+ /**#@-*/
+
+ /**
+ * Setup and send HTTP headers. Don't send any content;
+ * content might end up being cached and re-sent with
+ * these same headers later.
+ *
+ * This should be called from the outHeader() method,
+ * but can also be called separately.
+ *
+ * @public
+ */
+ function httpHeaders() {
+ global $wgOut;
+
+ # We take over from $wgOut, excepting its cache header info
+ $wgOut->disable();
+ $mimetype = $this->contentType();
+ header( "Content-type: $mimetype; charset=UTF-8" );
+ $wgOut->sendCacheControl();
+
+ }
+
+ /**
+ * Return an internet media type to be sent in the headers.
+ *
+ * @return string
+ * @private
+ */
+ function contentType() {
+ global $wgRequest;
+ $ctype = $wgRequest->getVal('ctype','application/xml');
+ $allowedctypes = array('application/xml','text/xml','application/rss+xml','application/atom+xml');
+ return (in_array($ctype, $allowedctypes) ? $ctype : 'application/xml');
+ }
+
+ /**
+ * Output the initial XML headers with a stylesheet for legibility
+ * if someone finds it in a browser.
+ * @private
+ */
+ function outXmlHeader() {
+ global $wgServer, $wgStylePath, $wgStyleVersion;
+
+ $this->httpHeaders();
+ echo '<?xml version="1.0" encoding="utf-8"?>' . "\n";
+ echo '<?xml-stylesheet type="text/css" href="' .
+ htmlspecialchars( "$wgServer$wgStylePath/common/feed.css?$wgStyleVersion" ) . '"?' . ">\n";
+ }