rss_parse.inc

下载系统 # 汉化：Fising # 邮箱：[e-mail] # 网址：http://www.fising.cn # 声明：本人水平有限

                $this->append_content("<$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['description'] = $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'];
                
                $atom_date = (isset($item['issued']) ) ? $item['issued'] : $item['modified'];
                if ( $atom_date ) {
                    $epoch = @parse_w3cdtf($atom_date);
                    if ($epoch and $epoch > 0) {
                        $item['date_timestamp'] = $epoch;
                    }
                }
                
                $this->items[$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'];
                
                if ( $this->is_rss() == '1.0' and isset($item['dc']['date']) ) {
                    $epoch = @parse_w3cdtf($item['dc']['date']);
                    if ($epoch and $epoch > 0) {
                        $item['date_timestamp'] = $epoch;
                    }
                }
                elseif ( isset($item['pubdate']) ) {
                    $epoch = @strtotime($item['pubdate']);
                    if ($epoch > 0) {
                        $item['date_timestamp'] = $epoch;
                    }
                }
                
                $this->items[$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;
        }
    }

    /**
    * return XML parser, and possibly re-encoded source
    *
    */
    function create_parser($source, $out_enc, $in_enc, $detect) {
        if ( substr(phpversion(),0,1) == 5) {
            $parser = $this->php5_create_parser($in_enc, $detect);
        }
        else {
            list($parser, $source) = $this->php4_create_parser($source, $in_enc, $detect);
        }
        if ($out_enc) {
            $this->encoding = $out_enc;
            xml_parser_set_option($parser, XML_OPTION_TARGET_ENCODING, $out_enc);
        }
        
        return array($parser, $source);
    }
    
    /**
    * Instantiate an XML parser under PHP5
    *
    * PHP5 will do a fine job of detecting input encoding
    * if passed an empty string as the encoding. 
    *
    * All hail libxml2!
    *
    */
    function php5_create_parser($in_enc, $detect) {
        // by default php5 does a fine job of detecting input encodings
        if(!$detect && $in_enc) {
            return xml_parser_create($in_enc);
        }
        else {
            return xml_parser_create('');
        }
    }
    
    /**
    * Instaniate an XML parser under PHP4
    *
    * Unfortunately PHP4's support for character encodings
    * and especially XML and character encodings sucks.  As
    * long as the documents you parse only contain characters
    * from the ISO-8859-1 character set (a superset of ASCII,
    * and a subset of UTF-8) you're fine.  However once you
    * step out of that comfy little world things get mad, bad,
    * and dangerous to know.
    *
    * The following code is based on SJM's work with FoF
    * @see http://minutillo.com/steve/weblog/2004/6/17/php-xml-and-character-encodings-a-tale-of-sadness-rage-and-data-loss
    *
    */
    function php4_create_parser($source, $in_enc, $detect) {
        if ( !$detect ) {
            return array(xml_parser_create($in_enc), $source);
        }
        
        if (!$in_enc) {
            if (preg_match('/<?xml.*encoding=[\'"](.*?)[\'"].*?>/m', $source, $m)) {
                $in_enc = strtoupper($m[1]);
                $this->source_encoding = $in_enc;
            }
            else {
                $in_enc = 'UTF-8';
            }
        }
        
        if ($this->known_encoding($in_enc)) {
            return array(xml_parser_create($in_enc), $source);
        }
        
        // the dectected encoding is not one of the simple encodings PHP knows
        
        // attempt to use the iconv extension to
        // cast the XML to a known encoding
        // @see http://php.net/iconv
       
        if (function_exists('iconv'))  {
            $encoded_source = iconv($in_enc,'UTF-8', $source);
            if ($encoded_source) {
                return array(xml_parser_create('UTF-8'), $encoded_source);
            }
        }
        
        // iconv didn't work, try mb_convert_encoding
        // @see http://php.net/mbstring
        if(function_exists('mb_convert_encoding')) {
            $encoded_source = mb_convert_encoding($source, 'UTF-8', $in_enc );
            if ($encoded_source) {
                return array(xml_parser_create('UTF-8'), $encoded_source);
            }
        }
        
        // else 
        $this->error("Feed is in an unsupported character encoding. ($in_enc) " .
                     "You may see strange artifacts, and mangled characters.",
                     E_USER_NOTICE);
            
        return array(xml_parser_create(), $source);
    }
    
    function known_encoding($enc) {
        $enc = strtoupper($enc);
        if ( in_array($enc, $this->_KNOWN_ENCODINGS) ) {
            return $enc;
        }
        else {
            return false;
        }
    }

    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);
        }
        
        $notices = E_USER_NOTICE|E_NOTICE;
        if ( $lvl&$notices ) {
            $this->WARNING = $errormsg;
        } else {
            $this->ERROR = $errormsg;
        }
    }
    
    
} // end class RSS

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

// patch to support medieval versions of PHP4.1.x, 
// courtesy, Ryan Currie, [e-mail]

if (!function_exists('array_change_key_case')) {
	define("CASE_UPPER",1);
	define("CASE_LOWER",0);


	function array_change_key_case($array,$case=CASE_LOWER) {
       if ($case=CASE_LOWER) $cmd=strtolower;
       elseif ($case=CASE_UPPER) $cmd=strtoupper;
       foreach($array as $key=>$value) {
               $output[$cmd($key)]=$value;
       }
       return $output;
	}

}

?>