MagpieRSS
Description Description
Source Source
File: wp-includes/rss.php
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 ); $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, $lvl = E_USER_WARNING ) { // append PHP's error message if track_errors enabled if ( isset($php_errormsg) ) { $errormsg .= " ($php_errormsg)"; } if ( MAGPIE_DEBUG ) { trigger_error( $errormsg, $lvl); } else { error_log( $errormsg, 0); } } }
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Methods Methods
- __construct — PHP5 constructor.
- append
- append_content
- concat
- error
- feed_cdata
- feed_end_element
- feed_start_element
- is_atom
- is_rss
- MagpieRSS — PHP4 constructor.
- map_attrs
- normalize