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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: 0.7wp |
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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 a modification of 0.7. In addition to improved handling of character |
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* encoding and other updates, this branch of MagpieRSS 0.7 also supports |
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* multiple categorization of posts (using <dc:subject> or <category>). The |
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* file is, therefore, derived from four sources: (1) Kellan's MagpieRSS 0.51, |
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* (2) the WordPress development team's modifications to MagpieRSS 0.51, |
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* (3) Kellan's MagpieRSS 0.7, and (4) Charles Johnson's modifications to |
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* MagpieRSS 0.7. All possible because of the GPL. Yay 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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* 5. New cases added to MagpieRSS::feed_start_element(), |
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* MagpieRSS::feed_end_element(), and MagpieRSS::normalize() to handle |
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* multiple categories correctly. |
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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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define('MAGPIE_USER_AGENT', 'WordPress/' . $wp_version); |
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|
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# UPDATED: rss_parse.inc: class MagpieRSS, function map_attrs |
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# --- cut here --- |
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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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|
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var $_CONTENT_CONSTRUCTS = array('content', 'summary', 'info', 'title', 'tagline', 'copyright'); |
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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(); // parser stack |
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var $inchannel = false; |
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var $initem = false; |
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var $incontent = false; // if in Atom <content mode="xml"> field |
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var $intextinput = false; |
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var $inimage = false; |
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var $current_namespace = false; |
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|
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var $incategory = false; |
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var $current_category = 0; |
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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, $detect_encoding=true) |
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{ |
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# if PHP xml isn't compiled in, die |
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# |
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if (!function_exists('xml_parser_create')) { |
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$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( $this->parser, 'feed_cdata' ); |
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|
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$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, $element, &$attrs) { |
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$el = $element = strtolower($element); |
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$attrs = array_change_key_case($attrs, CASE_LOWER); |
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|
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// check for a namespace, and split if found |
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$ns = false; |
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if ( strpos( $element, ':' ) ) { |
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list($ns, $el) = split( ':', $element, 2); |
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} |
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if ( $ns and $ns != 'rdf' ) { |
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$this->current_namespace = $ns; |
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} |
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|
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# if feed type isn't set, then this is first element of feed |
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# identify feed from root element |
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# |
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if (!isset($this->feed_type) ) { |
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if ( $el == 'rdf' ) { |
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$this->feed_type = RSS; |
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$this->feed_version = '1.0'; |
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} |
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elseif ( $el == 'rss' ) { |
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$this->feed_type = RSS; |
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$this->feed_version = $attrs['version']; |
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} |
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elseif ( $el == 'feed' ) { |
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$this->feed_type = ATOM; |
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$this->feed_version = $attrs['version']; |
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$this->inchannel = true; |
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} |
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return; |
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} |
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|
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if ( $el == 'channel' ) |
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{ |
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$this->inchannel = true; |
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} |
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elseif ($el == 'item' or $el == 'entry' ) |
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{ |
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$this->initem = true; |
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if ( isset($attrs['rdf:about']) ) { |
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$this->current_item['about'] = $attrs['rdf:about']; |
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} |
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} |
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|
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elseif ($this->initem and ($el == 'category' or ($this->current_namespace == 'dc' and $el == 'subject'))) { |
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$this->incategory = true; |
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array_unshift( $this->stack, $el ); |
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} |
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|
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// if we're in the default namespace of an RSS feed, |
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// record textinput or image fields |
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elseif ( |
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$this->feed_type == RSS and |
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$this->current_namespace == '' and |
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$el == 'textinput' ) |
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{ |
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$this->intextinput = true; |
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} |
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|
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elseif ( |
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$this->feed_type == RSS and |
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$this->current_namespace == '' and |
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$el == 'image' ) |
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{ |
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$this->inimage = true; |
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} |
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|
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# handle atom content constructs |
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elseif ( $this->feed_type == ATOM and in_array($el, $this->_CONTENT_CONSTRUCTS) ) |
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{ |
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// avoid clashing w/ RSS mod_content |
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if ($el == 'content' ) { |
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$el = 'atom_content'; |
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} |
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|
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$this->incontent = $el; |
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|
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|
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} |
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|
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// if inside an Atom content construct (e.g. content or summary) field treat tags as text |
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elseif ($this->feed_type == ATOM and $this->incontent ) |
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{ |
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// if tags are inlined, then flatten |
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$attrs_str = join(' ', |
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array_map('map_attrs', |
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array_keys($attrs), |
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array_values($attrs) ) ); |
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|
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$this->append_content( "<$element $attrs_str>" ); |
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|
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array_unshift( $this->stack, $el ); |
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} |
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|
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// Atom support many links per containging element. |
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// Magpie treats link elements of type rel='alternate' |
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// as being equivalent to RSS's simple link element. |
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// |
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elseif ($this->feed_type == ATOM and $el == 'link' ) |
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{ |
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if ( isset($attrs['rel']) and $attrs['rel'] == 'alternate' ) |
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{ |
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$link_el = 'link'; |
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} |
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else { |
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$link_el = 'link_' . $attrs['rel']; |
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} |
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|
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$this->append($link_el, $attrs['href']); |
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} |
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|
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// set stack[0] to current element |
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else { |
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array_unshift($this->stack, $el); |
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} |
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} |
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|
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|
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|
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function feed_cdata ($p, $text) { |
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if ($this->feed_type == ATOM and $this->incontent) |
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{ |
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$this->append_content( $text ); |
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} |
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else { |
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$current_el = join('_', array_reverse($this->stack)); |
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$this->append($current_el, $text); |
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} |
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} |
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|
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function feed_end_element ($p, $el) { |
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$el = strtolower($el); |
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|
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if ( $el == 'item' or $el == 'entry' ) |
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{ |
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$this->items[] = $this->current_item; |
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$this->current_item = array(); |
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$this->initem = false; |
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|
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$this->current_category = 0; |
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} |
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elseif ($this->initem and ($el == 'category' or $el == 'dc:subject')) { |
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$this->incategory = false; |
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$this->current_category = $this->current_category + 1; |
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array_shift( $this->stack ); |
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} |
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elseif ($this->feed_type == RSS and $this->current_namespace == '' and $el == 'textinput' ) |
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{ |
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$this->intextinput = false; |
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} |
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elseif ($this->feed_type == RSS and $this->current_namespace == '' and $el == 'image' ) |
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{ |
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$this->inimage = false; |
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} |
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elseif ($this->feed_type == ATOM and in_array($el, $this->_CONTENT_CONSTRUCTS) ) |
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{ |
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$this->incontent = false; |
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} |
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elseif ($el == 'channel' or $el == 'feed' ) |
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{ |
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$this->inchannel = false; |
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} |
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elseif ($this->feed_type == ATOM and $this->incontent ) { |
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// balance tags properly |
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// note: i don't think this is actually neccessary |
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if ( $this->stack[0] == $el ) |
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{ |
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$this->append_content("</$el>"); |
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} |
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else { |
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$this->append_content("<$el />"); |
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} |
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|
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array_shift( $this->stack ); |
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} |
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else { |
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array_shift( $this->stack ); |
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} |
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|
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$this->current_namespace = false; |
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} |
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|
| 350 |
function concat (&$str1, $str2="") { |
| 351 |
if (!isset($str1) ) { |
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$str1=""; |
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} |
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$str1 .= $str2; |
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} |
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|
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|
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|
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function append_content($text) { |
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if ( $this->initem ) { |
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$this->concat( $this->current_item[ $this->incontent ], $text ); |
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} |
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elseif ( $this->inchannel ) { |
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$this->concat( $this->channel[ $this->incontent ], $text ); |
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} |
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} |
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|
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// smart append - field and namespace aware |
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function append($el, $text) { |
| 370 |
if (!$el) { |
| 371 |
return; |
| 372 |
} |
| 373 |
if ( $this->current_namespace ) |
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{ |
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if ( $this->incategory ) { |
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$this->concat( $this->current_item['categories'][$this->current_category], $text ); |
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} |
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elseif ( $this->initem ) { |
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$this->concat( |
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$this->current_item[ $this->current_namespace ][ $el ], $text ); |
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} |
| 382 |
elseif ($this->inchannel) { |
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$this->concat( |
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$this->channel[ $this->current_namespace][ $el ], $text ); |
| 385 |
} |
| 386 |
elseif ($this->intextinput) { |
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$this->concat( |
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$this->textinput[ $this->current_namespace][ $el ], $text ); |
| 389 |
} |
| 390 |
elseif ($this->inimage) { |
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$this->concat( |
| 392 |
$this->image[ $this->current_namespace ][ $el ], $text ); |
| 393 |
} |
| 394 |
} |
| 395 |
else { |
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if ( $this->incategory ) { |
| 397 |
$this->concat( $this->current_item['categories'][$this->current_category], $text ); |
| 398 |
} |
| 399 |
elseif ( $this->initem ) { |
| 400 |
$this->concat( |
| 401 |
$this->current_item[ $el ], $text); |
| 402 |
} |
| 403 |
elseif ($this->intextinput) { |
| 404 |
$this->concat( |
| 405 |
$this->textinput[ $el ], $text ); |
| 406 |
} |
| 407 |
elseif ($this->inimage) { |
| 408 |
$this->concat( |
| 409 |
$this->image[ $el ], $text ); |
| 410 |
} |
| 411 |
elseif ($this->inchannel) { |
| 412 |
$this->concat( |
| 413 |
$this->channel[ $el ], $text ); |
| 414 |
} |
| 415 |
|
| 416 |
} |
| 417 |
} |
| 418 |
|
| 419 |
function normalize () { |
| 420 |
// if atom populate rss fields |
| 421 |
if ( $this->is_atom() ) { |
| 422 |
$this->channel['description'] = $this->channel['tagline']; |
| 423 |
for ( $i = 0; $i < count($this->items); $i++) { |
| 424 |
$item = $this->items[$i]; |
| 425 |
if ( isset($item['summary']) ) |
| 426 |
$item['description'] = $item['summary']; |
| 427 |
if ( isset($item['atom_content'])) |
| 428 |
$item['content']['encoded'] = $item['atom_content']; |
| 429 |
|
| 430 |
$atom_date = (isset($item['issued']) ) ? $item['issued'] : $item['modified']; |
| 431 |
if ( $atom_date ) { |
| 432 |
$epoch = @parse_w3cdtf($item['modified']); |
| 433 |
if ($epoch and $epoch > 0) { |
| 434 |
$item['date_timestamp'] = $epoch; |
| 435 |
} |
| 436 |
} |
| 437 |
|
| 438 |
if ( is_array($item['categories']) ) { |
| 439 |
$item['category'] = $item['categories'][0]; |
| 440 |
$item['dc']['subjects'] = $item['categories']; |
| 441 |
$item['dc']['subject'] = $item['category']; |
| 442 |
} |
| 443 |
|
| 444 |
$this->items[$i] = $item; |
| 445 |
} |
| 446 |
} |
| 447 |
elseif ( $this->is_rss() ) { |
| 448 |
$this->channel['tagline'] = $this->channel['description']; |
| 449 |
for ( $i = 0; $i < count($this->items); $i++) { |
| 450 |
$item = $this->items[$i]; |
| 451 |
if ( isset($item['description'])) |
| 452 |
$item['summary'] = $item['description']; |
| 453 |
if ( isset($item['content']['encoded'] ) ) |
| 454 |
$item['atom_content'] = $item['content']['encoded']; |
| 455 |
|
| 456 |
if ( $this->is_rss() == '1.0' and isset($item['dc']['date']) ) { |
| 457 |
$epoch = @parse_w3cdtf($item['dc']['date']); |
| 458 |
if ($epoch and $epoch > 0) { |
| 459 |
$item['date_timestamp'] = $epoch; |
| 460 |
} |
| 461 |
} |
| 462 |
elseif ( isset($item['pubdate']) ) { |
| 463 |
$epoch = @strtotime($item['pubdate']); |
| 464 |
if ($epoch > 0) { |
| 465 |
$item['date_timestamp'] = $epoch; |
| 466 |
} |
| 467 |
} |
| 468 |
|
| 469 |
if ( is_array($item['categories']) ) { |
| 470 |
$item['category'] = $item['categories'][0]; |
| 471 |
$item['dc']['subjects'] = $item['categories']; |
| 472 |
$item['dc']['subject'] = $item['category']; |
| 473 |
} |
| 474 |
|
| 475 |
$this->items[$i] = $item; |
| 476 |
} |
| 477 |
} |
| 478 |
} |
| 479 |
|
| 480 |
|
| 481 |
function is_rss () { |
| 482 |
if ( $this->feed_type == RSS ) { |
| 483 |
return $this->feed_version; |
| 484 |
} |
| 485 |
else { |
| 486 |
return false; |
| 487 |
} |
| 488 |
} |
| 489 |
|
| 490 |
function is_atom() { |
| 491 |
if ( $this->feed_type == ATOM ) { |
| 492 |
return $this->feed_version; |
| 493 |
} |
| 494 |
else { |
| 495 |
return false; |
| 496 |
} |
| 497 |
} |
| 498 |
|
| 499 |
/** |
| 500 |
* return XML parser, and possibly re-encoded source |
| 501 |
* |
| 502 |
*/ |
| 503 |
function create_parser($source, $out_enc, $in_enc, $detect) { |
| 504 |
if ( substr(phpversion(),0,1) == 5) { |
| 505 |
$parser = $this->php5_create_parser($in_enc, $detect); |
| 506 |
} |
| 507 |
else { |
| 508 |
list($parser, $source) = $this->php4_create_parser($source, $in_enc, $detect); |
| 509 |
} |
| 510 |
if ($out_enc) { |
| 511 |
$this->encoding = $out_enc; |
| 512 |
xml_parser_set_option($parser, XML_OPTION_TARGET_ENCODING, $out_enc); |
| 513 |
} |
| 514 |
|
| 515 |
return array($parser, $source); |
| 516 |
} |
| 517 |
|
| 518 |
/** |
| 519 |
* Instantiate an XML parser under PHP5 |
| 520 |
* |
| 521 |
* PHP5 will do a fine job of detecting input encoding |
| 522 |
* if passed an empty string as the encoding. |
| 523 |
* |
| 524 |
* All hail libxml2! |
| 525 |
* |
| 526 |
*/ |
| 527 |
function php5_create_parser($in_enc, $detect) { |
| 528 |
// by default php5 does a fine job of detecting input encodings |
| 529 |
if(!$detect && $in_enc) { |
| 530 |
return xml_parser_create($in_enc); |
| 531 |
} |
| 532 |
else { |
| 533 |
return xml_parser_create(''); |
| 534 |
} |
| 535 |
} |
| 536 |
|
| 537 |
/** |
| 538 |
* Instaniate an XML parser under PHP4 |
| 539 |
* |
| 540 |
* Unfortunately PHP4's support for character encodings |
| 541 |
* and especially XML and character encodings sucks. As |
| 542 |
* long as the documents you parse only contain characters |
| 543 |
* from the ISO-8859-1 character set (a superset of ASCII, |
| 544 |
* and a subset of UTF-8) you're fine. However once you |
| 545 |
* step out of that comfy little world things get mad, bad, |
| 546 |
* and dangerous to know. |
| 547 |
* |
| 548 |
* The following code is based on SJM's work with FoF |
| 549 |
* @see http://minutillo.com/steve/weblog/2004/6/17/php-xml-and-character-encodings-a-tale-of-sadness-rage-and-data-loss |
| 550 |
* |
| 551 |
*/ |
| 552 |
function php4_create_parser($source, $in_enc, $detect) { |
| 553 |
if ( !$detect ) { |
| 554 |
return array(xml_parser_create($in_enc), $source); |
| 555 |
} |
| 556 |
|
| 557 |
if (!$in_enc) { |
| 558 |
if (preg_match('/<?xml.*encoding=[\'"](.*?)[\'"].*?>/m', $source, $m)) { |
| 559 |
$in_enc = strtoupper($m[1]); |
| 560 |
$this->source_encoding = $in_enc; |
| 561 |
} |
| 562 |
else { |
| 563 |
$in_enc = 'UTF-8'; |
| 564 |
} |
| 565 |
} |
| 566 |
|
| 567 |
if ($this->known_encoding($in_enc)) { |
| 568 |
return array(xml_parser_create($in_enc), $source); |
| 569 |
} |
| 570 |
|
| 571 |
// the dectected encoding is not one of the simple encodings PHP knows |
| 572 |
|
| 573 |
// attempt to use the iconv extension to |
| 574 |
// cast the XML to a known encoding |
| 575 |
// @see http://php.net/iconv |
| 576 |
|
| 577 |
if (function_exists('iconv')) { |
| 578 |
$encoded_source = iconv($in_enc,'UTF-8', $source); |
| 579 |
if ($encoded_source) { |
| 580 |
return array(xml_parser_create('UTF-8'), $encoded_source); |
| 581 |
} |
| 582 |
} |
| 583 |
|
| 584 |
// iconv didn't work, try mb_convert_encoding |
| 585 |
// @see http://php.net/mbstring |
| 586 |
if(function_exists('mb_convert_encoding')) { |
| 587 |
$encoded_source = mb_convert_encoding($source, 'UTF-8', $in_enc ); |
| 588 |
if ($encoded_source) { |
| 589 |
return array(xml_parser_create('UTF-8'), $encoded_source); |
| 590 |
} |
| 591 |
} |
| 592 |
|
| 593 |
// else |
| 594 |
$this->error("Feed is in an unsupported character encoding. ($in_enc) " . |
| 595 |
"You may see strange artifacts, and mangled characters.", |
| 596 |
E_USER_NOTICE); |
| 597 |
|
| 598 |
return array(xml_parser_create(), $source); |
| 599 |
} |
| 600 |
|
| 601 |
function known_encoding($enc) { |
| 602 |
$enc = strtoupper($enc); |
| 603 |
if ( in_array($enc, $this->_KNOWN_ENCODINGS) ) { |
| 604 |
return $enc; |
| 605 |
} |
| 606 |
else { |
| 607 |
return false; |
| 608 |
} |
| 609 |
} |
| 610 |
|
| 611 |
function error ($errormsg, $lvl=E_USER_WARNING) { |
| 612 |
// append PHP's error message if track_errors enabled |
| 613 |
if ( $php_errormsg ) { |
| 614 |
$errormsg .= " ($php_errormsg)"; |
| 615 |
} |
| 616 |
if ( MAGPIE_DEBUG ) { |
| 617 |
trigger_error( $errormsg, $lvl); |
| 618 |
} |
| 619 |
else { |
| 620 |
error_log( $errormsg, 0); |
| 621 |
} |
| 622 |
|
| 623 |
$notices = E_USER_NOTICE|E_NOTICE; |
| 624 |
if ( $lvl&$notices ) { |
| 625 |
$this->WARNING = $errormsg; |
| 626 |
} else { |
| 627 |
$this->ERROR = $errormsg; |
| 628 |
} |
| 629 |
} |
| 630 |
} // end class RSS |
| 631 |
|
| 632 |
function map_attrs($k, $v) { |
| 633 |
return "$k=\"$v\""; |
| 634 |
} |
| 635 |
# ---- cut here ---- |
| 636 |
|
| 637 |
require_once( dirname(__FILE__) . '/class-snoopy.php'); |
| 638 |
|
| 639 |
# -- UPDATED from rss_fetch.inc: fetch_rss, error, debug, magpie_error |
| 640 |
# --- cut here --- |
| 641 |
function fetch_rss ($url) { |
| 642 |
// initialize constants |
| 643 |
init(); |
| 644 |
|
| 645 |
if ( !isset($url) ) { |
| 646 |
error("fetch_rss called without a url"); |
| 647 |
return false; |
| 648 |
} |
| 649 |
|
| 650 |
// if cache is disabled |
| 651 |
if ( !MAGPIE_CACHE_ON ) { |
| 652 |
// fetch file, and parse it |
| 653 |
$resp = _fetch_remote_file( $url ); |
| 654 |
if ( is_success( $resp->status ) ) { |
| 655 |
return _response_to_rss( $resp ); |
| 656 |
} |
| 657 |
else { |
| 658 |
error("Failed to fetch $url and cache is off"); |
| 659 |
return false; |
| 660 |
} |
| 661 |
} |
| 662 |
// else cache is ON |
| 663 |
else { |
| 664 |
// Flow |
| 665 |
// 1. check cache |
| 666 |
// 2. if there is a hit, make sure its fresh |
| 667 |
// 3. if cached obj fails freshness check, fetch remote |
| 668 |
// 4. if remote fails, return stale object, or error |
| 669 |
|
| 670 |
$cache = new RSSCache( MAGPIE_CACHE_DIR, MAGPIE_CACHE_AGE ); |
| 671 |
|
| 672 |
if (MAGPIE_DEBUG and $cache->ERROR) { |
| 673 |
debug($cache->ERROR, E_USER_WARNING); |
| 674 |
} |
| 675 |
|
| 676 |
|
| 677 |
$cache_status = 0; // response of check_cache |
| 678 |
$request_headers = array(); // HTTP headers to send with fetch |
| 679 |
$rss = 0; // parsed RSS object |
| 680 |
$errormsg = 0; // errors, if any |
| 681 |
|
| 682 |
// store parsed XML by desired output encoding |
| 683 |
// as character munging happens at parse time |
| 684 |
$cache_key = $url . MAGPIE_OUTPUT_ENCODING; |
| 685 |
|
| 686 |
if (!$cache->ERROR) { |
| 687 |
// return cache HIT, MISS, or STALE |
| 688 |
$cache_status = $cache->check_cache( $cache_key); |
| 689 |
} |
| 690 |
|
| 691 |
// if object cached, and cache is fresh, return cached obj |
| 692 |
if ( $cache_status == 'HIT' ) { |
| 693 |
$rss = $cache->get( $cache_key ); |
| 694 |
if ( isset($rss) and $rss ) { |
| 695 |
// should be cache age |
| 696 |
$rss->from_cache = 1; |
| 697 |
if ( MAGPIE_DEBUG > 1) { |
| 698 |
debug("MagpieRSS: Cache HIT", E_USER_NOTICE); |
| 699 |
} |
| 700 |
return $rss; |
| 701 |
} |
| 702 |
} |
| 703 |
|
| 704 |
// else attempt a conditional get |
| 705 |
|
| 706 |
// setup headers |
| 707 |
if ( $cache_status == 'STALE' ) { |
| 708 |
$rss = $cache->get( $cache_key ); |
| 709 |
if ( $rss and $rss->etag and $rss->last_modified ) { |
| 710 |
$request_headers['If-None-Match'] = $rss->etag; |
| 711 |
$request_headers['If-Last-Modified'] = $rss->last_modified; |
| 712 |
} |
| 713 |
} |
| 714 |
|
| 715 |
$resp = _fetch_remote_file( $url, $request_headers ); |
| 716 |
|
| 717 |
if (isset($resp) and $resp) { |
| 718 |
if ($resp->status == '304' ) { |
| 719 |
// we have the most current copy |
| 720 |
if ( MAGPIE_DEBUG > 1) { |
| 721 |
debug("Got 304 for $url"); |
| 722 |
} |
| 723 |
// reset cache on 304 (at minutillo insistent prodding) |
| 724 |
$cache->set($cache_key, $rss); |
| 725 |
return $rss; |
| 726 |
} |
| 727 |
elseif ( is_success( $resp->status ) ) { |
| 728 |
$rss = _response_to_rss( $resp ); |
| 729 |
if ( $rss ) { |
| 730 |
if (MAGPIE_DEBUG > 1) { |
| 731 |
debug("Fetch successful"); |
| 732 |
} |
| 733 |
// add object to cache |
| 734 |
$cache->set( $cache_key, $rss ); |
| 735 |
return $rss; |
| 736 |
} |
| 737 |
} |
| 738 |
else { |
| 739 |
$errormsg = "Failed to fetch $url "; |
| 740 |
if ( $resp->status == '-100' ) { |
| 741 |
$errormsg .= "(Request timed out after " . MAGPIE_FETCH_TIME_OUT . " seconds)"; |
| 742 |
} |
| 743 |
elseif ( $resp->error ) { |
| 744 |
# compensate for Snoopy's annoying habbit to tacking |
| 745 |
# on '\n' |
| 746 |
$http_error = substr($resp->error, 0, -2); |
| 747 |
$errormsg .= "(HTTP Error: $http_error)"; |
| 748 |
} |
| 749 |
else { |
| 750 |
$errormsg .= "(HTTP Response: " . $resp->response_code .')'; |
| 751 |
} |
| 752 |
} |
| 753 |
} |
| 754 |
else { |
| 755 |
$errormsg = "Unable to retrieve RSS file for unknown reasons."; |
| 756 |
} |
| 757 |
|
| 758 |
// else fetch failed |
| 759 |
|
| 760 |
// attempt to return cached object |
| 761 |
if ($rss) { |
| 762 |
if ( MAGPIE_DEBUG ) { |
| 763 |
debug("Returning STALE object for $url"); |
| 764 |
} |
| 765 |
return $rss; |
| 766 |
} |
| 767 |
|
| 768 |
// else we totally failed |
| 769 |
error( $errormsg ); |
| 770 |
|
| 771 |
return false; |
| 772 |
|
| 773 |
} // end if ( !MAGPIE_CACHE_ON ) { |
| 774 |
} // end fetch_rss() |
| 775 |
|
| 776 |
/*=======================================================================*\ |
| 777 |
Function: error |
| 778 |
Purpose: set MAGPIE_ERROR, and trigger error |
| 779 |
\*=======================================================================*/ |
| 780 |
|
| 781 |
function error ($errormsg, $lvl=E_USER_WARNING) { |
| 782 |
global $MAGPIE_ERROR; |
| 783 |
|
| 784 |
// append PHP's error message if track_errors enabled |
| 785 |
if ( isset($php_errormsg) ) { |
| 786 |
$errormsg .= " ($php_errormsg)"; |
| 787 |
} |
| 788 |
if ( $errormsg ) { |
| 789 |
$errormsg = "MagpieRSS: $errormsg"; |
| 790 |
$MAGPIE_ERROR = $errormsg; |
| 791 |
trigger_error( $errormsg, $lvl); |
| 792 |
} |
| 793 |
} |
| 794 |
|
| 795 |
function debug ($debugmsg, $lvl=E_USER_NOTICE) { |
| 796 |
trigger_error("MagpieRSS [debug] $debugmsg", $lvl); |
| 797 |
} |
| 798 |
|
| 799 |
/*=======================================================================*\ |
| 800 |
Function: magpie_error |
| 801 |
Purpose: accessor for the magpie error variable |
| 802 |
\*=======================================================================*/ |
| 803 |
function magpie_error ($errormsg="") { |
| 804 |
global $MAGPIE_ERROR; |
| 805 |
|
| 806 |
if ( isset($errormsg) and $errormsg ) { |
| 807 |
$MAGPIE_ERROR = $errormsg; |
| 808 |
} |
| 809 |
|
| 810 |
return $MAGPIE_ERROR; |
| 811 |
} |
| 812 |
# --- cut here --- |
| 813 |
|
| 814 |
# UPDATED FROM: rss_fetch.inc: _fetch_remote_file, _response_to_rss, init |
| 815 |
# --- cut here --- |
| 816 |
/*=======================================================================*\ |
| 817 |
Function: _fetch_remote_file |
| 818 |
Purpose: retrieve an arbitrary remote file |
| 819 |
Input: url of the remote file |
| 820 |
headers to send along with the request (optional) |
| 821 |
Output: an HTTP response object (see Snoopy.class.inc) |
| 822 |
\*=======================================================================*/ |
| 823 |
function _fetch_remote_file ($url, $headers = "" ) { |
| 824 |
// Snoopy is an HTTP client in PHP |
| 825 |
$client = new Snoopy(); |
| 826 |
$client->agent = MAGPIE_USER_AGENT; |
| 827 |
$client->read_timeout = MAGPIE_FETCH_TIME_OUT; |
| 828 |
$client->use_gzip = MAGPIE_USE_GZIP; |
| 829 |
if (is_array($headers) ) { |
| 830 |
$client->rawheaders = $headers; |
| 831 |
} |
| 832 |
|
| 833 |
@$client->fetch($url); |
| 834 |
return $client; |
| 835 |
|
| 836 |
} |
| 837 |
|
| 838 |
/*=======================================================================*\ |
| 839 |
Function: _response_to_rss |
| 840 |
Purpose: parse an HTTP response object into an RSS object |
| 841 |
Input: an HTTP response object (see Snoopy) |
| 842 |
Output: parsed RSS object (see rss_parse) |
| 843 |
\*=======================================================================*/ |
| 844 |
function _response_to_rss ($resp) { |
| 845 |
$rss = new MagpieRSS( $resp->results, MAGPIE_OUTPUT_ENCODING, MAGPIE_INPUT_ENCODING, MAGPIE_DETECT_ENCODING ); |
| 846 |
|
| 847 |
// if RSS parsed successfully |
| 848 |
if ( $rss and !$rss->ERROR) { |
| 849 |
|
| 850 |
// find Etag, and Last-Modified |
| 851 |
foreach($resp->headers as $h) { |
| 852 |
// 2003-03-02 - Nicola Asuni (www.tecnick.com) - fixed bug "Undefined offset: 1" |
| 853 |
if (strpos($h, ": ")) { |
| 854 |
list($field, $val) = explode(": ", $h, 2); |
| 855 |
} |
| 856 |
else { |
| 857 |
$field = $h; |
| 858 |
$val = ""; |
| 859 |
} |
| 860 |
|
| 861 |
if ( $field == 'ETag' ) { |
| 862 |
$rss->etag = $val; |
| 863 |
} |
| 864 |
|
| 865 |
if ( $field == 'Last-Modified' ) { |
| 866 |
$rss->last_modified = $val; |
| 867 |
} |
| 868 |
} |
| 869 |
|
| 870 |
return $rss; |
| 871 |
} // else construct error message |
| 872 |
else { |
| 873 |
$errormsg = "Failed to parse RSS file."; |
| 874 |
|
| 875 |
if ($rss) { |
| 876 |
$errormsg .= " (" . $rss->ERROR . ")"; |
| 877 |
} |
| 878 |
error($errormsg); |
| 879 |
|
| 880 |
return false; |
| 881 |
} // end if ($rss and !$rss->error) |
| 882 |
} |
| 883 |
|
| 884 |
/*=======================================================================*\ |
| 885 |
Function: init |
| 886 |
Purpose: setup constants with default values |
| 887 |
check for user overrides |
| 888 |
\*=======================================================================*/ |
| 889 |
function init () { |
| 890 |
if ( defined('MAGPIE_INITALIZED') ) { |
| 891 |
return; |
| 892 |
} |
| 893 |
else { |
| 894 |
define('MAGPIE_INITALIZED', true); |
| 895 |
} |
| 896 |
|
| 897 |
if ( !defined('MAGPIE_CACHE_ON') ) { |
| 898 |
define('MAGPIE_CACHE_ON', true); |
| 899 |
} |
| 900 |
|
| 901 |
if ( !defined('MAGPIE_CACHE_DIR') ) { |
| 902 |
define('MAGPIE_CACHE_DIR', './cache'); |
| 903 |
} |
| 904 |
|
| 905 |
if ( !defined('MAGPIE_CACHE_AGE') ) { |
| 906 |
define('MAGPIE_CACHE_AGE', 60*60); // one hour |
| 907 |
} |
| 908 |
|
| 909 |
if ( !defined('MAGPIE_CACHE_FRESH_ONLY') ) { |
| 910 |
define('MAGPIE_CACHE_FRESH_ONLY', false); |
| 911 |
} |
| 912 |
|
| 913 |
if ( !defined('MAGPIE_OUTPUT_ENCODING') ) { |
| 914 |
define('MAGPIE_OUTPUT_ENCODING', 'ISO-8859-1'); |
| 915 |
} |
| 916 |
|
| 917 |
if ( !defined('MAGPIE_INPUT_ENCODING') ) { |
| 918 |
define('MAGPIE_INPUT_ENCODING', null); |
| 919 |
} |
| 920 |
|
| 921 |
if ( !defined('MAGPIE_DETECT_ENCODING') ) { |
| 922 |
define('MAGPIE_DETECT_ENCODING', true); |
| 923 |
} |
| 924 |
|
| 925 |
if ( !defined('MAGPIE_DEBUG') ) { |
| 926 |
define('MAGPIE_DEBUG', 0); |
| 927 |
} |
| 928 |
|
| 929 |
if ( !defined('MAGPIE_USER_AGENT') ) { |
| 930 |
# WORDPRESS MODIFICATION: send WordPress as user-agent |
| 931 |
# --- cut here --- |
| 932 |
$ua = 'WordPress/'. $wp_version . ' (+http://www.wordpress.org'; |
| 933 |
# --- cut here --- |
| 934 |
|
| 935 |
if ( MAGPIE_CACHE_ON ) { |
| 936 |
$ua = $ua . ')'; |
| 937 |
} |
| 938 |
else { |
| 939 |
$ua = $ua . '; No cache)'; |
| 940 |
} |
| 941 |
|
| 942 |
define('MAGPIE_USER_AGENT', $ua); |
| 943 |
} |
| 944 |
|
| 945 |
if ( !defined('MAGPIE_FETCH_TIME_OUT') ) { |
| 946 |
define('MAGPIE_FETCH_TIME_OUT', 5); // 5 second timeout |
| 947 |
} |
| 948 |
|
| 949 |
// use gzip encoding to fetch rss files if supported? |
| 950 |
if ( !defined('MAGPIE_USE_GZIP') ) { |
| 951 |
define('MAGPIE_USE_GZIP', true); |
| 952 |
} |
| 953 |
} |
| 954 |
# --- cut here --- |
| 955 |
|
| 956 |
function is_info ($sc) { |
| 957 |
return $sc >= 100 && $sc < 200; |
| 958 |
} |
| 959 |
|
| 960 |
function is_success ($sc) { |
| 961 |
return $sc >= 200 && $sc < 300; |
| 962 |
} |
| 963 |
|
| 964 |
function is_redirect ($sc) { |
| 965 |
return $sc >= 300 && $sc < 400; |
| 966 |
} |
| 967 |
|
| 968 |
function is_error ($sc) { |
| 969 |
return $sc >= 400 && $sc < 600; |
| 970 |
} |
| 971 |
|
| 972 |
function is_client_error ($sc) { |
| 973 |
return $sc >= 400 && $sc < 500; |
| 974 |
} |
| 975 |
|
| 976 |
function is_server_error ($sc) { |
| 977 |
return $sc >= 500 && $sc < 600; |
| 978 |
} |
| 979 |
|
| 980 |
# WORDPRESS-SPECIFIC: class RSSCache (modified to use WP database) |
| 981 |
# --- cut here --- |
| 982 |
class RSSCache { |
| 983 |
var $BASE_CACHE = 'wp-content/cache'; // where the cache files are stored |
| 984 |
var $MAX_AGE = 43200; // when are files stale, default twelve hours |
| 985 |
var $ERROR = ''; // accumulate error messages |
| 986 |
|
| 987 |
function RSSCache ($base='', $age='') { |
| 988 |
if ( $base ) { |
| 989 |
$this->BASE_CACHE = $base; |
| 990 |
} |
| 991 |
if ( $age ) { |
| 992 |
$this->MAX_AGE = $age; |
| 993 |
} |
| 994 |
|
| 995 |
} |
| 996 |
|
| 997 |
/*=======================================================================*\ |
| 998 |
Function: set |
| 999 |
Purpose: add an item to the cache, keyed on url |
| 1000 |
Input: url from wich the rss file was fetched |
| 1001 |
Output: true on sucess |
| 1002 |
\*=======================================================================*/ |
| 1003 |
function set ($url, $rss) { |
| 1004 |
global $wpdb; |
| 1005 |
$cache_option = 'rss_' . $this->file_name( $url ); |
| 1006 |
$cache_timestamp = 'rss_' . $this->file_name( $url ) . '_ts'; |
| 1007 |
|
| 1008 |
if ( !$wpdb->get_var("SELECT option_name FROM $wpdb->options WHERE option_name = '$cache_option'") ) |
| 1009 |
add_option($cache_option, '', '', 'no'); |
| 1010 |
if ( !$wpdb->get_var("SELECT option_name FROM $wpdb->options WHERE option_name = '$cache_timestamp'") ) |
| 1011 |
add_option($cache_timestamp, '', '', 'no'); |
| 1012 |
|
| 1013 |
update_option($cache_option, $rss); |
| 1014 |
update_option($cache_timestamp, time() ); |
| 1015 |
|
| 1016 |
return $cache_option; |
| 1017 |
} |
| 1018 |
|
| 1019 |
/*=======================================================================*\ |
| 1020 |
Function: get |
| 1021 |
Purpose: fetch an item from the cache |
| 1022 |
Input: url from wich the rss file was fetched |
| 1023 |
Output: cached object on HIT, false on MISS |
| 1024 |
\*=======================================================================*/ |
| 1025 |
function get ($url) { |
| 1026 |
$this->ERROR = ""; |
| 1027 |
$cache_option = 'rss_' . $this->file_name( $url ); |
| 1028 |
|
| 1029 |
if ( ! get_option( $cache_option ) ) { |
| 1030 |
$this->debug( |
| 1031 |
"Cache doesn't contain: $url (cache option: $cache_option)" |
| 1032 |
); |
| 1033 |
return 0; |
| 1034 |
} |
| 1035 |
|
| 1036 |
$rss = get_option( $cache_option ); |
| 1037 |
|
| 1038 |
return $rss; |
| 1039 |
} |
| 1040 |
|
| 1041 |
/*=======================================================================*\ |
| 1042 |
Function: check_cache |
| 1043 |
Purpose: check a url for membership in the cache |
| 1044 |
and whether the object is older then MAX_AGE (ie. STALE) |
| 1045 |
Input: url from wich the rss file was fetched |
| 1046 |
Output: cached object on HIT, false on MISS |
| 1047 |
\*=======================================================================*/ |
| 1048 |
function check_cache ( $url ) { |
| 1049 |
$this->ERROR = ""; |
| 1050 |
$cache_option = $this->file_name( $url ); |
| 1051 |
$cache_timestamp = 'rss_' . $this->file_name( $url ) . '_ts'; |
| 1052 |
|
| 1053 |
if ( $mtime = get_option($cache_timestamp) ) { |
| 1054 |
// find how long ago the file was added to the cache |
| 1055 |
// and whether that is longer then MAX_AGE |
| 1056 |
$age = time() - $mtime; |
| 1057 |
if ( $this->MAX_AGE > $age ) { |
| 1058 |
// object exists and is current |
| 1059 |
return 'HIT'; |
| 1060 |
} |
| 1061 |
else { |
| 1062 |
// object exists but is old |
| 1063 |
return 'STALE'; |
| 1064 |
} |
| 1065 |
} |
| 1066 |
else { |
| 1067 |
// object does not exist |
| 1068 |
return 'MISS'; |
| 1069 |
} |
| 1070 |
} |
| 1071 |
|
| 1072 |
/*=======================================================================*\ |
| 1073 |
Function: serialize |
| 1074 |
\*=======================================================================*/ |
| 1075 |
function serialize ( $rss ) { |
| 1076 |
return serialize( $rss ); |
| 1077 |
} |
| 1078 |
|
| 1079 |
/*=======================================================================*\ |
| 1080 |
Function: unserialize |
| 1081 |
\*=======================================================================*/ |
| 1082 |
function unserialize ( $data ) { |
| 1083 |
return unserialize( $data ); |
| 1084 |
} |
| 1085 |
|
| 1086 |
/*=======================================================================*\ |
| 1087 |
Function: file_name |
| 1088 |
Purpose: map url to location in cache |
| 1089 |
Input: url from wich the rss file was fetched |
| 1090 |
Output: a file name |
| 1091 |
\*=======================================================================*/ |
| 1092 |
function file_name ($url) { |
| 1093 |
return md5( $url ); |
| 1094 |
} |
| 1095 |
|
| 1096 |
/*=======================================================================*\ |
| 1097 |
Function: error |
| 1098 |
Purpose: register error |
| 1099 |
\*=======================================================================*/ |
| 1100 |
function error ($errormsg, $lvl=E_USER_WARNING) { |
| 1101 |
// append PHP's error message if track_errors enabled |
| 1102 |
if ( isset($php_errormsg) ) { |
| 1103 |
$errormsg .= " ($php_errormsg)"; |
| 1104 |
} |
| 1105 |
$this->ERROR = $errormsg; |
| 1106 |
if ( MAGPIE_DEBUG ) { |
| 1107 |
trigger_error( $errormsg, $lvl); |
| 1108 |
} |
| 1109 |
else { |
| 1110 |
error_log( $errormsg, 0); |
| 1111 |
} |
| 1112 |
} |
| 1113 |
function debug ($debugmsg, $lvl=E_USER_NOTICE) { |
| 1114 |
if ( MAGPIE_DEBUG ) { |
| 1115 |
$this->error("MagpieRSS [debug] $debugmsg", $lvl); |
| 1116 |
} |
| 1117 |
} |
| 1118 |
} |
| 1119 |
# --- cut here --- |
| 1120 |
|
| 1121 |
function parse_w3cdtf ( $date_str ) { |
| 1122 |
|
| 1123 |
# regex to match wc3dtf |
| 1124 |
$pat = "/(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2})(:(\d{2}))?(?:([-+])(\d{2}):?(\d{2})|(Z))?/"; |
| 1125 |
|
| 1126 |
if ( preg_match( $pat, $date_str, $match ) ) { |
| 1127 |
list( $year, $month, $day, $hours, $minutes, $seconds) = |
| 1128 |
array( $match[1], $match[2], $match[3], $match[4], $match[5], $match[6]); |
| 1129 |
|
| 1130 |
# calc epoch for current date assuming GMT |
| 1131 |
$epoch = gmmktime( $hours, $minutes, $seconds, $month, $day, $year); |
| 1132 |
|
| 1133 |
$offset = 0; |
| 1134 |
if ( $match[10] == 'Z' ) { |
| 1135 |
# zulu time, aka GMT |
| 1136 |
} |
| 1137 |
else { |
| 1138 |
list( $tz_mod, $tz_hour, $tz_min ) = |
| 1139 |
array( $match[8], $match[9], $match[10]); |
| 1140 |
|
| 1141 |
# zero out the variables |
| 1142 |
if ( ! $tz_hour ) { $tz_hour = 0; } |
| 1143 |
if ( ! $tz_min ) { $tz_min = 0; } |
| 1144 |
|
| 1145 |
$offset_secs = (($tz_hour*60)+$tz_min)*60; |
| 1146 |
|
| 1147 |
# is timezone ahead of GMT? then subtract offset |
| 1148 |
# |
| 1149 |
if ( $tz_mod == '+' ) { |
| 1150 |
$offset_secs = $offset_secs * -1; |
| 1151 |
} |
| 1152 |
|
| 1153 |
$offset = $offset_secs; |
| 1154 |
} |
| 1155 |
$epoch = $epoch + $offset; |
| 1156 |
return $epoch; |
| 1157 |
} |
| 1158 |
else { |
| 1159 |
return -1; |
| 1160 |
} |
| 1161 |
} |
| 1162 |
|
| 1163 |
# WORDPRESS-SPECIFIC: wp_rss (), get_rss () |
| 1164 |
# --- cut here --- |
| 1165 |
function wp_rss ($url, $num) { |
| 1166 |
//ini_set("display_errors", false); uncomment to suppress php errors thrown if the feed is not returned. |
| 1167 |
$num_items = $num; |
| 1168 |
$rss = fetch_rss($url); |
| 1169 |
if ( $rss ) { |
| 1170 |
echo "<ul>"; |
| 1171 |
$rss->items = array_slice($rss->items, 0, $num_items); |
| 1172 |
foreach ($rss->items as $item ) { |
| 1173 |
echo "<li>\n"; |
| 1174 |
echo "<a href='$item[link]' title='$item[description]'>"; |
| 1175 |
echo htmlentities($item['title']); |
| 1176 |
echo "</a><br />\n"; |
| 1177 |
echo "</li>\n"; |
| 1178 |
} |
| 1179 |
echo "</ul>"; |
| 1180 |
} |
| 1181 |
else { |
| 1182 |
echo "an error has occured the feed is probably down, try again later."; |
| 1183 |
} |
| 1184 |
} |
| 1185 |
|
| 1186 |
function get_rss ($uri, $num = 5) { // Like get posts, but for RSS |
| 1187 |
$rss = fetch_rss($url); |
| 1188 |
if ( $rss ) { |
| 1189 |
$rss->items = array_slice($rss->items, 0, $num_items); |
| 1190 |
foreach ($rss->items as $item ) { |
| 1191 |
echo "<li>\n"; |
| 1192 |
echo "<a href='$item[link]' title='$item[description]'>"; |
| 1193 |
echo htmlentities($item['title']); |
| 1194 |
echo "</a><br />\n"; |
| 1195 |
echo "</li>\n"; |
| 1196 |
} |
| 1197 |
return $posts; |
| 1198 |
} else { |
| 1199 |
return false; |
| 1200 |
} |
| 1201 |
} |
| 1202 |
# --- cut here --- |
| 1203 |
?> |
