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Edit File : rss.php \| Size : 22.44 KB
<?php /** * MagpieRSS: a simple RSS integration tool * * A compiled file for RSS syndication * * @author Kellan Elliott-McCrea <kellan@protest.net> * @version 0.51 * @license GPL * * @package External * @subpackage MagpieRSS * @deprecated 3.0.0 Use SimplePie instead. / /* * Deprecated. Use SimplePie (class-simplepie.php) instead. / _deprecated_file( basename( __FILE__ ), '3.0.0', WPINC . '/class-simplepie.php' ); /* * Fires before MagpieRSS is loaded, to optionally replace it. * * @since 2.3.0 * @deprecated 3.0.0 / do_action( 'load_feed_engine' ); /* RSS feed constant. / define('RSS', 'RSS'); define('ATOM', 'Atom'); define('MAGPIE_USER_AGENT', 'WordPress/' . $GLOBALS['wp_version']); class MagpieRSS { var $parser; var $current_item = array(); // item currently being parsed var $items = array(); // collection of parsed items var $channel = array(); // hash of channel fields var $textinput = array(); var $image = array(); var $feed_type; var $feed_version; // parser variables var $stack = array(); // parser stack var $inchannel = false; var $initem = false; var $incontent = false; // if in Atom <content mode="xml"> field var $intextinput = false; var $inimage = false; var $current_field = ''; var $current_namespace = false; //var $ERROR = ""; var $_CONTENT_CONSTRUCTS = array('content', 'summary', 'info', 'title', 'tagline', 'copyright'); /* * PHP5 constructor. / function __construct( $source ) { # Check if PHP xml isn't compiled # if ( ! function_exists('xml_parser_create') ) { return trigger_error( "PHP's XML extension is not available. Please contact your hosting provider to enable PHP's XML extension." ); } $parser = xml_parser_create(); $this->parser = $parser; # pass in parser, and a reference to this object # set up handlers # xml_set_object( $this->parser, $this ); xml_set_element_handler($this->parser, 'feed_start_element', 'feed_end_element' ); xml_set_character_data_handler( $this->parser, 'feed_cdata' ); $status = xml_parse( $this->parser, $source ); if (! $status ) { $errorcode = xml_get_error_code( $this->parser ); if ( $errorcode != XML_ERROR_NONE ) { $xml_error = xml_error_string( $errorcode ); $error_line = xml_get_current_line_number($this->parser); $error_col = xml_get_current_column_number($this->parser); $errormsg = "$xml_error at line $error_line, column $error_col"; $this->error( $errormsg ); } } xml_parser_free( $this->parser ); unset( $this->parser ); $this->normalize(); } /* * PHP4 constructor. / public function MagpieRSS( $source ) { self::__construct( $source ); } function feed_start_element($p, $element, &$attrs) { $el = $element = strtolower($element); $attrs = array_change_key_case($attrs, CASE_LOWER); // check for a namespace, and split if found $ns = false; if ( strpos( $element, ':' ) ) { list($ns, $el) = explode( ':', $element, 2); } if ( $ns and $ns != 'rdf' ) { $this->current_namespace = $ns; } # if feed type isn't set, then this is first element of feed # identify feed from root element # if (!isset($this->feed_type) ) { if ( $el == 'rdf' ) { $this->feed_type = RSS; $this->feed_version = '1.0'; } elseif ( $el == 'rss' ) { $this->feed_type = RSS; $this->feed_version = $attrs['version']; } elseif ( $el == 'feed' ) { $this->feed_type = ATOM; $this->feed_version = $attrs['version']; $this->inchannel = true; } return; } if ( $el == 'channel' ) { $this->inchannel = true; } elseif ($el == 'item' or $el == 'entry' ) { $this->initem = true; if ( isset($attrs['rdf:about']) ) { $this->current_item['about'] = $attrs['rdf:about']; } } // if we're in the default namespace of an RSS feed, // record textinput or image fields elseif ( $this->feed_type == RSS and $this->current_namespace == '' and $el == 'textinput' ) { $this->intextinput = true; } elseif ( $this->feed_type == RSS and $this->current_namespace == '' and $el == 'image' ) { $this->inimage = true; } # handle atom content constructs elseif ( $this->feed_type == ATOM and in_array($el, $this->_CONTENT_CONSTRUCTS) ) { // avoid clashing w/ RSS mod_content if ($el == 'content' ) { $el = 'atom_content'; } $this->incontent = $el; } // if inside an Atom content construct (e.g. content or summary) field treat tags as text elseif ($this->feed_type == ATOM and $this->incontent ) { // if tags are inlined, then flatten $attrs_str = join(' ', array_map(array('MagpieRSS', 'map_attrs'), array_keys($attrs), array_values($attrs) ) ); $this->append_content( "<$element $attrs_str>" ); array_unshift( $this->stack, $el ); } // Atom support many links per containging element. // Magpie treats link elements of type rel='alternate' // as being equivalent to RSS's simple link element. // elseif ($this->feed_type == ATOM and $el == 'link' ) { if ( isset($attrs['rel']) and $attrs['rel'] == 'alternate' ) { $link_el = 'link'; } else { $link_el = 'link_' . $attrs['rel']; } $this->append($link_el, $attrs['href']); } // set stack[0] to current element else { array_unshift($this->stack, $el); } } function feed_cdata ($p, $text) { if ($this->feed_type == ATOM and $this->incontent) { $this->append_content( $text ); } else { $current_el = join('_', array_reverse($this->stack)); $this->append($current_el, $text); } } function feed_end_element ($p, $el) { $el = strtolower($el); if ( $el == 'item' or $el == 'entry' ) { $this->items[] = $this->current_item; $this->current_item = array(); $this->initem = false; } elseif ($this->feed_type == RSS and $this->current_namespace == '' and $el == 'textinput' ) { $this->intextinput = false; } elseif ($this->feed_type == RSS and $this->current_namespace == '' and $el == 'image' ) { $this->inimage = false; } elseif ($this->feed_type == ATOM and in_array($el, $this->_CONTENT_CONSTRUCTS) ) { $this->incontent = false; } elseif ($el == 'channel' or $el == 'feed' ) { $this->inchannel = false; } elseif ($this->feed_type == ATOM and $this->incontent ) { // balance tags properly // note: This may not actually be necessary if ( $this->stack[0] == $el ) { $this->append_content("</$el>"); } else { $this->append_content("<$el />"); } array_shift( $this->stack ); } else { array_shift( $this->stack ); } $this->current_namespace = false; } function concat (&$str1, $str2="") { if (!isset($str1) ) { $str1=""; } $str1 .= $str2; } function append_content($text) { if ( $this->initem ) { $this->concat( $this->current_item[ $this->incontent ], $text ); } elseif ( $this->inchannel ) { $this->concat( $this->channel[ $this->incontent ], $text ); } } // smart append - field and namespace aware function append($el, $text) { if (!$el) { return; } if ( $this->current_namespace ) { if ( $this->initem ) { $this->concat( $this->current_item[ $this->current_namespace ][ $el ], $text); } elseif ($this->inchannel) { $this->concat( $this->channel[ $this->current_namespace][ $el ], $text ); } elseif ($this->intextinput) { $this->concat( $this->textinput[ $this->current_namespace][ $el ], $text ); } elseif ($this->inimage) { $this->concat( $this->image[ $this->current_namespace ][ $el ], $text ); } } else { if ( $this->initem ) { $this->concat( $this->current_item[ $el ], $text); } elseif ($this->intextinput) { $this->concat( $this->textinput[ $el ], $text ); } elseif ($this->inimage) { $this->concat( $this->image[ $el ], $text ); } elseif ($this->inchannel) { $this->concat( $this->channel[ $el ], $text ); } } } function normalize () { // if atom populate rss fields if ( $this->is_atom() ) { $this->channel['descripton'] = $this->channel['tagline']; for ( $i = 0; $i < count($this->items); $i++) { $item = $this->items[$i]; if ( isset($item['summary']) ) $item['description'] = $item['summary']; if ( isset($item['atom_content'])) $item['content']['encoded'] = $item['atom_content']; $this->items[$i] = $item; } } elseif ( $this->is_rss() ) { $this->channel['tagline'] = $this->channel['description']; for ( $i = 0; $i < count($this->items); $i++) { $item = $this->items[$i]; if ( isset($item['description'])) $item['summary'] = $item['description']; if ( isset($item['content']['encoded'] ) ) $item['atom_content'] = $item['content']['encoded']; $this->items[$i] = $item; } } } function is_rss () { if ( $this->feed_type == RSS ) { return $this->feed_version; } else { return false; } } function is_atom() { if ( $this->feed_type == ATOM ) { return $this->feed_version; } else { return false; } } function map_attrs($k, $v) { return "$k=\"$v\""; } function error( $errormsg, $lvl = E_USER_WARNING ) { if ( MAGPIE_DEBUG ) { trigger_error( $errormsg, $lvl); } else { error_log( $errormsg, 0); } } } if ( !function_exists('fetch_rss') ) : /* * Build Magpie object based on RSS from URL. * * @since 1.5.0 * @package External * @subpackage MagpieRSS * * @param string $url URL to retrieve feed * @return bool\|MagpieRSS false on failure or MagpieRSS object on success. / function fetch_rss ($url) { // initialize constants init(); if ( !isset($url) ) { // error("fetch_rss called without a url"); return false; } // if cache is disabled if ( !MAGPIE_CACHE_ON ) { // fetch file, and parse it $resp = _fetch_remote_file( $url ); if ( is_success( $resp->status ) ) { return _response_to_rss( $resp ); } else { // error("Failed to fetch $url and cache is off"); return false; } } // else cache is ON else { // Flow // 1. check cache // 2. if there is a hit, make sure it's fresh // 3. if cached obj fails freshness check, fetch remote // 4. if remote fails, return stale object, or error $cache = new RSSCache( MAGPIE_CACHE_DIR, MAGPIE_CACHE_AGE ); if (MAGPIE_DEBUG and $cache->ERROR) { debug($cache->ERROR, E_USER_WARNING); } $cache_status = 0; // response of check_cache $request_headers = array(); // HTTP headers to send with fetch $rss = 0; // parsed RSS object $errormsg = 0; // errors, if any if (!$cache->ERROR) { // return cache HIT, MISS, or STALE $cache_status = $cache->check_cache( $url ); } // if object cached, and cache is fresh, return cached obj if ( $cache_status == 'HIT' ) { $rss = $cache->get( $url ); if ( isset($rss) and $rss ) { $rss->from_cache = 1; if ( MAGPIE_DEBUG > 1) { debug("MagpieRSS: Cache HIT", E_USER_NOTICE); } return $rss; } } // else attempt a conditional get // set up headers if ( $cache_status == 'STALE' ) { $rss = $cache->get( $url ); if ( isset($rss->etag) and $rss->last_modified ) { $request_headers['If-None-Match'] = $rss->etag; $request_headers['If-Last-Modified'] = $rss->last_modified; } } $resp = _fetch_remote_file( $url, $request_headers ); if (isset($resp) and $resp) { if ($resp->status == '304' ) { // we have the most current copy if ( MAGPIE_DEBUG > 1) { debug("Got 304 for $url"); } // reset cache on 304 (at minutillo insistent prodding) $cache->set($url, $rss); return $rss; } elseif ( is_success( $resp->status ) ) { $rss = _response_to_rss( $resp ); if ( $rss ) { if (MAGPIE_DEBUG > 1) { debug("Fetch successful"); } // add object to cache $cache->set( $url, $rss ); return $rss; } } else { $errormsg = "Failed to fetch $url. "; if ( $resp->error ) { # compensate for Snoopy's annoying habbit to tacking # on '\n' $http_error = substr($resp->error, 0, -2); $errormsg .= "(HTTP Error: $http_error)"; } else { $errormsg .= "(HTTP Response: " . $resp->response_code .')'; } } } else { $errormsg = "Unable to retrieve RSS file for unknown reasons."; } // else fetch failed // attempt to return cached object if ($rss) { if ( MAGPIE_DEBUG ) { debug("Returning STALE object for $url"); } return $rss; } // else we totally failed // error( $errormsg ); return false; } // end if ( !MAGPIE_CACHE_ON ) { } // end fetch_rss() endif; /* * Retrieve URL headers and content using WP HTTP Request API. * * @since 1.5.0 * @package External * @subpackage MagpieRSS * * @param string $url URL to retrieve * @param array $headers Optional. Headers to send to the URL. * @return Snoopy style response / function _fetch_remote_file($url, $headers = "" ) { $resp = wp_safe_remote_request( $url, array( 'headers' => $headers, 'timeout' => MAGPIE_FETCH_TIME_OUT ) ); if ( is_wp_error($resp) ) { $error = array_shift($resp->errors); $resp = new stdClass; $resp->status = 500; $resp->response_code = 500; $resp->error = $error[0] . "\n"; //\n = Snoopy compatibility return $resp; } // Snoopy returns headers unprocessed. // Also note, WP_HTTP lowercases all keys, Snoopy did not. $return_headers = array(); foreach ( wp_remote_retrieve_headers( $resp ) as $key => $value ) { if ( !is_array($value) ) { $return_headers[] = "$key: $value"; } else { foreach ( $value as $v ) $return_headers[] = "$key: $v"; } } $response = new stdClass; $response->status = wp_remote_retrieve_response_code( $resp ); $response->response_code = wp_remote_retrieve_response_code( $resp ); $response->headers = $return_headers; $response->results = wp_remote_retrieve_body( $resp ); return $response; } /* * Retrieve * * @since 1.5.0 * @package External * @subpackage MagpieRSS * * @param array $resp * @return MagpieRSS\|bool / function _response_to_rss ($resp) { $rss = new MagpieRSS( $resp->results ); // if RSS parsed successfully if ( $rss && (!isset($rss->ERROR) \|\| !$rss->ERROR) ) { // find Etag, and Last-Modified foreach ( (array) $resp->headers as $h) { // 2003-03-02 - Nicola Asuni (www.tecnick.com) - fixed bug "Undefined offset: 1" if (strpos($h, ": ")) { list($field, $val) = explode(": ", $h, 2); } else { $field = $h; $val = ""; } if ( $field == 'etag' ) { $rss->etag = $val; } if ( $field == 'last-modified' ) { $rss->last_modified = $val; } } return $rss; } // else construct error message else { $errormsg = "Failed to parse RSS file."; if ($rss) { $errormsg .= " (" . $rss->ERROR . ")"; } // error($errormsg); return false; } // end if ($rss and !$rss->error) } /* * Set up constants with default values, unless user overrides. * * @since 1.5.0 * @package External * @subpackage MagpieRSS / function init () { if ( defined('MAGPIE_INITALIZED') ) { return; } else { define('MAGPIE_INITALIZED', 1); } if ( !defined('MAGPIE_CACHE_ON') ) { define('MAGPIE_CACHE_ON', 1); } if ( !defined('MAGPIE_CACHE_DIR') ) { define('MAGPIE_CACHE_DIR', './cache'); } if ( !defined('MAGPIE_CACHE_AGE') ) { define('MAGPIE_CACHE_AGE', 6060); // one hour } if ( !defined('MAGPIE_CACHE_FRESH_ONLY') ) { define('MAGPIE_CACHE_FRESH_ONLY', 0); } if ( !defined('MAGPIE_DEBUG') ) { define('MAGPIE_DEBUG', 0); } if ( !defined('MAGPIE_USER_AGENT') ) { $ua = 'WordPress/' . $GLOBALS['wp_version']; if ( MAGPIE_CACHE_ON ) { $ua = $ua . ')'; } else { $ua = $ua . '; No cache)'; } define('MAGPIE_USER_AGENT', $ua); } if ( !defined('MAGPIE_FETCH_TIME_OUT') ) { define('MAGPIE_FETCH_TIME_OUT', 2); // 2 second timeout } // use gzip encoding to fetch rss files if supported? if ( !defined('MAGPIE_USE_GZIP') ) { define('MAGPIE_USE_GZIP', true); } } function is_info ($sc) { return $sc >= 100 && $sc < 200; } function is_success ($sc) { return $sc >= 200 && $sc < 300; } function is_redirect ($sc) { return $sc >= 300 && $sc < 400; } function is_error ($sc) { return $sc >= 400 && $sc < 600; } function is_client_error ($sc) { return $sc >= 400 && $sc < 500; } function is_server_error ($sc) { return $sc >= 500 && $sc < 600; } class RSSCache { var $BASE_CACHE; // where the cache files are stored var $MAX_AGE = 43200; // when are files stale, default twelve hours var $ERROR = ''; // accumulate error messages /** * PHP5 constructor. / function __construct( $base = '', $age = '' ) { $this->BASE_CACHE = WP_CONTENT_DIR . '/cache'; if ( $base ) { $this->BASE_CACHE = $base; } if ( $age ) { $this->MAX_AGE = $age; } } /* * PHP4 constructor. / public function RSSCache( $base = '', $age = '' ) { self::__construct( $base, $age ); } /=======================================================================\ Function: set Purpose: add an item to the cache, keyed on url Input: url from which the rss file was fetched Output: true on success \=======================================================================/ function set ($url, $rss) { $cache_option = 'rss_' . $this->file_name( $url ); set_transient($cache_option, $rss, $this->MAX_AGE); return $cache_option; } /=======================================================================\ Function: get Purpose: fetch an item from the cache Input: url from which the rss file was fetched Output: cached object on HIT, false on MISS \=======================================================================/ function get ($url) { $this->ERROR = ""; $cache_option = 'rss_' . $this->file_name( $url ); if ( ! $rss = get_transient( $cache_option ) ) { $this->debug( "Cache doesn't contain: $url (cache option: $cache_option)" ); return 0; } return $rss; } /=======================================================================\ Function: check_cache Purpose: check a url for membership in the cache and whether the object is older then MAX_AGE (ie. STALE) Input: url from which the rss file was fetched Output: cached object on HIT, false on MISS \=======================================================================/ function check_cache ( $url ) { $this->ERROR = ""; $cache_option = 'rss_' . $this->file_name( $url ); if ( get_transient($cache_option) ) { // object exists and is current return 'HIT'; } else { // object does not exist return 'MISS'; } } /=======================================================================\ Function: serialize \=======================================================================/ function serialize ( $rss ) { return serialize( $rss ); } /=======================================================================\ Function: unserialize \=======================================================================/ function unserialize ( $data ) { return unserialize( $data ); } /=======================================================================\ Function: file_name Purpose: map url to location in cache Input: url from which the rss file was fetched Output: a file name \=======================================================================/ function file_name ($url) { return md5( $url ); } /=======================================================================\ Function: error Purpose: register error \=======================================================================/ function error ($errormsg, $lvl=E_USER_WARNING) { $this->ERROR = $errormsg; if ( MAGPIE_DEBUG ) { trigger_error( $errormsg, $lvl); } else { error_log( $errormsg, 0); } } function debug ($debugmsg, $lvl=E_USER_NOTICE) { if ( MAGPIE_DEBUG ) { $this->error("MagpieRSS [debug] $debugmsg", $lvl); } } } if ( !function_exists('parse_w3cdtf') ) : function parse_w3cdtf ( $date_str ) { # regex to match wc3dtf $pat = "/(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2})(:(\d{2}))?(?:([-+])(\d{2}):?(\d{2})\|(Z))?/"; if ( preg_match( $pat, $date_str, $match ) ) { list( $year, $month, $day, $hours, $minutes, $seconds) = array( $match[1], $match[2], $match[3], $match[4], $match[5], $match[7]); # calc epoch for current date assuming GMT $epoch = gmmktime( $hours, $minutes, $seconds, $month, $day, $year); $offset = 0; if ( $match[11] == 'Z' ) { # zulu time, aka GMT } else { list( $tz_mod, $tz_hour, $tz_min ) = array( $match[8], $match[9], $match[10]); # zero out the variables if ( ! $tz_hour ) { $tz_hour = 0; } if ( ! $tz_min ) { $tz_min = 0; } $offset_secs = (($tz_hour60)+$tz_min)60; # is timezone ahead of GMT? then subtract offset # if ( $tz_mod == '+' ) { $offset_secs = $offset_secs -1; } $offset = $offset_secs; } $epoch = $epoch + $offset; return $epoch; } else { return -1; } } endif; if ( !function_exists('wp_rss') ) : /** * Display all RSS items in a HTML ordered list. * * @since 1.5.0 * @package External * @subpackage MagpieRSS * * @param string $url URL of feed to display. Will not auto sense feed URL. * @param int $num_items Optional. Number of items to display, default is all. / function wp_rss( $url, $num_items = -1 ) { if ( $rss = fetch_rss( $url ) ) { echo '<ul>'; if ( $num_items !== -1 ) { $rss->items = array_slice( $rss->items, 0, $num_items ); } foreach ( (array) $rss->items as $item ) { printf( '<li><a href="%1$s" title="%2$s">%3$s</a></li>', esc_url( $item['link'] ), esc_attr( strip_tags( $item['description'] ) ), esc_html( $item['title'] ) ); } echo '</ul>'; } else { _e( 'An error has occurred, which probably means the feed is down. Try again later.' ); } } endif; if ( !function_exists('get_rss') ) : /* * Display RSS items in HTML list items. * * You have to specify which HTML list you want, either ordered or unordered * before using the function. You also have to specify how many items you wish * to display. You can't display all of them like you can with wp_rss() * function. * * @since 1.5.0 * @package External * @subpackage MagpieRSS * * @param string $url URL of feed to display. Will not auto sense feed URL. * @param int $num_items Optional. Number of items to display, default is all. * @return bool False on failure. */ function get_rss ($url, $num_items = 5) { // Like get posts, but for RSS $rss = fetch_rss($url); if ( $rss ) { $rss->items = array_slice($rss->items, 0, $num_items); foreach ( (array) $rss->items as $item ) { echo "<li>\n"; echo "<a href='$item[link]' title='$item[description]'>"; echo esc_html($item['title']); echo "</a><br />\n"; echo "</li>\n"; } } else { return false; } } endif; Back

Edit File : rss.php | Size : 22.44 KB

<?php
/**
 * MagpieRSS: a simple RSS integration tool
 *
 * A compiled file for RSS syndication
 *
 * @author Kellan Elliott-McCrea <kellan@protest.net>
 * @version 0.51
 * @license GPL
 *
 * @package External
 * @subpackage MagpieRSS
 * @deprecated 3.0.0 Use SimplePie instead.
 */

/**
 * Deprecated. Use SimplePie (class-simplepie.php) instead.
 */
_deprecated_file( basename( __FILE__ ), '3.0.0', WPINC . '/class-simplepie.php' );

/**
 * Fires before MagpieRSS is loaded, to optionally replace it.
 *
 * @since 2.3.0
 * @deprecated 3.0.0
 */
do_action( 'load_feed_engine' );

/** RSS feed constant. */
define('RSS', 'RSS');
define('ATOM', 'Atom');
define('MAGPIE_USER_AGENT', 'WordPress/' . $GLOBALS['wp_version']);

class MagpieRSS {
	var $parser;
	var $current_item	= array();	// item currently being parsed
	var $items			= array();	// collection of parsed items
	var $channel		= array();	// hash of channel fields
	var $textinput		= array();
	var $image			= array();
	var $feed_type;
	var $feed_version;

// parser variables
	var $stack				= array(); // parser stack
	var $inchannel			= false;
	var $initem 			= false;
	var $incontent			= false; // if in Atom <content mode="xml"> field
	var $intextinput		= false;
	var $inimage 			= false;
	var $current_field		= '';
	var $current_namespace	= false;

//var $ERROR = "";

var $_CONTENT_CONSTRUCTS = array('content', 'summary', 'info', 'title', 'tagline', 'copyright');

/**
	 * PHP5 constructor.
	 */
	function __construct( $source ) {

# Check if PHP xml isn't compiled
		#
		if ( ! function_exists('xml_parser_create') ) {
			return trigger_error( "PHP's XML extension is not available. Please contact your hosting provider to enable PHP's XML extension." );
		}

$parser = xml_parser_create();

$this->parser = $parser;

# pass in parser, and a reference to this object
		# set up handlers
		#
		xml_set_object( $this->parser, $this );
		xml_set_element_handler($this->parser,
				'feed_start_element', 'feed_end_element' );

xml_set_character_data_handler( $this->parser, 'feed_cdata' );

$status = xml_parse( $this->parser, $source );

if (! $status ) {
			$errorcode = xml_get_error_code( $this->parser );
			if ( $errorcode != XML_ERROR_NONE ) {
				$xml_error = xml_error_string( $errorcode );
				$error_line = xml_get_current_line_number($this->parser);
				$error_col = xml_get_current_column_number($this->parser);
				$errormsg = "$xml_error at line $error_line, column $error_col";

$this->error( $errormsg );
			}
		}

xml_parser_free( $this->parser );
		unset( $this->parser );

$this->normalize();
	}

/**
	 * PHP4 constructor.
	 */
	public function MagpieRSS( $source ) {
		self::__construct( $source );
	}

function feed_start_element($p, $element, &$attrs) {
		$el = $element = strtolower($element);
		$attrs = array_change_key_case($attrs, CASE_LOWER);

// check for a namespace, and split if found
		$ns	= false;
		if ( strpos( $element, ':' ) ) {
			list($ns, $el) = explode( ':', $element, 2);
		}
		if ( $ns and $ns != 'rdf' ) {
			$this->current_namespace = $ns;
		}

# if feed type isn't set, then this is first element of feed
		# identify feed from root element
		#
		if (!isset($this->feed_type) ) {
			if ( $el == 'rdf' ) {
				$this->feed_type = RSS;
				$this->feed_version = '1.0';
			}
			elseif ( $el == 'rss' ) {
				$this->feed_type = RSS;
				$this->feed_version = $attrs['version'];
			}
			elseif ( $el == 'feed' ) {
				$this->feed_type = ATOM;
				$this->feed_version = $attrs['version'];
				$this->inchannel = true;
			}
			return;
		}

if ( $el == 'channel' )
		{
			$this->inchannel = true;
		}
		elseif ($el == 'item' or $el == 'entry' )
		{
			$this->initem = true;
			if ( isset($attrs['rdf:about']) ) {
				$this->current_item['about'] = $attrs['rdf:about'];
			}
		}

// if we're in the default namespace of an RSS feed,
		//  record textinput or image fields
		elseif (
			$this->feed_type == RSS and
			$this->current_namespace == '' and
			$el == 'textinput' )
		{
			$this->intextinput = true;
		}

elseif (
			$this->feed_type == RSS and
			$this->current_namespace == '' and
			$el == 'image' )
		{
			$this->inimage = true;
		}

# handle atom content constructs
		elseif ( $this->feed_type == ATOM and in_array($el, $this->_CONTENT_CONSTRUCTS) )
		{
			// avoid clashing w/ RSS mod_content
			if ($el == 'content' ) {
				$el = 'atom_content';
			}

$this->incontent = $el;

}

// if inside an Atom content construct (e.g. content or summary) field treat tags as text
		elseif ($this->feed_type == ATOM and $this->incontent )
		{
			// if tags are inlined, then flatten
			$attrs_str = join(' ',
					array_map(array('MagpieRSS', 'map_attrs'),
					array_keys($attrs),
					array_values($attrs) ) );

$this->append_content( "<$element $attrs_str>"  );

array_unshift( $this->stack, $el );
		}

// Atom support many links per containging element.
		// Magpie treats link elements of type rel='alternate'
		// as being equivalent to RSS's simple link element.
		//
		elseif ($this->feed_type == ATOM and $el == 'link' )
		{
			if ( isset($attrs['rel']) and $attrs['rel'] == 'alternate' )
			{
				$link_el = 'link';
			}
			else {
				$link_el = 'link_' . $attrs['rel'];
			}

$this->append($link_el, $attrs['href']);
		}
		// set stack[0] to current element
		else {
			array_unshift($this->stack, $el);
		}
	}

function feed_cdata ($p, $text) {

if ($this->feed_type == ATOM and $this->incontent)
		{
			$this->append_content( $text );
		}
		else {
			$current_el = join('_', array_reverse($this->stack));
			$this->append($current_el, $text);
		}
	}

function feed_end_element ($p, $el) {
		$el = strtolower($el);

if ( $el == 'item' or $el == 'entry' )
		{
			$this->items[] = $this->current_item;
			$this->current_item = array();
			$this->initem = false;
		}
		elseif ($this->feed_type == RSS and $this->current_namespace == '' and $el == 'textinput' )
		{
			$this->intextinput = false;
		}
		elseif ($this->feed_type == RSS and $this->current_namespace == '' and $el == 'image' )
		{
			$this->inimage = false;
		}
		elseif ($this->feed_type == ATOM and in_array($el, $this->_CONTENT_CONSTRUCTS) )
		{
			$this->incontent = false;
		}
		elseif ($el == 'channel' or $el == 'feed' )
		{
			$this->inchannel = false;
		}
		elseif ($this->feed_type == ATOM and $this->incontent  ) {
			// balance tags properly
			// note: This may not actually be necessary
			if ( $this->stack[0] == $el )
			{
				$this->append_content("</$el>");
			}
			else {
				$this->append_content("<$el />");
			}

array_shift( $this->stack );
		}
		else {
			array_shift( $this->stack );
		}

$this->current_namespace = false;
	}

function concat (&$str1, $str2="") {
		if (!isset($str1) ) {
			$str1="";
		}
		$str1 .= $str2;
	}

function append_content($text) {
		if ( $this->initem ) {
			$this->concat( $this->current_item[ $this->incontent ], $text );
		}
		elseif ( $this->inchannel ) {
			$this->concat( $this->channel[ $this->incontent ], $text );
		}
	}

// smart append - field and namespace aware
	function append($el, $text) {
		if (!$el) {
			return;
		}
		if ( $this->current_namespace )
		{
			if ( $this->initem ) {
				$this->concat(
					$this->current_item[ $this->current_namespace ][ $el ], $text);
			}
			elseif ($this->inchannel) {
				$this->concat(
					$this->channel[ $this->current_namespace][ $el ], $text );
			}
			elseif ($this->intextinput) {
				$this->concat(
					$this->textinput[ $this->current_namespace][ $el ], $text );
			}
			elseif ($this->inimage) {
				$this->concat(
					$this->image[ $this->current_namespace ][ $el ], $text );
			}
		}
		else {
			if ( $this->initem ) {
				$this->concat(
					$this->current_item[ $el ], $text);
			}
			elseif ($this->intextinput) {
				$this->concat(
					$this->textinput[ $el ], $text );
			}
			elseif ($this->inimage) {
				$this->concat(
					$this->image[ $el ], $text );
			}
			elseif ($this->inchannel) {
				$this->concat(
					$this->channel[ $el ], $text );
			}

}
	}

function normalize () {
		// if atom populate rss fields
		if ( $this->is_atom() ) {
			$this->channel['descripton'] = $this->channel['tagline'];
			for ( $i = 0; $i < count($this->items); $i++) {
				$item = $this->items[$i];
				if ( isset($item['summary']) )
					$item['description'] = $item['summary'];
				if ( isset($item['atom_content']))
					$item['content']['encoded'] = $item['atom_content'];

$this->items[$i] = $item;
			}
		}
		elseif ( $this->is_rss() ) {
			$this->channel['tagline'] = $this->channel['description'];
			for ( $i = 0; $i < count($this->items); $i++) {
				$item = $this->items[$i];
				if ( isset($item['description']))
					$item['summary'] = $item['description'];
				if ( isset($item['content']['encoded'] ) )
					$item['atom_content'] = $item['content']['encoded'];

$this->items[$i] = $item;
			}
		}
	}

function is_rss () {
		if ( $this->feed_type == RSS ) {
			return $this->feed_version;
		}
		else {
			return false;
		}
	}

function is_atom() {
		if ( $this->feed_type == ATOM ) {
			return $this->feed_version;
		}
		else {
			return false;
		}
	}

function map_attrs($k, $v) {
		return "$k=\"$v\"";
	}

function error( $errormsg, $lvl = E_USER_WARNING ) {
		if ( MAGPIE_DEBUG ) {
			trigger_error( $errormsg, $lvl);
		} else {
			error_log( $errormsg, 0);
		}
	}

}

if ( !function_exists('fetch_rss') ) :
/**
 * Build Magpie object based on RSS from URL.
 *
 * @since 1.5.0
 * @package External
 * @subpackage MagpieRSS
 *
 * @param string $url URL to retrieve feed
 * @return bool|MagpieRSS false on failure or MagpieRSS object on success.
 */
function fetch_rss ($url) {
	// initialize constants
	init();

if ( !isset($url) ) {
		// error("fetch_rss called without a url");
		return false;
	}

// if cache is disabled
	if ( !MAGPIE_CACHE_ON ) {
		// fetch file, and parse it
		$resp = _fetch_remote_file( $url );
		if ( is_success( $resp->status ) ) {
			return _response_to_rss( $resp );
		}
		else {
			// error("Failed to fetch $url and cache is off");
			return false;
		}
	}
	// else cache is ON
	else {
		// Flow
		// 1. check cache
		// 2. if there is a hit, make sure it's fresh
		// 3. if cached obj fails freshness check, fetch remote
		// 4. if remote fails, return stale object, or error

$cache = new RSSCache( MAGPIE_CACHE_DIR, MAGPIE_CACHE_AGE );

if (MAGPIE_DEBUG and $cache->ERROR) {
			debug($cache->ERROR, E_USER_WARNING);
		}

$cache_status 	 = 0;		// response of check_cache
		$request_headers = array(); // HTTP headers to send with fetch
		$rss 			 = 0;		// parsed RSS object
		$errormsg		 = 0;		// errors, if any

if (!$cache->ERROR) {
			// return cache HIT, MISS, or STALE
			$cache_status = $cache->check_cache( $url );
		}

// if object cached, and cache is fresh, return cached obj
		if ( $cache_status == 'HIT' ) {
			$rss = $cache->get( $url );
			if ( isset($rss) and $rss ) {
				$rss->from_cache = 1;
				if ( MAGPIE_DEBUG > 1) {
				debug("MagpieRSS: Cache HIT", E_USER_NOTICE);
			}
				return $rss;
			}
		}

// else attempt a conditional get

// set up headers
		if ( $cache_status == 'STALE' ) {
			$rss = $cache->get( $url );
			if ( isset($rss->etag) and $rss->last_modified ) {
				$request_headers['If-None-Match'] = $rss->etag;
				$request_headers['If-Last-Modified'] = $rss->last_modified;
			}
		}

$resp = _fetch_remote_file( $url, $request_headers );

if (isset($resp) and $resp) {
			if ($resp->status == '304' ) {
				// we have the most current copy
				if ( MAGPIE_DEBUG > 1) {
					debug("Got 304 for $url");
				}
				// reset cache on 304 (at minutillo insistent prodding)
				$cache->set($url, $rss);
				return $rss;
			}
			elseif ( is_success( $resp->status ) ) {
				$rss = _response_to_rss( $resp );
				if ( $rss ) {
					if (MAGPIE_DEBUG > 1) {
						debug("Fetch successful");
					}
					// add object to cache
					$cache->set( $url, $rss );
					return $rss;
				}
			}
			else {
				$errormsg = "Failed to fetch $url. ";
				if ( $resp->error ) {
					# compensate for Snoopy's annoying habbit to tacking
					# on '\n'
					$http_error = substr($resp->error, 0, -2);
					$errormsg .= "(HTTP Error: $http_error)";
				}
				else {
					$errormsg .=  "(HTTP Response: " . $resp->response_code .')';
				}
			}
		}
		else {
			$errormsg = "Unable to retrieve RSS file for unknown reasons.";
		}

// else fetch failed

// attempt to return cached object
		if ($rss) {
			if ( MAGPIE_DEBUG ) {
				debug("Returning STALE object for $url");
			}
			return $rss;
		}

// else we totally failed
		// error( $errormsg );

return false;

} // end if ( !MAGPIE_CACHE_ON ) {
} // end fetch_rss()
endif;

/**
 * Retrieve URL headers and content using WP HTTP Request API.
 *
 * @since 1.5.0
 * @package External
 * @subpackage MagpieRSS
 *
 * @param string $url URL to retrieve
 * @param array $headers Optional. Headers to send to the URL.
 * @return Snoopy style response
 */
function _fetch_remote_file($url, $headers = "" ) {
	$resp = wp_safe_remote_request( $url, array( 'headers' => $headers, 'timeout' => MAGPIE_FETCH_TIME_OUT ) );
	if ( is_wp_error($resp) ) {
		$error = array_shift($resp->errors);

$resp = new stdClass;
		$resp->status = 500;
		$resp->response_code = 500;
		$resp->error = $error[0] . "\n"; //\n = Snoopy compatibility
		return $resp;
	}

// Snoopy returns headers unprocessed.
	// Also note, WP_HTTP lowercases all keys, Snoopy did not.
	$return_headers = array();
	foreach ( wp_remote_retrieve_headers( $resp ) as $key => $value ) {
		if ( !is_array($value) ) {
			$return_headers[] = "$key: $value";
		} else {
			foreach ( $value as $v )
				$return_headers[] = "$key: $v";
		}
	}

$response = new stdClass;
	$response->status = wp_remote_retrieve_response_code( $resp );
	$response->response_code = wp_remote_retrieve_response_code( $resp );
	$response->headers = $return_headers;
	$response->results = wp_remote_retrieve_body( $resp );

return $response;
}

/**
 * Retrieve
 *
 * @since 1.5.0
 * @package External
 * @subpackage MagpieRSS
 *
 * @param array $resp
 * @return MagpieRSS|bool
 */
function _response_to_rss ($resp) {
	$rss = new MagpieRSS( $resp->results );

// if RSS parsed successfully
	if ( $rss && (!isset($rss->ERROR) || !$rss->ERROR) ) {

// find Etag, and Last-Modified
		foreach ( (array) $resp->headers as $h) {
			// 2003-03-02 - Nicola Asuni (www.tecnick.com) - fixed bug "Undefined offset: 1"
			if (strpos($h, ": ")) {
				list($field, $val) = explode(": ", $h, 2);
			}
			else {
				$field = $h;
				$val = "";
			}

if ( $field == 'etag' ) {
				$rss->etag = $val;
			}

if ( $field == 'last-modified' ) {
				$rss->last_modified = $val;
			}
		}

return $rss;
	} // else construct error message
	else {
		$errormsg = "Failed to parse RSS file.";

if ($rss) {
			$errormsg .= " (" . $rss->ERROR . ")";
		}
		// error($errormsg);

return false;
	} // end if ($rss and !$rss->error)
}

/**
 * Set up constants with default values, unless user overrides.
 *
 * @since 1.5.0
 * @package External
 * @subpackage MagpieRSS
 */
function init () {
	if ( defined('MAGPIE_INITALIZED') ) {
		return;
	}
	else {
		define('MAGPIE_INITALIZED', 1);
	}

if ( !defined('MAGPIE_CACHE_ON') ) {
		define('MAGPIE_CACHE_ON', 1);
	}

if ( !defined('MAGPIE_CACHE_DIR') ) {
		define('MAGPIE_CACHE_DIR', './cache');
	}

if ( !defined('MAGPIE_CACHE_AGE') ) {
		define('MAGPIE_CACHE_AGE', 60*60); // one hour
	}

if ( !defined('MAGPIE_CACHE_FRESH_ONLY') ) {
		define('MAGPIE_CACHE_FRESH_ONLY', 0);
	}

if ( !defined('MAGPIE_DEBUG') ) {
		define('MAGPIE_DEBUG', 0);
	}

if ( !defined('MAGPIE_USER_AGENT') ) {
		$ua = 'WordPress/' . $GLOBALS['wp_version'];

if ( MAGPIE_CACHE_ON ) {
			$ua = $ua . ')';
		}
		else {
			$ua = $ua . '; No cache)';
		}

define('MAGPIE_USER_AGENT', $ua);
	}

if ( !defined('MAGPIE_FETCH_TIME_OUT') ) {
		define('MAGPIE_FETCH_TIME_OUT', 2);	// 2 second timeout
	}

// use gzip encoding to fetch rss files if supported?
	if ( !defined('MAGPIE_USE_GZIP') ) {
		define('MAGPIE_USE_GZIP', true);
	}
}

function is_info ($sc) {
	return $sc >= 100 && $sc < 200;
}

function is_success ($sc) {
	return $sc >= 200 && $sc < 300;
}

function is_redirect ($sc) {
	return $sc >= 300 && $sc < 400;
}

function is_error ($sc) {
	return $sc >= 400 && $sc < 600;
}

function is_client_error ($sc) {
	return $sc >= 400 && $sc < 500;
}

function is_server_error ($sc) {
	return $sc >= 500 && $sc < 600;
}

class RSSCache {
	var $BASE_CACHE;	// where the cache files are stored
	var $MAX_AGE	= 43200;  		// when are files stale, default twelve hours
	var $ERROR 		= '';			// accumulate error messages

/**
	 * PHP5 constructor.
	 */
	function __construct( $base = '', $age = '' ) {
		$this->BASE_CACHE = WP_CONTENT_DIR . '/cache';
		if ( $base ) {
			$this->BASE_CACHE = $base;
		}
		if ( $age ) {
			$this->MAX_AGE = $age;
		}

}

/**
	 * PHP4 constructor.
	 */
	public function RSSCache( $base = '', $age = '' ) {
		self::__construct( $base, $age );
	}

/*=======================================================================*\
	Function:	set
	Purpose:	add an item to the cache, keyed on url
	Input:		url from which the rss file was fetched
	Output:		true on success
\*=======================================================================*/
	function set ($url, $rss) {
		$cache_option = 'rss_' . $this->file_name( $url );

set_transient($cache_option, $rss, $this->MAX_AGE);

return $cache_option;
	}

/*=======================================================================*\
	Function:	get
	Purpose:	fetch an item from the cache
	Input:		url from which the rss file was fetched
	Output:		cached object on HIT, false on MISS
\*=======================================================================*/
	function get ($url) {
		$this->ERROR = "";
		$cache_option = 'rss_' . $this->file_name( $url );

if ( ! $rss = get_transient( $cache_option ) ) {
			$this->debug(
				"Cache doesn't contain: $url (cache option: $cache_option)"
			);
			return 0;
		}

return $rss;
	}

/*=======================================================================*\
	Function:	check_cache
	Purpose:	check a url for membership in the cache
				and whether the object is older then MAX_AGE (ie. STALE)
	Input:		url from which the rss file was fetched
	Output:		cached object on HIT, false on MISS
\*=======================================================================*/
	function check_cache ( $url ) {
		$this->ERROR = "";
		$cache_option = 'rss_' . $this->file_name( $url );

if ( get_transient($cache_option) ) {
			// object exists and is current
				return 'HIT';
		} else {
			// object does not exist
			return 'MISS';
		}
	}

/*=======================================================================*\
	Function:	serialize
\*=======================================================================*/
	function serialize ( $rss ) {
		return serialize( $rss );
	}

/*=======================================================================*\
	Function:	unserialize
\*=======================================================================*/
	function unserialize ( $data ) {
		return unserialize( $data );
	}

/*=======================================================================*\
	Function:	file_name
	Purpose:	map url to location in cache
	Input:		url from which the rss file was fetched
	Output:		a file name
\*=======================================================================*/
	function file_name ($url) {
		return md5( $url );
	}

/*=======================================================================*\
	Function:	error
	Purpose:	register error
\*=======================================================================*/
	function error ($errormsg, $lvl=E_USER_WARNING) {
		$this->ERROR = $errormsg;
		if ( MAGPIE_DEBUG ) {
			trigger_error( $errormsg, $lvl);
		}
		else {
			error_log( $errormsg, 0);
		}
	}
			function debug ($debugmsg, $lvl=E_USER_NOTICE) {
		if ( MAGPIE_DEBUG ) {
			$this->error("MagpieRSS [debug] $debugmsg", $lvl);
		}
	}
}

if ( !function_exists('parse_w3cdtf') ) :
function parse_w3cdtf ( $date_str ) {

# regex to match wc3dtf
	$pat = "/(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2})(:(\d{2}))?(?:([-+])(\d{2}):?(\d{2})|(Z))?/";

if ( preg_match( $pat, $date_str, $match ) ) {
		list( $year, $month, $day, $hours, $minutes, $seconds) =
			array( $match[1], $match[2], $match[3], $match[4], $match[5], $match[7]);

# calc epoch for current date assuming GMT
		$epoch = gmmktime( $hours, $minutes, $seconds, $month, $day, $year);

$offset = 0;
		if ( $match[11] == 'Z' ) {
			# zulu time, aka GMT
		}
		else {
			list( $tz_mod, $tz_hour, $tz_min ) =
				array( $match[8], $match[9], $match[10]);

# zero out the variables
			if ( ! $tz_hour ) { $tz_hour = 0; }
			if ( ! $tz_min ) { $tz_min = 0; }

$offset_secs = (($tz_hour*60)+$tz_min)*60;

# is timezone ahead of GMT?  then subtract offset
			#
			if ( $tz_mod == '+' ) {
				$offset_secs = $offset_secs * -1;
			}

$offset = $offset_secs;
		}
		$epoch = $epoch + $offset;
		return $epoch;
	}
	else {
		return -1;
	}
}
endif;

if ( !function_exists('wp_rss') ) :
/**
 * Display all RSS items in a HTML ordered list.
 *
 * @since 1.5.0
 * @package External
 * @subpackage MagpieRSS
 *
 * @param string $url URL of feed to display. Will not auto sense feed URL.
 * @param int $num_items Optional. Number of items to display, default is all.
 */
function wp_rss( $url, $num_items = -1 ) {
	if ( $rss = fetch_rss( $url ) ) {
		echo '<ul>';

if ( $num_items !== -1 ) {
			$rss->items = array_slice( $rss->items, 0, $num_items );
		}

foreach ( (array) $rss->items as $item ) {
			printf(
				'<li><a href="%1$s" title="%2$s">%3$s</a></li>',
				esc_url( $item['link'] ),
				esc_attr( strip_tags( $item['description'] ) ),
				esc_html( $item['title'] )
			);
		}

echo '</ul>';
	} else {
		_e( 'An error has occurred, which probably means the feed is down. Try again later.' );
	}
}
endif;

if ( !function_exists('get_rss') ) :
/**
 * Display RSS items in HTML list items.
 *
 * You have to specify which HTML list you want, either ordered or unordered
 * before using the function. You also have to specify how many items you wish
 * to display. You can't display all of them like you can with wp_rss()
 * function.
 *
 * @since 1.5.0
 * @package External
 * @subpackage MagpieRSS
 *
 * @param string $url URL of feed to display. Will not auto sense feed URL.
 * @param int $num_items Optional. Number of items to display, default is all.
 * @return bool False on failure.
 */
function get_rss ($url, $num_items = 5) { // Like get posts, but for RSS
	$rss = fetch_rss($url);
	if ( $rss ) {
		$rss->items = array_slice($rss->items, 0, $num_items);
		foreach ( (array) $rss->items as $item ) {
			echo "<li>\n";
			echo "<a href='$item[link]' title='$item[description]'>";
			echo esc_html($item['title']);
			echo "</a><br />\n";
			echo "</li>\n";
		}
	} else {
		return false;
	}
}
endif;

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