^\&]+/', '', $url);
+}
+
+function make_substitutions($string) {
+        if ($string == '') return $string;
+        global $item, $effective_url;
+        $string = str_replace('{url}', htmlspecialchars($item->get_permalink()), $string);
+        $string = str_replace('{effective-url}', htmlspecialchars($effective_url), $string);
+        return $string;
+}
+
+function get_cache() {
+        global $options, $valid_key;
+        static $cache = null;
+        if ($cache === null) {
+                $frontendOptions = array(
+                        'lifetime' => 10*60, // cache lifetime of 10 minutes
+                        'automatic_serialization' => false,
+                        'write_control' => false,
+                        'automatic_cleaning_factor' => $options->cache_cleanup,
+                        'ignore_user_abort' => false
+                );
+                $backendOptions = array(
+                        'cache_dir' => ($valid_key) ? $options->cache_dir.'/rss-with-key/' : $options->cache_dir.'/rss/', // directory where to put the cache files
+                        'file_locking' => false,
+                        'read_control' => true,
+                        'read_control_type' => 'strlen',
+                        'hashed_directory_level' => $options->cache_directory_level,
+                        'hashed_directory_perm' => 0777,
+                        'cache_file_perm' => 0664,
+                        'file_name_prefix' => 'ff'
+                );
+                // getting a Zend_Cache_Core object
+                $cache = Zend_Cache::factory('Core', 'File', $frontendOptions, $backendOptions);
+        }
+        return $cache;
+}
+
+function debug($msg) {
+        global $debug_mode;
+        if ($debug_mode) {
+                echo '* ',$msg,"\n";
+                ob_flush();
+                flush();
+        }
+}