276  * Output engine that sends data using Comet. This allows incremental pushing of data.

   277  * Note that this tends to not work with every server.

   278  */

   279 

   280 class Output_Comet extends Output_Naked

   281 {

   282 	/**

   283 	 * Be warned: this header function will flush ALL output buffers!

   284 	 */

   285 	

   286 	public function header()

   287 	{

   288 		while ( ob_get_level() )

   289 			ob_end_flush();

   290 	}

   291 	

   292 	/**

   293 	 * Write data and immediately send it to the client.

   294 	 * @param string Data to write

   295 	 */

   296 	

   297 	public function write($data)

   298 	{

   299 		echo $data;

   300 		flush();

   301 		if ( $data === 'STOP' || !stristr(@$_SERVER['HTTP_USER_AGENT'], 'gecko') || stristr(@$_SERVER['HTTP_USER_AGENT'], 'like gecko') )

   302 		{

   303 			global $db;

   304 			$db->close();

   305 			exit;

   306 		}

   307 	}

   308 }

   309 

   310 /**