RequestHandler handler = handlerClass.newInstance();
try {
handler.setCommand(command);
handler.setUrl(url);
handler.setSender(sender);
handler.handle();
sendHeader(out, "200 OK", handler.getContentType(), false);
out.write("Content-length: " + handler.getContent().length()
+ "\r\n");
out.write("\r\n");
out.write(handler.getContent());