TYPO3: in eigener Extension einen RSS-Feed anbieten

< ?php
/**
 * this class creates our RSS-Feed 
 *
 * @author		Paul Rohrbeck (rohrbeck@stimme.net)
 */
class user_createRSS {

	var $cObj;// The backReference to the mother cObj object set at call time

	/**
	 * main function, does everything you need... ;-)
	 * 
	 * @param	$content	content...
	 * @param	$conf		"variables"
	 */
	function main($content, $conf) {

		// some basic stuff:
		$ts = time();
		$base_url = $GLOBALS['TSFE']->tmpl->setup['config.']['baseURL'];
	
		// get started...
		$content .= '< ?xml version="1.0" encoding="utf-8"?>' . "\n";
		$content .= '<rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:atom="http://www.w3.org/2005/Atom">' . "\n";
			$content .= '<channel>' . "\n";
			
				// some basic information
				$content .= '<atom:link href="'.$base_url.'" rel="self" type="application/rss+xml" />' . "\n"; // unschön, müsste eigentlich auf sich selber verlinken
				$content .= '<title>'.$conf["title"].'</title>' . "\n";
				$content .= '<link>'.$base_url.'</link>' . "\n";
				$content .= '<description>'.$conf["description"].'</description>' . "\n";
				$content .= '<copyright>'.$conf["copyright"].'</copyright>' . "\n";
				$content .= '<language>'.$conf["language"].'</language>' . "\n";
				$content .= '<image>';
					$content .= '<title>'.$conf["title"].'</title>' . "\n";
					$content .= '<url>'. $base_url . $conf["image_url"].'</url>' . "\n";
					$content .= '<link>' .$base_url. '</link>' . "\n";
					$content .= '<width>'.$conf["image_width"].'</width>' . "\n";
					$content .= '<height>'.$conf["image_height"].'</height>' . "\n";
					$content .= '<description>'.$conf["image_description"].'</description>' . "\n";
				$content .= '</image>' . "\n";
				$content .= '<docs>http://blogs.law.harvard.edu/tech/rss</docs>' . "\n";	
			
				// connect to database: change whatever settings you wish
				$select_fields = '*';
				$from_table = 'tx_prsmallads_smallads'; // table of your extension
				$where = "deleted = 0 AND hidden = 0 AND endtime > $ts";
				$group = '';
				$order = '';
				$limit = '20';
				$res = $GLOBALS['TYPO3_DB']->exec_SELECTquery($select_fields, $from_table, $where, $group, $order, $limit);
				
				// now put in all the items:
				while($row = $GLOBALS['TYPO3_DB']->sql_fetch_assoc($res)){
				
					$pubDate = date('D, d M Y H:i:s O', $row["tstamp"]); // timestamp in the correct format for the rss feed
					$link_to_detailpage = $base_url . 'index.php?id='.$conf["singlePid"].'&amp;sid='.$row["uid"]; // link to the page with the detail view
					$description = substr($row["content"], 0, $conf["maxChars"]) . ' [...]';
				
					$content .= '<item>' . "\n";
						$content .= '<title>'.$row["cat"].': '.$row["title"].'</title>' . "\n";
						$content .= '<link>'.$link_to_detailpage.'</link>' . "\n";
						$content .= '<description>'.$description.'</description>' . "\n";
						$content .= '<guid>'.$link_to_detailpage.'</guid>' . "\n";
						$content .= '<pubdate>'.$pubDate.'</pubdate>' . "\n";
					$content .= '</item>';
					
				}
				
			$content .= '</channel>';
		$content .= '</rss>';
		
		return $content;
	}

}
?>

# create rss feed:
includeLibs.createRSS = path/to/your/file/create_rss.php 

temp.rssfeed = USER
temp.rssfeed {
	userFunc = user_createRSS->main

	title = Titel des Feeds
	description = Abonnieren Sie den RSS Feed.
	copyright = Peter Pan
	language = de

	# icon angaben
	image_width = 100
	image_height = 100
	image_description = hochschulen³ Logo
	image_url = path/to/your/logo/logo.png

	# single ansicht
	singlePid = 237
	
	# wie lang so der text sein
	maxChars = 200
}

# rss feed erstellen
rss200 = PAGE
rss200 {
  typeNum = 200
  config {
    # keine header daten aus TYPO3
    disableAllHeaderCode = 1
    # type und charset anpassen
    additionalHeaders = Content-type:text/xml;charset=utf-8
    # nicht zwingend nötig...
    linkVars = L,debug
    no_cache = 1
    xhtml_cleaning = 0
    admPanel = 0
  }
  # template einbinden
  10 < temp.rssfeed
}

page = PAGE
page {
    headerData.147 = TEXT
    headerData.147.value = <link rel="alternate" type="application/rss+xml" title="Titel des Feeds" href="http://deine-url.de/?type=200" />
}