<?php

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/**

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* MagpieRSS: a simple RSS integration tool

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*

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* A compiled file for RSS syndication

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*

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* @author Kellan Elliott-McCrea <kellan@protest.net>

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* @version 0.51

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* @license GPL

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*

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* @package External

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* @subpackage MagpieRSS

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* @deprecated 3.0.0 Use SimplePie instead.

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*/

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/**

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* Deprecated. Use SimplePie (class-simplepie.php) instead.

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*/

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_deprecated_file( basename( __FILE__ ), '3.0.0', WPINC . '/class-simplepie.php' );

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/**

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* Fires before MagpieRSS is loaded, to optionally replace it.

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*

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* @since 2.3.0

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* @deprecated 3.0.0

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*/

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do_action( 'load_feed_engine' );

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/** RSS feed constant. */

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define('RSS', 'RSS');

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define('ATOM', 'Atom');

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define('MAGPIE_USER_AGENT', 'WordPress/' . $GLOBALS['wp_version']);

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class MagpieRSS {

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var $parser;

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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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// parser variables

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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_field = '';

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var $current_namespace = false;

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//var $ERROR = "";

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

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/**

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* PHP5 constructor.

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*/

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function __construct( $source ) {

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# Check if PHP xml isn't compiled

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#

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if ( ! function_exists('xml_parser_create') ) {

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wp_trigger_error( '', "PHP's XML extension is not available. Please contact your hosting provider to enable PHP's XML extension." );

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return;

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}

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$parser = xml_parser_create();

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$this->parser = $parser;

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# pass in parser, and a reference to this object

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# set up handlers

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#

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xml_set_element_handler($this->parser,

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array( $this, 'feed_start_element' ), array( $this, 'feed_end_element' ) );

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

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

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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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$this->error( $errormsg );

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}

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}

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if ( PHP_VERSION_ID < 80000 ) { // xml_parser_free() has no effect as of PHP 8.0.

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xml_parser_free( $this->parser );

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}

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unset( $this->parser );

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$this->normalize();

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}

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/**

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* PHP4 constructor.

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*/

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public function MagpieRSS( $source ) {

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self::__construct( $source );

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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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// 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) = explode( ':', $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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# 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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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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// 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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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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# 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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$this->incontent = $el;

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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(array('MagpieRSS', 'map_attrs'),

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array_keys($attrs),

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array_values($attrs) ) );

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

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

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}

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// Atom support many links per containing 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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$this->append($link_el, $attrs['href']);

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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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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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function feed_end_element ($p, $el) {

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$el = strtolower($el);

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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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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: This may not actually be necessary

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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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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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$this->current_namespace = false;

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}

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function concat (&$str1, $str2="") {

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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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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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// smart append - field and namespace aware

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function append($el, $text) {

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if (!$el) {

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return;

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}

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if ( $this->current_namespace )

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{

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if ( $this->initem ) {

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$this->concat(

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$this->current_item[ $this->current_namespace ][ $el ], $text);

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}

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elseif ($this->inchannel) {

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$this->concat(

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$this->channel[ $this->current_namespace][ $el ], $text );

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}

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elseif ($this->intextinput) {

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$this->concat(

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$this->textinput[ $this->current_namespace][ $el ], $text );

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}

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elseif ($this->inimage) {

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$this->concat(

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$this->image[ $this->current_namespace ][ $el ], $text );

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}

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}

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else {

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if ( $this->initem ) {

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$this->concat(

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$this->current_item[ $el ], $text);

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}

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elseif ($this->intextinput) {

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$this->concat(

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$this->textinput[ $el ], $text );

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}

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elseif ($this->inimage) {

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$this->concat(

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$this->image[ $el ], $text );

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}

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elseif ($this->inchannel) {

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$this->concat(

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$this->channel[ $el ], $text );

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}

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}

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}

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function normalize () {

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// if atom populate rss fields

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if ( $this->is_atom() ) {

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$this->channel['description'] = $this->channel['tagline'];

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for ( $i = 0; $i < count($this->items); $i++) {

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

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if ( isset($item['summary']) )

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$item['description'] = $item['summary'];

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if ( isset($item['atom_content']))

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$item['content']['encoded'] = $item['atom_content'];

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

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}

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}

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elseif ( $this->is_rss() ) {

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$this->channel['tagline'] = $this->channel['description'];

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for ( $i = 0; $i < count($this->items); $i++) {

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

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if ( isset($item['description']))

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$item['summary'] = $item['description'];

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if ( isset($item['content']['encoded'] ) )

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$item['atom_content'] = $item['content']['encoded'];

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

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}

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}

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}

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function is_rss () {

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if ( $this->feed_type == RSS ) {

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return $this->feed_version;

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}

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else {

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return false;

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}

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}

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function is_atom() {

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if ( $this->feed_type == ATOM ) {

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return $this->feed_version;

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}

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else {

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return false;

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}

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}

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function map_attrs($k, $v) {

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return "$k=\"$v\"";

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}

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function error( $errormsg, $lvl = E_USER_WARNING ) {

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if ( MAGPIE_DEBUG ) {

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wp_trigger_error('', $errormsg, $lvl);

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} else {

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error_log( $errormsg, 0);

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}

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}

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}

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if ( !function_exists('fetch_rss') ) :

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/**

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* Build Magpie object based on RSS from URL.

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*

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* @since 1.5.0

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* @package External

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* @subpackage MagpieRSS

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*

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* @param string $url URL to retrieve feed.

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* @return MagpieRSS|false MagpieRSS object on success, false on failure.

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*/

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function fetch_rss ($url) {

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// initialize constants

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init();

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if ( !isset($url) ) {

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// error("fetch_rss called without a url");

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return false;

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}

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// if cache is disabled

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if ( !MAGPIE_CACHE_ON ) {

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// fetch file, and parse it

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$resp = _fetch_remote_file( $url );

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if ( is_success( $resp->status ) ) {

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return _response_to_rss( $resp );

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}

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else {

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// error("Failed to fetch $url and cache is off");

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return false;

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}

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}

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// else cache is ON

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else {

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// Flow

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// 1. check cache

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// 2. if there is a hit, make sure it's fresh

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// 3. if cached obj fails freshness check, fetch remote

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// 4. if remote fails, return stale object, or error

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$cache = new RSSCache( MAGPIE_CACHE_DIR, MAGPIE_CACHE_AGE );

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if (MAGPIE_DEBUG and $cache->ERROR) {

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debug($cache->ERROR, E_USER_WARNING);

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}

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$cache_status = 0; // response of check_cache

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$request_headers = array(); // HTTP headers to send with fetch

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$rss = 0; // parsed RSS object

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$errormsg = 0; // errors, if any

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if (!$cache->ERROR) {

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// return cache HIT, MISS, or STALE

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$cache_status = $cache->check_cache( $url );

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}

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// if object cached, and cache is fresh, return cached obj

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if ( $cache_status == 'HIT' ) {

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$rss = $cache->get( $url );

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if ( isset($rss) and $rss ) {

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$rss->from_cache = 1;

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if ( MAGPIE_DEBUG > 1) {

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debug("MagpieRSS: Cache HIT", E_USER_NOTICE);

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}

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return $rss;

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}

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}

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// else attempt a conditional get

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// set up headers

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if ( $cache_status == 'STALE' ) {

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$rss = $cache->get( $url );

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if ( isset($rss->etag) and $rss->last_modified ) {

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$request_headers['If-None-Match'] = $rss->etag;

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$request_headers['If-Last-Modified'] = $rss->last_modified;

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}

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}

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

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if (isset($resp) and $resp) {

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if ($resp->status == '304' ) {

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// we have the most current copy

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if ( MAGPIE_DEBUG > 1) {

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debug("Got 304 for $url");

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}

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// reset cache on 304 (at minutillo insistent prodding)

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$cache->set($url, $rss);

[488] Fix | Delete

return $rss;

[489] Fix | Delete

}

[490] Fix | Delete

elseif ( is_success( $resp->status ) ) {

[491] Fix | Delete

$rss = _response_to_rss( $resp );

[492] Fix | Delete

if ( $rss ) {

[493] Fix | Delete

if (MAGPIE_DEBUG > 1) {

[494] Fix | Delete

debug("Fetch successful");

[495] Fix | Delete

}

[496] Fix | Delete

// add object to cache

[497] Fix | Delete

$cache->set( $url, $rss );

[498] Fix | Delete

return $rss;

[499] Fix | Delete