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<?php |
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/* Project: MagpieRSS: a simple RSS integration tool |
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* File: A compiled file for RSS syndication |
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* Author: Kellan Elliot-McCrea <kellan@protest.net> |
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* WordPress development team <http://www.wordpress.org/> |
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* Charles Johnson <technophilia@radgeek.com> |
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* Version: 0.85wp (2007.09.24) |
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* License: GPL |
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* |
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* Provenance: |
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* |
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* This is a drop-in replacement for the `rss-functions.php` provided with the |
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* WordPress 1.5 distribution, which upgrades the version of MagpieRSS from 0.51 |
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* to 0.8a. The update improves handling of character encoding, supports |
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* multiple categories for posts (using <dc:subject> or <category>), supports |
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* Atom 1.0, and implements many other useful features. The file is derived from |
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* a combination of (1) the WordPress development team's modifications to |
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* MagpieRSS 0.51 and (2) the latest bleeding-edge updates to the "official" |
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* MagpieRSS software, including Kellan's original work and some substantial |
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* updates by Charles Johnson. All possible through the magic of the GPL. Yay |
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* for free software! |
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* |
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* Differences from the main branch of MagpieRSS: |
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* |
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* 1. Everything in rss_parse.inc, rss_fetch.inc, rss_cache.inc, and |
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* rss_utils.inc is included in one file. |
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* |
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* 2. MagpieRSS returns the WordPress version as the user agent, rather than |
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* Magpie |
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* |
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* 3. class RSSCache is a modified version by WordPress developers, which |
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* caches feeds in the WordPress database (in the options table), rather |
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* than writing external files directly. |
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* |
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* 4. There are two WordPress-specific functions, get_rss() and wp_rss() |
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* |
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* Differences from the version of MagpieRSS packaged with WordPress: |
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* |
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* 1. Support for translation between multiple character encodings. Under |
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* PHP 5 this is very nicely handled by the XML parsing library. Under PHP |
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* 4 we need to do a little bit of work ourselves, using either iconv or |
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* mb_convert_encoding if it is not one of the (extremely limited) number |
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* of character sets that PHP 4's XML module can handle natively. |
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* |
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* 2. Numerous bug fixes. |
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* |
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* 3. The parser class MagpieRSS has been substantially revised to better |
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* support popular features such as enclosures and multiple categories, |
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* and to support the new Atom 1.0 IETF standard. (Atom feeds are |
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* normalized so as to make the data available using terminology from |
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* either Atom 0.3 or Atom 1.0. Atom 0.3 backward-compatibility is provided |
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* to allow existing software to easily begin accepting Atom 1.0 data; new |
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* software SHOULD NOT depend on the 0.3 terminology, but rather use the |
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* normalization as a convenient way to keep supporting 0.3 feeds while |
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* they linger in the world.) |
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* |
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* The upgraded MagpieRSS can also now handle some content constructs that |
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* had not been handled well by previous versions of Magpie (such as the |
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* use of namespaced XHTML in <xhtml:body> or <xhtml:div> elements to |
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* provide the full content of posts in RSS 2.0 feeds). |
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* |
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* Unlike previous versions of MagpieRSS, this version can parse multiple |
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* instances of the same child element in item/entry and channel/feed |
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* containers. This is done using simple counters next to the element |
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* names: the first <category> element on an RSS item, for example, can be |
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* found in $item['category'] (thus preserving backward compatibility); the |
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* second in $item['category#2'], the third in $item['category#3'], and so |
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* on. The number of categories applied to the item can be found in |
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* $item['category#'] |
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* |
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* Also unlike previous versions of MagpieRSS, this version allows you to |
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* access the values of elements' attributes as well as the content they |
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* contain. This can be done using a simple syntax inspired by XPath: to |
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* access the type attribute of an RSS 2.0 enclosure, for example, you |
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* need only access `$item['enclosure@type']`. A comma-separated list of |
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* attributes for the enclosure element is stored in `$item['enclosure@']`. |
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* (This syntax interacts easily with the syntax for multiple categories; |
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* for example, the value of the `scheme` attribute for the fourth category |
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* element on a particular item is stored in `$item['category#4@scheme']`.) |
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* |
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* Note also that this implementation IS NOT backward-compatible with the |
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* kludges that were used to hack in support for multiple categories and |
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* for enclosures in upgraded versions of MagpieRSS distributed with |
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* previous versions of FeedWordPress. If your hacks or filter plugins |
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* depended on the old way of doing things... well, I warned you that they |
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* might not be permanent. Sorry! |
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*/ |
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|
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define('RSS', 'RSS'); |
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define('ATOM', 'Atom'); |
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|
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################################################################################ |
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## WordPress: make some settings WordPress-appropriate ######################### |
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################################################################################ |
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|
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define('MAGPIE_USER_AGENT', 'WordPress/' . $wp_version . '(+http://www.wordpress.org)'); |
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|
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$wp_encoding = get_settings('blog_charset'); |
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define('MAGPIE_OUTPUT_ENCODING', ($wp_encoding?$wp_encoding:'ISO-8859-1')); |
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|
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################################################################################ |
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## rss_parse.inc: from MagpieRSS 0.85 ########################################## |
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################################################################################ |
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|
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/** |
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* Hybrid parser, and object, takes RSS as a string and returns a simple object. |
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* |
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* see: rss_fetch.inc for a simpler interface with integrated caching support |
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* |
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*/ |
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class MagpieRSS { |
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var $parser; |
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|
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var $current_item = array(); // item currently being parsed |
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var $items = array(); // collection of parsed items |
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var $channel = array(); // hash of channel fields |
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var $textinput = array(); |
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var $image = array(); |
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var $feed_type; |
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var $feed_version; |
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var $encoding = ''; // output encoding of parsed rss |
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|
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var $_source_encoding = ''; // only set if we have to parse xml prolog |
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|
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var $ERROR = ""; |
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var $WARNING = ""; |
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|
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// define some constants |
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var $_XMLNS_FAMILIAR = array ( |
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'http://www.w3.org/2005/Atom' => 'atom' /* 1.0 */, |
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'http://purl.org/atom/ns#' => 'atom' /* pre-1.0 */, |
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'http://purl.org/rss/1.0/' => 'rss' /* 1.0 */, |
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'http://backend.userland.com/RSS2' => 'rss' /* 2.0 */, |
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'http://www.w3.org/1999/02/22-rdf-syntax-ns#' => 'rdf', |
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'http://www.w3.org/1999/xhtml' => 'xhtml', |
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'http://purl.org/dc/elements/1.1/' => 'dc', |
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'http://purl.org/dc/terms/' => 'dcterms', |
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'http://purl.org/rss/1.0/modules/content/' => 'content', |
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'http://purl.org/rss/1.0/modules/syndication/' => 'sy', |
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'http://purl.org/rss/1.0/modules/taxonomy/' => 'taxo', |
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'http://purl.org/rss/1.0/modules/dc/' => 'dc', |
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'http://wellformedweb.org/CommentAPI/' => 'wfw', |
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'http://webns.net/mvcb/' => 'admin', |
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'http://purl.org/rss/1.0/modules/annotate/' => 'annotate', |
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'http://xmlns.com/foaf/0.1/' => 'foaf', |
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'http://madskills.com/public/xml/rss/module/trackback/' => 'trackback', |
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'http://web.resource.org/cc/' => 'cc' |
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); |
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|
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var $_XMLBASE_RESOLVE = array ( |
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// Atom 0.3 and 1.0 xml:base support |
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'atom' => array ( |
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'link' => array ('href' => true), |
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'content' => array ('src' => true, '*xml' => true, '*html' => true), |
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'summary' => array ('*xml' => true, '*html' => true), |
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'title' => array ('*xml' => true, '*html' => true), |
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'rights' => array ('*xml' => true, '*html' => true), |
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'subtitle' => array ('*xml' => true, '*html' => true), |
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'info' => array('*xml' => true, '*html' => true), |
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'tagline' => array('*xml' => true, '*html' => true), |
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'copyright' => array ('*xml' => true, '*html' => true), |
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'generator' => array ('uri' => true, 'url' => true), |
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'uri' => array ('*content' => true), |
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'url' => array ('*content' => true), |
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'icon' => array ('*content' => true), |
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'logo' => array ('*content' => true), |
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), |
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|
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// for inline namespaced XHTML |
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'xhtml' => array ( |
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'a' => array ('href' => true), |
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'applet' => array('codebase' => true), |
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'area' => array('href' => true), |
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'blockquote' => array('cite' => true), |
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'body' => array('background' => true), |
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'del' => array('cite' => true), |
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'form' => array('action' => true), |
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'frame' => array('longdesc' => true, 'src' => true), |
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'iframe' => array('longdesc' => true, 'iframe' => true, 'src' => true), |
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'head' => array('profile' => true), |
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'img' => array('longdesc' => true, 'src' => true, 'usemap' => true), |
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'input' => array('src' => true, 'usemap' => true), |
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'ins' => array('cite' => true), |
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'link' => array('href' => true), |
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'object' => array('classid' => true, 'codebase' => true, 'data' => true, 'usemap' => true), |
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'q' => array('cite' => true), |
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'script' => array('src' => true), |
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), |
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); |
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|
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var $_ATOM_CONTENT_CONSTRUCTS = array( |
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'content', 'summary', 'title', /* common */ |
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'info', 'tagline', 'copyright', /* Atom 0.3 */ |
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'rights', 'subtitle', /* Atom 1.0 */ |
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); |
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var $_XHTML_CONTENT_CONSTRUCTS = array('body', 'div'); |
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var $_KNOWN_ENCODINGS = array('UTF-8', 'US-ASCII', 'ISO-8859-1'); |
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|
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// parser variables, useless if you're not a parser, treat as private |
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var $stack = array('element' => array (), 'xmlns' => array (), 'xml:base' => array ()); // stack of XML data |
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|
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var $inchannel = false; |
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var $initem = false; |
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|
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var $incontent = array(); // non-empty if in namespaced XML content field |
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var $xml_escape = false; // true when accepting namespaced XML |
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var $exclude_top = false; // true when Atom 1.0 type="xhtml" |
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|
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var $intextinput = false; |
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var $inimage = false; |
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var $root_namespaces = array(); |
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var $current_namespace = false; |
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var $working_namespace_table = array(); |
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|
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/** |
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* Set up XML parser, parse source, and return populated RSS object.. |
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* |
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* @param string $source string containing the RSS to be parsed |
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* |
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* NOTE: Probably a good idea to leave the encoding options alone unless |
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* you know what you're doing as PHP's character set support is |
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* a little weird. |
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* |
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* NOTE: A lot of this is unnecessary but harmless with PHP5 |
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* |
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* |
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* @param string $output_encoding output the parsed RSS in this character |
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* set defaults to ISO-8859-1 as this is PHP's |
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* default. |
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* |
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* NOTE: might be changed to UTF-8 in future |
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* versions. |
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* |
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* @param string $input_encoding the character set of the incoming RSS source. |
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* Leave blank and Magpie will try to figure it |
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* out. |
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* |
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* |
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* @param bool $detect_encoding if false Magpie won't attempt to detect |
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* source encoding. (caveat emptor) |
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* |
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*/ |
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function MagpieRSS ($source, $output_encoding='ISO-8859-1', |
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$input_encoding=null, $detect_encoding=true, $base_uri=null) |
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{ |
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# if PHP xml isn't compiled in, die |
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# |
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if (!function_exists('xml_parser_create')) { |
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$this->error( "Failed to load PHP's XML Extension. " . |
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"http://www.php.net/manual/en/ref.xml.php", |
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E_USER_ERROR ); |
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} |
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|
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list($parser, $source) = $this->create_parser($source, |
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$output_encoding, $input_encoding, $detect_encoding); |
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|
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|
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if (!is_resource($parser)) { |
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$this->error( "Failed to create an instance of PHP's XML parser. " . |
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"http://www.php.net/manual/en/ref.xml.php", |
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E_USER_ERROR ); |
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} |
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|
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|
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$this->parser = $parser; |
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|
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# pass in parser, and a reference to this object |
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# setup handlers |
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# |
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xml_set_object( $this->parser, $this ); |
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xml_set_element_handler($this->parser, |
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'feed_start_element', 'feed_end_element' ); |
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|
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xml_set_character_data_handler( $this->parser, 'feed_cdata' ); |
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|
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$this->stack['xml:base'] = array($base_uri); |
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|
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$status = xml_parse( $this->parser, $source ); |
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|
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if (! $status ) { |
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$errorcode = xml_get_error_code( $this->parser ); |
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if ( $errorcode != XML_ERROR_NONE ) { |
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$xml_error = xml_error_string( $errorcode ); |
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$error_line = xml_get_current_line_number($this->parser); |
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$error_col = xml_get_current_column_number($this->parser); |
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$errormsg = "$xml_error at line $error_line, column $error_col"; |
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|
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$this->error( $errormsg ); |
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} |
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} |
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|
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xml_parser_free( $this->parser ); |
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|
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$this->normalize(); |
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} |
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|
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function feed_start_element($p, $element, &$attributes) { |
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$el = strtolower($element); |
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|
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$namespaces = end($this->stack['xmlns']); |
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$baseuri = end($this->stack['xml:base']); |
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|
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if (isset($attributes['xml:base'])) { |
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$baseuri = Relative_URI::resolve($attributes['xml:base'], $baseuri); |
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} |
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array_push($this->stack['xml:base'], $baseuri); |
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|
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// scan for xml namespace declarations. ugly ugly ugly. |
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// theoretically we could use xml_set_start_namespace_decl_handler and |
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// xml_set_end_namespace_decl_handler to handle this more elegantly, but |
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// support for these is buggy |
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foreach ($attributes as $attr => $value) { |
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if ( preg_match('/^xmlns(\:([A-Z_a-z].*))?$/', $attr, $match) ) { |
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$ns = (isset($match[2]) ? $match[2] : ''); |
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$namespaces[$ns] = $value; |
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} |
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} |
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|
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array_push($this->stack['xmlns'], $namespaces); |
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|
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// check for a namespace, and split if found |
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// Don't munge content tags |
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$ns = $this->namespace($element); |
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if ( empty($this->incontent) ) { |
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$el = strtolower($ns['element']); |
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$this->current_namespace = $ns['effective']; |
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} |
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|
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$nsc = $ns['canonical']; $nse = $ns['element']; |
| 330 |
if ( isset($this->_XMLBASE_RESOLVE[$nsc][$nse]) ) { |
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if (isset($this->_XMLBASE_RESOLVE[$nsc][$nse]['*xml'])) { |
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$attributes['xml:base'] = $baseuri; |
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} |
| 334 |
foreach ($attributes as $key => $value) { |
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if (isset($this->_XMLBASE_RESOLVE[$nsc][$nse][strtolower($key)])) { |
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$attributes[$key] = Relative_URI::resolve($attributes[$key], $baseuri); |
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} |
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} |
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} |
| 340 |
|
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$attrs = array_change_key_case($attributes, CASE_LOWER); |
| 342 |
|
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# if feed type isn't set, then this is first element of feed |
| 344 |
# identify feed from root element |
| 345 |
# |
| 346 |
if (!isset($this->feed_type) ) { |
| 347 |
if ( $el == 'rdf' ) { |
| 348 |
$this->feed_type = RSS; |
| 349 |
$this->root_namespaces = array('rss', 'rdf'); |
| 350 |
$this->feed_version = '1.0'; |
| 351 |
} |
| 352 |
elseif ( $el == 'rss' ) { |
| 353 |
$this->feed_type = RSS; |
| 354 |
$this->root_namespaces = array('rss'); |
| 355 |
$this->feed_version = $attrs['version']; |
| 356 |
} |
| 357 |
elseif ( $el == 'feed' ) { |
| 358 |
$this->feed_type = ATOM; |
| 359 |
$this->root_namespaces = array('atom'); |
| 360 |
if ($ns['uri'] == 'http://www.w3.org/2005/Atom') { // Atom 1.0 |
| 361 |
$this->root_namespaces = array('atom'); |
| 362 |
$this->feed_version = '1.0'; |
| 363 |
} |
| 364 |
else { // Atom 0.3, probably. |
| 365 |
$this->feed_version = $attrs['version']; |
| 366 |
} |
| 367 |
$this->inchannel = true; |
| 368 |
} |
| 369 |
return; |
| 370 |
} |
| 371 |
|
| 372 |
// if we're inside a namespaced content construct, treat tags as text |
| 373 |
if ( !empty($this->incontent) ) |
| 374 |
{ |
| 375 |
if ((count($this->incontent) > 1) or !$this->exclude_top) { |
| 376 |
if ($ns['effective']=='xhtml') { |
| 377 |
$tag = $ns['element']; |
| 378 |
} |
| 379 |
else { |
| 380 |
$tag = $element; |
| 381 |
$xmlns = 'xmlns'; |
| 382 |
if (strlen($ns['prefix'])>0) { |
| 383 |
$xmlns = $xmlns . ':' . $ns['prefix']; |
| 384 |
} |
| 385 |
$attributes[$xmlns] = $ns['uri']; // make sure it's visible |
| 386 |
} |
| 387 |
|
| 388 |
// if tags are inlined, then flatten |
| 389 |
$attrs_str = join(' ', |
| 390 |
array_map(array($this, 'map_attrs'), |
| 391 |
array_keys($attributes), |
| 392 |
array_values($attributes) ) |
| 393 |
); |
| 394 |
|
| 395 |
if (strlen($attrs_str) > 0) { $attrs_str = ' '.$attrs_str; } |
| 396 |
$this->append_content( "<{$tag}{$attrs_str}>" ); |
| 397 |
} |
| 398 |
array_push($this->incontent, $ns); // stack for parsing content XML |
| 399 |
} |
| 400 |
|
| 401 |
elseif ( $el == 'channel' ) { |
| 402 |
$this->inchannel = true; |
| 403 |
} |
| 404 |
|
| 405 |
elseif ($el == 'item' or $el == 'entry' ) |
| 406 |
{ |
| 407 |
$this->initem = true; |
| 408 |
if ( isset($attrs['rdf:about']) ) { |
| 409 |
$this->current_item['about'] = $attrs['rdf:about']; |
| 410 |
} |
| 411 |
} |
| 412 |
|
| 413 |
// if we're in the default namespace of an RSS feed, |
| 414 |
// record textinput or image fields |
| 415 |
elseif ( |
| 416 |
$this->feed_type == RSS and |
| 417 |
$this->current_namespace == '' and |
| 418 |
$el == 'textinput' ) |
| 419 |
{ |
| 420 |
$this->intextinput = true; |
| 421 |
} |
| 422 |
|
| 423 |
elseif ( |
| 424 |
$this->feed_type == RSS and |
| 425 |
$this->current_namespace == '' and |
| 426 |
$el == 'image' ) |
| 427 |
{ |
| 428 |
$this->inimage = true; |
| 429 |
} |
| 430 |
|
| 431 |
// set stack[0] to current element |
| 432 |
else { |
| 433 |
// Atom support many links per containing element. |
| 434 |
// Magpie treats link elements of type rel='alternate' |
| 435 |
// as being equivalent to RSS's simple link element. |
| 436 |
|
| 437 |
$atom_link = false; |
| 438 |
if ($this->feed_type == ATOM and $el == 'link') { |
| 439 |
$atom_link = true; |
| 440 |
if (isset($attrs['rel']) and $attrs['rel'] != 'alternate') { |
| 441 |
$el = $el . "_" . $attrs['rel']; // pseudo-element names for Atom link elements |
| 442 |
} |
| 443 |
} |
| 444 |
# handle atom content constructs |
| 445 |
elseif ( $this->feed_type == ATOM and in_array($el, $this->_ATOM_CONTENT_CONSTRUCTS) ) |
| 446 |
{ |
| 447 |
// avoid clashing w/ RSS mod_content |
| 448 |
if ($el == 'content' ) { |
| 449 |
$el = 'atom_content'; |
| 450 |
} |
| 451 |
|
| 452 |
// assume that everything accepts namespaced XML |
| 453 |
// (that will pass through some non-validating feeds; |
| 454 |
// but so what? this isn't a validating parser) |
| 455 |
$this->incontent = array(); |
| 456 |
array_push($this->incontent, $ns); // start a stack |
| 457 |
|
| 458 |
$this->xml_escape = $this->accepts_namespaced_xml($attrs); |
| 459 |
|
| 460 |
if ( isset($attrs['type']) and trim(strtolower($attrs['type']))=='xhtml') { |
| 461 |
$this->exclude_top = true; |
| 462 |
} else { |
| 463 |
$this->exclude_top = false; |
| 464 |
} |
| 465 |
} |
| 466 |
# Handle inline XHTML body elements --CWJ |
| 467 |
elseif ($ns['effective']=='xhtml' and in_array($el, $this->_XHTML_CONTENT_CONSTRUCTS)) { |
| 468 |
$this->current_namespace = 'xhtml'; |
| 469 |
$this->incontent = array(); |
| 470 |
array_push($this->incontent, $ns); // start a stack |
| 471 |
|
| 472 |
$this->xml_escape = true; |
| 473 |
$this->exclude_top = false; |
| 474 |
} |
| 475 |
|
| 476 |
array_unshift($this->stack['element'], $el); |
| 477 |
$elpath = join('_', array_reverse($this->stack['element'])); |
| 478 |
|
| 479 |
$n = $this->element_count($elpath); |
| 480 |
$this->element_count($elpath, $n+1); |
| 481 |
|
| 482 |
if ($n > 0) { |
| 483 |
array_shift($this->stack['element']); |
| 484 |
array_unshift($this->stack['element'], $el.'#'.($n+1)); |
| 485 |
$elpath = join('_', array_reverse($this->stack['element'])); |
| 486 |
} |
| 487 |
|
| 488 |
// this makes the baby Jesus cry, but we can't do it in normalize() |
| 489 |
// because we've made the element name for Atom links unpredictable |
| 490 |
// by tacking on the relation to the end. -CWJ |
| 491 |
if ($atom_link and isset($attrs['href'])) { |
| 492 |
$this->append($elpath, $attrs['href']); |
| 493 |
} |
| 494 |
|
| 495 |
// add attributes |
| 496 |
if (count($attrs) > 0) { |
| 497 |
$this->append($elpath.'@', join(',', array_keys($attrs))); |
| 498 |
foreach ($attrs as $attr => $value) { |
| 499 |
$this->append($elpath.'@'.$attr, $value); |
| 500 |
} |
| 501 |
} |
| 502 |
} |
| 503 |
} |
| 504 |
|
| 505 |
function feed_cdata ($p, $text) { |
| 506 |
if ($this->incontent) { |
| 507 |
if ($this->xml_escape) { $text = htmlspecialchars($text, ENT_COMPAT, $this->encoding); } |
| 508 |
$this->append_content( $text ); |
| 509 |
} else { |
| 510 |
$current_el = join('_', array_reverse($this->stack['element'])); |
| 511 |
$this->append($current_el, $text); |
| 512 |
} |
| 513 |
} |
| 514 |
|
| 515 |
function feed_end_element ($p, $el) { |
| 516 |
$closer = $this->namespace($el); |
| 517 |
|
| 518 |
if ( $this->incontent ) { |
| 519 |
$opener = array_pop($this->incontent); |
| 520 |
|
| 521 |
// balance tags properly |
| 522 |
// note: i don't think this is actually neccessary |
| 523 |
if ($opener != $closer) { |
| 524 |
array_push($this->incontent, $opener); |
| 525 |
$this->append_content("<$el />"); |
| 526 |
} elseif ($this->incontent) { // are we in the content construct still? |
| 527 |
if ((count($this->incontent) > 1) or !$this->exclude_top) { |
| 528 |
if ($closer['effective']=='xhtml') { |
| 529 |
$tag = $closer['element']; |
| 530 |
} |
| 531 |
else { |
| 532 |
$tag = $el; |
| 533 |
} |
| 534 |
$this->append_content("</$tag>"); |
| 535 |
} |
| 536 |
} else { // if we're done with the content construct, shift the opening of the content construct off the normal stack |
| 537 |
array_shift( $this->stack['element'] ); |
| 538 |
} |
| 539 |
} |
| 540 |
elseif ($closer['effective'] == '') { |
| 541 |
$el = strtolower($closer['element']); |
| 542 |
if ( $el == 'item' or $el == 'entry' ) { |
| 543 |
$this->items[] = $this->current_item; |
| 544 |
$this->current_item = array(); |
| 545 |
$this->initem = false; |
| 546 |
$this->current_category = 0; |
| 547 |
} |
| 548 |
elseif ($this->feed_type == RSS and $el == 'textinput' ) { |
| 549 |
$this->intextinput = false; |
| 550 |
} |
| 551 |
elseif ($this->feed_type == RSS and $el == 'image' ) { |
| 552 |
$this->inimage = false; |
| 553 |
} |
| 554 |
elseif ($el == 'channel' or $el == 'feed' ) { |
| 555 |
$this->inchannel = false; |
| 556 |
} else { |
| 557 |
$nsc = $closer['canonical']; $nse = $closer['element']; |
| 558 |
if (isset($this->_XMLBASE_RESOLVE[$nsc][$nse]['*content'])) { |
| 559 |
// Resolve relative URI in content of tag |
| 560 |
$this->dereference_current_element(); |
| 561 |
} |
| 562 |
array_shift( $this->stack['element'] ); |
| 563 |
} |
| 564 |
} else { |
| 565 |
$nsc = $closer['canonical']; $nse = strtolower($closer['element']); |
| 566 |
if (isset($this->_XMLBASE_RESOLVE[$nsc][$nse]['*content'])) { |
| 567 |
// Resolve relative URI in content of tag |
| 568 |
$this->dereference_current_element(); |
| 569 |
} |
| 570 |
array_shift( $this->stack['element'] ); |
| 571 |
} |
| 572 |
|
| 573 |
if ( !$this->incontent ) { // Don't munge the namespace after finishing with elements in namespaced content constructs -CWJ |
| 574 |
$this->current_namespace = false; |
| 575 |
} |
| 576 |
array_pop($this->stack['xmlns']); |
| 577 |
array_pop($this->stack['xml:base']); |
| 578 |
} |
| 579 |
|
| 580 |
// Namespace handling functions |
| 581 |
function namespace ($element) { |
| 582 |
$namespaces = end($this->stack['xmlns']); |
| 583 |
$ns = ''; |
| 584 |
if ( strpos( $element, ':' ) ) { |
| 585 |
list($ns, $element) = split( ':', $element, 2); |
| 586 |
} |
| 587 |
|
| 588 |
$uri = (isset($namespaces[$ns]) ? $namespaces[$ns] : null); |
| 589 |
|
| 590 |
if (!is_null($uri)) { |
| 591 |
$canonical = ( |
| 592 |
isset($this->_XMLNS_FAMILIAR[$uri]) |
| 593 |
? $this->_XMLNS_FAMILIAR[$uri] |
| 594 |
: $uri |
| 595 |
); |
| 596 |
} else { |
| 597 |
$canonical = $ns; |
| 598 |
} |
| 599 |
|
| 600 |
if (in_array($canonical, $this->root_namespaces)) { |
| 601 |
$effective = ''; |
| 602 |
} else { |
| 603 |
$effective = $canonical; |
| 604 |
} |
| 605 |
|
| 606 |
return array('effective' => $effective, 'canonical' => $canonical, 'prefix' => $ns, 'uri' => $uri, 'element' => $element); |
| 607 |
} |
| 608 |
|
| 609 |
// Utility functions for accessing data structure |
| 610 |
|
| 611 |
// for smart, namespace-aware methods... |
| 612 |
function magpie_data ($el, $method, $text = NULL) { |
| 613 |
$ret = NULL; |
| 614 |
if ($el) { |
| 615 |
if (is_array($method)) { |
| 616 |
$el = $this->{$method['key']}($el); |
| 617 |
$method = $method['value']; |
| 618 |
} |
| 619 |
|
| 620 |
if ( $this->current_namespace ) { |
| 621 |
if ( $this->initem ) { |
| 622 |
$ret = $this->{$method} ( |
| 623 |
$this->current_item[ $this->current_namespace ][ $el ], |
| 624 |
$text |
| 625 |
); |
| 626 |
} |
| 627 |
elseif ($this->inchannel) { |
| 628 |
$ret = $this->{$method} ( |
| 629 |
$this->channel[ $this->current_namespace][ $el ], |
| 630 |
$text |
| 631 |
); |
| 632 |
} |
| 633 |
elseif ($this->intextinput) { |
| 634 |
$ret = $this->{$method} ( |
| 635 |
$this->textinput[ $this->current_namespace][ $el ], |
| 636 |
$text |
| 637 |
); |
| 638 |
} |
| 639 |
elseif ($this->inimage) { |
| 640 |
$ret = $this->{$method} ( |
| 641 |
$this->image[ $this->current_namespace ][ $el ], $text ); |
| 642 |
} |
| 643 |
} |
| 644 |
else { |
| 645 |
if ( $this->initem ) { |
| 646 |
$ret = $this->{$method} ( |
| 647 |
$this->current_item[ $el ], $text); |
| 648 |
} |
| 649 |
elseif ($this->intextinput) { |
| 650 |
$ret = $this->{$method} ( |
| 651 |
$this->textinput[ $el ], $text ); |
| 652 |
} |
| 653 |
elseif ($this->inimage) { |
| 654 |
$ret = $this->{$method} ( |
| 655 |
$this->image[ $el ], $text ); |
| 656 |
} |
| 657 |
elseif ($this->inchannel) { |
| 658 |
$ret = $this->{$method} ( |
| 659 |
$this->channel[ $el ], $text ); |
| 660 |
} |
| 661 |
} |
| 662 |
} |
| 663 |
return $ret; |
| 664 |
} |
| 665 |
|
| 666 |
function concat (&$str1, $str2="") { |
| 667 |
if (!isset($str1) ) { |
| 668 |
$str1=""; |
| 669 |
} |
| 670 |
$str1 .= $str2; |
| 671 |
} |
| 672 |
|
| 673 |
function retrieve_value (&$el, $text /*ignore*/) { |
| 674 |
return $el; |
| 675 |
} |
| 676 |
function replace_value (&$el, $text) { |
| 677 |
$el = $text; |
| 678 |
} |
| 679 |
function counter_key ($el) { |
| 680 |
return $el.'#'; |
| 681 |
} |
| 682 |
|
| 683 |
|
| 684 |
function append_content($text) { |
| 685 |
$construct = reset($this->incontent); |
| 686 |
$ns = $construct['effective']; |
| 687 |
|
| 688 |
// Keeping data about parent elements is necessary to |
| 689 |
// properly handle atom:source and its children elements |
| 690 |
$tag = join('_', array_reverse($this->stack['element'])); |
| 691 |
|
| 692 |
if ( $this->initem ) { |
| 693 |
if ($ns) { |
| 694 |
$this->concat( $this->current_item[$ns][$tag], $text ); |
| 695 |
} else { |
| 696 |
$this->concat( $this->current_item[$tag], $text ); |
| 697 |
} |
| 698 |
} |
| 699 |
elseif ( $this->inchannel ) { |
| 700 |
if ($this->current_namespace) { |
| 701 |
$this->concat( $this->channel[$ns][$tag], $text ); |
| 702 |
} else { |
| 703 |
$this->concat( $this->channel[$tag], $text ); |
| 704 |
} |
| 705 |
} |
| 706 |
} |
| 707 |
|
| 708 |
// smart append - field and namespace aware |
| 709 |
function append($el, $text) { |
| 710 |
$this->magpie_data($el, 'concat', $text); |
| 711 |
} |
| 712 |
|
| 713 |
function dereference_current_element () { |
| 714 |
$el = join('_', array_reverse($this->stack['element'])); |
| 715 |
$base = end($this->stack['xml:base']); |
| 716 |
$uri = $this->magpie_data($el, 'retrieve_value'); |
| 717 |
$this->magpie_data($el, 'replace_value', Relative_URI::resolve($uri, $base)); |
| 718 |
} |
| 719 |
|
| 720 |
// smart count - field and namespace aware |
| 721 |
function element_count ($el, $set = NULL) { |
| 722 |
if (!is_null($set)) { |
| 723 |
$ret = $this->magpie_data($el, array('key' => 'counter_key', 'value' => 'replace_value'), $set); |
| 724 |
} |
| 725 |
$ret = $this->magpie_data($el, array('key' => 'counter_key', 'value' => 'retrieve_value')); |
| 726 |
return ($ret ? $ret : 0); |
| 727 |
} |
| 728 |
|
| 729 |
function normalize_enclosure (&$source, $from, &$dest, $to, $i) { |
| 730 |
$id_from = $this->element_id($from, $i); |
| 731 |
$id_to = $this->element_id($to, $i); |
| 732 |
if (isset($source["{$id_from}@"])) { |
| 733 |
foreach (explode(',', $source["{$id_from}@"]) as $attr) { |
| 734 |
if ($from=='link_enclosure' and $attr=='href') { // from Atom |
| 735 |
$dest["{$id_to}@url"] = $source["{$id_from}@{$attr}"]; |
| 736 |
$dest["{$id_to}"] = $source["{$id_from}@{$attr}"]; |
| 737 |
} |
| 738 |
elseif ($from=='enclosure' and $attr=='url') { // from RSS |
| 739 |
$dest["{$id_to}@href"] = $source["{$id_from}@{$attr}"]; |
| 740 |
$dest["{$id_to}"] = $source["{$id_from}@{$attr}"]; |
| 741 |
} |
| 742 |
else { |
| 743 |
$dest["{$id_to}@{$attr}"] = $source["{$id_from}@{$attr}"]; |
| 744 |
} |
| 745 |
} |
| 746 |
} |
| 747 |
} |
| 748 |
|
| 749 |
function normalize_atom_person (&$source, $person, &$dest, $to, $i) { |
| 750 |
$id = $this->element_id($person, $i); |
| 751 |
$id_to = $this->element_id($to, $i); |
| 752 |
|
| 753 |
// Atom 0.3 <=> Atom 1.0 |
| 754 |
if ($this->feed_version >= 1.0) { $used = 'uri'; $norm = 'url'; } |
| 755 |
else { $used = 'url'; $norm = 'uri'; } |
| 756 |
|
| 757 |
if (isset($source["{$id}_{$used}"])) { |
| 758 |
$dest["{$id_to}_{$norm}"] = $source["{$id}_{$used}"]; |
| 759 |
} |
| 760 |
|
| 761 |
// Atom to RSS 2.0 and Dublin Core |
| 762 |
// RSS 2.0 person strings should be valid e-mail addresses if possible. |
| 763 |
if (isset($source["{$id}_email"])) { |
| 764 |
$rss_author = $source["{$id}_email"]; |
| 765 |
} |
| 766 |
if (isset($source["{$id}_name"])) { |
| 767 |
$rss_author = $source["{$id}_name"] |
| 768 |
. (isset($rss_author) ? " <$rss_author>" : ''); |
| 769 |
} |
| 770 |
if (isset($rss_author)) { |
| 771 |
$source[$id] = $rss_author; // goes to top-level author or contributor |
| 772 |
$dest[$id_to] = $rss_author; // goes to dc:creator or dc:contributor |
| 773 |
} |
| 774 |
} |
| 775 |
|
| 776 |
// Normalize Atom 1.0 and RSS 2.0 categories to Dublin Core... |
| 777 |
function normalize_category (&$source, $from, &$dest, $to, $i) { |
| 778 |
$cat_id = $this->element_id($from, $i); |
| 779 |
$dc_id = $this->element_id($to, $i); |
| 780 |
|
| 781 |
// first normalize category elements: Atom 1.0 <=> RSS 2.0 |
| 782 |
if ( isset($source["{$cat_id}@term"]) ) { // category identifier |
| 783 |
$source[$cat_id] = $source["{$cat_id}@term"]; |
| 784 |
} elseif ( $this->feed_type == RSS ) { |
| 785 |
$source["{$cat_id}@term"] = $source[$cat_id]; |
| 786 |
} |
| 787 |
|
| 788 |
if ( isset($source["{$cat_id}@scheme"]) ) { // URI to taxonomy |
| 789 |
$source["{$cat_id}@domain"] = $source["{$cat_id}@scheme"]; |
| 790 |
} elseif ( isset($source["{$cat_id}@domain"]) ) { |
| 791 |
$source["{$cat_id}@scheme"] = $source["{$cat_id}@domain"]; |
| 792 |
} |
| 793 |
|
| 794 |
// Now put the identifier into dc:subject |
| 795 |
$dest[$dc_id] = $source[$cat_id]; |
| 796 |
} |
| 797 |
|
| 798 |
// ... or vice versa |
| 799 |
function normalize_dc_subject (&$source, $from, &$dest, $to, $i) { |
| 800 |
$dc_id = $this->element_id($from, $i); |
| 801 |
$cat_id = $this->element_id($to, $i); |
| 802 |
|
| 803 |
$dest[$cat_id] = $source[$dc_id]; // RSS 2.0 |
| 804 |
$dest["{$cat_id}@term"] = $source[$dc_id]; // Atom 1.0 |
| 805 |
} |
| 806 |
|
| 807 |
// simplify the logic for normalize(). Makes sure that count of elements and |
| 808 |
// each of multiple elements is normalized properly. If you need to mess |
| 809 |
// with things like attributes or change formats or the like, pass it a |
| 810 |
// callback to handle each element. |
| 811 |
function normalize_element (&$source, $from, &$dest, $to, $via = NULL) { |
| 812 |
if (isset($source[$from]) or isset($source["{$from}#"])) { |
| 813 |
if (isset($source["{$from}#"])) { |
| 814 |
$n = $source["{$from}#"]; |
| 815 |
$dest["{$to}#"] = $source["{$from}#"]; |
| 816 |
} |
| 817 |
else { $n = 1; } |
| 818 |
|
| 819 |
for ($i = 1; $i <= $n; $i++) { |
| 820 |
if (isset($via)) { // custom callback for ninja attacks |
| 821 |
$this->{$via}($source, $from, $dest, $to, $i); |
| 822 |
} |
| 823 |
else { // just make it the same |
| 824 |
$from_id = $this->element_id($from, $i); |
| 825 |
$to_id = $this->element_id($to, $i); |
| 826 |
$dest[$to_id] = $source[$from_id]; |
| 827 |
} |
| 828 |
} |
| 829 |
} |
| 830 |
} |
| 831 |
|
| 832 |
function normalize () { |
| 833 |
// if atom populate rss fields and normalize 0.3 and 1.0 feeds |
| 834 |
if ( $this->is_atom() ) { |
| 835 |
// Atom 1.0 elements <=> Atom 0.3 elements (Thanks, o brilliant wordsmiths of the Atom 1.0 standard!) |
| 836 |
if ($this->feed_version < 1.0) { |
| 837 |
$this->normalize_element($this->channel, 'tagline', $this->channel, 'subtitle'); |
| 838 |
$this->normalize_element($this->channel, 'copyright', $this->channel, 'rights'); |
| 839 |
$this->normalize_element($this->channel, 'modified', $this->channel, 'updated'); |
| 840 |
} else { |
| 841 |
$this->normalize_element($this->channel, 'subtitle', $this->channel, 'tagline'); |
| 842 |
$this->normalize_element($this->channel, 'rights', $this->channel, 'copyright'); |
| 843 |
$this->normalize_element($this->channel, 'updated', $this->channel, 'modified'); |
| 844 |
} |
| 845 |
$this->normalize_element($this->channel, 'author', $this->channel['dc'], 'creator', 'normalize_atom_person'); |
| 846 |
$this->normalize_element($this->channel, 'contributor', $this->channel['dc'], 'contributor', 'normalize_atom_person'); |
| 847 |
|
| 848 |
// Atom elements to RSS elements |
| 849 |
$this->normalize_element($this->channel, 'subtitle', $this->channel, 'description'); |
| 850 |
|
| 851 |
if ( isset($this->channel['logo']) ) { |
| 852 |
$this->normalize_element($this->channel, 'logo', $this->image, 'url'); |
| 853 |
$this->normalize_element($this->channel, 'link', $this->image, 'link'); |
| 854 |
$this->normalize_element($this->channel, 'title', $this->image, 'title'); |
| 855 |
} |
| 856 |
|
| 857 |
for ( $i = 0; $i < count($this->items); $i++) { |
| 858 |
$item = $this->items[$i]; |
| 859 |
|
| 860 |
// Atom 1.0 elements <=> Atom 0.3 elements |
| 861 |
if ($this->feed_version < 1.0) { |
| 862 |
$this->normalize_element($item, 'modified', $item, 'updated'); |
| 863 |
$this->normalize_element($item, 'issued', $item, 'published'); |
| 864 |
} else { |
| 865 |
$this->normalize_element($item, 'updated', $item, 'modified'); |
| 866 |
$this->normalize_element($item, 'published', $item, 'issued'); |
| 867 |
} |
| 868 |
|
| 869 |
// "If an atom:entry element does not contain |
| 870 |
// atom:author elements, then the atom:author elements |
| 871 |
// of the contained atom:source element are considered |
| 872 |
// to apply. In an Atom Feed Document, the atom:author |
| 873 |
// elements of the containing atom:feed element are |
| 874 |
// considered to apply to the entry if there are no |
| 875 |
// atom:author elements in the locations described |
| 876 |
// above." <http://atompub.org/2005/08/17/draft-ietf-atompub-format-11.html#rfc.section.4.2.1> |
| 877 |
if (!isset($item["author#"])) { |
| 878 |
if (isset($item["source_author#"])) { // from aggregation source |
| 879 |
$source = $item; |
| 880 |
$author = "source_author"; |
| 881 |
} elseif (isset($this->channel["author#"])) { // from containing feed |
| 882 |
$source = $this->channel; |
| 883 |
$author = "author"; |
| 884 |
} else { |
| 885 |
$author = null; |
| 886 |
} |
| 887 |
|
| 888 |
if (!is_null($author)) { |
| 889 |
$item["author#"] = $source["{$author}#"]; |
| 890 |
for ($au = 1; $au <= $item["author#"]; $au++) { |
| 891 |
$id_to = $this->element_id('author', $au); |
| 892 |
$id_from = $this->element_id($author, $au); |
| 893 |
|
| 894 |
$item[$id_to] = $source[$id_from]; |
| 895 |
foreach (array('name', 'email', 'uri', 'url') as $what) { |
| 896 |
if (isset($source["{$id_from}_{$what}"])) { |
| 897 |
$item["{$id_to}_{$what}"] = $source["{$id_from}_{$what}"]; |
| 898 |
} |
| 899 |
} |
| 900 |
} |
| 901 |
} |
| 902 |
} |
| 903 |
|
| 904 |
// Atom elements to RSS elements |
| 905 |
$this->normalize_element($item, 'author', $item['dc'], 'creator', 'normalize_atom_person'); |
| 906 |
$this->normalize_element($item, 'contributor', $item['dc'], 'contributor', 'normalize_atom_person'); |
| 907 |
$this->normalize_element($item, 'summary', $item, 'description'); |
| 908 |
$this->normalize_element($item, 'atom_content', $item['content'], 'encoded'); |
| 909 |
$this->normalize_element($item, 'link_enclosure', $item, 'enclosure', 'normalize_enclosure'); |
| 910 |
|
| 911 |
// Categories |
| 912 |
if ( isset($item['category#']) ) { // Atom 1.0 categories to dc:subject and RSS 2.0 categories |
| 913 |
$this->normalize_element($item, 'category', $item['dc'], 'subject', 'normalize_category'); |
| 914 |
} |
| 915 |
elseif ( isset($item['dc']['subject#']) ) { // dc:subject to Atom 1.0 and RSS 2.0 categories |
| 916 |
$this->normalize_element($item['dc'], 'subject', $item, 'category', 'normalize_dc_subject'); |
| 917 |
} |
| 918 |
|
| 919 |
// Normalized item timestamp |
| 920 |
$atom_date = (isset($item['published']) ) ? $item['published'] : $item['updated']; |
| 921 |
if ( $atom_date ) { |
| 922 |
$epoch = @parse_w3cdtf($atom_date); |
| 923 |
if ($epoch and $epoch > 0) { |
| 924 |
$item['date_timestamp'] = $epoch; |
| 925 |
} |
| 926 |
} |
| 927 |
|
| 928 |
$this->items[$i] = $item; |
| 929 |
} |
| 930 |
} |
| 931 |
elseif ( $this->is_rss() ) { |
| 932 |
// RSS elements to Atom elements |
| 933 |
$this->normalize_element($this->channel, 'description', $this->channel, 'tagline'); // Atom 0.3 |
| 934 |
$this->normalize_element($this->channel, 'description', $this->channel, 'subtitle'); // Atom 1.0 (yay wordsmithing!) |
| 935 |
$this->normalize_element($this->image, 'url', $this->channel, 'logo'); |
| 936 |
|
| 937 |
for ( $i = 0; $i < count($this->items); $i++) { |
| 938 |
$item = $this->items[$i]; |
| 939 |
|
| 940 |
// RSS elements to Atom elements |
| 941 |
$this->normalize_element($item, 'description', $item, 'summary'); |
| 942 |
$this->normalize_element($item, 'enclosure', $item, 'link_enclosure', 'normalize_enclosure'); |
| 943 |
|
| 944 |
// Categories |
| 945 |
if ( isset($item['category#']) ) { // RSS 2.0 categories to dc:subject and Atom 1.0 categories |
| 946 |
$this->normalize_element($item, 'category', $item['dc'], 'subject', 'normalize_category'); |
| 947 |
} |
| 948 |
elseif ( isset($item['dc']['subject#']) ) { // dc:subject to Atom 1.0 and RSS 2.0 categories |
| 949 |
$this->normalize_element($item['dc'], 'subject', $item, 'category', 'normalize_dc_subject'); |
| 950 |
} |
| 951 |
|
| 952 |
// Normalized item timestamp |
| 953 |
if ( $this->is_rss() == '1.0' and isset($item['dc']['date']) ) { |
| 954 |
$epoch = @parse_w3cdtf($item['dc']['date']); |
| 955 |
if ($epoch and $epoch > 0) { |
| 956 |
$item['date_timestamp'] = $epoch; |
| 957 |
} |
| 958 |
} |
| 959 |
elseif ( isset($item['pubdate']) ) { |
| 960 |
$epoch = @strtotime($item['pubdate']); |
| 961 |
if ($epoch > 0) { |
| 962 |
$item['date_timestamp'] = $epoch; |
| 963 |
} |
| 964 |
} |
| 965 |
|
| 966 |
$this->items[$i] = $item; |
| 967 |
} |
| 968 |
} |
| 969 |
} |
| 970 |
|
| 971 |
|
| 972 |
function is_rss () { |
| 973 |
if ( $this->feed_type == RSS ) { |
| 974 |
return $this->feed_version; |
| 975 |
} |
| 976 |
else { |
| 977 |
return false; |
| 978 |
} |
| 979 |
} |
| 980 |
|
| 981 |
function is_atom() { |
| 982 |
if ( $this->feed_type == ATOM ) { |
| 983 |
return $this->feed_version; |
| 984 |
} |
| 985 |
else { |
| 986 |
return false; |
| 987 |
} |
| 988 |
} |
| 989 |
|
| 990 |
/** |
| 991 |
* return XML parser, and possibly re-encoded source |
| 992 |
* |
| 993 |
*/ |
| 994 |
function create_parser($source, $out_enc, $in_enc, $detect) { |
| 995 |
if ( substr(phpversion(),0,1) == 5) { |
| 996 |
$parser = $this->php5_create_parser($in_enc, $detect); |
| 997 |
} |
| 998 |
else { |
| 999 |
list($parser, $source) = $this->php4_create_parser($source, $in_enc, $detect); |
| 1000 |
} |
| 1001 |
if ($out_enc) { |
| 1002 |
$this->encoding = $out_enc; |
| 1003 |
xml_parser_set_option($parser, XML_OPTION_TARGET_ENCODING, $out_enc); |
| 1004 |
} |
| 1005 |
xml_parser_set_option($parser, XML_OPTION_CASE_FOLDING, false); |
| 1006 |
return array($parser, $source); |
| 1007 |
} |
| 1008 |
|
| 1009 |
/** |
| 1010 |
* Instantiate an XML parser under PHP5 |
| 1011 |
* |
| 1012 |
* PHP5 will do a fine job of detecting input encoding |
| 1013 |
* if passed an empty string as the encoding. |
| 1014 |
* |
| 1015 |
* All hail libxml2! |
| 1016 |
* |
| 1017 |
*/ |
| 1018 |
function php5_create_parser($in_enc, $detect) { |
| 1019 |
// by default php5 does a fine job of detecting input encodings |
| 1020 |
if(!$detect && $in_enc) { |
| 1021 |
return xml_parser_create($in_enc); |
| 1022 |
} |
| 1023 |
else { |
| 1024 |
return xml_parser_create(''); |
| 1025 |
} |
| 1026 |
} |
| 1027 |
|
| 1028 |
/** |
| 1029 |
* Instaniate an XML parser under PHP4 |
| 1030 |
* |
| 1031 |
* Unfortunately PHP4's support for character encodings |
| 1032 |
* and especially XML and character encodings sucks. As |
| 1033 |
* long as the documents you parse only contain characters |
| 1034 |
* from the ISO-8859-1 character set (a superset of ASCII, |
| 1035 |
* and a subset of UTF-8) you're fine. However once you |
| 1036 |
* step out of that comfy little world things get mad, bad, |
| 1037 |
* and dangerous to know. |
| 1038 |
* |
| 1039 |
* The following code is based on SJM's work with FoF |
| 1040 |
* @see http://minutillo.com/steve/weblog/2004/6/17/php-xml-and-character-encodings-a-tale-of-sadness-rage-and-data-loss |
| 1041 |
* |
| 1042 |
*/ |
| 1043 |
function php4_create_parser($source, $in_enc, $detect) { |
| 1044 |
if ( !$detect ) { |
| 1045 |
return array(xml_parser_create($in_enc), $source); |
| 1046 |
} |
| 1047 |
|
| 1048 |
if (!$in_enc) { |
| 1049 |
if (preg_match('/<?xml.*encoding=[\'"](.*?)[\'"].*?>/m', $source, $m)) { |
| 1050 |
$in_enc = strtoupper($m[1]); |
| 1051 |
$this->source_encoding = $in_enc; |
| 1052 |
} |
| 1053 |
else { |
| 1054 |
$in_enc = 'UTF-8'; |
| 1055 |
} |
| 1056 |
} |
| 1057 |
|
| 1058 |
if ($this->known_encoding($in_enc)) { |
| 1059 |
return array(xml_parser_create($in_enc), $source); |
| 1060 |
} |
| 1061 |
|
| 1062 |
// the dectected encoding is not one of the simple encodings PHP knows |
| 1063 |
|
| 1064 |
// attempt to use the iconv extension to |
| 1065 |
// cast the XML to a known encoding |
| 1066 |
// @see http://php.net/iconv |
| 1067 |
|
| 1068 |
if (function_exists('iconv')) { |
| 1069 |
$encoded_source = iconv($in_enc,'UTF-8', $source); |
| 1070 |
if ($encoded_source) { |
| 1071 |
return array(xml_parser_create('UTF-8'), $encoded_source); |
| 1072 |
} |
| 1073 |
} |
| 1074 |
|
| 1075 |
// iconv didn't work, try mb_convert_encoding |
| 1076 |
// @see http://php.net/mbstring |
| 1077 |
if(function_exists('mb_convert_encoding')) { |
| 1078 |
$encoded_source = mb_convert_encoding($source, 'UTF-8', $in_enc ); |
| 1079 |
if ($encoded_source) { |
| 1080 |
return array(xml_parser_create('UTF-8'), $encoded_source); |
| 1081 |
} |
| 1082 |
} |
| 1083 |
|
| 1084 |
// else |
| 1085 |
$this->error("Feed is in an unsupported character encoding. ($in_enc) " . |
| 1086 |
"You may see strange artifacts, and mangled characters.", |
| 1087 |
E_USER_NOTICE); |
| 1088 |
|
| 1089 |
return array(xml_parser_create(), $source); |
| 1090 |
} |
| 1091 |
|
| 1092 |
function known_encoding($enc) { |
| 1093 |
$enc = strtoupper($enc); |
| 1094 |
if ( in_array($enc, $this->_KNOWN_ENCODINGS) ) { |
| 1095 |
return $enc; |
| 1096 |
} |
| 1097 |
else { |
| 1098 |
return false; |
| 1099 |
} |
| 1100 |
} |
| 1101 |
|
| 1102 |
function error ($errormsg, $lvl=E_USER_WARNING) { |
| 1103 |
// append PHP's error message if track_errors enabled |
| 1104 |
if ( isset($php_errormsg) ) { |
| 1105 |
$errormsg .= " ($php_errormsg)"; |
| 1106 |
} |
| 1107 |
if ( MAGPIE_DEBUG ) { |
| 1108 |
trigger_error( $errormsg, $lvl); |
| 1109 |
} |
| 1110 |
else { |
| 1111 |
error_log( $errormsg, 0); |
| 1112 |
} |
| 1113 |
|
| 1114 |
$notices = E_USER_NOTICE|E_NOTICE; |
| 1115 |
if ( $lvl&$notices ) { |
| 1116 |
$this->WARNING = $errormsg; |
| 1117 |
} else { |
| 1118 |
$this->ERROR = $errormsg; |
| 1119 |
} |
| 1120 |
} |
| 1121 |
|
| 1122 |
// magic ID function for multiple elemenets. |
| 1123 |
// can be called as static MagpieRSS::element_id() |
| 1124 |
function element_id ($el, $counter) { |
| 1125 |
return $el . (($counter > 1) ? '#'.$counter : ''); |
| 1126 |
} |
| 1127 |
|
| 1128 |
function map_attrs($k, $v) { |
| 1129 |
return $k.'="'.htmlspecialchars($v, ENT_COMPAT, $this->encoding).'"'; |
| 1130 |
} |
| 1131 |
|
| 1132 |
function accepts_namespaced_xml ($attrs) { |
| 1133 |
$mode = (isset($attrs['mode']) ? trim(strtolower($attrs['mode'])) : 'xml'); |
| 1134 |
$type = (isset($attrs['type']) ? trim(strtolower($attrs['type'])) : null); |
| 1135 |
if ($this->feed_type == ATOM and $this->feed_version < 1.0) { |
| 1136 |
if ($mode=='xml' and preg_match(':[/+](html|xml)$:i', $type)) { |
| 1137 |
$ret = true; |
| 1138 |
} else { |
| 1139 |
$ret = false; |
| 1140 |
} |
| 1141 |
} elseif ($this->feed_type == ATOM and $this->feed_version >= 1.0) { |
| 1142 |
if ($type=='xhtml' or preg_match(':[/+]xml$:i', $type)) { |
| 1143 |
$ret = true; |
| 1144 |
} else { |
| 1145 |
$ret = false; |
| 1146 |
} |
| 1147 |
} else { |
| 1148 |
$ret = false; // Don't munge unless you're sure |
| 1149 |
} |
| 1150 |
return $ret; |
| 1151 |
} |
| 1152 |
} // end class RSS |
| 1153 |
|
| 1154 |
|
| 1155 |
// patch to support medieval versions of PHP4.1.x, |
| 1156 |
// courtesy, Ryan Currie, ryan@digibliss.com |
| 1157 |
|
| 1158 |
if (!function_exists('array_change_key_case')) { |
| 1159 |
define("CASE_UPPER",1); |
| 1160 |
define("CASE_LOWER",0); |
| 1161 |
|
| 1162 |
|
| 1163 |
function array_change_key_case($array,$case=CASE_LOWER) { |
| 1164 |
if ($case==CASE_LOWER) $cmd='strtolower'; |
| 1165 |
elseif ($case==CASE_UPPER) $cmd='strtoupper'; |
| 1166 |
foreach($array as $key=>$value) { |
| 1167 |
$output[$cmd($key)]=$value; |
| 1168 |
} |
| 1169 |
return $output; |
| 1170 |
} |
| 1171 |
|
| 1172 |
} |
| 1173 |
|
| 1174 |
################################################################################ |
| 1175 |
## WordPress: Load in Snoopy from wp-includes ################################## |
| 1176 |
################################################################################ |
| 1177 |
|
| 1178 |
require_once( dirname(__FILE__) . '/class-snoopy.php'); |
| 1179 |
|
| 1180 |
################################################################################ |
| 1181 |
## rss_fetch.inc: from MagpieRSS 0.8a ########################################## |
| 1182 |
################################################################################ |
| 1183 |
|
| 1184 |
/*=======================================================================*\ |
| 1185 |
Function: fetch_rss: |
| 1186 |
Purpose: return RSS object for the give url |
| 1187 |
maintain the cache |
| 1188 |
Input: url of RSS file |
| 1189 |
Output: parsed RSS object (see rss_parse.inc) |
| 1190 |
|
| 1191 |
NOTES ON CACHEING: |
| 1192 |
If caching is on (MAGPIE_CACHE_ON) fetch_rss will first check the cache. |
| 1193 |
|
| 1194 |
NOTES ON RETRIEVING REMOTE FILES: |
| 1195 |
If conditional gets are on (MAGPIE_CONDITIONAL_GET_ON) fetch_rss will |
| 1196 |
return a cached object, and touch the cache object upon recieving a |
| 1197 |
304. |
| 1198 |
|
| 1199 |
NOTES ON FAILED REQUESTS: |
| 1200 |
If there is an HTTP error while fetching an RSS object, the cached |
| 1201 |
version will be return, if it exists (and if MAGPIE_CACHE_FRESH_ONLY is off) |
| 1202 |
\*=======================================================================*/ |
| 1203 |
|
| 1204 |
define('MAGPIE_VERSION', '0.85'); |
| 1205 |
|
| 1206 |
$MAGPIE_ERROR = ""; |
| 1207 |
|
| 1208 |
function fetch_rss ($url) { |
| 1209 |
// initialize constants |
| 1210 |
init(); |
| 1211 |
|
| 1212 |
if ( !isset($url) ) { |
| 1213 |
error("fetch_rss called without a url"); |
| 1214 |
return false; |
| 1215 |
} |
| 1216 |
|
| 1217 |
// if cache is disabled |
| 1218 |
if ( !MAGPIE_CACHE_ON ) { |
| 1219 |
// fetch file, and parse it |
| 1220 |
$resp = _fetch_remote_file( $url ); |
| 1221 |
if ( is_success( $resp->status ) ) { |
| 1222 |
return _response_to_rss( $resp, $url ); |
| 1223 |
} |
| 1224 |
else { |
| 1225 |
error("Failed to fetch $url and cache is off"); |
| 1226 |
return false; |
| 1227 |
} |
| 1228 |
} |
| 1229 |
// else cache is ON |
| 1230 |
else { |
| 1231 |
// Flow |
| 1232 |
// 1. check cache |
| 1233 |
// 2. if there is a hit, make sure its fresh |
| 1234 |
// 3. if cached obj fails freshness check, fetch remote |
| 1235 |
// 4. if remote fails, return stale object, or error |
| 1236 |
|
| 1237 |
$cache = new RSSCache( MAGPIE_CACHE_DIR, MAGPIE_CACHE_AGE ); |
| 1238 |
|
| 1239 |
if (MAGPIE_DEBUG and $cache->ERROR) { |
| 1240 |
debug($cache->ERROR, E_USER_WARNING); |
| 1241 |
} |
| 1242 |
|
| 1243 |
|
| 1244 |
$cache_status = 0; // response of check_cache |
| 1245 |
$request_headers = array(); // HTTP headers to send with fetch |
| 1246 |
$rss = 0; // parsed RSS object |
| 1247 |
$errormsg = 0; // errors, if any |
| 1248 |
|
| 1249 |
// store parsed XML by desired output encoding |
| 1250 |
// as character munging happens at parse time |
| 1251 |
$cache_key = $url . MAGPIE_OUTPUT_ENCODING; |
| 1252 |
|
| 1253 |
if (!$cache->ERROR) { |
| 1254 |
// return cache HIT, MISS, or STALE |
| 1255 |
$cache_status = $cache->check_cache( $cache_key); |
| 1256 |
} |
| 1257 |
|
| 1258 |
// if object cached, and cache is fresh, return cached obj |
| 1259 |
if ( $cache_status == 'HIT' ) { |
| 1260 |
$rss = $cache->get( $cache_key ); |
| 1261 |
if ( isset($rss) and $rss ) { |
| 1262 |
// should be cache age |
| 1263 |
$rss->from_cache = 1; |
| 1264 |
if ( MAGPIE_DEBUG > 1) { |
| 1265 |
debug("MagpieRSS: Cache HIT", E_USER_NOTICE); |
| 1266 |
} |
| 1267 |
return $rss; |
| 1268 |
} |
| 1269 |
} |
| 1270 |
|
| 1271 |
// else attempt a conditional get |
| 1272 |
|
| 1273 |
// setup headers |
| 1274 |
if ( $cache_status == 'STALE' ) { |
| 1275 |
$rss = $cache->get( $cache_key ); |
| 1276 |
if ( $rss and $rss->etag and $rss->last_modified ) { |
| 1277 |
$request_headers['If-None-Match'] = $rss->etag; |
| 1278 |
$request_headers['If-Last-Modified'] = $rss->last_modified; |
| 1279 |
} |
| 1280 |
} |
| 1281 |
|
| 1282 |
$resp = _fetch_remote_file( $url, $request_headers ); |
| 1283 |
|
| 1284 |
if (isset($resp) and $resp) { |
| 1285 |
if ($resp->status == '304' ) { |
| 1286 |
// we have the most current copy |
| 1287 |
if ( MAGPIE_DEBUG > 1) { |
| 1288 |
debug("Got 304 for $url"); |
| 1289 |
} |
| 1290 |
// reset cache on 304 (at minutillo insistent prodding) |
| 1291 |
$cache->set($cache_key, $rss); |
| 1292 |
return $rss; |
| 1293 |
} |
| 1294 |
elseif ( is_success( $resp->status ) ) { |
| 1295 |
$rss = _response_to_rss( $resp, $url ); |
| 1296 |
if ( $rss ) { |
| 1297 |
if (MAGPIE_DEBUG > 1) { |
| 1298 |
debug("Fetch successful"); |
| 1299 |
} |
| 1300 |
// add object to cache |
| 1301 |
$cache->set( $cache_key, $rss ); |
| 1302 |
return $rss; |
| 1303 |
} |
| 1304 |
} |
| 1305 |
else { |
| 1306 |
$errormsg = "Failed to fetch $url "; |
| 1307 |
if ( $resp->status == '-100' ) { |
| 1308 |
$errormsg .= "(Request timed out after " . MAGPIE_FETCH_TIME_OUT . " seconds)"; |
| 1309 |
} |
| 1310 |
elseif ( $resp->error ) { |
| 1311 |
# compensate for Snoopy's annoying habbit to tacking |
| 1312 |
# on '\n' |
| 1313 |
$http_error = substr($resp->error, 0, -2); |
| 1314 |
$errormsg .= "(HTTP Error: $http_error)"; |
| 1315 |
} |
| 1316 |
else { |
| 1317 |
$errormsg .= "(HTTP Response: " . $resp->response_code .')'; |
| 1318 |
} |
| 1319 |
} |
| 1320 |
} |
| 1321 |
else { |
| 1322 |
$errormsg = "Unable to retrieve RSS file for unknown reasons."; |
| 1323 |
} |
| 1324 |
|
| 1325 |
// else fetch failed |
| 1326 |
|
| 1327 |
// attempt to return cached object |
| 1328 |
if ($rss) { |
| 1329 |
if ( MAGPIE_DEBUG ) { |
| 1330 |
debug("Returning STALE object for $url"); |
| 1331 |
} |
| 1332 |
return $rss; |
| 1333 |
} |
| 1334 |
|
| 1335 |
// else we totally failed |
| 1336 |
error( $errormsg ); |
| 1337 |
|
| 1338 |
return false; |
| 1339 |
|
| 1340 |
} // end if ( !MAGPIE_CACHE_ON ) { |
| 1341 |
} // end fetch_rss() |
| 1342 |
|
| 1343 |
/*=======================================================================*\ |
| 1344 |
Function: error |
| 1345 |
Purpose: set MAGPIE_ERROR, and trigger error |
| 1346 |
\*=======================================================================*/ |
| 1347 |
|
| 1348 |
function error ($errormsg, $lvl=E_USER_WARNING) { |
| 1349 |
global $MAGPIE_ERROR; |
| 1350 |
|
| 1351 |
// append PHP's error message if track_errors enabled |
| 1352 |
if ( isset($php_errormsg) ) { |
| 1353 |
$errormsg .= " ($php_errormsg)"; |
| 1354 |
} |
| 1355 |
if ( $errormsg ) { |
| 1356 |
$errormsg = "MagpieRSS: $errormsg"; |
| 1357 |
$MAGPIE_ERROR = $errormsg; |
| 1358 |
trigger_error( $errormsg, $lvl); |
| 1359 |
} |
| 1360 |
} |
| 1361 |
|
| 1362 |
function debug ($debugmsg, $lvl=E_USER_NOTICE) { |
| 1363 |
trigger_error("MagpieRSS [debug] $debugmsg", $lvl); |
| 1364 |
} |
| 1365 |
|
| 1366 |
/*=======================================================================*\ |
| 1367 |
Function: magpie_error |
| 1368 |
Purpose: accessor for the magpie error variable |
| 1369 |
\*=======================================================================*/ |
| 1370 |
function magpie_error ($errormsg="") { |
| 1371 |
global $MAGPIE_ERROR; |
| 1372 |
|
| 1373 |
if ( isset($errormsg) and $errormsg ) { |
| 1374 |
$MAGPIE_ERROR = $errormsg; |
| 1375 |
} |
| 1376 |
|
| 1377 |
return $MAGPIE_ERROR; |
| 1378 |
} |
| 1379 |
|
| 1380 |
/*=======================================================================*\ |
| 1381 |
Function: _fetch_remote_file |
| 1382 |
Purpose: retrieve an arbitrary remote file |
| 1383 |
Input: url of the remote file |
| 1384 |
headers to send along with the request (optional) |
| 1385 |
Output: an HTTP response object (see Snoopy.class.inc) |
| 1386 |
\*=======================================================================*/ |
| 1387 |
function _fetch_remote_file ($url, $headers = "" ) { |
| 1388 |
// Snoopy is an HTTP client in PHP |
| 1389 |
$client = new Snoopy(); |
| 1390 |
$client->agent = MAGPIE_USER_AGENT; |
| 1391 |
$client->read_timeout = MAGPIE_FETCH_TIME_OUT; |
| 1392 |
$client->use_gzip = MAGPIE_USE_GZIP; |
| 1393 |
if (is_array($headers) ) { |
| 1394 |
$client->rawheaders = $headers; |
| 1395 |
} |
| 1396 |
|
| 1397 |
@$client->fetch($url); |
| 1398 |
return $client; |
| 1399 |
|
| 1400 |
} |
| 1401 |
|
| 1402 |
/*=======================================================================*\ |
| 1403 |
Function: _response_to_rss |
| 1404 |
Purpose: parse an HTTP response object into an RSS object |
| 1405 |
Input: an HTTP response object (see Snoopy) |
| 1406 |
Output: parsed RSS object (see rss_parse) |
| 1407 |
\*=======================================================================*/ |
| 1408 |
function _response_to_rss ($resp, $url = null) { |
| 1409 |
$rss = new MagpieRSS( $resp->results, MAGPIE_OUTPUT_ENCODING, MAGPIE_INPUT_ENCODING, MAGPIE_DETECT_ENCODING, $url ); |
| 1410 |
|
| 1411 |
// if RSS parsed successfully |
| 1412 |
if ( $rss and !$rss->ERROR) { |
| 1413 |
$rss->http_status = $resp->status; |
| 1414 |
|
| 1415 |
// find Etag, and Last-Modified |
| 1416 |
foreach($resp->headers as $h) { |
| 1417 |
// 2003-03-02 - Nicola Asuni (www.tecnick.com) - fixed bug "Undefined offset: 1" |
| 1418 |
if (strpos($h, ": ")) { |
| 1419 |
list($field, $val) = explode(": ", $h, 2); |
| 1420 |
} |
| 1421 |
else { |
| 1422 |
$field = $h; |
| 1423 |
$val = ""; |
| 1424 |
} |
| 1425 |
|
| 1426 |
$rss->header[$field] = $val; |
| 1427 |
|
| 1428 |
if ( $field == 'ETag' ) { |
| 1429 |
$rss->etag = $val; |
| 1430 |
} |
| 1431 |
|
| 1432 |
if ( $field == 'Last-Modified' ) { |
| 1433 |
$rss->last_modified = $val; |
| 1434 |
} |
| 1435 |
} |
| 1436 |
|
| 1437 |
return $rss; |
| 1438 |
} // else construct error message |
| 1439 |
else { |
| 1440 |
$errormsg = "Failed to parse RSS file."; |
| 1441 |
|
| 1442 |
if ($rss) { |
| 1443 |
$errormsg .= " (" . $rss->ERROR . ")"; |
| 1444 |
} |
| 1445 |
error($errormsg); |
| 1446 |
|
| 1447 |
return false; |
| 1448 |
} // end if ($rss and !$rss->error) |
| 1449 |
} |
| 1450 |
|
| 1451 |
/*=======================================================================*\ |
| 1452 |
Function: init |
| 1453 |
Purpose: setup constants with default values |
| 1454 |
check for user overrides |
| 1455 |
\*=======================================================================*/ |
| 1456 |
function init () { |
| 1457 |
if ( defined('MAGPIE_INITALIZED') ) { |
| 1458 |
return; |
| 1459 |
} |
| 1460 |
else { |
| 1461 |
define('MAGPIE_INITALIZED', true); |
| 1462 |
} |
| 1463 |
|
| 1464 |
if ( !defined('MAGPIE_CACHE_ON') ) { |
| 1465 |
define('MAGPIE_CACHE_ON', true); |
| 1466 |
} |
| 1467 |
|
| 1468 |
if ( !defined('MAGPIE_CACHE_DIR') ) { |
| 1469 |
define('MAGPIE_CACHE_DIR', './cache'); |
| 1470 |
} |
| 1471 |
|
| 1472 |
if ( !defined('MAGPIE_CACHE_AGE') ) { |
| 1473 |
define('MAGPIE_CACHE_AGE', 60*60); // one hour |
| 1474 |
} |
| 1475 |
|
| 1476 |
if ( !defined('MAGPIE_CACHE_FRESH_ONLY') ) { |
| 1477 |
define('MAGPIE_CACHE_FRESH_ONLY', false); |
| 1478 |
} |
| 1479 |
|
| 1480 |
if ( !defined('MAGPIE_OUTPUT_ENCODING') ) { |
| 1481 |
define('MAGPIE_OUTPUT_ENCODING', 'ISO-8859-1'); |
| 1482 |
} |
| 1483 |
|
| 1484 |
if ( !defined('MAGPIE_INPUT_ENCODING') ) { |
| 1485 |
define('MAGPIE_INPUT_ENCODING', null); |
| 1486 |
} |
| 1487 |
|
| 1488 |
if ( !defined('MAGPIE_DETECT_ENCODING') ) { |
| 1489 |
define('MAGPIE_DETECT_ENCODING', true); |
| 1490 |
} |
| 1491 |
|
| 1492 |
if ( !defined('MAGPIE_DEBUG') ) { |
| 1493 |
define('MAGPIE_DEBUG', 0); |
| 1494 |
} |
| 1495 |
|
| 1496 |
if ( !defined('MAGPIE_USER_AGENT') ) { |
| 1497 |
$ua = 'MagpieRSS/'. MAGPIE_VERSION . ' (+http://magpierss.sf.net'; |
| 1498 |
|
| 1499 |
if ( MAGPIE_CACHE_ON ) { |
| 1500 |
$ua = $ua . ')'; |
| 1501 |
} |
| 1502 |
else { |
| 1503 |
$ua = $ua . '; No cache)'; |
| 1504 |
} |
| 1505 |
|
| 1506 |
define('MAGPIE_USER_AGENT', $ua); |
| 1507 |
} |
| 1508 |
|
| 1509 |
if ( !defined('MAGPIE_FETCH_TIME_OUT') ) { |
| 1510 |
define('MAGPIE_FETCH_TIME_OUT', 5); // 5 second timeout |
| 1511 |
} |
| 1512 |
|
| 1513 |
// use gzip encoding to fetch rss files if supported? |
| 1514 |
if ( !defined('MAGPIE_USE_GZIP') ) { |
| 1515 |
define('MAGPIE_USE_GZIP', true); |
| 1516 |
} |
| 1517 |
} |
| 1518 |
|
| 1519 |
// NOTE: the following code should really be in Snoopy, or at least |
| 1520 |
// somewhere other then rss_fetch! |
| 1521 |
|
| 1522 |
/*=======================================================================*\ |
| 1523 |
HTTP STATUS CODE PREDICATES |
| 1524 |
These functions attempt to classify an HTTP status code |
| 1525 |
based on RFC 2616 and RFC 2518. |
| 1526 |
|
| 1527 |
All of them take an HTTP status code as input, and return true or false |
| 1528 |
|
| 1529 |
All this code is adapted from LWP's HTTP::Status. |
| 1530 |
\*=======================================================================*/ |
| 1531 |
|
| 1532 |
|
| 1533 |
/*=======================================================================*\ |
| 1534 |
Function: is_info |
| 1535 |
Purpose: return true if Informational status code |
| 1536 |
\*=======================================================================*/ |
| 1537 |
function is_info ($sc) { |
| 1538 |
return $sc >= 100 && $sc < 200; |
| 1539 |
} |
| 1540 |
|
| 1541 |
/*=======================================================================*\ |
| 1542 |
Function: is_success |
| 1543 |
Purpose: return true if Successful status code |
| 1544 |
\*=======================================================================*/ |
| 1545 |
function is_success ($sc) { |
| 1546 |
return $sc >= 200 && $sc < 300; |
| 1547 |
} |
| 1548 |
|
| 1549 |
/*=======================================================================*\ |
| 1550 |
Function: is_redirect |
| 1551 |
Purpose: return true if Redirection status code |
| 1552 |
\*=======================================================================*/ |
| 1553 |
function is_redirect ($sc) { |
| 1554 |
return $sc >= 300 && $sc < 400; |
| 1555 |
} |
| 1556 |
|
| 1557 |
/*=======================================================================*\ |
| 1558 |
Function: is_error |
| 1559 |
Purpose: return true if Error status code |
| 1560 |
\*=======================================================================*/ |
| 1561 |
function is_error ($sc) { |
| 1562 |
return $sc >= 400 && $sc < 600; |
| 1563 |
} |
| 1564 |
|
| 1565 |
/*=======================================================================*\ |
| 1566 |
Function: is_client_error |
| 1567 |
Purpose: return true if Error status code, and its a client error |
| 1568 |
\*=======================================================================*/ |
| 1569 |
function is_client_error ($sc) { |
| 1570 |
return $sc >= 400 && $sc < 500; |
| 1571 |
} |
| 1572 |
|
| 1573 |
/*=======================================================================*\ |
| 1574 |
Function: is_client_error |
| 1575 |
Purpose: return true if Error status code, and its a server error |
| 1576 |
\*=======================================================================*/ |
| 1577 |
function is_server_error ($sc) { |
| 1578 |
return $sc >= 500 && $sc < 600; |
| 1579 |
} |
| 1580 |
|
| 1581 |
################################################################################ |
| 1582 |
## rss_cache.inc: from WordPress 1.5 ########################################### |
| 1583 |
################################################################################ |
| 1584 |
|
| 1585 |
class RSSCache { |
| 1586 |
var $BASE_CACHE = 'wp-content/cache'; // where the cache files are stored |
| 1587 |
var $MAX_AGE = 43200; // when are files stale, default twelve hours |
| 1588 |
var $ERROR = ''; // accumulate error messages |
| 1589 |
|
| 1590 |
function RSSCache ($base='', $age='') { |
| 1591 |
if ( $base ) { |
| 1592 |
$this->BASE_CACHE = $base; |
| 1593 |
} |
| 1594 |
if ( $age ) { |
| 1595 |
$this->MAX_AGE = $age; |
| 1596 |
} |
| 1597 |
|
| 1598 |
} |
| 1599 |
|
| 1600 |
/*=======================================================================*\ |
| 1601 |
Function: set |
| 1602 |
Purpose: add an item to the cache, keyed on url |
| 1603 |
Input: url from wich the rss file was fetched |
| 1604 |
Output: true on sucess |
| 1605 |
\*=======================================================================*/ |
| 1606 |
function set ($url, $rss) { |
| 1607 |
global $wpdb; |
| 1608 |
$cache_option = 'rss_' . $this->file_name( $url ); |
| 1609 |
$cache_timestamp = 'rss_' . $this->file_name( $url ) . '_ts'; |
| 1610 |
|
| 1611 |
if ( !$wpdb->get_var("SELECT option_name FROM $wpdb->options WHERE option_name = '$cache_option'") ) |
| 1612 |
add_option($cache_option, '', '', 'no'); |
| 1613 |
if ( !$wpdb->get_var("SELECT option_name FROM $wpdb->options WHERE option_name = '$cache_timestamp'") ) |
| 1614 |
add_option($cache_timestamp, '', '', 'no'); |
| 1615 |
|
| 1616 |
update_option($cache_option, $rss); |
| 1617 |
update_option($cache_timestamp, time() ); |
| 1618 |
|
| 1619 |
return $cache_option; |
| 1620 |
} |
| 1621 |
|
| 1622 |
/*=======================================================================*\ |
| 1623 |
Function: get |
| 1624 |
Purpose: fetch an item from the cache |
| 1625 |
Input: url from wich the rss file was fetched |
| 1626 |
Output: cached object on HIT, false on MISS |
| 1627 |
\*=======================================================================*/ |
| 1628 |
function get ($url) { |
| 1629 |
$this->ERROR = ""; |
| 1630 |
$cache_option = 'rss_' . $this->file_name( $url ); |
| 1631 |
|
| 1632 |
if ( ! get_option( $cache_option ) ) { |
| 1633 |
$this->debug( |
| 1634 |
"Cache doesn't contain: $url (cache option: $cache_option)" |
| 1635 |
); |
| 1636 |
return 0; |
| 1637 |
} |
| 1638 |
|
| 1639 |
$rss = get_option( $cache_option ); |
| 1640 |
|
| 1641 |
return $rss; |
| 1642 |
} |
| 1643 |
|
| 1644 |
/*=======================================================================*\ |
| 1645 |
Function: check_cache |
| 1646 |
Purpose: check a url for membership in the cache |
| 1647 |
and whether the object is older then MAX_AGE (ie. STALE) |
| 1648 |
Input: url from wich the rss file was fetched |
| 1649 |
Output: cached object on HIT, false on MISS |
| 1650 |
\*=======================================================================*/ |
| 1651 |
function check_cache ( $url ) { |
| 1652 |
$this->ERROR = ""; |
| 1653 |
$cache_option = $this->file_name( $url ); |
| 1654 |
$cache_timestamp = 'rss_' . $this->file_name( $url ) . '_ts'; |
| 1655 |
|
| 1656 |
if ( $mtime = get_option($cache_timestamp) ) { |
| 1657 |
// find how long ago the file was added to the cache |
| 1658 |
// and whether that is longer then MAX_AGE |
| 1659 |
$age = time() - $mtime; |
| 1660 |
if ( $this->MAX_AGE > $age ) { |
| 1661 |
// object exists and is current |
| 1662 |
return 'HIT'; |
| 1663 |
} |
| 1664 |
else { |
| 1665 |
// object exists but is old |
| 1666 |
return 'STALE'; |
| 1667 |
} |
| 1668 |
} |
| 1669 |
else { |
| 1670 |
// object does not exist |
| 1671 |
return 'MISS'; |
| 1672 |
} |
| 1673 |
} |
| 1674 |
|
| 1675 |
/*=======================================================================*\ |
| 1676 |
Function: serialize |
| 1677 |
\*=======================================================================*/ |
| 1678 |
function serialize ( $rss ) { |
| 1679 |
return serialize( $rss ); |
| 1680 |
} |
| 1681 |
|
| 1682 |
/*=======================================================================*\ |
| 1683 |
Function: unserialize |
| 1684 |
\*=======================================================================*/ |
| 1685 |
function unserialize ( $data ) { |
| 1686 |
return unserialize( $data ); |
| 1687 |
} |
| 1688 |
|
| 1689 |
/*=======================================================================*\ |
| 1690 |
Function: file_name |
| 1691 |
Purpose: map url to location in cache |
| 1692 |
Input: url from wich the rss file was fetched |
| 1693 |
Output: a file name |
| 1694 |
\*=======================================================================*/ |
| 1695 |
function file_name ($url) { |
| 1696 |
return md5( $url ); |
| 1697 |
} |
| 1698 |
|
| 1699 |
/*=======================================================================*\ |
| 1700 |
Function: error |
| 1701 |
Purpose: register error |
| 1702 |
\*=======================================================================*/ |
| 1703 |
function error ($errormsg, $lvl=E_USER_WARNING) { |
| 1704 |
// append PHP's error message if track_errors enabled |
| 1705 |
if ( isset($php_errormsg) ) { |
| 1706 |
$errormsg .= " ($php_errormsg)"; |
| 1707 |
} |
| 1708 |
$this->ERROR = $errormsg; |
| 1709 |
if ( MAGPIE_DEBUG ) { |
| 1710 |
trigger_error( $errormsg, $lvl); |
| 1711 |
} |
| 1712 |
else { |
| 1713 |
error_log( $errormsg, 0); |
| 1714 |
} |
| 1715 |
} |
| 1716 |
function debug ($debugmsg, $lvl=E_USER_NOTICE) { |
| 1717 |
if ( MAGPIE_DEBUG ) { |
| 1718 |
$this->error("MagpieRSS [debug] $debugmsg", $lvl); |
| 1719 |
} |
| 1720 |
} |
| 1721 |
} |
| 1722 |
|
| 1723 |
################################################################################ |
| 1724 |
## rss_utils.inc: from MagpieRSS 0.8a ########################################## |
| 1725 |
################################################################################ |
| 1726 |
|
| 1727 |
/*======================================================================*\ |
| 1728 |
Function: parse_w3cdtf |
| 1729 |
Purpose: parse a W3CDTF date into unix epoch |
| 1730 |
|
| 1731 |
NOTE: http://www.w3.org/TR/NOTE-datetime |
| 1732 |
\*======================================================================*/ |
| 1733 |
|
| 1734 |
function parse_w3cdtf ( $date_str ) { |
| 1735 |
|
| 1736 |
# regex to match wc3dtf |
| 1737 |
$pat = "/^\s*(\d{4})(-(\d{2})(-(\d{2})(T(\d{2}):(\d{2})(:(\d{2})(\.\d+)?)?(?:([-+])(\d{2}):?(\d{2})|(Z))?)?)?)?\s*\$/"; |
| 1738 |
|
| 1739 |
if ( preg_match( $pat, $date_str, $match ) ) { |
| 1740 |
list( $year, $month, $day, $hours, $minutes, $seconds) = |
| 1741 |
array( $match[1], $match[3], $match[5], $match[7], $match[8], $match[10]); |
| 1742 |
|
| 1743 |
# W3C dates can omit the time, the day of the month, or even the month. |
| 1744 |
# Fill in any blanks using information from the present moment. --CWJ |
| 1745 |
$default['hr'] = (int) gmdate('H'); |
| 1746 |
$default['day'] = (int) gmdate('d'); |
| 1747 |
$default['month'] = (int) gmdate('m'); |
| 1748 |
|
| 1749 |
if (is_null($hours)) : $hours = $default['hr']; $minutes = 0; $seconds = 0; endif; |
| 1750 |
if (is_null($day)) : $day = $default['day']; endif; |
| 1751 |
if (is_null($month)) : $month = $default['month']; endif; |
| 1752 |
|
| 1753 |
# calc epoch for current date assuming GMT |
| 1754 |
$epoch = gmmktime( $hours, $minutes, $seconds, $month, $day, $year); |
| 1755 |
|
| 1756 |
$offset = 0; |
| 1757 |
if ( $match[14] == 'Z' ) { |
| 1758 |
# zulu time, aka GMT |
| 1759 |
} |
| 1760 |
else { |
| 1761 |
list( $tz_mod, $tz_hour, $tz_min ) = |
| 1762 |
array( $match[12], $match[13], $match[14]); |
| 1763 |
|
| 1764 |
# zero out the variables |
| 1765 |
if ( ! $tz_hour ) { $tz_hour = 0; } |
| 1766 |
if ( ! $tz_min ) { $tz_min = 0; } |
| 1767 |
|
| 1768 |
$offset_secs = (($tz_hour*60)+$tz_min)*60; |
| 1769 |
|
| 1770 |
# is timezone ahead of GMT? then subtract offset |
| 1771 |
# |
| 1772 |
if ( $tz_mod == '+' ) { |
| 1773 |
$offset_secs = $offset_secs * -1; |
| 1774 |
} |
| 1775 |
|
| 1776 |
$offset = $offset_secs; |
| 1777 |
} |
| 1778 |
$epoch = $epoch + $offset; |
| 1779 |
return $epoch; |
| 1780 |
} |
| 1781 |
else { |
| 1782 |
return -1; |
| 1783 |
} |
| 1784 |
} |
| 1785 |
|
| 1786 |
# Relative URI static class: PHP class for resolving relative URLs |
| 1787 |
# |
| 1788 |
# This class is derived (under the terms of the GPL) from URL Class 0.3 by |
| 1789 |
# Keyvan Minoukadeh <keyvan@k1m.com>, which is great but more than we need |
| 1790 |
# for MagpieRSS's purposes. The class has been stripped down to a single |
| 1791 |
# public method: Relative_URI::resolve($url, $base), which resolves the URI in |
| 1792 |
# $url relative to the URI in $base |
| 1793 |
# |
| 1794 |
# FeedWordPress also uses this class. So if we have it loaded in, don't load it |
| 1795 |
# again. |
| 1796 |
# |
| 1797 |
# -- Charles Johnson <technophilia@radgeek.com> |
| 1798 |
if (!class_exists('Relative_URI')) { |
| 1799 |
class Relative_URI |
| 1800 |
{ |
| 1801 |
// Resolve relative URI in $url against the base URI in $base. If $base |
| 1802 |
// is not supplied, then we use the REQUEST_URI of this script. |
| 1803 |
// |
| 1804 |
// I'm hoping this method reflects RFC 2396 Section 5.2 |
| 1805 |
function resolve ($url, $base = NULL) |
| 1806 |
{ |
| 1807 |
if (is_null($base)): |
| 1808 |
$base = 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI']; |
| 1809 |
endif; |
| 1810 |
|
| 1811 |
$base = Relative_URI::_encode(trim($base)); |
| 1812 |
$uri_parts = Relative_URI::_parse_url($base); |
| 1813 |
|
| 1814 |
$url = Relative_URI::_encode(trim($url)); |
| 1815 |
$parts = Relative_URI::_parse_url($url); |
| 1816 |
|
| 1817 |
$uri_parts['fragment'] = (isset($parts['fragment']) ? $parts['fragment'] : null); |
| 1818 |
$uri_parts['query'] = (isset($parts['query']) ? $parts['query'] : null); |
| 1819 |
|
| 1820 |
// if path is empty, and scheme, host, and query are undefined, |
| 1821 |
// the URL is referring the base URL |
| 1822 |
|
| 1823 |
if (($parts['path'] == '') && !isset($parts['scheme']) && !isset($parts['host']) && !isset($parts['query'])) { |
| 1824 |
// If the URI is empty or only a fragment, return the base URI |
| 1825 |
return $base . (isset($parts['fragment']) ? '#'.$parts['fragment'] : ''); |
| 1826 |
} elseif (isset($parts['scheme'])) { |
| 1827 |
// If the scheme is set, then the URI is absolute. |
| 1828 |
return $url; |
| 1829 |
} elseif (isset($parts['host'])) { |
| 1830 |
$uri_parts['host'] = $parts['host']; |
| 1831 |
$uri_parts['path'] = $parts['path']; |
| 1832 |
} else { |
| 1833 |
// We have a relative path but not a host. |
| 1834 |
|
| 1835 |
// start ugly fix: |
| 1836 |
// prepend slash to path if base host is set, base path is not set, and url path is not absolute |
| 1837 |
if ($uri_parts['host'] && ($uri_parts['path'] == '') |
| 1838 |
&& (strlen($parts['path']) > 0) |
| 1839 |
&& (substr($parts['path'], 0, 1) != '/')) { |
| 1840 |
$parts['path'] = '/'.$parts['path']; |
| 1841 |
} // end ugly fix |
| 1842 |
|
| 1843 |
if (substr($parts['path'], 0, 1) == '/') { |
| 1844 |
$uri_parts['path'] = $parts['path']; |
| 1845 |
} else { |
| 1846 |
// copy base path excluding any characters after the last (right-most) slash character |
| 1847 |
$buffer = substr($uri_parts['path'], 0, (int)strrpos($uri_parts['path'], '/')+1); |
| 1848 |
// append relative path |
| 1849 |
$buffer .= $parts['path']; |
| 1850 |
// remove "./" where "." is a complete path segment. |
| 1851 |
$buffer = str_replace('/./', '/', $buffer); |
| 1852 |
if (substr($buffer, 0, 2) == './') { |
| 1853 |
$buffer = substr($buffer, 2); |
| 1854 |
} |
| 1855 |
// if buffer ends with "." as a complete path segment, remove it |
| 1856 |
if (substr($buffer, -2) == '/.') { |
| 1857 |
$buffer = substr($buffer, 0, -1); |
| 1858 |
} |
| 1859 |
// remove "<segment>/../" where <segment> is a complete path segment not equal to ".." |
| 1860 |
$search_finished = false; |
| 1861 |
$segment = explode('/', $buffer); |
| 1862 |
while (!$search_finished) { |
| 1863 |
for ($x=0; $x+1 < count($segment);) { |
| 1864 |
if (($segment[$x] != '') && ($segment[$x] != '..') && ($segment[$x+1] == '..')) { |
| 1865 |
if ($x+2 == count($segment)) $segment[] = ''; |
| 1866 |
unset($segment[$x], $segment[$x+1]); |
| 1867 |
$segment = array_values($segment); |
| 1868 |
continue 2; |
| 1869 |
} else { |
| 1870 |
$x++; |
| 1871 |
} |
| 1872 |
} |
| 1873 |
$search_finished = true; |
| 1874 |
} |
| 1875 |
$buffer = (count($segment) == 1) ? '/' : implode('/', $segment); |
| 1876 |
$uri_parts['path'] = $buffer; |
| 1877 |
|
| 1878 |
} |
| 1879 |
} |
| 1880 |
|
| 1881 |
// If we've gotten to this point, we can try to put the pieces |
| 1882 |
// back together. |
| 1883 |
$ret = ''; |
| 1884 |
if (isset($uri_parts['scheme'])) $ret .= $uri_parts['scheme'].':'; |
| 1885 |
if (isset($uri_parts['user'])) { |
| 1886 |
$ret .= $uri_parts['user']; |
| 1887 |
if (isset($uri_parts['pass'])) $ret .= ':'.$uri_parts['parts']; |
| 1888 |
$ret .= '@'; |
| 1889 |
} |
| 1890 |
if (isset($uri_parts['host'])) { |
| 1891 |
$ret .= '//'.$uri_parts['host']; |
| 1892 |
if (isset($uri_parts['port'])) $ret .= ':'.$uri_parts['port']; |
| 1893 |
} |
| 1894 |
$ret .= $uri_parts['path']; |
| 1895 |
if (isset($uri_parts['query'])) $ret .= '?'.$uri_parts['query']; |
| 1896 |
if (isset($uri_parts['fragment'])) $ret .= '#'.$uri_parts['fragment']; |
| 1897 |
|
| 1898 |
return $ret; |
| 1899 |
} |
| 1900 |
|
| 1901 |
/** |
| 1902 |
* Parse URL |
| 1903 |
* |
| 1904 |
* Regular expression grabbed from RFC 2396 Appendix B. |
| 1905 |
* This is a replacement for PHPs builtin parse_url(). |
| 1906 |
* @param string $url |
| 1907 |
* @access private |
| 1908 |
* @return array |
| 1909 |
*/ |
| 1910 |
function _parse_url($url) |
| 1911 |
{ |
| 1912 |
// I'm using this pattern instead of parse_url() as there's a few strings where parse_url() |
| 1913 |
// generates a warning. |
| 1914 |
if (preg_match('!^(([^:/?#]+):)?(//([^/?#]*))?([^?#]*)(\?([^#]*))?(#(.*))?!', $url, $match)) { |
| 1915 |
$parts = array(); |
| 1916 |
if ($match[1] != '') $parts['scheme'] = $match[2]; |
| 1917 |
if ($match[3] != '') $parts['auth'] = $match[4]; |
| 1918 |
// parse auth |
| 1919 |
if (isset($parts['auth'])) { |
| 1920 |
// store user info |
| 1921 |
if (($at_pos = strpos($parts['auth'], '@')) !== false) { |
| 1922 |
$userinfo = explode(':', substr($parts['auth'], 0, $at_pos), 2); |
| 1923 |
$parts['user'] = $userinfo[0]; |
| 1924 |
if (isset($userinfo[1])) $parts['pass'] = $userinfo[1]; |
| 1925 |
$parts['auth'] = substr($parts['auth'], $at_pos+1); |
| 1926 |
} |
| 1927 |
// get port number |
| 1928 |
if ($port_pos = strrpos($parts['auth'], ':')) { |
| 1929 |
$parts['host'] = substr($parts['auth'], 0, $port_pos); |
| 1930 |
$parts['port'] = (int)substr($parts['auth'], $port_pos+1); |
| 1931 |
if ($parts['port'] < 1) $parts['port'] = null; |
| 1932 |
} else { |
| 1933 |
$parts['host'] = $parts['auth']; |
| 1934 |
} |
| 1935 |
} |
| 1936 |
unset($parts['auth']); |
| 1937 |
$parts['path'] = $match[5]; |
| 1938 |
if (isset($match[6]) && ($match[6] != '')) $parts['query'] = $match[7]; |
| 1939 |
if (isset($match[8]) && ($match[8] != '')) $parts['fragment'] = $match[9]; |
| 1940 |
return $parts; |
| 1941 |
} |
| 1942 |
// shouldn't reach here |
| 1943 |
return array('path'=>''); |
| 1944 |
} |
| 1945 |
|
| 1946 |
function _encode($string) |
| 1947 |
{ |
| 1948 |
static $replace = array(); |
| 1949 |
if (!count($replace)) { |
| 1950 |
$find = array(32, 34, 60, 62, 123, 124, 125, 91, 92, 93, 94, 96, 127); |
| 1951 |
$find = array_merge(range(0, 31), $find); |
| 1952 |
$find = array_map('chr', $find); |
| 1953 |
foreach ($find as $char) { |
| 1954 |
$replace[$char] = '%'.bin2hex($char); |
| 1955 |
} |
| 1956 |
} |
| 1957 |
// escape control characters and a few other characters |
| 1958 |
$encoded = strtr($string, $replace); |
| 1959 |
// remove any character outside the hex range: 21 - 7E (see www.asciitable.com) |
| 1960 |
return preg_replace('/[^\x21-\x7e]/', '', $encoded); |
| 1961 |
} |
| 1962 |
} // class Relative_URI |
| 1963 |
} |
| 1964 |
|
| 1965 |
################################################################################ |
| 1966 |
## WordPress: wp_rss(), get_rss() ############################################## |
| 1967 |
################################################################################ |
| 1968 |
|
| 1969 |
function wp_rss ($url, $num) { |
| 1970 |
//ini_set("display_errors", false); uncomment to suppress php errors thrown if the feed is not returned. |
| 1971 |
$num_items = $num; |
| 1972 |
$rss = fetch_rss($url); |
| 1973 |
if ( $rss ) { |
| 1974 |
echo "<ul>"; |
| 1975 |
$rss->items = array_slice($rss->items, 0, $num_items); |
| 1976 |
foreach ($rss->items as $item ) { |
| 1977 |
echo "<li>\n"; |
| 1978 |
echo "<a href='$item[link]' title='$item[description]'>"; |
| 1979 |
echo htmlentities($item['title']); |
| 1980 |
echo "</a><br />\n"; |
| 1981 |
echo "</li>\n"; |
| 1982 |
} |
| 1983 |
echo "</ul>"; |
| 1984 |
} |
| 1985 |
else { |
| 1986 |
echo "an error has occured the feed is probably down, try again later."; |
| 1987 |
} |
| 1988 |
} |
| 1989 |
|
| 1990 |
function get_rss ($uri, $num = 5) { // Like get posts, but for RSS |
| 1991 |
$rss = fetch_rss($url); |
| 1992 |
if ( $rss ) { |
| 1993 |
$rss->items = array_slice($rss->items, 0, $num_items); |
| 1994 |
foreach ($rss->items as $item ) { |
| 1995 |
echo "<li>\n"; |
| 1996 |
echo "<a href='$item[link]' title='$item[description]'>"; |
| 1997 |
echo htmlentities($item['title']); |
| 1998 |
echo "</a><br />\n"; |
| 1999 |
echo "</li>\n"; |
| 2000 |
} |
| 2001 |
return $posts; |
| 2002 |
} else { |
| 2003 |
return false; |
| 2004 |
} |
| 2005 |
} |
| 2006 |
?> |
